examples/advanced_faults/ipc_failure_during_stream.py

@@ -62,9 +62,7 @@ async def recv_and_spawn_net_killers(
     await ctx.started()
     async with (
         ctx.open_stream() as stream,
-        trio.open_nursery(
+        trio.open_nursery() as n,
-            strict_exception_groups=False,
-        ) as tn,
     ):
         async for i in stream:
             print(f'child echoing {i}')
@@ -79,11 +77,11 @@ async def recv_and_spawn_net_killers(
                 i >= break_ipc_after
             ):
                 broke_ipc = True
-                tn.start_soon(
+                n.start_soon(
                     iter_ipc_stream,
                     stream,
                 )
-                tn.start_soon(
+                n.start_soon(
                     partial(
                         break_ipc_then_error,
                         stream=stream,

examples/debugging/asyncio_bp.py

@@ -1,16 +1,8 @@
-'''
-Examples of using the builtin `breakpoint()` from an `asyncio.Task`
-running in a subactor spawned with `infect_asyncio=True`.
-
-'''
 import asyncio
 
 import trio
 import tractor
-from tractor import (
+from tractor import to_asyncio
-    to_asyncio,
-    Portal,
-)
 
 
 async def aio_sleep_forever():
@@ -25,21 +17,21 @@ async def bp_then_error(
 
 ) -> None:
 
-    # sync with `trio`-side (caller) task
+    # sync with ``trio``-side (caller) task
     to_trio.send_nowait('start')
 
     # NOTE: what happens here inside the hook needs some refinement..
     # => seems like it's still `._debug._set_trace()` but
     #    we set `Lock.local_task_in_debug = 'sync'`, we probably want
-    #    some further, at least, meta-data about the task/actor in debug
+    #    some further, at least, meta-data about the task/actoq in debug
-    #    in terms of making it clear it's `asyncio` mucking about.
+    #    in terms of making it clear it's asyncio mucking about.
-    breakpoint()  # asyncio-side
+    breakpoint()
 
     # short checkpoint / delay
-    await asyncio.sleep(0.5)  # asyncio-side
+    await asyncio.sleep(0.5)
 
     if raise_after_bp:
-        raise ValueError('asyncio side error!')
+        raise ValueError('blah')
 
     # TODO: test case with this so that it gets cancelled?
     else:
@@ -57,21 +49,23 @@ async def trio_ctx(
     # this will block until the ``asyncio`` task sends a "first"
     # message, see first line in above func.
     async with (
+
         to_asyncio.open_channel_from(
             bp_then_error,
-            # raise_after_bp=not bp_before_started,
+            raise_after_bp=not bp_before_started,
         ) as (first, chan),
 
-        trio.open_nursery() as tn,
+        trio.open_nursery() as n,
     ):
+
         assert first == 'start'
 
         if bp_before_started:
-            await tractor.pause()  # trio-side
+            await tractor.breakpoint()
 
-        await ctx.started(first)  # trio-side
+        await ctx.started(first)
 
-        tn.start_soon(
+        n.start_soon(
             to_asyncio.run_task,
             aio_sleep_forever,
         )
@@ -79,50 +73,39 @@ async def trio_ctx(
 
 
 async def main(
-    bps_all_over: bool = True,
+    bps_all_over: bool = False,
-
-    # TODO, WHICH OF THESE HAZ BUGZ?
-    cancel_from_root: bool = False,
-    err_from_root: bool = False,
 
 ) -> None:
 
     async with tractor.open_nursery(
-        debug_mode=True,
+        # debug_mode=True,
-        maybe_enable_greenback=True,
+    ) as n:
-        # loglevel='devx',
+
-    ) as an:
+        p = await n.start_actor(
-        ptl: Portal = await an.start_actor(
             'aio_daemon',
             enable_modules=[__name__],
             infect_asyncio=True,
             debug_mode=True,
-            # loglevel='cancel',
+            loglevel='cancel',
         )
 
-        async with ptl.open_context(
+        async with p.open_context(
             trio_ctx,
             bp_before_started=bps_all_over,
         ) as (ctx, first):
 
             assert first == 'start'
 
-            # pause in parent to ensure no cross-actor
+            if bps_all_over:
-            # locking problems exist!
+                await tractor.breakpoint()
-            await tractor.pause()  # trio-root
-
-            if cancel_from_root:
-                await ctx.cancel()
-
-            if err_from_root:
-                assert 0
-            else:
-                await trio.sleep_forever()
 
+            # await trio.sleep_forever()
+            await ctx.cancel()
+            assert 0
 
         # TODO: case where we cancel from trio-side while asyncio task
         # has debugger lock?
-        # await ptl.cancel_actor()
+        # await p.cancel_actor()
 
 
 if __name__ == '__main__':

examples/debugging/fast_error_in_root_after_spawn.py

@@ -1,5 +1,5 @@
 '''
-Fast fail test with a `Context`.
+Fast fail test with a context.
 
 Ensure the partially initialized sub-actor process
 doesn't cause a hang on error/cancel of the parent

examples/debugging/multi_daemon_subactors.py

@@ -7,7 +7,7 @@ async def breakpoint_forever():
     try:
         while True:
             yield 'yo'
-            await tractor.pause()
+            await tractor.breakpoint()
     except BaseException:
         tractor.log.get_console_log().exception(
             'Cancelled while trying to enter pause point!'
@@ -21,14 +21,11 @@ async def name_error():
 
 
 async def main():
-    '''
+    """Test breakpoint in a streaming actor.
-    Test breakpoint in a streaming actor.
+    """
-
-    '''
     async with tractor.open_nursery(
         debug_mode=True,
         loglevel='cancel',
-        # loglevel='devx',
     ) as n:
 
         p0 = await n.start_actor('bp_forever', enable_modules=[__name__])

examples/debugging/multi_nested_subactors_error_up_through_nurseries.py

@@ -10,7 +10,7 @@ async def name_error():
 async def breakpoint_forever():
     "Indefinitely re-enter debugger in child actor."
     while True:
-        await tractor.pause()
+        await tractor.breakpoint()
 
         # NOTE: if the test never sent 'q'/'quit' commands
         # on the pdb repl, without this checkpoint line the

examples/debugging/multi_subactor_root_errors.py

@@ -40,7 +40,7 @@ async def main():
     """
     async with tractor.open_nursery(
         debug_mode=True,
-        loglevel='devx',
+        # loglevel='cancel',
     ) as n:
 
         # spawn both actors

examples/debugging/multi_subactors.py

@@ -6,7 +6,7 @@ async def breakpoint_forever():
     "Indefinitely re-enter debugger in child actor."
     while True:
         await trio.sleep(0.1)
-        await tractor.pause()
+        await tractor.breakpoint()
 
 
 async def name_error():

examples/debugging/restore_builtin_breakpoint.py

@@ -6,44 +6,19 @@ import tractor
 
 
 async def main() -> None:
+    async with tractor.open_nursery(debug_mode=True) as an:
 
-    # intially unset, no entry.
+        assert os.environ['PYTHONBREAKPOINT'] == 'tractor._debug._set_trace'
-    orig_pybp_var: int = os.environ.get('PYTHONBREAKPOINT')
-    assert orig_pybp_var in {None, "0"}
-
-    async with tractor.open_nursery(
-        debug_mode=True,
-    ) as an:
-        assert an
-        assert (
-            (pybp_var := os.environ['PYTHONBREAKPOINT'])
-            ==
-            'tractor.devx._debug._sync_pause_from_builtin'
-        )
 
         # TODO: an assert that verifies the hook has indeed been, hooked
         # XD
-        assert (
+        assert sys.breakpointhook is not tractor._debug._set_trace
-            (pybp_hook := sys.breakpointhook)
-            is not tractor.devx._debug._set_trace
-        )
 
-        print(
+        breakpoint()
-            f'$PYTHONOBREAKPOINT: {pybp_var!r}\n'
-            f'`sys.breakpointhook`: {pybp_hook!r}\n'
-        )
-        breakpoint()  # first bp, tractor hook set.
 
-    # XXX AFTER EXIT (of actor-runtime) verify the hook is unset..
+    # TODO: an assert that verifies the hook is unhooked..
-    #
-    # YES, this is weird but it's how stdlib docs say to do it..
-    # https://docs.python.org/3/library/sys.html#sys.breakpointhook
-    assert os.environ.get('PYTHONBREAKPOINT') is orig_pybp_var
     assert sys.breakpointhook
-
+    breakpoint()
-    # now ensure a regular builtin pause still works
-    breakpoint()  # last bp, stdlib hook restored
-
 
 if __name__ == '__main__':
     trio.run(main)

examples/debugging/root_actor_breakpoint.py

@@ -10,7 +10,7 @@ async def main():
 
         await trio.sleep(0.1)
 
-        await tractor.pause()
+        await tractor.breakpoint()
 
         await trio.sleep(0.1)
 

examples/debugging/root_actor_breakpoint_forever.py

@@ -11,7 +11,7 @@ async def main(
         # loglevel='runtime',
     ):
         while True:
-            await tractor.pause()
+            await tractor.breakpoint()
 
 
 if __name__ == '__main__':

examples/debugging/shield_hang_in_sub.py

@@ -1,83 +0,0 @@
-'''
-Verify we can dump a `stackscope` tree on a hang.
-
-'''
-import os
-import signal
-
-import trio
-import tractor
-
-@tractor.context
-async def start_n_shield_hang(
-    ctx: tractor.Context,
-):
-    # actor: tractor.Actor = tractor.current_actor()
-
-    # sync to parent-side task
-    await ctx.started(os.getpid())
-
-    print('Entering shield sleep..')
-    with trio.CancelScope(shield=True):
-        await trio.sleep_forever()  # in subactor
-
-    # XXX NOTE ^^^ since this shields, we expect
-    # the zombie reaper (aka T800) to engage on
-    # SIGINT from the user and eventually hard-kill
-    # this subprocess!
-
-
-async def main(
-    from_test: bool = False,
-) -> None:
-
-    async with (
-        tractor.open_nursery(
-            debug_mode=True,
-            enable_stack_on_sig=True,
-            # maybe_enable_greenback=False,
-            loglevel='devx',
-        ) as an,
-    ):
-        ptl: tractor.Portal  = await an.start_actor(
-            'hanger',
-            enable_modules=[__name__],
-            debug_mode=True,
-        )
-        async with ptl.open_context(
-            start_n_shield_hang,
-        ) as (ctx, cpid):
-
-            _, proc, _ = an._children[ptl.chan.uid]
-            assert cpid == proc.pid
-
-            print(
-                'Yo my child hanging..?\n'
-                # "i'm a user who wants to see a `stackscope` tree!\n"
-            )
-
-            # XXX simulate the wrapping test's "user actions"
-            # (i.e. if a human didn't run this manually but wants to
-            # know what they should do to reproduce test behaviour)
-            if from_test:
-                print(
-                    f'Sending SIGUSR1 to {cpid!r}!\n'
-                )
-                os.kill(
-                    cpid,
-                    signal.SIGUSR1,
-                )
-
-                # simulate user cancelling program
-                await trio.sleep(0.5)
-                os.kill(
-                    os.getpid(),
-                    signal.SIGINT,
-                )
-            else:
-                # actually let user send the ctl-c
-                await trio.sleep_forever()  # in root
-
-
-if __name__ == '__main__':
-    trio.run(main)

examples/debugging/subactor_bp_in_ctx.py

@@ -4,9 +4,9 @@ import trio
 
 async def gen():
     yield 'yo'
-    await tractor.pause()
+    await tractor.breakpoint()
     yield 'yo'
-    await tractor.pause()
+    await tractor.breakpoint()
 
 
 @tractor.context
@@ -15,7 +15,7 @@ async def just_bp(
 ) -> None:
 
     await ctx.started()
-    await tractor.pause()
+    await tractor.breakpoint()
 
     # TODO: bps and errors in this call..
     async for val in gen():

examples/debugging/sync_bp.py

@@ -4,13 +4,6 @@ import time
 import trio
 import tractor
 
-# TODO: only import these when not running from test harness?
-# can we detect `pexpect` usage maybe?
-# from tractor.devx._debug import (
-#     get_lock,
-#     get_debug_req,
-# )
-
 
 def sync_pause(
     use_builtin: bool = False,
@@ -25,13 +18,7 @@ def sync_pause(
         breakpoint(hide_tb=hide_tb)
 
     else:
-        # TODO: maybe for testing some kind of cm style interface
-        # where the `._set_trace()` call doesn't happen until block
-        # exit?
-        # assert get_lock().ctx_in_debug is None
-        # assert get_debug_req().repl is None
         tractor.pause_from_sync()
-        # assert get_debug_req().repl is None
 
     if error:
         raise RuntimeError('yoyo sync code error')
@@ -54,11 +41,10 @@ async def start_n_sync_pause(
 async def main() -> None:
     async with (
         tractor.open_nursery(
-            debug_mode=True,
+            # NOTE: required for pausing from sync funcs
             maybe_enable_greenback=True,
-            enable_stack_on_sig=True,
+            debug_mode=True,
-            # loglevel='warning',
+            # loglevel='cancel',
-            # loglevel='devx',
         ) as an,
         trio.open_nursery() as tn,
     ):
@@ -152,9 +138,7 @@ async def main() -> None:
                     # the case 2. from above still exists!
                     use_builtin=True,
                 ),
-                # TODO: with this `False` we can hang!??!
+                abandon_on_cancel=False,
-                # abandon_on_cancel=False,
-                abandon_on_cancel=True,
                 thread_name='inline_root_bg_thread',
             )
 

examples/full_fledged_streaming_service.py

@@ -91,7 +91,7 @@ async def main() -> list[int]:
     an: ActorNursery
     async with tractor.open_nursery(
         loglevel='cancel',
-        # debug_mode=True,
+        debug_mode=True,
     ) as an:
 
         seed = int(1e3)

examples/quick_cluster.py

@@ -3,18 +3,20 @@ import trio
 import tractor
 
 
-async def sleepy_jane() -> None:
+async def sleepy_jane():
-    uid: tuple = tractor.current_actor().uid
+    uid = tractor.current_actor().uid
     print(f'Yo i am actor {uid}')
     await trio.sleep_forever()
 
 
 async def main():
     '''
-    Spawn a flat actor cluster, with one process per detected core.
+    Spawn a flat actor cluster, with one process per
+    detected core.
 
     '''
     portal_map: dict[str, tractor.Portal]
+    results: dict[str, str]
 
     # look at this hip new syntax!
     async with (
@@ -23,16 +25,11 @@ async def main():
             modules=[__name__]
         ) as portal_map,
 
-        trio.open_nursery(
+        trio.open_nursery() as n,
-            strict_exception_groups=False,
-        ) as tn,
     ):
 
         for (name, portal) in portal_map.items():
-            tn.start_soon(
+            n.start_soon(portal.run, sleepy_jane)
-                portal.run,
-                sleepy_jane,
-            )
 
         await trio.sleep(0.5)
 
@@ -44,4 +41,4 @@ if __name__ == '__main__':
     try:
         trio.run(main)
     except KeyboardInterrupt:
-        print('trio cancelled by KBI')
+        pass

notes_to_self/howtorelease.md

@@ -1,18 +0,0 @@
-First generate a built disti:
-
-```
-python -m pip install --upgrade build
-python -m build --sdist --outdir dist/alpha5/
-```
-
-Then try a test ``pypi`` upload:
-
-```
-python -m twine upload --repository testpypi dist/alpha5/*
-```
-
-The push to `pypi` for realz.
-
-```
-python -m twine upload --repository testpypi dist/alpha5/*
-```

pyproject.toml

@@ -37,14 +37,16 @@ dependencies = [
   # https://packaging.python.org/en/latest/discussions/install-requires-vs-requirements/#id5
   # TODO, for 3.13 we must go go `0.27` which means we have to
   # disable strict egs or port to handling them internally!
-  "trio>0.27",
+  # trio='^0.27'
+  "trio>=0.24,<0.25",
   "tricycle>=0.4.1,<0.5",
   "wrapt>=1.16.0,<2",
   "colorlog>=6.8.2,<7",
   # built-in multi-actor `pdb` REPL
-  "pdbp>=1.6,<2", # windows only (from `pdbp`)
+  "pdbp>=1.5.0,<2",
   # typed IPC msging
-  "msgspec>=0.19.0",
+  # TODO, get back on release once 3.13 support is out!
+  "msgspec",
 ]
 
 # ------ project ------
@@ -54,14 +56,18 @@ dev = [
   # test suite
   # TODO: maybe some of these layout choices?
   # https://docs.pytest.org/en/8.0.x/explanation/goodpractices.html#choosing-a-test-layout-import-rules
-  "pytest>=8.3.5",
+  "pytest>=8.2.0,<9",
   "pexpect>=4.9.0,<5",
   # `tractor.devx` tooling
   "greenback>=1.2.1,<2",
   "stackscope>=0.2.2,<0.3",
+
+  # xonsh usage/integration (namely as @goodboy's sh of choice Bp)
+  "xonsh>=0.19.1",
+  "xontrib-vox>=0.0.1,<0.0.2",
+  "prompt-toolkit>=3.0.43,<4",
+  "xonsh-vox-tabcomplete>=0.5,<0.6",
   "pyperclip>=1.9.0",
-  "prompt-toolkit>=3.0.50",
-  "xonsh>=0.19.2",
 ]
 # TODO, add these with sane versions; were originally in
 # `requirements-docs.txt`..
@@ -72,39 +78,21 @@ dev = [
 
 # ------ dependency-groups ------
 
-# ------ dependency-groups ------
-
 [tool.uv.sources]
-# XXX NOTE, only for @goodboy's hacking on `pprint(sort_dicts=False)`
+msgspec = { git = "https://github.com/jcrist/msgspec.git" }
-# for the `pp` alias..
-# pdbp = { path = "../pdbp", editable = true }
 
 # ------ tool.uv.sources ------
 # TODO, distributed (multi-host) extensions
 # linux kernel networking
 # 'pyroute2
 
-# ------ tool.uv.sources ------
-
-[tool.uv]
-# XXX NOTE, prefer the sys python bc apparently the distis from
-# `astral` are built in a way that breaks `pdbp`+`tabcompleter`'s
-# likely due to linking against `libedit` over `readline`..
-# |_https://docs.astral.sh/uv/concepts/python-versions/#managed-python-distributions
-# |_https://gregoryszorc.com/docs/python-build-standalone/main/quirks.html#use-of-libedit-on-linux
-#
-# https://docs.astral.sh/uv/reference/settings/#python-preference
-python-preference = 'system'
-
-# ------ tool.uv ------
-
 [tool.hatch.build.targets.sdist]
 include = ["tractor"]
 
 [tool.hatch.build.targets.wheel]
 include = ["tractor"]
 
-# ------ tool.hatch ------
+# ------ dependency-groups ------
 
 [tool.towncrier]
 package = "tractor"
@@ -154,5 +142,3 @@ log_cli = false
 # TODO: maybe some of these layout choices?
 # https://docs.pytest.org/en/8.0.x/explanation/goodpractices.html#choosing-a-test-layout-import-rules
 # pythonpath = "src"
-
-# ------ tool.pytest ------

tests/conftest.py

@@ -75,10 +75,7 @@ def pytest_configure(config):
 
 @pytest.fixture(scope='session')
 def debug_mode(request):
-    debug_mode: bool = request.config.option.tractor_debug_mode
+    return request.config.option.tractor_debug_mode
-    # if debug_mode:
-    #     breakpoint()
-    return debug_mode
 
 
 @pytest.fixture(scope='session', autouse=True)
@@ -95,12 +92,6 @@ def spawn_backend(request) -> str:
     return request.config.option.spawn_backend
 
 
-# @pytest.fixture(scope='function', autouse=True)
-# def debug_enabled(request) -> str:
-#     from tractor import _state
-#     if _state._runtime_vars['_debug_mode']:
-#         breakpoint()
-
 _ci_env: bool = os.environ.get('CI', False)
 
 
@@ -159,18 +150,6 @@ def pytest_generate_tests(metafunc):
         metafunc.parametrize("start_method", [spawn_backend], scope='module')
 
 
-# TODO: a way to let test scripts (like from `examples/`)
-# guarantee they won't registry addr collide!
-# @pytest.fixture
-# def open_test_runtime(
-#     reg_addr: tuple,
-# ) -> AsyncContextManager:
-#     return partial(
-#         tractor.open_nursery,
-#         registry_addrs=[reg_addr],
-#     )
-
-
 def sig_prog(proc, sig):
     "Kill the actor-process with ``sig``."
     proc.send_signal(sig)

tests/devx/conftest.py

@@ -1,243 +0,0 @@
-'''
-`tractor.devx.*` tooling sub-pkg test space.
-
-'''
-import time
-from typing import (
-    Callable,
-)
-
-import pytest
-from pexpect.exceptions import (
-    TIMEOUT,
-)
-from pexpect.spawnbase import SpawnBase
-
-from tractor._testing import (
-    mk_cmd,
-)
-from tractor.devx._debug import (
-    _pause_msg as _pause_msg,
-    _crash_msg as _crash_msg,
-    _repl_fail_msg as _repl_fail_msg,
-    _ctlc_ignore_header as _ctlc_ignore_header,
-)
-from ..conftest import (
-    _ci_env,
-)
-
-
-@pytest.fixture
-def spawn(
-    start_method,
-    testdir: pytest.Pytester,
-    reg_addr: tuple[str, int],
-
-) -> Callable[[str], None]:
-    '''
-    Use the `pexpect` module shipped via `testdir.spawn()` to
-    run an `./examples/..` script by name.
-
-    '''
-    if start_method != 'trio':
-        pytest.skip(
-            '`pexpect` based tests only supported on `trio` backend'
-        )
-
-    def unset_colors():
-        '''
-        Python 3.13 introduced colored tracebacks that break patt
-        matching,
-
-        https://docs.python.org/3/using/cmdline.html#envvar-PYTHON_COLORS
-        https://docs.python.org/3/using/cmdline.html#using-on-controlling-color
-
-        '''
-        import os
-        os.environ['PYTHON_COLORS'] = '0'
-
-    def _spawn(
-        cmd: str,
-        **mkcmd_kwargs,
-    ):
-        unset_colors()
-        return testdir.spawn(
-            cmd=mk_cmd(
-                cmd,
-                **mkcmd_kwargs,
-            ),
-            expect_timeout=3,
-            # preexec_fn=unset_colors,
-            # ^TODO? get `pytest` core to expose underlying
-            # `pexpect.spawn()` stuff?
-        )
-
-    # such that test-dep can pass input script name.
-    return _spawn
-
-
-@pytest.fixture(
-    params=[False, True],
-    ids='ctl-c={}'.format,
-)
-def ctlc(
-    request,
-    ci_env: bool,
-
-) -> bool:
-
-    use_ctlc = request.param
-
-    node = request.node
-    markers = node.own_markers
-    for mark in markers:
-        if mark.name == 'has_nested_actors':
-            pytest.skip(
-                f'Test {node} has nested actors and fails with Ctrl-C.\n'
-                f'The test can sometimes run fine locally but until'
-                ' we solve' 'this issue this CI test will be xfail:\n'
-                'https://github.com/goodboy/tractor/issues/320'
-            )
-
-        if mark.name == 'ctlcs_bish':
-            pytest.skip(
-                f'Test {node} prolly uses something from the stdlib (namely `asyncio`..)\n'
-                f'The test and/or underlying example script can *sometimes* run fine '
-                f'locally but more then likely until the cpython peeps get their sh#$ together, '
-                f'this test will definitely not behave like `trio` under SIGINT..\n'
-            )
-
-    if use_ctlc:
-        # XXX: disable pygments highlighting for auto-tests
-        # since some envs (like actions CI) will struggle
-        # the the added color-char encoding..
-        from tractor.devx._debug import TractorConfig
-        TractorConfig.use_pygements = False
-
-    yield use_ctlc
-
-
-def expect(
-    child,
-
-    # normally a `pdb` prompt by default
-    patt: str,
-
-    **kwargs,
-
-) -> None:
-    '''
-    Expect wrapper that prints last seen console
-    data before failing.
-
-    '''
-    try:
-        child.expect(
-            patt,
-            **kwargs,
-        )
-    except TIMEOUT:
-        before = str(child.before.decode())
-        print(before)
-        raise
-
-
-PROMPT = r"\(Pdb\+\)"
-
-
-def in_prompt_msg(
-    child: SpawnBase,
-    parts: list[str],
-
-    pause_on_false: bool = False,
-    err_on_false: bool = False,
-    print_prompt_on_false: bool = True,
-
-) -> bool:
-    '''
-    Predicate check if (the prompt's) std-streams output has all
-    `str`-parts in it.
-
-    Can be used in test asserts for bulk matching expected
-    log/REPL output for a given `pdb` interact point.
-
-    '''
-    __tracebackhide__: bool = False
-
-    before: str = str(child.before.decode())
-    for part in parts:
-        if part not in before:
-            if pause_on_false:
-                import pdbp
-                pdbp.set_trace()
-
-            if print_prompt_on_false:
-                print(before)
-
-            if err_on_false:
-                raise ValueError(
-                    f'Could not find pattern in `before` output?\n'
-                    f'part: {part!r}\n'
-                )
-            return False
-
-    return True
-
-
-# TODO: todo support terminal color-chars stripping so we can match
-# against call stack frame output from the the 'll' command the like!
-# -[ ] SO answer for stipping ANSI codes: https://stackoverflow.com/a/14693789
-def assert_before(
-    child: SpawnBase,
-    patts: list[str],
-
-    **kwargs,
-
-) -> None:
-    __tracebackhide__: bool = False
-
-    assert in_prompt_msg(
-        child=child,
-        parts=patts,
-
-        # since this is an "assert" helper ;)
-        err_on_false=True,
-        **kwargs
-    )
-
-
-def do_ctlc(
-    child,
-    count: int = 3,
-    delay: float = 0.1,
-    patt: str|None = None,
-
-    # expect repl UX to reprint the prompt after every
-    # ctrl-c send.
-    # XXX: no idea but, in CI this never seems to work even on 3.10 so
-    # needs some further investigation potentially...
-    expect_prompt: bool = not _ci_env,
-
-) -> str|None:
-
-    before: str|None = None
-
-    # make sure ctl-c sends don't do anything but repeat output
-    for _ in range(count):
-        time.sleep(delay)
-        child.sendcontrol('c')
-
-        # TODO: figure out why this makes CI fail..
-        # if you run this test manually it works just fine..
-        if expect_prompt:
-            time.sleep(delay)
-            child.expect(PROMPT)
-            before = str(child.before.decode())
-            time.sleep(delay)
-
-            if patt:
-                # should see the last line on console
-                assert patt in before
-
-    # return the console content up to the final prompt
-    return before

tests/devx/test_pause_from_non_trio.py

@@ -1,381 +0,0 @@
-'''
-That "foreign loop/thread" debug REPL support better ALSO WORK!
-
-Same as `test_native_pause.py`.
-All these tests can be understood (somewhat) by running the
-equivalent `examples/debugging/` scripts manually.
-
-'''
-from contextlib import (
-    contextmanager as cm,
-)
-# from functools import partial
-# import itertools
-import time
-# from typing import (
-#     Iterator,
-# )
-
-import pytest
-from pexpect.exceptions import (
-    TIMEOUT,
-    EOF,
-)
-
-from .conftest import (
-    # _ci_env,
-    do_ctlc,
-    PROMPT,
-    # expect,
-    in_prompt_msg,
-    assert_before,
-    _pause_msg,
-    _crash_msg,
-    _ctlc_ignore_header,
-    # _repl_fail_msg,
-)
-
-@cm
-def maybe_expect_timeout(
-    ctlc: bool = False,
-) -> None:
-    try:
-        yield
-    except TIMEOUT:
-        # breakpoint()
-        if ctlc:
-            pytest.xfail(
-                'Some kinda redic threading SIGINT bug i think?\n'
-                'See the notes in `examples/debugging/sync_bp.py`..\n'
-            )
-        raise
-
-
-@pytest.mark.ctlcs_bish
-def test_pause_from_sync(
-    spawn,
-    ctlc: bool,
-):
-    '''
-    Verify we can use the `pdbp` REPL from sync functions AND from
-    any thread spawned with `trio.to_thread.run_sync()`.
-
-    `examples/debugging/sync_bp.py`
-
-    '''
-    child = spawn('sync_bp')
-
-    # first `sync_pause()` after nurseries open
-    child.expect(PROMPT)
-    assert_before(
-        child,
-        [
-            # pre-prompt line
-            _pause_msg,
-            "<Task '__main__.main'",
-            "('root'",
-        ]
-    )
-    if ctlc:
-        do_ctlc(child)
-        # ^NOTE^ subactor not spawned yet; don't need extra delay.
-
-    child.sendline('c')
-
-    # first `await tractor.pause()` inside `p.open_context()` body
-    child.expect(PROMPT)
-
-    # XXX shouldn't see gb loaded message with PDB loglevel!
-    # assert not in_prompt_msg(
-    #     child,
-    #     ['`greenback` portal opened!'],
-    # )
-    # should be same root task
-    assert_before(
-        child,
-        [
-            _pause_msg,
-            "<Task '__main__.main'",
-            "('root'",
-        ]
-    )
-
-    if ctlc:
-        do_ctlc(
-            child,
-            # NOTE: setting this to 0 (or some other sufficient
-            # small val) can cause the test to fail since the
-            # `subactor` suffers a race where the root/parent
-            # sends an actor-cancel prior to it hitting its pause
-            # point; by def the value is 0.1
-            delay=0.4,
-        )
-
-    # XXX, fwiw without a brief sleep here the SIGINT might actually
-    # trigger "subactor" cancellation by its parent  before the
-    # shield-handler is engaged.
-    #
-    # => similar to the `delay` input to `do_ctlc()` below, setting
-    # this too low can cause the test to fail since the `subactor`
-    # suffers a race where the root/parent sends an actor-cancel
-    # prior to the context task hitting its pause point (and thus
-    # engaging the `sigint_shield()` handler in time); this value
-    # seems be good enuf?
-    time.sleep(0.6)
-
-    # one of the bg thread or subactor should have
-    # `Lock.acquire()`-ed
-    # (NOT both, which will result in REPL clobbering!)
-    attach_patts: dict[str, list[str]] = {
-        'subactor': [
-            "'start_n_sync_pause'",
-            "('subactor'",
-        ],
-        'inline_root_bg_thread': [
-            "<Thread(inline_root_bg_thread",
-            "('root'",
-        ],
-        'start_soon_root_bg_thread': [
-            "<Thread(start_soon_root_bg_thread",
-            "('root'",
-        ],
-    }
-    conts: int = 0  # for debugging below matching logic on failure
-    while attach_patts:
-        child.sendline('c')
-        conts += 1
-        child.expect(PROMPT)
-        before = str(child.before.decode())
-        for key in attach_patts:
-            if key in before:
-                attach_key: str = key
-                expected_patts: str = attach_patts.pop(key)
-                assert_before(
-                    child,
-                    [_pause_msg]
-                    +
-                    expected_patts
-                )
-                break
-        else:
-            pytest.fail(
-                f'No keys found?\n\n'
-                f'{attach_patts.keys()}\n\n'
-                f'{before}\n'
-            )
-
-        # ensure no other task/threads engaged a REPL
-        # at the same time as the one that was detected above.
-        for key, other_patts in attach_patts.copy().items():
-            assert not in_prompt_msg(
-                child,
-                other_patts,
-            )
-
-        if ctlc:
-            do_ctlc(
-                child,
-                patt=attach_key,
-                # NOTE same as comment above
-                delay=0.4,
-            )
-
-    child.sendline('c')
-
-    # XXX TODO, weird threading bug it seems despite the
-    # `abandon_on_cancel: bool` setting to
-    # `trio.to_thread.run_sync()`..
-    with maybe_expect_timeout(
-        ctlc=ctlc,
-    ):
-        child.expect(EOF)
-
-
-def expect_any_of(
-    attach_patts: dict[str, list[str]],
-    child,   # what type?
-    ctlc: bool = False,
-    prompt: str = _ctlc_ignore_header,
-    ctlc_delay: float = .4,
-
-) -> list[str]:
-    '''
-    Receive any of a `list[str]` of patterns provided in
-    `attach_patts`.
-
-    Used to test racing prompts from multiple actors and/or
-    tasks using a common root process' `pdbp` REPL.
-
-    '''
-    assert attach_patts
-
-    child.expect(PROMPT)
-    before = str(child.before.decode())
-
-    for attach_key in attach_patts:
-        if attach_key in before:
-            expected_patts: str = attach_patts.pop(attach_key)
-            assert_before(
-                child,
-                expected_patts
-            )
-            break  # from for
-    else:
-        pytest.fail(
-            f'No keys found?\n\n'
-            f'{attach_patts.keys()}\n\n'
-            f'{before}\n'
-        )
-
-    # ensure no other task/threads engaged a REPL
-    # at the same time as the one that was detected above.
-    for key, other_patts in attach_patts.copy().items():
-        assert not in_prompt_msg(
-            child,
-            other_patts,
-        )
-
-    if ctlc:
-        do_ctlc(
-            child,
-            patt=prompt,
-            # NOTE same as comment above
-            delay=ctlc_delay,
-        )
-
-    return expected_patts
-
-
-@pytest.mark.ctlcs_bish
-def test_sync_pause_from_aio_task(
-    spawn,
-
-    ctlc: bool
-    # ^TODO, fix for `asyncio`!!
-):
-    '''
-    Verify we can use the `pdbp` REPL from an `asyncio.Task` spawned using
-    APIs in `.to_asyncio`.
-
-    `examples/debugging/asycio_bp.py`
-
-    '''
-    child = spawn('asyncio_bp')
-
-    # RACE on whether trio/asyncio task bps first
-    attach_patts: dict[str, list[str]] = {
-
-        # first pause in guest-mode (aka "infecting")
-        # `trio.Task`.
-        'trio-side': [
-            _pause_msg,
-            "<Task 'trio_ctx'",
-            "('aio_daemon'",
-        ],
-
-        # `breakpoint()` from `asyncio.Task`.
-        'asyncio-side': [
-            _pause_msg,
-            "<Task pending name='Task-2' coro=<greenback_shim()",
-            "('aio_daemon'",
-        ],
-    }
-
-    while attach_patts:
-        expect_any_of(
-            attach_patts=attach_patts,
-            child=child,
-            ctlc=ctlc,
-        )
-        child.sendline('c')
-
-    # NOW in race order,
-    # - the asyncio-task will error
-    # - the root-actor parent task will pause
-    #
-    attach_patts: dict[str, list[str]] = {
-
-        # error raised in `asyncio.Task`
-        "raise ValueError('asyncio side error!')": [
-            _crash_msg,
-            "<Task 'trio_ctx'",
-            "@ ('aio_daemon'",
-            "ValueError: asyncio side error!",
-
-            # XXX, we no longer show this frame by default!
-            # 'return await chan.receive()',  # `.to_asyncio` impl internals in tb
-        ],
-
-        # parent-side propagation via actor-nursery/portal
-        # "tractor._exceptions.RemoteActorError: remote task raised a 'ValueError'": [
-        "remote task raised a 'ValueError'": [
-            _crash_msg,
-            "src_uid=('aio_daemon'",
-            "('aio_daemon'",
-        ],
-
-        # a final pause in root-actor
-        "<Task '__main__.main'": [
-            _pause_msg,
-            "<Task '__main__.main'",
-            "('root'",
-        ],
-    }
-    while attach_patts:
-        expect_any_of(
-            attach_patts=attach_patts,
-            child=child,
-            ctlc=ctlc,
-        )
-        child.sendline('c')
-
-    assert not attach_patts
-
-    # final boxed error propagates to root
-    assert_before(
-        child,
-        [
-            _crash_msg,
-            "<Task '__main__.main'",
-            "('root'",
-            "remote task raised a 'ValueError'",
-            "ValueError: asyncio side error!",
-        ]
-    )
-
-    if ctlc:
-        do_ctlc(
-            child,
-            # NOTE: setting this to 0 (or some other sufficient
-            # small val) can cause the test to fail since the
-            # `subactor` suffers a race where the root/parent
-            # sends an actor-cancel prior to it hitting its pause
-            # point; by def the value is 0.1
-            delay=0.4,
-        )
-
-    child.sendline('c')
-    # with maybe_expect_timeout():
-    child.expect(EOF)
-
-
-def test_sync_pause_from_non_greenbacked_aio_task():
-    '''
-    Where the `breakpoint()` caller task is NOT spawned by
-    `tractor.to_asyncio` and thus never activates
-    a `greenback.ensure_portal()` beforehand, presumably bc the task
-    was started by some lib/dep as in often seen in the field.
-
-    Ensure sync pausing works when the pause is in,
-
-    - the root actor running in infected-mode?
-      |_ since we don't need any IPC to acquire the debug lock?
-      |_ is there some way to handle this like the non-main-thread case?
-
-    All other cases need to error out appropriately right?
-
-    - for any subactor we can't avoid needing the repl lock..
-      |_ is there a way to hook into `asyncio.ensure_future(obj)`?
-
-    '''
-    pass

tests/devx/test_tooling.py

@@ -1,172 +0,0 @@
-'''
-That "native" runtime-hackin toolset better be dang useful!
-
-Verify the funtion of a variety of "developer-experience" tools we
-offer from the `.devx` sub-pkg:
-
-- use of the lovely `stackscope` for dumping actor `trio`-task trees
-  during operation and hangs.
-
-TODO:
-- demonstration of `CallerInfo` call stack frame filtering such that
-  for logging and REPL purposes a user sees exactly the layers needed
-  when debugging a problem inside the stack vs. in their app.
-
-'''
-import os
-import signal
-import time
-
-from .conftest import (
-    expect,
-    assert_before,
-    in_prompt_msg,
-    PROMPT,
-    _pause_msg,
-)
-from pexpect.exceptions import (
-    # TIMEOUT,
-    EOF,
-)
-
-
-def test_shield_pause(
-    spawn,
-):
-    '''
-    Verify the `tractor.pause()/.post_mortem()` API works inside an
-    already cancelled `trio.CancelScope` and that you can step to the
-    next checkpoint wherein the cancelled will get raised.
-
-    '''
-    child = spawn(
-        'shield_hang_in_sub'
-    )
-    expect(
-        child,
-        'Yo my child hanging..?',
-    )
-    assert_before(
-        child,
-        [
-            'Entering shield sleep..',
-            'Enabling trace-trees on `SIGUSR1` since `stackscope` is installed @',
-        ]
-    )
-
-    script_pid: int = child.pid
-    print(
-        f'Sending SIGUSR1 to {script_pid}\n'
-        f'(kill -s SIGUSR1 {script_pid})\n'
-    )
-    os.kill(
-        script_pid,
-        signal.SIGUSR1,
-    )
-    time.sleep(0.2)
-    expect(
-        child,
-        # end-of-tree delimiter
-        "end-of-\('root'",
-    )
-    assert_before(
-        child,
-        [
-            # 'Srying to dump `stackscope` tree..',
-            # 'Dumping `stackscope` tree for actor',
-            "('root'",  # uid line
-
-            # TODO!? this used to show?
-            # -[ ] mk reproducable for @oremanj?
-            #
-            # parent block point (non-shielded)
-            # 'await trio.sleep_forever()  # in root',
-        ]
-    )
-    expect(
-        child,
-        # end-of-tree delimiter
-        "end-of-\('hanger'",
-    )
-    assert_before(
-        child,
-        [
-            # relay to the sub should be reported
-            'Relaying `SIGUSR1`[10] to sub-actor',
-
-            "('hanger'",  # uid line
-
-            # TODO!? SEE ABOVE
-            # hanger LOC where it's shield-halted
-            # 'await trio.sleep_forever()  # in subactor',
-        ]
-    )
-
-    # simulate the user sending a ctl-c to the hanging program.
-    # this should result in the terminator kicking in since
-    # the sub is shield blocking and can't respond to SIGINT.
-    os.kill(
-        child.pid,
-        signal.SIGINT,
-    )
-    expect(
-        child,
-        'Shutting down actor runtime',
-        timeout=6,
-    )
-    assert_before(
-        child,
-        [
-            'raise KeyboardInterrupt',
-            # 'Shutting down actor runtime',
-            '#T-800 deployed to collect zombie B0',
-            "'--uid', \"('hanger',",
-        ]
-    )
-
-
-def test_breakpoint_hook_restored(
-    spawn,
-):
-    '''
-    Ensures our actor runtime sets a custom `breakpoint()` hook
-    on open then restores the stdlib's default on close.
-
-    The hook state validation is done via `assert`s inside the
-    invoked script with only `breakpoint()` (not `tractor.pause()`)
-    calls used.
-
-    '''
-    child = spawn('restore_builtin_breakpoint')
-
-    child.expect(PROMPT)
-    assert_before(
-        child,
-        [
-            _pause_msg,
-            "<Task '__main__.main'",
-            "('root'",
-            "first bp, tractor hook set",
-        ]
-    )
-    child.sendline('c')
-    child.expect(PROMPT)
-    assert_before(
-        child,
-        [
-            "last bp, stdlib hook restored",
-        ]
-    )
-
-    # since the stdlib hook was already restored there should be NO
-    # `tractor` `log.pdb()` content from console!
-    assert not in_prompt_msg(
-        child,
-        [
-            _pause_msg,
-            "<Task '__main__.main'",
-            "('root'",
-        ],
-    )
-    child.sendline('c')
-    child.expect(EOF)

tests/test_advanced_faults.py

@@ -3,6 +3,7 @@ Sketchy network blackoutz, ugly byzantine gens, puedes eschuchar la
 cancelacion?..
 
 '''
+import itertools
 from functools import partial
 from types import ModuleType
 
@@ -229,10 +230,13 @@ def test_ipc_channel_break_during_stream(
     # get raw instance from pytest wrapper
     value = excinfo.value
     if isinstance(value, ExceptionGroup):
-        excs = value.exceptions
+        value = next(
-        assert len(excs) == 1
+            itertools.dropwhile(
-        final_exc = excs[0]
+                lambda exc: not isinstance(exc, expect_final_exc),
-        assert isinstance(final_exc, expect_final_exc)
+                value.exceptions,
+            )
+        )
+        assert value
 
 
 @tractor.context
@@ -255,16 +259,15 @@ async def break_ipc_after_started(
 
 def test_stream_closed_right_after_ipc_break_and_zombie_lord_engages():
     '''
-    Verify that is a subactor's IPC goes down just after bringing up
+    Verify that is a subactor's IPC goes down just after bringing up a stream
-    a stream the parent can trigger a SIGINT and the child will be
+    the parent can trigger a SIGINT and the child will be reaped out-of-IPC by
-    reaped out-of-IPC by the localhost process supervision machinery:
+    the localhost process supervision machinery: aka "zombie lord".
-    aka "zombie lord".
 
     '''
     async def main():
         with trio.fail_after(3):
-            async with tractor.open_nursery() as an:
+            async with tractor.open_nursery() as n:
-                portal = await an.start_actor(
+                portal = await n.start_actor(
                     'ipc_breaker',
                     enable_modules=[__name__],
                 )

tests/test_advanced_streaming.py

@@ -307,15 +307,7 @@ async def inf_streamer(
 
     async with (
         ctx.open_stream() as stream,
-
+        trio.open_nursery() as tn,
-        # XXX TODO, INTERESTING CASE!!
-        # - if we don't collapse the eg then the embedded
-        # `trio.EndOfChannel` doesn't propagate directly to the above
-        # .open_stream() parent, resulting in it also raising instead
-        # of gracefully absorbing as normal.. so how to handle?
-        trio.open_nursery(
-            strict_exception_groups=False,
-        ) as tn,
     ):
         async def close_stream_on_sentinel():
             async for msg in stream:

tests/test_cancellation.py

@@ -130,7 +130,7 @@ def test_multierror(
             try:
                 await portal2.result()
             except tractor.RemoteActorError as err:
-                assert err.boxed_type is AssertionError
+                assert err.boxed_type == AssertionError
                 print("Look Maa that first actor failed hard, hehh")
                 raise
 
@@ -182,7 +182,7 @@ def test_multierror_fast_nursery(reg_addr, start_method, num_subactors, delay):
 
     for exc in exceptions:
         assert isinstance(exc, tractor.RemoteActorError)
-        assert exc.boxed_type is AssertionError
+        assert exc.boxed_type == AssertionError
 
 
 async def do_nothing():
@@ -504,9 +504,7 @@ def test_cancel_via_SIGINT_other_task(
     if is_win():  # smh
         timeout += 1
 
-    async def spawn_and_sleep_forever(
+    async def spawn_and_sleep_forever(task_status=trio.TASK_STATUS_IGNORED):
-        task_status=trio.TASK_STATUS_IGNORED
-    ):
         async with tractor.open_nursery() as tn:
             for i in range(3):
                 await tn.run_in_actor(
@@ -519,9 +517,7 @@ def test_cancel_via_SIGINT_other_task(
     async def main():
         # should never timeout since SIGINT should cancel the current program
         with trio.fail_after(timeout):
-            async with trio.open_nursery(
+            async with trio.open_nursery() as n:
-                strict_exception_groups=False,
-            ) as n:
                 await n.start(spawn_and_sleep_forever)
                 if 'mp' in spawn_backend:
                     time.sleep(0.1)
@@ -614,12 +610,6 @@ def test_fast_graceful_cancel_when_spawn_task_in_soft_proc_wait_for_daemon(
                     nurse.start_soon(delayed_kbi)
 
                     await p.run(do_nuthin)
-
-        # need to explicitly re-raise the lone kbi..now
-        except* KeyboardInterrupt as kbi_eg:
-            assert (len(excs := kbi_eg.exceptions) == 1)
-            raise excs[0]
-
         finally:
             duration = time.time() - start
             if duration > timeout:

tests/test_caps_based_msging.py

@@ -0,0 +1,917 @@
+'''
+Low-level functional audits for our
+"capability based messaging"-spec feats.
+
+B~)
+
+'''
+import typing
+from typing import (
+    Any,
+    Type,
+    Union,
+)
+
+from msgspec import (
+    structs,
+    msgpack,
+    Struct,
+    ValidationError,
+)
+import pytest
+
+import tractor
+from tractor import (
+    _state,
+    MsgTypeError,
+    Context,
+)
+from tractor.msg import (
+    _codec,
+    _ctxvar_MsgCodec,
+
+    NamespacePath,
+    MsgCodec,
+    mk_codec,
+    apply_codec,
+    current_codec,
+)
+from tractor.msg.types import (
+    _payload_msgs,
+    log,
+    PayloadMsg,
+    Started,
+    mk_msg_spec,
+)
+import trio
+
+
+def mk_custom_codec(
+    pld_spec: Union[Type]|Any,
+    add_hooks: bool,
+
+) -> MsgCodec:
+    '''
+    Create custom `msgpack` enc/dec-hooks and set a `Decoder`
+    which only loads `pld_spec` (like `NamespacePath`) types.
+
+    '''
+    uid: tuple[str, str] = tractor.current_actor().uid
+
+    # XXX NOTE XXX: despite defining `NamespacePath` as a type
+    # field on our `PayloadMsg.pld`, we still need a enc/dec_hook() pair
+    # to cast to/from that type on the wire. See the docs:
+    # https://jcristharif.com/msgspec/extending.html#mapping-to-from-native-types
+
+    def enc_nsp(obj: Any) -> Any:
+        print(f'{uid} ENC HOOK')
+        match obj:
+            case NamespacePath():
+                print(
+                    f'{uid}: `NamespacePath`-Only ENCODE?\n'
+                    f'obj-> `{obj}`: {type(obj)}\n'
+                )
+                # if type(obj) != NamespacePath:
+                #     breakpoint()
+                return str(obj)
+
+        print(
+            f'{uid}\n'
+            'CUSTOM ENCODE\n'
+            f'obj-arg-> `{obj}`: {type(obj)}\n'
+        )
+        logmsg: str = (
+            f'{uid}\n'
+            'FAILED ENCODE\n'
+            f'obj-> `{obj}: {type(obj)}`\n'
+        )
+        raise NotImplementedError(logmsg)
+
+    def dec_nsp(
+        obj_type: Type,
+        obj: Any,
+
+    ) -> Any:
+        print(
+            f'{uid}\n'
+            'CUSTOM DECODE\n'
+            f'type-arg-> {obj_type}\n'
+            f'obj-arg-> `{obj}`: {type(obj)}\n'
+        )
+        nsp = None
+
+        if (
+            obj_type is NamespacePath
+            and isinstance(obj, str)
+            and ':' in obj
+        ):
+            nsp = NamespacePath(obj)
+            # TODO: we could built a generic handler using
+            # JUST matching the obj_type part?
+            # nsp = obj_type(obj)
+
+        if nsp:
+            print(f'Returning NSP instance: {nsp}')
+            return nsp
+
+        logmsg: str = (
+            f'{uid}\n'
+            'FAILED DECODE\n'
+            f'type-> {obj_type}\n'
+            f'obj-arg-> `{obj}`: {type(obj)}\n\n'
+            f'current codec:\n'
+            f'{current_codec()}\n'
+        )
+        # TODO: figure out the ignore subsys for this!
+        # -[ ] option whether to defense-relay backc the msg
+        #   inside an `Invalid`/`Ignore`
+        # -[ ] how to make this handling pluggable such that a
+        #   `Channel`/`MsgTransport` can intercept and process
+        #   back msgs either via exception handling or some other
+        #   signal?
+        log.warning(logmsg)
+        # NOTE: this delivers the invalid
+        # value up to `msgspec`'s decoding
+        # machinery for error raising.
+        return obj
+        # raise NotImplementedError(logmsg)
+
+    nsp_codec: MsgCodec = mk_codec(
+        ipc_pld_spec=pld_spec,
+
+        # NOTE XXX: the encode hook MUST be used no matter what since
+        # our `NamespacePath` is not any of a `Any` native type nor
+        # a `msgspec.Struct` subtype - so `msgspec` has no way to know
+        # how to encode it unless we provide the custom hook.
+        #
+        # AGAIN that is, regardless of whether we spec an
+        # `Any`-decoded-pld the enc has no knowledge (by default)
+        # how to enc `NamespacePath` (nsp), so we add a custom
+        # hook to do that ALWAYS.
+        enc_hook=enc_nsp if add_hooks else None,
+
+        # XXX NOTE: pretty sure this is mutex with the `type=` to
+        # `Decoder`? so it won't work in tandem with the
+        # `ipc_pld_spec` passed above?
+        dec_hook=dec_nsp if add_hooks else None,
+    )
+    return nsp_codec
+
+
+def chk_codec_applied(
+    expect_codec: MsgCodec,
+    enter_value: MsgCodec|None = None,
+
+) -> MsgCodec:
+    '''
+    buncha sanity checks ensuring that the IPC channel's
+    context-vars are set to the expected codec and that are
+    ctx-var wrapper APIs match the same.
+
+    '''
+    # TODO: play with tricyle again, bc this is supposed to work
+    # the way we want?
+    #
+    # TreeVar
+    # task: trio.Task = trio.lowlevel.current_task()
+    # curr_codec = _ctxvar_MsgCodec.get_in(task)
+
+    # ContextVar
+    # task_ctx: Context = task.context
+    # assert _ctxvar_MsgCodec in task_ctx
+    # curr_codec: MsgCodec = task.context[_ctxvar_MsgCodec]
+
+    # NOTE: currently we use this!
+    # RunVar
+    curr_codec: MsgCodec = current_codec()
+    last_read_codec = _ctxvar_MsgCodec.get()
+    # assert curr_codec is last_read_codec
+
+    assert (
+        (same_codec := expect_codec) is
+        # returned from `mk_codec()`
+
+        # yielded value from `apply_codec()`
+
+        # read from current task's `contextvars.Context`
+        curr_codec is
+        last_read_codec
+
+        # the default `msgspec` settings
+        is not _codec._def_msgspec_codec
+        is not _codec._def_tractor_codec
+    )
+
+    if enter_value:
+        enter_value is same_codec
+
+
+def iter_maybe_sends(
+    send_items: dict[Union[Type], Any] | list[tuple],
+    ipc_pld_spec: Union[Type] | Any,
+    add_codec_hooks: bool,
+
+    codec: MsgCodec|None = None,
+
+) -> tuple[Any, bool]:
+
+    if isinstance(send_items, dict):
+        send_items = send_items.items()
+
+    for (
+        send_type_spec,
+        send_value,
+    ) in send_items:
+
+        expect_roundtrip: bool = False
+
+        # values-to-typespec santiy
+        send_type = type(send_value)
+        assert send_type == send_type_spec or (
+            (subtypes := getattr(send_type_spec, '__args__', None))
+            and send_type in subtypes
+        )
+
+        spec_subtypes: set[Union[Type]] = (
+             getattr(
+                 ipc_pld_spec,
+                 '__args__',
+                 {ipc_pld_spec,},
+             )
+        )
+        send_in_spec: bool = (
+            send_type == ipc_pld_spec
+            or (
+                ipc_pld_spec != Any
+                and  # presume `Union` of types
+                send_type in spec_subtypes
+            )
+            or (
+                ipc_pld_spec == Any
+                and
+                send_type != NamespacePath
+            )
+        )
+        expect_roundtrip = (
+            send_in_spec
+            # any spec should support all other
+            # builtin py values that we send
+            # except our custom nsp type which
+            # we should be able to send as long
+            # as we provide the custom codec hooks.
+            or (
+                ipc_pld_spec == Any
+                and
+                send_type == NamespacePath
+                and
+                add_codec_hooks
+            )
+        )
+
+        if codec is not None:
+            # XXX FIRST XXX ensure roundtripping works
+            # before touching any IPC primitives/APIs.
+            wire_bytes: bytes = codec.encode(
+                Started(
+                    cid='blahblah',
+                    pld=send_value,
+                )
+            )
+            # NOTE: demonstrates the decoder loading
+            # to via our native SCIPP msg-spec
+            # (structurred-conc-inter-proc-protocol)
+            # implemented as per,
+            try:
+                msg: Started = codec.decode(wire_bytes)
+                if not expect_roundtrip:
+                    pytest.fail(
+                        f'NOT-EXPECTED able to roundtrip value given spec:\n'
+                        f'ipc_pld_spec -> {ipc_pld_spec}\n'
+                        f'value -> {send_value}: {send_type}\n'
+                    )
+
+                pld = msg.pld
+                assert pld == send_value
+
+            except ValidationError:
+                if expect_roundtrip:
+                    pytest.fail(
+                        f'EXPECTED to roundtrip value given spec:\n'
+                        f'ipc_pld_spec -> {ipc_pld_spec}\n'
+                        f'value -> {send_value}: {send_type}\n'
+                    )
+
+        yield (
+            str(send_type),
+            send_value,
+            expect_roundtrip,
+        )
+
+
+def dec_type_union(
+    type_names: list[str],
+) -> Type:
+    '''
+    Look up types by name, compile into a list and then create and
+    return a `typing.Union` from the full set.
+
+    '''
+    import importlib
+    types: list[Type] = []
+    for type_name in type_names:
+        for mod in [
+            typing,
+            importlib.import_module(__name__),
+        ]:
+            if type_ref := getattr(
+                mod,
+                type_name,
+                False,
+            ):
+                types.append(type_ref)
+
+    # special case handling only..
+    # ipc_pld_spec: Union[Type] = eval(
+    #     pld_spec_str,
+    #     {},  # globals
+    #     {'typing': typing},  # locals
+    # )
+
+    return Union[*types]
+
+
+def enc_type_union(
+    union_or_type: Union[Type]|Type,
+) -> list[str]:
+    '''
+    Encode a type-union or single type to a list of type-name-strings
+    ready for IPC interchange.
+
+    '''
+    type_strs: list[str] = []
+    for typ in getattr(
+        union_or_type,
+        '__args__',
+        {union_or_type,},
+    ):
+        type_strs.append(typ.__qualname__)
+
+    return type_strs
+
+
+@tractor.context
+async def send_back_values(
+    ctx: Context,
+    expect_debug: bool,
+    pld_spec_type_strs: list[str],
+    add_hooks: bool,
+    started_msg_bytes: bytes,
+    expect_ipc_send: dict[str, tuple[Any, bool]],
+
+) -> None:
+    '''
+    Setup up a custom codec to load instances of `NamespacePath`
+    and ensure we can round trip a func ref with our parent.
+
+    '''
+    uid: tuple = tractor.current_actor().uid
+
+    # debug mode sanity check (prolly superfluous but, meh)
+    assert expect_debug == _state.debug_mode()
+
+    # init state in sub-actor should be default
+    chk_codec_applied(
+        expect_codec=_codec._def_tractor_codec,
+    )
+
+    # load pld spec from input str
+    ipc_pld_spec = dec_type_union(
+        pld_spec_type_strs,
+    )
+    pld_spec_str = str(ipc_pld_spec)
+
+    # same as on parent side config.
+    nsp_codec: MsgCodec = mk_custom_codec(
+        pld_spec=ipc_pld_spec,
+        add_hooks=add_hooks,
+    )
+    with (
+        apply_codec(nsp_codec) as codec,
+    ):
+        chk_codec_applied(
+            expect_codec=nsp_codec,
+            enter_value=codec,
+        )
+
+        print(
+            f'{uid}: attempting `Started`-bytes DECODE..\n'
+        )
+        try:
+            msg: Started = nsp_codec.decode(started_msg_bytes)
+            expected_pld_spec_str: str = msg.pld
+            assert pld_spec_str == expected_pld_spec_str
+
+        # TODO: maybe we should add our own wrapper error so as to
+        # be interchange-lib agnostic?
+        # -[ ] the error type is wtv is raised from the hook so we
+        #   could also require a type-class of errors for
+        #   indicating whether the hook-failure can be handled by
+        #   a nasty-dialog-unprot sub-sys?
+        except ValidationError:
+
+            # NOTE: only in the `Any` spec case do we expect this to
+            # work since otherwise no spec covers a plain-ol'
+            # `.pld: str`
+            if pld_spec_str == 'Any':
+                raise
+            else:
+                print(
+                    f'{uid}: (correctly) unable to DECODE `Started`-bytes\n'
+                    f'{started_msg_bytes}\n'
+                )
+
+        iter_send_val_items = iter(expect_ipc_send.values())
+        sent: list[Any] = []
+        for send_value, expect_send in iter_send_val_items:
+            try:
+                print(
+                    f'{uid}: attempting to `.started({send_value})`\n'
+                    f'=> expect_send: {expect_send}\n'
+                    f'SINCE, ipc_pld_spec: {ipc_pld_spec}\n'
+                    f'AND, codec: {codec}\n'
+                )
+                await ctx.started(send_value)
+                sent.append(send_value)
+                if not expect_send:
+
+                    # XXX NOTE XXX THIS WON'T WORK WITHOUT SPECIAL
+                    # `str` handling! or special debug mode IPC
+                    # msgs!
+                    await tractor.pause()
+
+                    raise RuntimeError(
+                        f'NOT-EXPECTED able to roundtrip value given spec:\n'
+                        f'ipc_pld_spec -> {ipc_pld_spec}\n'
+                        f'value -> {send_value}: {type(send_value)}\n'
+                    )
+
+                break  # move on to streaming block..
+
+            except tractor.MsgTypeError:
+                await tractor.pause()
+
+                if expect_send:
+                    raise RuntimeError(
+                        f'EXPECTED to `.started()` value given spec:\n'
+                        f'ipc_pld_spec -> {ipc_pld_spec}\n'
+                        f'value -> {send_value}: {type(send_value)}\n'
+                    )
+
+        async with ctx.open_stream() as ipc:
+            print(
+                f'{uid}: Entering streaming block to send remaining values..'
+            )
+
+            for send_value, expect_send in iter_send_val_items:
+                send_type: Type = type(send_value)
+                print(
+                    '------ - ------\n'
+                    f'{uid}: SENDING NEXT VALUE\n'
+                    f'ipc_pld_spec: {ipc_pld_spec}\n'
+                    f'expect_send: {expect_send}\n'
+                    f'val: {send_value}\n'
+                    '------ - ------\n'
+                )
+                try:
+                    await ipc.send(send_value)
+                    print(f'***\n{uid}-CHILD sent {send_value!r}\n***\n')
+                    sent.append(send_value)
+
+                    # NOTE: should only raise above on
+                    # `.started()` or a `Return`
+                    # if not expect_send:
+                    #     raise RuntimeError(
+                    #         f'NOT-EXPECTED able to roundtrip value given spec:\n'
+                    #         f'ipc_pld_spec -> {ipc_pld_spec}\n'
+                    #         f'value -> {send_value}: {send_type}\n'
+                    #     )
+
+                except ValidationError:
+                    print(f'{uid} FAILED TO SEND {send_value}!')
+
+                    # await tractor.pause()
+                    if expect_send:
+                        raise RuntimeError(
+                            f'EXPECTED to roundtrip value given spec:\n'
+                            f'ipc_pld_spec -> {ipc_pld_spec}\n'
+                            f'value -> {send_value}: {send_type}\n'
+                        )
+                    # continue
+
+            else:
+                print(
+                    f'{uid}: finished sending all values\n'
+                    'Should be exiting stream block!\n'
+                )
+
+        print(f'{uid}: exited streaming block!')
+
+        # TODO: this won't be true bc in streaming phase we DO NOT
+        # msgspec check outbound msgs!
+        # -[ ] once we implement the receiver side `InvalidMsg`
+        #   then we can expect it here?
+        # assert (
+        #     len(sent)
+        #     ==
+        #     len([val
+        #          for val, expect in
+        #          expect_ipc_send.values()
+        #          if expect is True])
+        # )
+
+
+def ex_func(*args):
+    print(f'ex_func({args})')
+
+
+@pytest.mark.parametrize(
+    'ipc_pld_spec',
+    [
+        Any,
+        NamespacePath,
+        NamespacePath|None,  # the "maybe" spec Bo
+    ],
+    ids=[
+        'any_type',
+        'nsp_type',
+        'maybe_nsp_type',
+    ]
+)
+@pytest.mark.parametrize(
+    'add_codec_hooks',
+    [
+        True,
+        False,
+    ],
+    ids=['use_codec_hooks', 'no_codec_hooks'],
+)
+def test_codec_hooks_mod(
+    debug_mode: bool,
+    ipc_pld_spec: Union[Type]|Any,
+    # send_value: None|str|NamespacePath,
+    add_codec_hooks: bool,
+):
+    '''
+    Audit the `.msg.MsgCodec` override apis details given our impl
+    uses `contextvars` to accomplish per `trio` task codec
+    application around an inter-proc-task-comms context.
+
+    '''
+    async def main():
+        nsp = NamespacePath.from_ref(ex_func)
+        send_items: dict[Union, Any] = {
+            Union[None]: None,
+            Union[NamespacePath]: nsp,
+            Union[str]: str(nsp),
+        }
+
+        # init default state for actor
+        chk_codec_applied(
+            expect_codec=_codec._def_tractor_codec,
+        )
+
+        async with tractor.open_nursery(
+            debug_mode=debug_mode,
+        ) as an:
+            p: tractor.Portal = await an.start_actor(
+                'sub',
+                enable_modules=[__name__],
+            )
+
+            # TODO: 2 cases:
+            # - codec not modified -> decode nsp as `str`
+            # - codec modified with hooks -> decode nsp as
+            #   `NamespacePath`
+            nsp_codec: MsgCodec = mk_custom_codec(
+                pld_spec=ipc_pld_spec,
+                add_hooks=add_codec_hooks,
+            )
+            with apply_codec(nsp_codec) as codec:
+                chk_codec_applied(
+                    expect_codec=nsp_codec,
+                    enter_value=codec,
+                )
+
+                expect_ipc_send: dict[str, tuple[Any, bool]] = {}
+
+                report: str = (
+                    'Parent report on send values with\n'
+                    f'ipc_pld_spec: {ipc_pld_spec}\n'
+                    '       ------ - ------\n'
+                )
+                for val_type_str, val, expect_send in iter_maybe_sends(
+                    send_items,
+                    ipc_pld_spec,
+                    add_codec_hooks=add_codec_hooks,
+                ):
+                    report += (
+                        f'send_value: {val}: {type(val)} '
+                        f'=> expect_send: {expect_send}\n'
+                    )
+                    expect_ipc_send[val_type_str] = (val, expect_send)
+
+                print(
+                    report +
+                    '       ------ - ------\n'
+                )
+                assert len(expect_ipc_send) == len(send_items)
+                # now try over real IPC with a the subactor
+                # expect_ipc_rountrip: bool = True
+                expected_started = Started(
+                    cid='cid',
+                    pld=str(ipc_pld_spec),
+                )
+                # build list of values we expect to receive from
+                # the subactor.
+                expect_to_send: list[Any] = [
+                    val
+                    for val, expect_send in expect_ipc_send.values()
+                    if expect_send
+                ]
+
+                pld_spec_type_strs: list[str] = enc_type_union(ipc_pld_spec)
+
+                # XXX should raise an mte (`MsgTypeError`)
+                # when `add_codec_hooks == False` bc the input
+                # `expect_ipc_send` kwarg has a nsp which can't be
+                # serialized!
+                #
+                # TODO:can we ensure this happens from the
+                # `Return`-side (aka the sub) as well?
+                if not add_codec_hooks:
+                    try:
+                        async with p.open_context(
+                            send_back_values,
+                            expect_debug=debug_mode,
+                            pld_spec_type_strs=pld_spec_type_strs,
+                            add_hooks=add_codec_hooks,
+                            started_msg_bytes=nsp_codec.encode(expected_started),
+
+                            # XXX NOTE bc we send a `NamespacePath` in this kwarg
+                            expect_ipc_send=expect_ipc_send,
+
+                        ) as (ctx, first):
+                            pytest.fail('ctx should fail to open without custom enc_hook!?')
+
+                    # this test passes bc we can go no further!
+                    except MsgTypeError:
+                        # teardown nursery
+                        await p.cancel_actor()
+                        return
+
+                # TODO: send the original nsp here and
+                # test with `limit_msg_spec()` above?
+                # await tractor.pause()
+                print('PARENT opening IPC ctx!\n')
+                async with (
+
+                    # XXX should raise an mte (`MsgTypeError`)
+                    # when `add_codec_hooks == False`..
+                    p.open_context(
+                        send_back_values,
+                        expect_debug=debug_mode,
+                        pld_spec_type_strs=pld_spec_type_strs,
+                        add_hooks=add_codec_hooks,
+                        started_msg_bytes=nsp_codec.encode(expected_started),
+                        expect_ipc_send=expect_ipc_send,
+                    ) as (ctx, first),
+
+                    ctx.open_stream() as ipc,
+                ):
+                    # ensure codec is still applied across
+                    # `tractor.Context` + its embedded nursery.
+                    chk_codec_applied(
+                        expect_codec=nsp_codec,
+                        enter_value=codec,
+                    )
+                    print(
+                        'root: ENTERING CONTEXT BLOCK\n'
+                        f'type(first): {type(first)}\n'
+                        f'first: {first}\n'
+                    )
+                    expect_to_send.remove(first)
+
+                    # TODO: explicit values we expect depending on
+                    # codec config!
+                    # assert first == first_val
+                    # assert first == f'{__name__}:ex_func'
+
+                    async for next_sent in ipc:
+                        print(
+                            'Parent: child sent next value\n'
+                            f'{next_sent}: {type(next_sent)}\n'
+                        )
+                        if expect_to_send:
+                            expect_to_send.remove(next_sent)
+                        else:
+                            print('PARENT should terminate stream loop + block!')
+
+                    # all sent values should have arrived!
+                    assert not expect_to_send
+
+            await p.cancel_actor()
+
+    trio.run(main)
+
+
+def chk_pld_type(
+    payload_spec: Type[Struct]|Any,
+    pld: Any,
+
+    expect_roundtrip: bool|None = None,
+
+) -> bool:
+
+    pld_val_type: Type = type(pld)
+
+    # TODO: verify that the overridden subtypes
+    # DO NOT have modified type-annots from original!
+    # 'Start',  .pld: FuncSpec
+    # 'StartAck',  .pld: IpcCtxSpec
+    # 'Stop',  .pld: UNSEt
+    # 'Error',  .pld: ErrorData
+
+    codec: MsgCodec = mk_codec(
+        # NOTE: this ONLY accepts `PayloadMsg.pld` fields of a specified
+        # type union.
+        ipc_pld_spec=payload_spec,
+    )
+
+    # make a one-off dec to compare with our `MsgCodec` instance
+    # which does the below `mk_msg_spec()` call internally
+    ipc_msg_spec: Union[Type[Struct]]
+    msg_types: list[PayloadMsg[payload_spec]]
+    (
+        ipc_msg_spec,
+        msg_types,
+    ) = mk_msg_spec(
+        payload_type_union=payload_spec,
+    )
+    _enc = msgpack.Encoder()
+    _dec = msgpack.Decoder(
+        type=ipc_msg_spec or Any,  # like `PayloadMsg[Any]`
+    )
+
+    assert (
+        payload_spec
+        ==
+        codec.pld_spec
+    )
+
+    # assert codec.dec == dec
+    #
+    # ^-XXX-^ not sure why these aren't "equal" but when cast
+    # to `str` they seem to match ?? .. kk
+
+    assert (
+        str(ipc_msg_spec)
+        ==
+        str(codec.msg_spec)
+        ==
+        str(_dec.type)
+        ==
+        str(codec.dec.type)
+    )
+
+    # verify the boxed-type for all variable payload-type msgs.
+    if not msg_types:
+        breakpoint()
+
+    roundtrip: bool|None = None
+    pld_spec_msg_names: list[str] = [
+        td.__name__ for td in _payload_msgs
+    ]
+    for typedef in msg_types:
+
+        skip_runtime_msg: bool = typedef.__name__ not in pld_spec_msg_names
+        if skip_runtime_msg:
+            continue
+
+        pld_field = structs.fields(typedef)[1]
+        assert pld_field.type is payload_spec # TODO-^ does this need to work to get all subtypes to adhere?
+
+        kwargs: dict[str, Any] = {
+            'cid': '666',
+            'pld': pld,
+        }
+        enc_msg: PayloadMsg = typedef(**kwargs)
+
+        _wire_bytes: bytes = _enc.encode(enc_msg)
+        wire_bytes: bytes = codec.enc.encode(enc_msg)
+        assert _wire_bytes == wire_bytes
+
+        ve: ValidationError|None = None
+        try:
+            dec_msg = codec.dec.decode(wire_bytes)
+            _dec_msg = _dec.decode(wire_bytes)
+
+            # decoded msg and thus payload should be exactly same!
+            assert (roundtrip := (
+                _dec_msg
+                ==
+                dec_msg
+                ==
+                enc_msg
+            ))
+
+            if (
+                expect_roundtrip is not None
+                and expect_roundtrip != roundtrip
+            ):
+                breakpoint()
+
+            assert (
+                pld
+                ==
+                dec_msg.pld
+                ==
+                enc_msg.pld
+            )
+            # assert (roundtrip := (_dec_msg == enc_msg))
+
+        except ValidationError as _ve:
+            ve = _ve
+            roundtrip: bool = False
+            if pld_val_type is payload_spec:
+                raise ValueError(
+                   'Got `ValidationError` despite type-var match!?\n'
+                    f'pld_val_type: {pld_val_type}\n'
+                    f'payload_type: {payload_spec}\n'
+                ) from ve
+
+            else:
+                # ow we good cuz the pld spec mismatched.
+                print(
+                    'Got expected `ValidationError` since,\n'
+                    f'{pld_val_type} is not {payload_spec}\n'
+                )
+        else:
+            if (
+                payload_spec is not Any
+                and
+                pld_val_type is not payload_spec
+            ):
+                raise ValueError(
+                   'DID NOT `ValidationError` despite expected type match!?\n'
+                    f'pld_val_type: {pld_val_type}\n'
+                    f'payload_type: {payload_spec}\n'
+                )
+
+    # full code decode should always be attempted!
+    if roundtrip is None:
+        breakpoint()
+
+    return roundtrip
+
+
+def test_limit_msgspec():
+
+    async def main():
+        async with tractor.open_root_actor(
+            debug_mode=True
+        ):
+
+            # ensure we can round-trip a boxing `PayloadMsg`
+            assert chk_pld_type(
+                payload_spec=Any,
+                pld=None,
+                expect_roundtrip=True,
+            )
+
+            # verify that a mis-typed payload value won't decode
+            assert not chk_pld_type(
+                payload_spec=int,
+                pld='doggy',
+            )
+
+            # parametrize the boxed `.pld` type as a custom-struct
+            # and ensure that parametrization propagates
+            # to all payload-msg-spec-able subtypes!
+            class CustomPayload(Struct):
+                name: str
+                value: Any
+
+            assert not chk_pld_type(
+                payload_spec=CustomPayload,
+                pld='doggy',
+            )
+
+            assert chk_pld_type(
+                payload_spec=CustomPayload,
+                pld=CustomPayload(name='doggy', value='urmom')
+            )
+
+            # yah, we can `.pause_from_sync()` now!
+            # breakpoint()
+
+    trio.run(main)

tests/test_child_manages_service_nursery.py

@@ -95,8 +95,8 @@ async def trio_main(
 
     # stash a "service nursery" as "actor local" (aka a Python global)
     global _nursery
-    tn = _nursery
+    n = _nursery
-    assert tn
+    assert n
 
     async def consume_stream():
         async with wrapper_mngr() as stream:
@@ -104,10 +104,10 @@ async def trio_main(
                 print(msg)
 
     # run 2 tasks to ensure broadcaster chan use
-    tn.start_soon(consume_stream)
+    n.start_soon(consume_stream)
-    tn.start_soon(consume_stream)
+    n.start_soon(consume_stream)
 
-    tn.start_soon(trio_sleep_and_err)
+    n.start_soon(trio_sleep_and_err)
 
     await trio.sleep_forever()
 
@@ -117,10 +117,8 @@ async def open_actor_local_nursery(
     ctx: tractor.Context,
 ):
     global _nursery
-    async with trio.open_nursery(
+    async with trio.open_nursery() as n:
-        strict_exception_groups=False,
+        _nursery = n
-    ) as tn:
-        _nursery = tn
         await ctx.started()
         await trio.sleep(10)
         # await trio.sleep(1)
@@ -134,7 +132,7 @@ async def open_actor_local_nursery(
         # never yields back.. aka a scenario where the
         # ``tractor.context`` task IS NOT in the service n's cancel
         # scope.
-        tn.cancel_scope.cancel()
+        n.cancel_scope.cancel()
 
 
 @pytest.mark.parametrize(
@@ -159,7 +157,7 @@ def test_actor_managed_trio_nursery_task_error_cancels_aio(
         async with tractor.open_nursery() as n:
             p = await n.start_actor(
                 'nursery_mngr',
-                infect_asyncio=asyncio_mode,  # TODO, is this enabling debug mode?
+                infect_asyncio=asyncio_mode,
                 enable_modules=[__name__],
             )
             async with (

tests/test_context_stream_semantics.py

@@ -38,9 +38,9 @@ from tractor._testing import (
 # - standard setup/teardown:
 #   ``Portal.open_context()`` starts a new
 #   remote task context in another actor. The target actor's task must
-#   call ``Context.started()`` to unblock this entry on the parent side.
+#   call ``Context.started()`` to unblock this entry on the caller side.
-#   the child task executes until complete and returns a final value
+#   the callee task executes until complete and returns a final value
-#   which is delivered to the parent side and retreived via
+#   which is delivered to the caller side and retreived via
 #   ``Context.result()``.
 
 # - cancel termination:
@@ -170,9 +170,9 @@ async def assert_state(value: bool):
     [False, ValueError, KeyboardInterrupt],
 )
 @pytest.mark.parametrize(
-    'child_blocks_forever',
+    'callee_blocks_forever',
     [False, True],
-    ids=lambda item: f'child_blocks_forever={item}'
+    ids=lambda item: f'callee_blocks_forever={item}'
 )
 @pytest.mark.parametrize(
     'pointlessly_open_stream',
@@ -181,7 +181,7 @@ async def assert_state(value: bool):
 )
 def test_simple_context(
     error_parent,
-    child_blocks_forever,
+    callee_blocks_forever,
     pointlessly_open_stream,
     debug_mode: bool,
 ):
@@ -204,13 +204,13 @@ def test_simple_context(
                         portal.open_context(
                             simple_setup_teardown,
                             data=10,
-                            block_forever=child_blocks_forever,
+                            block_forever=callee_blocks_forever,
                         ) as (ctx, sent),
                     ):
                         assert current_ipc_ctx() is ctx
                         assert sent == 11
 
-                        if child_blocks_forever:
+                        if callee_blocks_forever:
                             await portal.run(assert_state, value=True)
                         else:
                             assert await ctx.result() == 'yo'
@@ -220,7 +220,7 @@ def test_simple_context(
                                 if error_parent:
                                     raise error_parent
 
-                                if child_blocks_forever:
+                                if callee_blocks_forever:
                                     await ctx.cancel()
                                 else:
                                     # in this case the stream will send a
@@ -259,9 +259,9 @@ def test_simple_context(
 
 
 @pytest.mark.parametrize(
-    'child_returns_early',
+    'callee_returns_early',
     [True, False],
-    ids=lambda item: f'child_returns_early={item}'
+    ids=lambda item: f'callee_returns_early={item}'
 )
 @pytest.mark.parametrize(
     'cancel_method',
@@ -273,14 +273,14 @@ def test_simple_context(
     [True, False],
     ids=lambda item: f'chk_ctx_result_before_exit={item}'
 )
-def test_parent_cancels(
+def test_caller_cancels(
     cancel_method: str,
     chk_ctx_result_before_exit: bool,
-    child_returns_early: bool,
+    callee_returns_early: bool,
     debug_mode: bool,
 ):
     '''
-    Verify that when the opening side of a context (aka the parent)
+    Verify that when the opening side of a context (aka the caller)
     cancels that context, the ctx does not raise a cancelled when
     either calling `.result()` or on context exit.
 
@@ -294,7 +294,7 @@ def test_parent_cancels(
 
         if (
             cancel_method == 'portal'
-            and not child_returns_early
+            and not callee_returns_early
         ):
             try:
                 res = await ctx.result()
@@ -318,7 +318,7 @@ def test_parent_cancels(
                 pytest.fail(f'should not have raised ctxc\n{ctxc}')
 
         # we actually get a result
-        if child_returns_early:
+        if callee_returns_early:
             assert res == 'yo'
             assert ctx.outcome is res
             assert ctx.maybe_error is None
@@ -362,14 +362,14 @@ def test_parent_cancels(
             )
             timeout: float = (
                 0.5
-                if not child_returns_early
+                if not callee_returns_early
                 else 2
             )
             with trio.fail_after(timeout):
                 async with (
                     expect_ctxc(
                         yay=(
-                            not child_returns_early
+                            not callee_returns_early
                             and cancel_method == 'portal'
                         )
                     ),
@@ -377,13 +377,13 @@ def test_parent_cancels(
                     portal.open_context(
                         simple_setup_teardown,
                         data=10,
-                        block_forever=not child_returns_early,
+                        block_forever=not callee_returns_early,
                     ) as (ctx, sent),
                 ):
 
-                    if child_returns_early:
+                    if callee_returns_early:
                         # ensure we block long enough before sending
-                        # a cancel such that the child has already
+                        # a cancel such that the callee has already
                         # returned it's result.
                         await trio.sleep(0.5)
 
@@ -421,7 +421,7 @@ def test_parent_cancels(
             #   which should in turn cause `ctx._scope` to
             # catch any cancellation?
             if (
-                not child_returns_early
+                not callee_returns_early
                 and cancel_method != 'portal'
             ):
                 assert not ctx._scope.cancelled_caught
@@ -430,11 +430,11 @@ def test_parent_cancels(
 
 
 # basic stream terminations:
-# - child context closes without using stream
+# - callee context closes without using stream
-# - parent context closes without using stream
+# - caller context closes without using stream
-# - parent context calls `Context.cancel()` while streaming
+# - caller context calls `Context.cancel()` while streaming
-#   is ongoing resulting in child being cancelled
+#   is ongoing resulting in callee being cancelled
-# - child calls `Context.cancel()` while streaming and parent
+# - callee calls `Context.cancel()` while streaming and caller
 #   sees stream terminated in `RemoteActorError`
 
 # TODO: future possible features
@@ -443,6 +443,7 @@ def test_parent_cancels(
 
 @tractor.context
 async def close_ctx_immediately(
+
     ctx: Context,
 
 ) -> None:
@@ -453,24 +454,13 @@ async def close_ctx_immediately(
     async with ctx.open_stream():
         pass
 
-    print('child returning!')
 
-
-@pytest.mark.parametrize(
-    'parent_send_before_receive',
-    [
-        False,
-        True,
-    ],
-    ids=lambda item: f'child_send_before_receive={item}'
-)
 @tractor_test
-async def test_child_exits_ctx_after_stream_open(
+async def test_callee_closes_ctx_after_stream_open(
     debug_mode: bool,
-    parent_send_before_receive: bool,
 ):
     '''
-    child context closes without using stream.
+    callee context closes without using stream.
 
     This should result in a msg sequence
     |_<root>_
@@ -484,9 +474,6 @@ async def test_child_exits_ctx_after_stream_open(
     => {'stop': True, 'cid': <str>}
 
     '''
-    timeout: float = (
-        0.5 if not debug_mode else 999
-    )
     async with tractor.open_nursery(
         debug_mode=debug_mode,
     ) as an:
@@ -495,7 +482,7 @@ async def test_child_exits_ctx_after_stream_open(
             enable_modules=[__name__],
         )
 
-        with trio.fail_after(timeout):
+        with trio.fail_after(0.5):
             async with portal.open_context(
                 close_ctx_immediately,
 
@@ -507,56 +494,41 @@ async def test_child_exits_ctx_after_stream_open(
 
                 with trio.fail_after(0.4):
                     async with ctx.open_stream() as stream:
-                        if parent_send_before_receive:
-                            print('sending first msg from parent!')
-                            await stream.send('yo')
 
                         # should fall through since ``StopAsyncIteration``
                         # should be raised through translation of
                         # a ``trio.EndOfChannel`` by
                         # ``trio.abc.ReceiveChannel.__anext__()``
-                        msg = 10
+                        async for _ in stream:
-                        async for msg in stream:
                             # trigger failure if we DO NOT
                             # get an EOC!
                             assert 0
                         else:
-                            # never should get anythinig new from
-                            # the underlying stream
-                            assert msg == 10
 
                             # verify stream is now closed
                             try:
                                 with trio.fail_after(0.3):
-                                    print('parent trying to `.receive()` on EoC stream!')
                                     await stream.receive()
-                                    assert 0, 'should have raised eoc!?'
                             except trio.EndOfChannel:
-                                print('parent got EoC as expected!')
                                 pass
-                                # raise
 
                 # TODO: should be just raise the closed resource err
                 # directly here to enforce not allowing a re-open
                 # of a stream to the context (at least until a time of
                 # if/when we decide that's a good idea?)
                 try:
-                    with trio.fail_after(timeout):
+                    with trio.fail_after(0.5):
                         async with ctx.open_stream() as stream:
                             pass
                 except trio.ClosedResourceError:
                     pass
 
-                # if ctx._rx_chan._state.data:
-                #     await tractor.pause()
-
         await portal.cancel_actor()
 
 
 @tractor.context
 async def expect_cancelled(
     ctx: Context,
-    send_before_receive: bool = False,
 
 ) -> None:
     global _state
@@ -566,10 +538,6 @@ async def expect_cancelled(
 
     try:
         async with ctx.open_stream() as stream:
-
-            if send_before_receive:
-                await stream.send('yo')
-
             async for msg in stream:
                 await stream.send(msg)  # echo server
 
@@ -596,49 +564,26 @@ async def expect_cancelled(
         raise
 
     else:
-        assert 0, "child wasn't cancelled !?"
+        assert 0, "callee wasn't cancelled !?"
 
 
-@pytest.mark.parametrize(
-    'child_send_before_receive',
-    [
-        False,
-        True,
-    ],
-    ids=lambda item: f'child_send_before_receive={item}'
-)
-@pytest.mark.parametrize(
-    'rent_wait_for_msg',
-    [
-        False,
-        True,
-    ],
-    ids=lambda item: f'rent_wait_for_msg={item}'
-)
 @pytest.mark.parametrize(
     'use_ctx_cancel_method',
-    [
+    [False, True],
-        False,
-        'pre_stream',
-        'post_stream_open',
-        'post_stream_close',
-    ],
-    ids=lambda item: f'use_ctx_cancel_method={item}'
 )
 @tractor_test
-async def test_parent_exits_ctx_after_child_enters_stream(
+async def test_caller_closes_ctx_after_callee_opens_stream(
-    use_ctx_cancel_method: bool|str,
+    use_ctx_cancel_method: bool,
     debug_mode: bool,
-    rent_wait_for_msg: bool,
-    child_send_before_receive: bool,
 ):
     '''
-    Parent-side of IPC context closes without sending on `MsgStream`.
+    caller context closes without using/opening stream
 
     '''
     async with tractor.open_nursery(
         debug_mode=debug_mode,
     ) as an:
+
         root: Actor = current_actor()
         portal = await an.start_actor(
             'ctx_cancelled',
@@ -647,52 +592,41 @@ async def test_parent_exits_ctx_after_child_enters_stream(
 
         async with portal.open_context(
             expect_cancelled,
-            send_before_receive=child_send_before_receive,
         ) as (ctx, sent):
             assert sent is None
 
             await portal.run(assert_state, value=True)
 
             # call `ctx.cancel()` explicitly
-            if use_ctx_cancel_method == 'pre_stream':
+            if use_ctx_cancel_method:
                 await ctx.cancel()
 
                 # NOTE: means the local side `ctx._scope` will
                 # have been cancelled by an ctxc ack and thus
                 # `._scope.cancelled_caught` should be set.
-                async with (
+                try:
-                    expect_ctxc(
-                        # XXX: the cause is US since we call
-                        # `Context.cancel()` just above!
-                        yay=True,
-
-                        # XXX: must be propagated to __aexit__
-                        # and should be silently absorbed there
-                        # since we called `.cancel()` just above ;)
-                        reraise=True,
-                    ) as maybe_ctxc,
-                ):
                     async with ctx.open_stream() as stream:
+                        async for msg in stream:
+                            pass
 
-                        if rent_wait_for_msg:
+                except tractor.ContextCancelled as ctxc:
-                            async for msg in stream:
+                    # XXX: the cause is US since we call
-                                print(f'PARENT rx: {msg!r}\n')
+                    # `Context.cancel()` just above!
-                                break
+                    assert (
+                        ctxc.canceller
+                        ==
+                        current_actor().uid
+                        ==
+                        root.uid
+                    )
 
-                        if use_ctx_cancel_method == 'post_stream_open':
+                    # XXX: must be propagated to __aexit__
-                            await ctx.cancel()
+                    # and should be silently absorbed there
+                    # since we called `.cancel()` just above ;)
+                    raise
 
-                    if use_ctx_cancel_method == 'post_stream_close':
+                else:
-                        await ctx.cancel()
+                    assert 0, "Should have context cancelled?"
-
-                ctxc: tractor.ContextCancelled = maybe_ctxc.value
-                assert (
-                    ctxc.canceller
-                    ==
-                    current_actor().uid
-                    ==
-                    root.uid
-                )
 
                 # channel should still be up
                 assert portal.channel.connected()
@@ -703,20 +637,13 @@ async def test_parent_exits_ctx_after_child_enters_stream(
                     value=False,
                 )
 
-            # XXX CHILD-BLOCKS case, we SHOULD NOT exit from the
-            # `.open_context()` before the child has returned,
-            # errored or been cancelled!
             else:
                 try:
-                    with trio.fail_after(
+                    with trio.fail_after(0.2):
-                        0.5  # if not debug_mode else 999
+                        await ctx.result()
-                    ):
-                        res = await ctx.wait_for_result()
-                        assert res is not tractor._context.Unresolved
                         assert 0, "Callee should have blocked!?"
                 except trio.TooSlowError:
-                    # NO-OP -> since already triggered by
+                    # NO-OP -> since already called above
-                    # `trio.fail_after()` above!
                     await ctx.cancel()
 
         # NOTE: local scope should have absorbed the cancellation since
@@ -756,7 +683,7 @@ async def test_parent_exits_ctx_after_child_enters_stream(
 
 
 @tractor_test
-async def test_multitask_parent_cancels_from_nonroot_task(
+async def test_multitask_caller_cancels_from_nonroot_task(
     debug_mode: bool,
 ):
     async with tractor.open_nursery(
@@ -808,6 +735,7 @@ async def test_multitask_parent_cancels_from_nonroot_task(
 
 @tractor.context
 async def cancel_self(
+
     ctx: Context,
 
 ) -> None:
@@ -847,11 +775,11 @@ async def cancel_self(
 
 
 @tractor_test
-async def test_child_cancels_before_started(
+async def test_callee_cancels_before_started(
     debug_mode: bool,
 ):
     '''
-    Callee calls `Context.cancel()` while streaming and parent
+    Callee calls `Context.cancel()` while streaming and caller
     sees stream terminated in `ContextCancelled`.
 
     '''
@@ -898,13 +826,14 @@ async def never_open_stream(
 
 
 @tractor.context
-async def keep_sending_from_child(
+async def keep_sending_from_callee(
+
     ctx:  Context,
     msg_buffer_size: int|None = None,
 
 ) -> None:
     '''
-    Send endlessly on the child stream.
+    Send endlessly on the calleee stream.
 
     '''
     await ctx.started()
@@ -912,7 +841,7 @@ async def keep_sending_from_child(
         msg_buffer_size=msg_buffer_size,
     ) as stream:
         for msg in count():
-            print(f'child sending {msg}')
+            print(f'callee sending {msg}')
             await stream.send(msg)
             await trio.sleep(0.01)
 
@@ -920,12 +849,12 @@ async def keep_sending_from_child(
 @pytest.mark.parametrize(
     'overrun_by',
     [
-        ('parent', 1, never_open_stream),
+        ('caller', 1, never_open_stream),
-        ('child', 0, keep_sending_from_child),
+        ('callee', 0, keep_sending_from_callee),
     ],
     ids=[
-         ('parent_1buf_never_open_stream'),
+         ('caller_1buf_never_open_stream'),
-         ('child_0buf_keep_sending_from_child'),
+         ('callee_0buf_keep_sending_from_callee'),
     ]
 )
 def test_one_end_stream_not_opened(
@@ -956,7 +885,8 @@ def test_one_end_stream_not_opened(
                 ) as (ctx, sent):
                     assert sent is None
 
-                    if 'parent' in overrunner:
+                    if 'caller' in overrunner:
+
                         async with ctx.open_stream() as stream:
 
                             # itersend +1 msg more then the buffer size
@@ -971,7 +901,7 @@ def test_one_end_stream_not_opened(
                                 await trio.sleep_forever()
 
                     else:
-                        # child overruns parent case so we do nothing here
+                        # callee overruns caller case so we do nothing here
                         await trio.sleep_forever()
 
             await portal.cancel_actor()
@@ -979,19 +909,19 @@ def test_one_end_stream_not_opened(
     # 2 overrun cases and the no overrun case (which pushes right up to
     # the msg limit)
     if (
-        overrunner == 'parent'
+        overrunner == 'caller'
     ):
         with pytest.raises(tractor.RemoteActorError) as excinfo:
             trio.run(main)
 
         assert excinfo.value.boxed_type == StreamOverrun
 
-    elif overrunner == 'child':
+    elif overrunner == 'callee':
         with pytest.raises(tractor.RemoteActorError) as excinfo:
             trio.run(main)
 
         # TODO: embedded remote errors so that we can verify the source
-        # error? the child delivers an error which is an overrun
+        # error? the callee delivers an error which is an overrun
         # wrapped in a remote actor error.
         assert excinfo.value.boxed_type == tractor.RemoteActorError
 
@@ -1001,7 +931,8 @@ def test_one_end_stream_not_opened(
 
 @tractor.context
 async def echo_back_sequence(
-    ctx: Context,
+
+    ctx:  Context,
     seq: list[int],
     wait_for_cancel: bool,
     allow_overruns_side: str,
@@ -1010,12 +941,12 @@ async def echo_back_sequence(
 
 ) -> None:
     '''
-    Send endlessly on the child stream using a small buffer size
+    Send endlessly on the calleee stream using a small buffer size
     setting on the contex to simulate backlogging that would normally
     cause overruns.
 
     '''
-    # NOTE: ensure that if the parent is expecting to cancel this task
+    # NOTE: ensure that if the caller is expecting to cancel this task
     # that we stay echoing much longer then they are so we don't
     # return early instead of receive the cancel msg.
     total_batches: int = (
@@ -1024,7 +955,7 @@ async def echo_back_sequence(
     )
 
     await ctx.started()
-    # await tractor.pause()
+    # await tractor.breakpoint()
     async with ctx.open_stream(
         msg_buffer_size=msg_buffer_size,
 
@@ -1065,18 +996,18 @@ async def echo_back_sequence(
                 if be_slow:
                     await trio.sleep(0.05)
 
-                print('child waiting on next')
+                print('callee waiting on next')
 
-            print(f'child echoing back latest batch\n{batch}')
+            print(f'callee echoing back latest batch\n{batch}')
             for msg in batch:
-                print(f'child sending msg\n{msg}')
+                print(f'callee sending msg\n{msg}')
                 await stream.send(msg)
 
     try:
         return 'yo'
     finally:
         print(
-            'exiting child with context:\n'
+            'exiting callee with context:\n'
             f'{pformat(ctx)}\n'
         )
 
@@ -1130,7 +1061,7 @@ def test_maybe_allow_overruns_stream(
             debug_mode=debug_mode,
         ) as an:
             portal = await an.start_actor(
-                'child_sends_forever',
+                'callee_sends_forever',
                 enable_modules=[__name__],
                 loglevel=loglevel,
                 debug_mode=debug_mode,

tests/test_debugger.py

@@ -13,25 +13,26 @@ TODO:
 from functools import partial
 import itertools
 import platform
+import pathlib
 import time
 
 import pytest
+import pexpect
 from pexpect.exceptions import (
     TIMEOUT,
     EOF,
 )
 
-from .conftest import (
+from tractor._testing import (
-    do_ctlc,
+    examples_dir,
-    PROMPT,
+)
+from tractor.devx._debug import (
     _pause_msg,
     _crash_msg,
     _repl_fail_msg,
 )
 from .conftest import (
-    expect,
+    _ci_env,
-    in_prompt_msg,
-    assert_before,
 )
 
 # TODO: The next great debugger audit could be done by you!
@@ -51,6 +52,15 @@ if platform.system() == 'Windows':
     )
 
 
+def mk_cmd(ex_name: str) -> str:
+    '''
+    Generate a command suitable to pass to ``pexpect.spawn()``.
+
+    '''
+    script_path: pathlib.Path = examples_dir() / 'debugging' / f'{ex_name}.py'
+    return ' '.join(['python', str(script_path)])
+
+
 # TODO: was trying to this xfail style but some weird bug i see in CI
 # that's happening at collect time.. pretty soon gonna dump actions i'm
 # thinkin...
@@ -69,6 +79,142 @@ has_nested_actors = pytest.mark.has_nested_actors
 # )
 
 
+@pytest.fixture
+def spawn(
+    start_method,
+    testdir,
+    reg_addr,
+) -> 'pexpect.spawn':
+
+    if start_method != 'trio':
+        pytest.skip(
+            "Debugger tests are only supported on the trio backend"
+        )
+
+    def _spawn(cmd):
+        return testdir.spawn(
+            cmd=mk_cmd(cmd),
+            expect_timeout=3,
+        )
+
+    return _spawn
+
+
+PROMPT = r"\(Pdb\+\)"
+
+
+def expect(
+    child,
+
+    # prompt by default
+    patt: str = PROMPT,
+
+    **kwargs,
+
+) -> None:
+    '''
+    Expect wrapper that prints last seen console
+    data before failing.
+
+    '''
+    try:
+        child.expect(
+            patt,
+            **kwargs,
+        )
+    except TIMEOUT:
+        before = str(child.before.decode())
+        print(before)
+        raise
+
+
+def in_prompt_msg(
+    prompt: str,
+    parts: list[str],
+
+    pause_on_false: bool = False,
+    print_prompt_on_false: bool = True,
+
+) -> bool:
+    '''
+    Predicate check if (the prompt's) std-streams output has all
+    `str`-parts in it.
+
+    Can be used in test asserts for bulk matching expected
+    log/REPL output for a given `pdb` interact point.
+
+    '''
+    __tracebackhide__: bool = False
+
+    for part in parts:
+        if part not in prompt:
+            if pause_on_false:
+                import pdbp
+                pdbp.set_trace()
+
+            if print_prompt_on_false:
+                print(prompt)
+
+            return False
+
+    return True
+
+
+# TODO: todo support terminal color-chars stripping so we can match
+# against call stack frame output from the the 'll' command the like!
+# -[ ] SO answer for stipping ANSI codes: https://stackoverflow.com/a/14693789
+def assert_before(
+    child,
+    patts: list[str],
+
+    **kwargs,
+
+) -> None:
+    __tracebackhide__: bool = False
+
+    # as in before the prompt end
+    before: str = str(child.before.decode())
+    assert in_prompt_msg(
+        prompt=before,
+        parts=patts,
+
+        **kwargs
+    )
+
+
+@pytest.fixture(
+    params=[False, True],
+    ids='ctl-c={}'.format,
+)
+def ctlc(
+    request,
+    ci_env: bool,
+
+) -> bool:
+
+    use_ctlc = request.param
+
+    node = request.node
+    markers = node.own_markers
+    for mark in markers:
+        if mark.name == 'has_nested_actors':
+            pytest.skip(
+                f'Test {node} has nested actors and fails with Ctrl-C.\n'
+                f'The test can sometimes run fine locally but until'
+                ' we solve' 'this issue this CI test will be xfail:\n'
+                'https://github.com/goodboy/tractor/issues/320'
+            )
+
+    if use_ctlc:
+        # XXX: disable pygments highlighting for auto-tests
+        # since some envs (like actions CI) will struggle
+        # the the added color-char encoding..
+        from tractor.devx._debug import TractorConfig
+        TractorConfig.use_pygements = False
+
+    yield use_ctlc
+
+
 @pytest.mark.parametrize(
     'user_in_out',
     [
@@ -92,15 +238,14 @@ def test_root_actor_error(
     # scan for the prompt
     expect(child, PROMPT)
 
+    before = str(child.before.decode())
+
     # make sure expected logging and error arrives
     assert in_prompt_msg(
-        child,
+        before,
-        [
+        [_crash_msg, "('root'"]
-            _crash_msg,
-            "('root'",
-            'AssertionError',
-        ]
     )
+    assert 'AssertionError' in before
 
     # send user command
     child.sendline(user_input)
@@ -119,10 +264,8 @@ def test_root_actor_error(
     ids=lambda item: f'{item[0]} -> {item[1]}',
 )
 def test_root_actor_bp(spawn, user_in_out):
-    '''
+    """Demonstrate breakpoint from in root actor.
-    Demonstrate breakpoint from in root actor.
+    """
-
-    '''
     user_input, expect_err_str = user_in_out
     child = spawn('root_actor_breakpoint')
 
@@ -136,7 +279,7 @@ def test_root_actor_bp(spawn, user_in_out):
     child.expect('\r\n')
 
     # process should exit
-    child.expect(EOF)
+    child.expect(pexpect.EOF)
 
     if expect_err_str is None:
         assert 'Error' not in str(child.before)
@@ -144,6 +287,38 @@ def test_root_actor_bp(spawn, user_in_out):
         assert expect_err_str in str(child.before)
 
 
+def do_ctlc(
+    child,
+    count: int = 3,
+    delay: float = 0.1,
+    patt: str|None = None,
+
+    # expect repl UX to reprint the prompt after every
+    # ctrl-c send.
+    # XXX: no idea but, in CI this never seems to work even on 3.10 so
+    # needs some further investigation potentially...
+    expect_prompt: bool = not _ci_env,
+
+) -> None:
+
+    # make sure ctl-c sends don't do anything but repeat output
+    for _ in range(count):
+        time.sleep(delay)
+        child.sendcontrol('c')
+
+        # TODO: figure out why this makes CI fail..
+        # if you run this test manually it works just fine..
+        if expect_prompt:
+            before = str(child.before.decode())
+            time.sleep(delay)
+            child.expect(PROMPT)
+            time.sleep(delay)
+
+            if patt:
+                # should see the last line on console
+                assert patt in before
+
+
 def test_root_actor_bp_forever(
     spawn,
     ctlc: bool,
@@ -183,7 +358,7 @@ def test_root_actor_bp_forever(
 
     # quit out of the loop
     child.sendline('q')
-    child.expect(EOF)
+    child.expect(pexpect.EOF)
 
 
 @pytest.mark.parametrize(
@@ -205,12 +380,10 @@ def test_subactor_error(
     # scan for the prompt
     child.expect(PROMPT)
 
+    before = str(child.before.decode())
     assert in_prompt_msg(
-        child,
+        before,
-        [
+        [_crash_msg, "('name_error'"]
-            _crash_msg,
-            "('name_error'",
-        ]
     )
 
     if do_next:
@@ -229,15 +402,17 @@ def test_subactor_error(
         child.sendline('continue')
 
     child.expect(PROMPT)
+    before = str(child.before.decode())
+
+    # root actor gets debugger engaged
     assert in_prompt_msg(
-        child,
+        before,
-        [
+        [_crash_msg, "('root'"]
-            _crash_msg,
+    )
-            # root actor gets debugger engaged
+    # error is a remote error propagated from the subactor
-            "('root'",
+    assert in_prompt_msg(
-            # error is a remote error propagated from the subactor
+        before,
-            "('name_error'",
+        [_crash_msg, "('name_error'"]
-        ]
     )
 
     # another round
@@ -248,7 +423,7 @@ def test_subactor_error(
     child.expect('\r\n')
 
     # process should exit
-    child.expect(EOF)
+    child.expect(pexpect.EOF)
 
 
 def test_subactor_breakpoint(
@@ -258,11 +433,14 @@ def test_subactor_breakpoint(
     "Single subactor with an infinite breakpoint loop"
 
     child = spawn('subactor_breakpoint')
+
+    # scan for the prompt
     child.expect(PROMPT)
+
+    before = str(child.before.decode())
     assert in_prompt_msg(
-        child,
+        before,
-        [_pause_msg,
+        [_pause_msg, "('breakpoint_forever'"]
-         "('breakpoint_forever'",]
     )
 
     # do some "next" commands to demonstrate recurrent breakpoint
@@ -278,8 +456,9 @@ def test_subactor_breakpoint(
     for _ in range(5):
         child.sendline('continue')
         child.expect(PROMPT)
+        before = str(child.before.decode())
         assert in_prompt_msg(
-            child,
+            before,
             [_pause_msg, "('breakpoint_forever'"]
         )
 
@@ -292,8 +471,9 @@ def test_subactor_breakpoint(
     # child process should exit but parent will capture pdb.BdbQuit
     child.expect(PROMPT)
 
+    before = str(child.before.decode())
     assert in_prompt_msg(
-        child,
+        before,
         ['RemoteActorError:',
          "('breakpoint_forever'",
          'bdb.BdbQuit',]
@@ -306,16 +486,14 @@ def test_subactor_breakpoint(
     child.sendline('c')
 
     # process should exit
-    child.expect(EOF)
+    child.expect(pexpect.EOF)
 
+    before = str(child.before.decode())
     assert in_prompt_msg(
-        child, [
+        before,
-        'MessagingError:',
+        ['RemoteActorError:',
-        'RemoteActorError:',
          "('breakpoint_forever'",
-         'bdb.BdbQuit',
+         'bdb.BdbQuit',]
-        ],
-        pause_on_false=True,
     )
 
 
@@ -336,7 +514,7 @@ def test_multi_subactors(
 
     before = str(child.before.decode())
     assert in_prompt_msg(
-        child,
+        before,
         [_pause_msg, "('breakpoint_forever'"]
     )
 
@@ -357,14 +535,12 @@ def test_multi_subactors(
 
     # first name_error failure
     child.expect(PROMPT)
+    before = str(child.before.decode())
     assert in_prompt_msg(
-        child,
+        before,
-        [
+        [_crash_msg, "('name_error'"]
-            _crash_msg,
-            "('name_error'",
-            "NameError",
-        ]
     )
+    assert "NameError" in before
 
     if ctlc:
         do_ctlc(child)
@@ -388,8 +564,9 @@ def test_multi_subactors(
     # breakpoint loop should re-engage
     child.sendline('c')
     child.expect(PROMPT)
+    before = str(child.before.decode())
     assert in_prompt_msg(
-        child,
+        before,
         [_pause_msg, "('breakpoint_forever'"]
     )
 
@@ -452,7 +629,7 @@ def test_multi_subactors(
 
     # process should exit
     child.sendline('c')
-    child.expect(EOF)
+    child.expect(pexpect.EOF)
 
     # repeat of previous multierror for final output
     assert_before(child, [
@@ -482,28 +659,25 @@ def test_multi_daemon_subactors(
     # the root's tty lock first so anticipate either crash
     # message on the first entry.
 
-    bp_forev_parts = [
+    bp_forev_parts = [_pause_msg, "('bp_forever'"]
-        _pause_msg,
-        "('bp_forever'",
-    ]
     bp_forev_in_msg = partial(
         in_prompt_msg,
         parts=bp_forev_parts,
     )
 
-    name_error_msg: str = "NameError: name 'doggypants' is not defined"
+    name_error_msg = "NameError: name 'doggypants' is not defined"
-    name_error_parts: list[str] = [name_error_msg]
+    name_error_parts = [name_error_msg]
 
     before = str(child.before.decode())
 
-    if bp_forev_in_msg(child=child):
+    if bp_forev_in_msg(prompt=before):
         next_parts = name_error_parts
 
     elif name_error_msg in before:
         next_parts = bp_forev_parts
 
     else:
-        raise ValueError('Neither log msg was found !?')
+        raise ValueError("Neither log msg was found !?")
 
     if ctlc:
         do_ctlc(child)
@@ -572,12 +746,14 @@ def test_multi_daemon_subactors(
     # wait for final error in root
     # where it crashs with boxed error
     while True:
-        child.sendline('c')
+        try:
-        child.expect(PROMPT)
+            child.sendline('c')
-        if not in_prompt_msg(
+            child.expect(PROMPT)
-            child,
+            assert_before(
-            bp_forev_parts
+                child,
-        ):
+                bp_forev_parts
+            )
+        except AssertionError:
             break
 
     assert_before(
@@ -593,7 +769,7 @@ def test_multi_daemon_subactors(
     )
 
     child.sendline('c')
-    child.expect(EOF)
+    child.expect(pexpect.EOF)
 
 
 @has_nested_actors
@@ -669,7 +845,7 @@ def test_multi_subactors_root_errors(
     ])
 
     child.sendline('c')
-    child.expect(EOF)
+    child.expect(pexpect.EOF)
 
     assert_before(child, [
         # "Attaching to pdb in crashed actor: ('root'",
@@ -758,13 +934,10 @@ def test_root_nursery_cancels_before_child_releases_tty_lock(
     child = spawn('root_cancelled_but_child_is_in_tty_lock')
 
     child.expect(PROMPT)
-    assert_before(
+
-        child,
+    before = str(child.before.decode())
-        [
+    assert "NameError: name 'doggypants' is not defined" in before
-            "NameError: name 'doggypants' is not defined",
+    assert "tractor._exceptions.RemoteActorError: ('name_error'" not in before
-            "tractor._exceptions.RemoteActorError: ('name_error'",
-        ],
-    )
     time.sleep(0.5)
 
     if ctlc:
@@ -802,7 +975,7 @@ def test_root_nursery_cancels_before_child_releases_tty_lock(
 
     for i in range(3):
         try:
-            child.expect(EOF, timeout=0.5)
+            child.expect(pexpect.EOF, timeout=0.5)
             break
         except TIMEOUT:
             child.sendline('c')
@@ -844,7 +1017,7 @@ def test_root_cancels_child_context_during_startup(
         do_ctlc(child)
 
     child.sendline('c')
-    child.expect(EOF)
+    child.expect(pexpect.EOF)
 
 
 def test_different_debug_mode_per_actor(
@@ -855,8 +1028,9 @@ def test_different_debug_mode_per_actor(
     child.expect(PROMPT)
 
     # only one actor should enter the debugger
+    before = str(child.before.decode())
     assert in_prompt_msg(
-        child,
+        before,
         [_crash_msg, "('debugged_boi'", "RuntimeError"],
     )
 
@@ -864,7 +1038,9 @@ def test_different_debug_mode_per_actor(
         do_ctlc(child)
 
     child.sendline('c')
-    child.expect(EOF)
+    child.expect(pexpect.EOF)
+
+    before = str(child.before.decode())
 
     # NOTE: this debugged actor error currently WON'T show up since the
     # root will actually cancel and terminate the nursery before the error
@@ -883,6 +1059,103 @@ def test_different_debug_mode_per_actor(
     )
 
 
+def test_pause_from_sync(
+    spawn,
+    ctlc: bool
+):
+    '''
+    Verify we can use the `pdbp` REPL from sync functions AND from
+    any thread spawned with `trio.to_thread.run_sync()`.
+
+    `examples/debugging/sync_bp.py`
+
+    '''
+    child = spawn('sync_bp')
+
+    # first `sync_pause()` after nurseries open
+    child.expect(PROMPT)
+    assert_before(
+        child,
+        [
+            # pre-prompt line
+            _pause_msg,
+            "<Task '__main__.main'",
+            "('root'",
+        ]
+    )
+    if ctlc:
+        do_ctlc(child)
+
+    child.sendline('c')
+
+
+    # first `await tractor.pause()` inside `p.open_context()` body
+    child.expect(PROMPT)
+
+    # XXX shouldn't see gb loaded message with PDB loglevel!
+    before = str(child.before.decode())
+    assert not in_prompt_msg(
+        before,
+        ['`greenback` portal opened!'],
+    )
+    # should be same root task
+    assert_before(
+        child,
+        [
+            _pause_msg,
+            "<Task '__main__.main'",
+            "('root'",
+        ]
+    )
+
+    if ctlc:
+        do_ctlc(child)
+
+    # one of the bg thread or subactor should have
+    # `Lock.acquire()`-ed
+    # (NOT both, which will result in REPL clobbering!)
+    attach_patts: dict[str, list[str]] = {
+        'subactor': [
+            "'start_n_sync_pause'",
+            "('subactor'",
+        ],
+        'inline_root_bg_thread': [
+            "<Thread(inline_root_bg_thread",
+            "('root'",
+        ],
+        'start_soon_root_bg_thread': [
+            "<Thread(start_soon_root_bg_thread",
+            "('root'",
+        ],
+    }
+    while attach_patts:
+        child.sendline('c')
+        child.expect(PROMPT)
+        before = str(child.before.decode())
+        for key in attach_patts.copy():
+            if key in before:
+                expected_patts: str = attach_patts.pop(key)
+                assert_before(
+                    child,
+                    [_pause_msg] + expected_patts
+                )
+                break
+
+        # ensure no other task/threads engaged a REPL
+        # at the same time as the one that was detected above.
+        for key, other_patts in attach_patts.items():
+            assert not in_prompt_msg(
+                before,
+                other_patts,
+            )
+
+        if ctlc:
+            do_ctlc(child)
+
+    child.sendline('c')
+    child.expect(pexpect.EOF)
+
+
 def test_post_mortem_api(
     spawn,
     ctlc: bool,
@@ -985,7 +1258,7 @@ def test_post_mortem_api(
     # )
 
     child.sendline('c')
-    child.expect(EOF)
+    child.expect(pexpect.EOF)
 
 
 def test_shield_pause(
@@ -1060,26 +1333,9 @@ def test_shield_pause(
         ]
     )
     child.sendline('c')
-    child.expect(EOF)
+    child.expect(pexpect.EOF)
 
 
-# TODO: better error for "non-ideal" usage from the root actor.
-# -[ ] if called from an async scope emit a message that suggests
-#    using `await tractor.pause()` instead since it's less overhead
-#    (in terms of `greenback` and/or extra threads) and if it's from
-#    a sync scope suggest that usage must first call
-#    `ensure_portal()` in the (eventual parent) async calling scope?
-def test_sync_pause_from_bg_task_in_root_actor_():
-    '''
-    When used from the root actor, normally we can only implicitly
-    support `.pause_from_sync()` from the main-parent-task (that
-    opens the runtime via `open_root_actor()`) since `greenback`
-    requires a `.ensure_portal()` call per `trio.Task` where it is
-    used.
-
-    '''
-    ...
-
 # TODO: needs ANSI code stripping tho, see `assert_before()` # above!
 def test_correct_frames_below_hidden():
     '''

tests/test_discovery.py

@@ -181,9 +181,7 @@ async def spawn_and_check_registry(
 
             try:
                 async with tractor.open_nursery() as n:
-                    async with trio.open_nursery(
+                    async with trio.open_nursery() as trion:
-                        strict_exception_groups=False,
-                    ) as trion:
 
                         portals = {}
                         for i in range(3):
@@ -318,9 +316,7 @@ async def close_chans_before_nursery(
                         async with portal2.open_stream_from(
                             stream_forever
                         ) as agen2:
-                            async with trio.open_nursery(
+                            async with trio.open_nursery() as n:
-                                strict_exception_groups=False,
-                            ) as n:
                                 n.start_soon(streamer, agen1)
                                 n.start_soon(cancel, use_signal, .5)
                                 try:

tests/test_docs_examples.py

@@ -19,7 +19,7 @@ from tractor._testing import (
 @pytest.fixture
 def run_example_in_subproc(
     loglevel: str,
-    testdir: pytest.Pytester,
+    testdir: pytest.Testdir,
     reg_addr: tuple[str, int],
 ):
 
@@ -81,36 +81,28 @@ def run_example_in_subproc(
 
     # walk yields: (dirpath, dirnames, filenames)
     [
-        (p[0], f)
+        (p[0], f) for p in os.walk(examples_dir()) for f in p[2]
-        for p in os.walk(examples_dir())
-        for f in p[2]
 
-        if (
+        if '__' not in f
-            '__' not in f
+        and f[0] != '_'
-            and f[0] != '_'
+        and 'debugging' not in p[0]
-            and 'debugging' not in p[0]
+        and 'integration' not in p[0]
-            and 'integration' not in p[0]
+        and 'advanced_faults' not in p[0]
-            and 'advanced_faults' not in p[0]
+        and 'multihost' not in p[0]
-            and 'multihost' not in p[0]
-        )
     ],
+
     ids=lambda t: t[1],
 )
-def test_example(
+def test_example(run_example_in_subproc, example_script):
-    run_example_in_subproc,
+    """Load and run scripts from this repo's ``examples/`` dir as a user
-    example_script,
-):
-    '''
-    Load and run scripts from this repo's ``examples/`` dir as a user
     would copy and pasing them into their editor.
 
     On windows a little more "finessing" is done to make
     ``multiprocessing`` play nice: we copy the ``__main__.py`` into the
     test directory and invoke the script as a module with ``python -m
     test_example``.
-
+    """
-    '''
+    ex_file = os.path.join(*example_script)
-    ex_file: str = os.path.join(*example_script)
 
     if 'rpc_bidir_streaming' in ex_file and sys.version_info < (3, 9):
         pytest.skip("2-way streaming example requires py3.9 async with syntax")
@@ -136,8 +128,7 @@ def test_example(
                     # shouldn't eventually once we figure out what's
                     # a better way to be explicit about aio side
                     # cancels?
-                    and
+                    and 'asyncio.exceptions.CancelledError' not in last_error
-                    'asyncio.exceptions.CancelledError' not in last_error
                 ):
                     raise Exception(errmsg)
 

tests/test_ext_types_msgspec.py

@@ -1,946 +0,0 @@
-'''
-Low-level functional audits for our
-"capability based messaging"-spec feats.
-
-B~)
-
-'''
-from contextlib import (
-    contextmanager as cm,
-    # nullcontext,
-)
-import importlib
-from typing import (
-    Any,
-    Type,
-    Union,
-)
-
-from msgspec import (
-    # structs,
-    # msgpack,
-    Raw,
-    # Struct,
-    ValidationError,
-)
-import pytest
-import trio
-
-import tractor
-from tractor import (
-    Actor,
-    # _state,
-    MsgTypeError,
-    Context,
-)
-from tractor.msg import (
-    _codec,
-    _ctxvar_MsgCodec,
-    _exts,
-
-    NamespacePath,
-    MsgCodec,
-    MsgDec,
-    mk_codec,
-    mk_dec,
-    apply_codec,
-    current_codec,
-)
-from tractor.msg.types import (
-    log,
-    Started,
-    # _payload_msgs,
-    # PayloadMsg,
-    # mk_msg_spec,
-)
-from tractor.msg._ops import (
-    limit_plds,
-)
-
-def enc_nsp(obj: Any) -> Any:
-    actor: Actor = tractor.current_actor(
-        err_on_no_runtime=False,
-    )
-    uid: tuple[str, str]|None = None if not actor else actor.uid
-    print(f'{uid} ENC HOOK')
-
-    match obj:
-        # case NamespacePath()|str():
-        case NamespacePath():
-            encoded: str = str(obj)
-            print(
-                f'----- ENCODING `NamespacePath` as `str` ------\n'
-                f'|_obj:{type(obj)!r} = {obj!r}\n'
-                f'|_encoded: str = {encoded!r}\n'
-            )
-            # if type(obj) != NamespacePath:
-            #     breakpoint()
-            return encoded
-        case _:
-            logmsg: str = (
-                f'{uid}\n'
-                'FAILED ENCODE\n'
-                f'obj-> `{obj}: {type(obj)}`\n'
-            )
-            raise NotImplementedError(logmsg)
-
-
-def dec_nsp(
-    obj_type: Type,
-    obj: Any,
-
-) -> Any:
-    # breakpoint()
-    actor: Actor = tractor.current_actor(
-        err_on_no_runtime=False,
-    )
-    uid: tuple[str, str]|None = None if not actor else actor.uid
-    print(
-        f'{uid}\n'
-        'CUSTOM DECODE\n'
-        f'type-arg-> {obj_type}\n'
-        f'obj-arg-> `{obj}`: {type(obj)}\n'
-    )
-    nsp = None
-    # XXX, never happens right?
-    if obj_type is Raw:
-        breakpoint()
-
-    if (
-        obj_type is NamespacePath
-        and isinstance(obj, str)
-        and ':' in obj
-    ):
-        nsp = NamespacePath(obj)
-        # TODO: we could built a generic handler using
-        # JUST matching the obj_type part?
-        # nsp = obj_type(obj)
-
-    if nsp:
-        print(f'Returning NSP instance: {nsp}')
-        return nsp
-
-    logmsg: str = (
-        f'{uid}\n'
-        'FAILED DECODE\n'
-        f'type-> {obj_type}\n'
-        f'obj-arg-> `{obj}`: {type(obj)}\n\n'
-        f'current codec:\n'
-        f'{current_codec()}\n'
-    )
-    # TODO: figure out the ignore subsys for this!
-    # -[ ] option whether to defense-relay backc the msg
-    #   inside an `Invalid`/`Ignore`
-    # -[ ] how to make this handling pluggable such that a
-    #   `Channel`/`MsgTransport` can intercept and process
-    #   back msgs either via exception handling or some other
-    #   signal?
-    log.warning(logmsg)
-    # NOTE: this delivers the invalid
-    # value up to `msgspec`'s decoding
-    # machinery for error raising.
-    return obj
-    # raise NotImplementedError(logmsg)
-
-
-def ex_func(*args):
-    '''
-    A mod level func we can ref and load via our `NamespacePath`
-    python-object pointer `str` subtype.
-
-    '''
-    print(f'ex_func({args})')
-
-
-@pytest.mark.parametrize(
-    'add_codec_hooks',
-    [
-        True,
-        False,
-    ],
-    ids=['use_codec_hooks', 'no_codec_hooks'],
-)
-def test_custom_extension_types(
-    debug_mode: bool,
-    add_codec_hooks: bool
-):
-    '''
-    Verify that a `MsgCodec` (used for encoding all outbound IPC msgs
-    and decoding all inbound `PayloadMsg`s) and a paired `MsgDec`
-    (used for decoding the `PayloadMsg.pld: Raw` received within a given
-    task's ipc `Context` scope) can both send and receive "extension types"
-    as supported via custom converter hooks passed to `msgspec`.
-
-    '''
-    nsp_pld_dec: MsgDec = mk_dec(
-        spec=None,  # ONLY support the ext type
-        dec_hook=dec_nsp if add_codec_hooks else None,
-        ext_types=[NamespacePath],
-    )
-    nsp_codec: MsgCodec = mk_codec(
-        # ipc_pld_spec=Raw,  # default!
-
-        # NOTE XXX: the encode hook MUST be used no matter what since
-        # our `NamespacePath` is not any of a `Any` native type nor
-        # a `msgspec.Struct` subtype - so `msgspec` has no way to know
-        # how to encode it unless we provide the custom hook.
-        #
-        # AGAIN that is, regardless of whether we spec an
-        # `Any`-decoded-pld the enc has no knowledge (by default)
-        # how to enc `NamespacePath` (nsp), so we add a custom
-        # hook to do that ALWAYS.
-        enc_hook=enc_nsp if add_codec_hooks else None,
-
-        # XXX NOTE: pretty sure this is mutex with the `type=` to
-        # `Decoder`? so it won't work in tandem with the
-        # `ipc_pld_spec` passed above?
-        ext_types=[NamespacePath],
-
-        # TODO? is it useful to have the `.pld` decoded *prior* to
-        # the `PldRx`?? like perf or mem related?
-        # ext_dec=nsp_pld_dec,
-    )
-    if add_codec_hooks:
-        assert nsp_codec.dec.dec_hook is None
-
-        # TODO? if we pass `ext_dec` above?
-        # assert nsp_codec.dec.dec_hook is dec_nsp
-
-        assert nsp_codec.enc.enc_hook is enc_nsp
-
-    nsp = NamespacePath.from_ref(ex_func)
-
-    try:
-        nsp_bytes: bytes = nsp_codec.encode(nsp)
-        nsp_rt_sin_msg = nsp_pld_dec.decode(nsp_bytes)
-        nsp_rt_sin_msg.load_ref() is ex_func
-    except TypeError:
-        if not add_codec_hooks:
-            pass
-
-    try:
-        msg_bytes: bytes = nsp_codec.encode(
-            Started(
-                cid='cid',
-                pld=nsp,
-            )
-        )
-        # since the ext-type obj should also be set as the msg.pld
-        assert nsp_bytes in msg_bytes
-        started_rt: Started = nsp_codec.decode(msg_bytes)
-        pld: Raw = started_rt.pld
-        assert isinstance(pld, Raw)
-        nsp_rt: NamespacePath = nsp_pld_dec.decode(pld)
-        assert isinstance(nsp_rt, NamespacePath)
-        # in obj comparison terms they should be the same
-        assert nsp_rt == nsp
-        # ensure we've decoded to ext type!
-        assert nsp_rt.load_ref() is ex_func
-
-    except TypeError:
-        if not add_codec_hooks:
-            pass
-
-@tractor.context
-async def sleep_forever_in_sub(
-    ctx: Context,
-) -> None:
-    await trio.sleep_forever()
-
-
-def mk_custom_codec(
-    add_hooks: bool,
-
-) -> tuple[
-    MsgCodec,  # encode to send
-    MsgDec,  # pld receive-n-decode
-]:
-    '''
-    Create custom `msgpack` enc/dec-hooks and set a `Decoder`
-    which only loads `pld_spec` (like `NamespacePath`) types.
-
-    '''
-
-    # XXX NOTE XXX: despite defining `NamespacePath` as a type
-    # field on our `PayloadMsg.pld`, we still need a enc/dec_hook() pair
-    # to cast to/from that type on the wire. See the docs:
-    # https://jcristharif.com/msgspec/extending.html#mapping-to-from-native-types
-
-    # if pld_spec is Any:
-    #     pld_spec = Raw
-
-    nsp_codec: MsgCodec = mk_codec(
-        # ipc_pld_spec=Raw,  # default!
-
-        # NOTE XXX: the encode hook MUST be used no matter what since
-        # our `NamespacePath` is not any of a `Any` native type nor
-        # a `msgspec.Struct` subtype - so `msgspec` has no way to know
-        # how to encode it unless we provide the custom hook.
-        #
-        # AGAIN that is, regardless of whether we spec an
-        # `Any`-decoded-pld the enc has no knowledge (by default)
-        # how to enc `NamespacePath` (nsp), so we add a custom
-        # hook to do that ALWAYS.
-        enc_hook=enc_nsp if add_hooks else None,
-
-        # XXX NOTE: pretty sure this is mutex with the `type=` to
-        # `Decoder`? so it won't work in tandem with the
-        # `ipc_pld_spec` passed above?
-        ext_types=[NamespacePath],
-    )
-    # dec_hook=dec_nsp if add_hooks else None,
-    return nsp_codec
-
-
-@pytest.mark.parametrize(
-    'limit_plds_args',
-    [
-        (
-            {'dec_hook': None, 'ext_types': None},
-            None,
-        ),
-        (
-            {'dec_hook': dec_nsp, 'ext_types': None},
-            TypeError,
-        ),
-        (
-            {'dec_hook': dec_nsp, 'ext_types': [NamespacePath]},
-            None,
-        ),
-        (
-            {'dec_hook': dec_nsp, 'ext_types': [NamespacePath|None]},
-            None,
-        ),
-    ],
-    ids=[
-        'no_hook_no_ext_types',
-        'only_hook',
-        'hook_and_ext_types',
-        'hook_and_ext_types_w_null',
-    ]
-)
-def test_pld_limiting_usage(
-    limit_plds_args: tuple[dict, Exception|None],
-):
-    '''
-    Verify `dec_hook()` and `ext_types` need to either both be
-    provided or we raise a explanator type-error.
-
-    '''
-    kwargs, maybe_err = limit_plds_args
-    async def main():
-        async with tractor.open_nursery() as an:  # just to open runtime
-
-            # XXX SHOULD NEVER WORK outside an ipc ctx scope!
-            try:
-                with limit_plds(**kwargs):
-                    pass
-            except RuntimeError:
-                pass
-
-            p: tractor.Portal = await an.start_actor(
-                'sub',
-                enable_modules=[__name__],
-            )
-            async with (
-                p.open_context(
-                    sleep_forever_in_sub
-                ) as (ctx, first),
-            ):
-                try:
-                    with limit_plds(**kwargs):
-                        pass
-                except maybe_err as exc:
-                    assert type(exc) is maybe_err
-                    pass
-
-
-def chk_codec_applied(
-    expect_codec: MsgCodec|None,
-    enter_value: MsgCodec|None = None,
-
-) -> MsgCodec:
-    '''
-    buncha sanity checks ensuring that the IPC channel's
-    context-vars are set to the expected codec and that are
-    ctx-var wrapper APIs match the same.
-
-    '''
-    # TODO: play with tricyle again, bc this is supposed to work
-    # the way we want?
-    #
-    # TreeVar
-    # task: trio.Task = trio.lowlevel.current_task()
-    # curr_codec = _ctxvar_MsgCodec.get_in(task)
-
-    # ContextVar
-    # task_ctx: Context = task.context
-    # assert _ctxvar_MsgCodec in task_ctx
-    # curr_codec: MsgCodec = task.context[_ctxvar_MsgCodec]
-    if expect_codec is None:
-        assert enter_value is None
-        return
-
-    # NOTE: currently we use this!
-    # RunVar
-    curr_codec: MsgCodec = current_codec()
-    last_read_codec = _ctxvar_MsgCodec.get()
-    # assert curr_codec is last_read_codec
-
-    assert (
-        (same_codec := expect_codec) is
-        # returned from `mk_codec()`
-
-        # yielded value from `apply_codec()`
-
-        # read from current task's `contextvars.Context`
-        curr_codec is
-        last_read_codec
-
-        # the default `msgspec` settings
-        is not _codec._def_msgspec_codec
-        is not _codec._def_tractor_codec
-    )
-
-    if enter_value:
-        assert enter_value is same_codec
-
-
-@tractor.context
-async def send_back_values(
-    ctx: Context,
-    rent_pld_spec_type_strs: list[str],
-    add_hooks: bool,
-
-) -> None:
-    '''
-    Setup up a custom codec to load instances of `NamespacePath`
-    and ensure we can round trip a func ref with our parent.
-
-    '''
-    uid: tuple = tractor.current_actor().uid
-
-    # init state in sub-actor should be default
-    chk_codec_applied(
-        expect_codec=_codec._def_tractor_codec,
-    )
-
-    # load pld spec from input str
-    rent_pld_spec = _exts.dec_type_union(
-        rent_pld_spec_type_strs,
-        mods=[
-            importlib.import_module(__name__),
-        ],
-    )
-    rent_pld_spec_types: set[Type] = _codec.unpack_spec_types(
-        rent_pld_spec,
-    )
-
-    # ONLY add ext-hooks if the rent specified a non-std type!
-    add_hooks: bool = (
-        NamespacePath in rent_pld_spec_types
-        and
-        add_hooks
-    )
-
-    # same as on parent side config.
-    nsp_codec: MsgCodec|None = None
-    if add_hooks:
-        nsp_codec = mk_codec(
-            enc_hook=enc_nsp,
-            ext_types=[NamespacePath],
-        )
-
-    with (
-        maybe_apply_codec(nsp_codec) as codec,
-        limit_plds(
-            rent_pld_spec,
-            dec_hook=dec_nsp if add_hooks else None,
-            ext_types=[NamespacePath]  if add_hooks else None,
-        ) as pld_dec,
-    ):
-        # ?XXX? SHOULD WE NOT be swapping the global codec since it
-        # breaks `Context.started()` roundtripping checks??
-        chk_codec_applied(
-            expect_codec=nsp_codec,
-            enter_value=codec,
-        )
-
-        # ?TODO, mismatch case(s)?
-        #
-        # ensure pld spec matches on both sides
-        ctx_pld_dec: MsgDec = ctx._pld_rx._pld_dec
-        assert pld_dec is ctx_pld_dec
-        child_pld_spec: Type = pld_dec.spec
-        child_pld_spec_types: set[Type] = _codec.unpack_spec_types(
-            child_pld_spec,
-        )
-        assert (
-            child_pld_spec_types.issuperset(
-                rent_pld_spec_types
-            )
-        )
-
-        # ?TODO, try loop for each of the types in pld-superset?
-        #
-        # for send_value in [
-        #     nsp,
-        #     str(nsp),
-        #     None,
-        # ]:
-        nsp = NamespacePath.from_ref(ex_func)
-        try:
-            print(
-                f'{uid}: attempting to `.started({nsp})`\n'
-                f'\n'
-                f'rent_pld_spec: {rent_pld_spec}\n'
-                f'child_pld_spec: {child_pld_spec}\n'
-                f'codec: {codec}\n'
-            )
-            # await tractor.pause()
-            await ctx.started(nsp)
-
-        except tractor.MsgTypeError as _mte:
-            mte = _mte
-
-            # false -ve case
-            if add_hooks:
-                raise RuntimeError(
-                    f'EXPECTED to `.started()` value given spec ??\n\n'
-                    f'child_pld_spec -> {child_pld_spec}\n'
-                    f'value = {nsp}: {type(nsp)}\n'
-                )
-
-            # true -ve case
-            raise mte
-
-        # TODO: maybe we should add our own wrapper error so as to
-        # be interchange-lib agnostic?
-        # -[ ] the error type is wtv is raised from the hook so we
-        #   could also require a type-class of errors for
-        #   indicating whether the hook-failure can be handled by
-        #   a nasty-dialog-unprot sub-sys?
-        except TypeError as typerr:
-            # false -ve
-            if add_hooks:
-                raise RuntimeError('Should have been able to send `nsp`??')
-
-            # true -ve
-            print('Failed to send `nsp` due to no ext hooks set!')
-            raise typerr
-
-        # now try sending a set of valid and invalid plds to ensure
-        # the pld spec is respected.
-        sent: list[Any] = []
-        async with ctx.open_stream() as ipc:
-            print(
-                f'{uid}: streaming all pld types to rent..'
-            )
-
-            # for send_value, expect_send in iter_send_val_items:
-            for send_value in [
-                nsp,
-                str(nsp),
-                None,
-            ]:
-                send_type: Type = type(send_value)
-                print(
-                    f'{uid}: SENDING NEXT pld\n'
-                    f'send_type: {send_type}\n'
-                    f'send_value: {send_value}\n'
-                )
-                try:
-                    await ipc.send(send_value)
-                    sent.append(send_value)
-
-                except ValidationError as valerr:
-                    print(f'{uid} FAILED TO SEND {send_value}!')
-
-                    # false -ve
-                    if add_hooks:
-                        raise RuntimeError(
-                            f'EXPECTED to roundtrip value given spec:\n'
-                            f'rent_pld_spec -> {rent_pld_spec}\n'
-                            f'child_pld_spec -> {child_pld_spec}\n'
-                            f'value = {send_value}: {send_type}\n'
-                        )
-
-                    # true -ve
-                    raise valerr
-                    # continue
-
-            else:
-                print(
-                    f'{uid}: finished sending all values\n'
-                    'Should be exiting stream block!\n'
-                )
-
-        print(f'{uid}: exited streaming block!')
-
-
-
-@cm
-def maybe_apply_codec(codec: MsgCodec|None) -> MsgCodec|None:
-    if codec is None:
-        yield None
-        return
-
-    with apply_codec(codec) as codec:
-        yield codec
-
-
-@pytest.mark.parametrize(
-    'pld_spec',
-    [
-        Any,
-        NamespacePath,
-        NamespacePath|None,  # the "maybe" spec Bo
-    ],
-    ids=[
-        'any_type',
-        'only_nsp_ext',
-        'maybe_nsp_ext',
-    ]
-)
-@pytest.mark.parametrize(
-    'add_hooks',
-    [
-        True,
-        False,
-    ],
-    ids=[
-        'use_codec_hooks',
-        'no_codec_hooks',
-    ],
-)
-def test_ext_types_over_ipc(
-    debug_mode: bool,
-    pld_spec: Union[Type],
-    add_hooks: bool,
-):
-    '''
-    Ensure we can support extension types coverted using
-    `enc/dec_hook()`s passed to the `.msg.limit_plds()` API
-    and that sane errors happen when we try do the same without
-    the codec hooks.
-
-    '''
-    pld_types: set[Type] = _codec.unpack_spec_types(pld_spec)
-
-    async def main():
-
-        # sanity check the default pld-spec beforehand
-        chk_codec_applied(
-            expect_codec=_codec._def_tractor_codec,
-        )
-
-        # extension type we want to send as msg payload
-        nsp = NamespacePath.from_ref(ex_func)
-
-        # ^NOTE, 2 cases:
-        # - codec hooks noto added -> decode nsp as `str`
-        # - codec with hooks -> decode nsp as `NamespacePath`
-        nsp_codec: MsgCodec|None = None
-        if (
-            NamespacePath in pld_types
-            and
-            add_hooks
-        ):
-            nsp_codec = mk_codec(
-                enc_hook=enc_nsp,
-                ext_types=[NamespacePath],
-            )
-
-        async with tractor.open_nursery(
-            debug_mode=debug_mode,
-        ) as an:
-            p: tractor.Portal = await an.start_actor(
-                'sub',
-                enable_modules=[__name__],
-            )
-            with (
-                maybe_apply_codec(nsp_codec) as codec,
-            ):
-                chk_codec_applied(
-                    expect_codec=nsp_codec,
-                    enter_value=codec,
-                )
-                rent_pld_spec_type_strs: list[str] = _exts.enc_type_union(pld_spec)
-
-                # XXX should raise an mte (`MsgTypeError`)
-                # when `add_hooks == False` bc the input
-                # `expect_ipc_send` kwarg has a nsp which can't be
-                # serialized!
-                #
-                # TODO:can we ensure this happens from the
-                # `Return`-side (aka the sub) as well?
-                try:
-                    ctx: tractor.Context
-                    ipc: tractor.MsgStream
-                    async with (
-
-                        # XXX should raise an mte (`MsgTypeError`)
-                        # when `add_hooks == False`..
-                        p.open_context(
-                            send_back_values,
-                            # expect_debug=debug_mode,
-                            rent_pld_spec_type_strs=rent_pld_spec_type_strs,
-                            add_hooks=add_hooks,
-                            # expect_ipc_send=expect_ipc_send,
-                        ) as (ctx, first),
-
-                        ctx.open_stream() as ipc,
-                    ):
-                        with (
-                            limit_plds(
-                                pld_spec,
-                                dec_hook=dec_nsp if add_hooks else None,
-                                ext_types=[NamespacePath]  if add_hooks else None,
-                            ) as pld_dec,
-                        ):
-                            ctx_pld_dec: MsgDec = ctx._pld_rx._pld_dec
-                            assert pld_dec is ctx_pld_dec
-
-                            # if (
-                            #     not add_hooks
-                            #     and
-                            #     NamespacePath in 
-                            # ):
-                            #     pytest.fail('ctx should fail to open without custom enc_hook!?')
-
-                            await ipc.send(nsp)
-                            nsp_rt = await ipc.receive()
-
-                            assert nsp_rt == nsp
-                            assert nsp_rt.load_ref() is ex_func
-
-                # this test passes bc we can go no further!
-                except MsgTypeError as mte:
-                    # if not add_hooks:
-                    #     # teardown nursery
-                    #     await p.cancel_actor()
-                        # return
-
-                    raise mte
-
-            await p.cancel_actor()
-
-    if (
-        NamespacePath in pld_types
-        and
-        add_hooks
-    ):
-        trio.run(main)
-
-    else:
-        with pytest.raises(
-            expected_exception=tractor.RemoteActorError,
-        ) as excinfo:
-            trio.run(main)
-
-        exc = excinfo.value
-        # bc `.started(nsp: NamespacePath)` will raise
-        assert exc.boxed_type is TypeError
-
-
-# def chk_pld_type(
-#     payload_spec: Type[Struct]|Any,
-#     pld: Any,
-
-#     expect_roundtrip: bool|None = None,
-
-# ) -> bool:
-
-#     pld_val_type: Type = type(pld)
-
-#     # TODO: verify that the overridden subtypes
-#     # DO NOT have modified type-annots from original!
-#     # 'Start',  .pld: FuncSpec
-#     # 'StartAck',  .pld: IpcCtxSpec
-#     # 'Stop',  .pld: UNSEt
-#     # 'Error',  .pld: ErrorData
-
-#     codec: MsgCodec = mk_codec(
-#         # NOTE: this ONLY accepts `PayloadMsg.pld` fields of a specified
-#         # type union.
-#         ipc_pld_spec=payload_spec,
-#     )
-
-#     # make a one-off dec to compare with our `MsgCodec` instance
-#     # which does the below `mk_msg_spec()` call internally
-#     ipc_msg_spec: Union[Type[Struct]]
-#     msg_types: list[PayloadMsg[payload_spec]]
-#     (
-#         ipc_msg_spec,
-#         msg_types,
-#     ) = mk_msg_spec(
-#         payload_type_union=payload_spec,
-#     )
-#     _enc = msgpack.Encoder()
-#     _dec = msgpack.Decoder(
-#         type=ipc_msg_spec or Any,  # like `PayloadMsg[Any]`
-#     )
-
-#     assert (
-#         payload_spec
-#         ==
-#         codec.pld_spec
-#     )
-
-#     # assert codec.dec == dec
-#     #
-#     # ^-XXX-^ not sure why these aren't "equal" but when cast
-#     # to `str` they seem to match ?? .. kk
-
-#     assert (
-#         str(ipc_msg_spec)
-#         ==
-#         str(codec.msg_spec)
-#         ==
-#         str(_dec.type)
-#         ==
-#         str(codec.dec.type)
-#     )
-
-#     # verify the boxed-type for all variable payload-type msgs.
-#     if not msg_types:
-#         breakpoint()
-
-#     roundtrip: bool|None = None
-#     pld_spec_msg_names: list[str] = [
-#         td.__name__ for td in _payload_msgs
-#     ]
-#     for typedef in msg_types:
-
-#         skip_runtime_msg: bool = typedef.__name__ not in pld_spec_msg_names
-#         if skip_runtime_msg:
-#             continue
-
-#         pld_field = structs.fields(typedef)[1]
-#         assert pld_field.type is payload_spec # TODO-^ does this need to work to get all subtypes to adhere?
-
-#         kwargs: dict[str, Any] = {
-#             'cid': '666',
-#             'pld': pld,
-#         }
-#         enc_msg: PayloadMsg = typedef(**kwargs)
-
-#         _wire_bytes: bytes = _enc.encode(enc_msg)
-#         wire_bytes: bytes = codec.enc.encode(enc_msg)
-#         assert _wire_bytes == wire_bytes
-
-#         ve: ValidationError|None = None
-#         try:
-#             dec_msg = codec.dec.decode(wire_bytes)
-#             _dec_msg = _dec.decode(wire_bytes)
-
-#             # decoded msg and thus payload should be exactly same!
-#             assert (roundtrip := (
-#                 _dec_msg
-#                 ==
-#                 dec_msg
-#                 ==
-#                 enc_msg
-#             ))
-
-#             if (
-#                 expect_roundtrip is not None
-#                 and expect_roundtrip != roundtrip
-#             ):
-#                 breakpoint()
-
-#             assert (
-#                 pld
-#                 ==
-#                 dec_msg.pld
-#                 ==
-#                 enc_msg.pld
-#             )
-#             # assert (roundtrip := (_dec_msg == enc_msg))
-
-#         except ValidationError as _ve:
-#             ve = _ve
-#             roundtrip: bool = False
-#             if pld_val_type is payload_spec:
-#                 raise ValueError(
-#                    'Got `ValidationError` despite type-var match!?\n'
-#                     f'pld_val_type: {pld_val_type}\n'
-#                     f'payload_type: {payload_spec}\n'
-#                 ) from ve
-
-#             else:
-#                 # ow we good cuz the pld spec mismatched.
-#                 print(
-#                     'Got expected `ValidationError` since,\n'
-#                     f'{pld_val_type} is not {payload_spec}\n'
-#                 )
-#         else:
-#             if (
-#                 payload_spec is not Any
-#                 and
-#                 pld_val_type is not payload_spec
-#             ):
-#                 raise ValueError(
-#                    'DID NOT `ValidationError` despite expected type match!?\n'
-#                     f'pld_val_type: {pld_val_type}\n'
-#                     f'payload_type: {payload_spec}\n'
-#                 )
-
-#     # full code decode should always be attempted!
-#     if roundtrip is None:
-#         breakpoint()
-
-#     return roundtrip
-
-
-# ?TODO? maybe remove since covered in the newer `test_pldrx_limiting`
-# via end-2-end testing of all this?
-# -[ ] IOW do we really NEED this lowlevel unit testing?
-#
-# def test_limit_msgspec(
-#     debug_mode: bool,
-# ):
-#     '''
-#     Internals unit testing to verify that type-limiting an IPC ctx's
-#     msg spec with `Pldrx.limit_plds()` results in various
-#     encapsulated `msgspec` object settings and state.
-
-#     '''
-#     async def main():
-#         async with tractor.open_root_actor(
-#             debug_mode=debug_mode,
-#         ):
-#             # ensure we can round-trip a boxing `PayloadMsg`
-#             assert chk_pld_type(
-#                 payload_spec=Any,
-#                 pld=None,
-#                 expect_roundtrip=True,
-#             )
-
-#             # verify that a mis-typed payload value won't decode
-#             assert not chk_pld_type(
-#                 payload_spec=int,
-#                 pld='doggy',
-#             )
-
-#             # parametrize the boxed `.pld` type as a custom-struct
-#             # and ensure that parametrization propagates
-#             # to all payload-msg-spec-able subtypes!
-#             class CustomPayload(Struct):
-#                 name: str
-#                 value: Any
-
-#             assert not chk_pld_type(
-#                 payload_spec=CustomPayload,
-#                 pld='doggy',
-#             )
-
-#             assert chk_pld_type(
-#                 payload_spec=CustomPayload,
-#                 pld=CustomPayload(name='doggy', value='urmom')
-#             )
-
-#             # yah, we can `.pause_from_sync()` now!
-#             # breakpoint()
-
-#     trio.run(main)

tests/test_inter_peer_cancellation.py

@@ -170,7 +170,7 @@ def test_do_not_swallow_error_before_started_by_remote_contextcancelled(
         trio.run(main)
 
     rae = excinfo.value
-    assert rae.boxed_type is TypeError
+    assert rae.boxed_type == TypeError
 
 
 @tractor.context

tests/test_root_infect_asyncio.py

@@ -1,248 +0,0 @@
-'''
-Special attention cases for using "infect `asyncio`" mode from a root
-actor; i.e. not using a std `trio.run()` bootstrap.
-
-'''
-import asyncio
-from functools import partial
-
-import pytest
-import trio
-import tractor
-from tractor import (
-    to_asyncio,
-)
-from tests.test_infected_asyncio import (
-    aio_echo_server,
-)
-
-
-@pytest.mark.parametrize(
-    'raise_error_mid_stream',
-    [
-        False,
-        Exception,
-        KeyboardInterrupt,
-    ],
-    ids='raise_error={}'.format,
-)
-def test_infected_root_actor(
-    raise_error_mid_stream: bool|Exception,
-
-    # conftest wide
-    loglevel: str,
-    debug_mode: bool,
-):
-    '''
-    Verify you can run the `tractor` runtime with `Actor.is_infected_aio() == True`
-    in the root actor.
-
-    '''
-    async def _trio_main():
-        with trio.fail_after(2 if not debug_mode else 999):
-            first: str
-            chan: to_asyncio.LinkedTaskChannel
-            async with (
-                tractor.open_root_actor(
-                    debug_mode=debug_mode,
-                    loglevel=loglevel,
-                ),
-                to_asyncio.open_channel_from(
-                    aio_echo_server,
-                ) as (first, chan),
-            ):
-                assert first == 'start'
-
-                for i in range(1000):
-                    await chan.send(i)
-                    out = await chan.receive()
-                    assert out == i
-                    print(f'asyncio echoing {i}')
-
-                    if (
-                        raise_error_mid_stream
-                        and
-                        i == 500
-                    ):
-                        raise raise_error_mid_stream
-
-                    if out is None:
-                        try:
-                            out = await chan.receive()
-                        except trio.EndOfChannel:
-                            break
-                        else:
-                            raise RuntimeError(
-                                'aio channel never stopped?'
-                            )
-
-    if raise_error_mid_stream:
-        with pytest.raises(raise_error_mid_stream):
-            tractor.to_asyncio.run_as_asyncio_guest(
-                trio_main=_trio_main,
-            )
-    else:
-        tractor.to_asyncio.run_as_asyncio_guest(
-            trio_main=_trio_main,
-        )
-
-
-
-async def sync_and_err(
-    # just signature placeholders for compat with
-    # ``to_asyncio.open_channel_from()``
-    to_trio: trio.MemorySendChannel,
-    from_trio: asyncio.Queue,
-    ev: asyncio.Event,
-
-):
-    if to_trio:
-        to_trio.send_nowait('start')
-
-    await ev.wait()
-    raise RuntimeError('asyncio-side')
-
-
-@pytest.mark.parametrize(
-    'aio_err_trigger',
-    [
-        'before_start_point',
-        'after_trio_task_starts',
-        'after_start_point',
-    ],
-    ids='aio_err_triggered={}'.format
-)
-def test_trio_prestarted_task_bubbles(
-    aio_err_trigger: str,
-
-    # conftest wide
-    loglevel: str,
-    debug_mode: bool,
-):
-    async def pre_started_err(
-        raise_err: bool = False,
-        pre_sleep: float|None = None,
-        aio_trigger: asyncio.Event|None = None,
-        task_status=trio.TASK_STATUS_IGNORED,
-    ):
-        '''
-        Maybe pre-started error then sleep.
-
-        '''
-        if pre_sleep is not None:
-            print(f'Sleeping from trio for {pre_sleep!r}s !')
-            await trio.sleep(pre_sleep)
-
-        # signal aio-task to raise JUST AFTER this task
-        # starts but has not yet `.started()`
-        if aio_trigger:
-            print('Signalling aio-task to raise from `trio`!!')
-            aio_trigger.set()
-
-        if raise_err:
-            print('Raising from trio!')
-            raise TypeError('trio-side')
-
-        task_status.started()
-        await trio.sleep_forever()
-
-    async def _trio_main():
-        # with trio.fail_after(2):
-        with trio.fail_after(999):
-            first: str
-            chan: to_asyncio.LinkedTaskChannel
-            aio_ev = asyncio.Event()
-
-            async with (
-                tractor.open_root_actor(
-                    debug_mode=False,
-                    loglevel=loglevel,
-                ),
-            ):
-                # TODO, tests for this with 3.13 egs?
-                # from tractor.devx import open_crash_handler
-                # with open_crash_handler():
-                async with (
-                    # where we'll start a sub-task that errors BEFORE
-                    # calling `.started()` such that the error should
-                    # bubble before the guest run terminates!
-                    trio.open_nursery() as tn,
-
-                    # THEN start an infect task which should error just
-                    # after the trio-side's task does.
-                    to_asyncio.open_channel_from(
-                        partial(
-                            sync_and_err,
-                            ev=aio_ev,
-                        )
-                    ) as (first, chan),
-                ):
-
-                    for i in range(5):
-                        pre_sleep: float|None = None
-                        last_iter: bool = (i == 4)
-
-                        # TODO, missing cases?
-                        # -[ ] error as well on
-                        #    'after_start_point' case as well for
-                        #    another case?
-                        raise_err: bool = False
-
-                        if last_iter:
-                            raise_err: bool = True
-
-                            # trigger aio task to error on next loop
-                            # tick/checkpoint
-                            if aio_err_trigger == 'before_start_point':
-                                aio_ev.set()
-
-                            pre_sleep: float = 0
-
-                        await tn.start(
-                            pre_started_err,
-                            raise_err,
-                            pre_sleep,
-                            (aio_ev if (
-                                    aio_err_trigger == 'after_trio_task_starts'
-                                    and
-                                    last_iter
-                                ) else None
-                            ),
-                        )
-
-                        if (
-                            aio_err_trigger == 'after_start_point'
-                            and
-                            last_iter
-                        ):
-                            aio_ev.set()
-
-    with pytest.raises(
-        expected_exception=ExceptionGroup,
-    ) as excinfo:
-        tractor.to_asyncio.run_as_asyncio_guest(
-            trio_main=_trio_main,
-        )
-
-    eg = excinfo.value
-    rte_eg, rest_eg = eg.split(RuntimeError)
-
-    # ensure the trio-task's error bubbled despite the aio-side
-    # having (maybe) errored first.
-    if aio_err_trigger in (
-        'after_trio_task_starts',
-        'after_start_point',
-    ):
-        assert len(errs := rest_eg.exceptions) == 1
-        typerr = errs[0]
-        assert (
-            type(typerr) is TypeError
-            and
-            'trio-side' in typerr.args
-        )
-
-    # when aio errors BEFORE (last) trio task is scheduled, we should
-    # never see anythinb but the aio-side.
-    else:
-        assert len(rtes := rte_eg.exceptions) == 1
-        assert 'asyncio-side' in rtes[0].args[0]

tests/test_task_broadcasting.py

@@ -2,9 +2,7 @@
 Broadcast channels for fan-out to local tasks.
 
 """
-from contextlib import (
+from contextlib import asynccontextmanager
-    asynccontextmanager as acm,
-)
 from functools import partial
 from itertools import cycle
 import time
@@ -17,7 +15,6 @@ import tractor
 from tractor.trionics import (
     broadcast_receiver,
     Lagged,
-    collapse_eg,
 )
 
 
@@ -65,7 +62,7 @@ async def ensure_sequence(
                 break
 
 
-@acm
+@asynccontextmanager
 async def open_sequence_streamer(
 
     sequence: list[int],
@@ -77,9 +74,9 @@ async def open_sequence_streamer(
     async with tractor.open_nursery(
         arbiter_addr=reg_addr,
         start_method=start_method,
-    ) as an:
+    ) as tn:
 
-        portal = await an.start_actor(
+        portal = await tn.start_actor(
             'sequence_echoer',
             enable_modules=[__name__],
         )
@@ -158,12 +155,9 @@ def test_consumer_and_parent_maybe_lag(
         ) as stream:
 
             try:
-                async with (
+                async with trio.open_nursery() as n:
-                    collapse_eg(),
-                    trio.open_nursery() as tn,
-                ):
 
-                    tn.start_soon(
+                    n.start_soon(
                         ensure_sequence,
                         stream,
                         sequence.copy(),
@@ -236,8 +230,8 @@ def test_faster_task_to_recv_is_cancelled_by_slower(
 
         ) as stream:
 
-            async with trio.open_nursery() as tn:
+            async with trio.open_nursery() as n:
-                tn.start_soon(
+                n.start_soon(
                     ensure_sequence,
                     stream,
                     sequence.copy(),
@@ -259,7 +253,7 @@ def test_faster_task_to_recv_is_cancelled_by_slower(
                         continue
 
                 print('cancelling faster subtask')
-                tn.cancel_scope.cancel()
+                n.cancel_scope.cancel()
 
             try:
                 value = await stream.receive()
@@ -277,7 +271,7 @@ def test_faster_task_to_recv_is_cancelled_by_slower(
                         # the faster subtask was cancelled
                         break
 
-                # await tractor.pause()
+                # await tractor.breakpoint()
                 # await stream.receive()
                 print(f'final value: {value}')
 
@@ -377,13 +371,13 @@ def test_ensure_slow_consumers_lag_out(
                                     f'on {lags}:{value}')
                                 return
 
-            async with trio.open_nursery() as tn:
+            async with trio.open_nursery() as nursery:
 
                 for i in range(1, num_laggers):
 
                     task_name = f'sub_{i}'
                     laggers[task_name] = 0
-                    tn.start_soon(
+                    nursery.start_soon(
                         partial(
                             sub_and_print,
                             delay=i*0.001,
@@ -503,7 +497,6 @@ def test_no_raise_on_lag():
                 # internals when the no raise flag is set.
                 loglevel='warning',
             ),
-            collapse_eg(),
             trio.open_nursery() as n,
         ):
             n.start_soon(slow)

tests/test_trioisms.py

@@ -3,10 +3,6 @@ Reminders for oddities in `trio` that we need to stay aware of and/or
 want to see changed.
 
 '''
-from contextlib import (
-    asynccontextmanager as acm,
-)
-
 import pytest
 import trio
 from trio import TaskStatus
@@ -64,9 +60,7 @@ def test_stashed_child_nursery(use_start_soon):
     async def main():
 
         async with (
-            trio.open_nursery(
+            trio.open_nursery() as pn,
-                strict_exception_groups=False,
-            ) as pn,
         ):
             cn = await pn.start(mk_child_nursery)
             assert cn
@@ -86,118 +80,3 @@ def test_stashed_child_nursery(use_start_soon):
 
     with pytest.raises(NameError):
         trio.run(main)
-
-
-@pytest.mark.parametrize(
-    ('unmask_from_canc', 'canc_from_finally'),
-    [
-        (True, False),
-        (True, True),
-        pytest.param(False, True,
-                     marks=pytest.mark.xfail(reason="never raises!")
-        ),
-    ],
-    # TODO, ask ronny how to impl this .. XD
-    # ids='unmask_from_canc={0}, canc_from_finally={1}',#.format,
-)
-def test_acm_embedded_nursery_propagates_enter_err(
-    canc_from_finally: bool,
-    unmask_from_canc: bool,
-    debug_mode: bool,
-):
-    '''
-    Demo how a masking `trio.Cancelled` could be handled by unmasking from the
-    `.__context__` field when a user (by accident) re-raises from a `finally:`.
-
-    '''
-    import tractor
-
-    @acm
-    async def maybe_raise_from_masking_exc(
-        tn: trio.Nursery,
-        unmask_from: BaseException|None = trio.Cancelled
-
-        # TODO, maybe offer a collection?
-        # unmask_from: set[BaseException] = {
-        #     trio.Cancelled,
-        # },
-    ):
-        if not unmask_from:
-            yield
-            return
-
-        try:
-            yield
-        except* unmask_from as be_eg:
-
-            # TODO, if we offer `unmask_from: set`
-            # for masker_exc_type in unmask_from:
-
-            matches, rest = be_eg.split(unmask_from)
-            if not matches:
-                raise
-
-            for exc_match in be_eg.exceptions:
-                if (
-                    (exc_ctx := exc_match.__context__)
-                    and
-                    type(exc_ctx) not in {
-                        # trio.Cancelled,  # always by default?
-                        unmask_from,
-                    }
-                ):
-                    exc_ctx.add_note(
-                        f'\n'
-                        f'WARNING: the above error was masked by a {unmask_from!r} !?!\n'
-                        f'Are you always cancelling? Say from a `finally:` ?\n\n'
-
-                        f'{tn!r}'
-                    )
-                    raise exc_ctx from exc_match
-
-
-    @acm
-    async def wraps_tn_that_always_cancels():
-        async with (
-            trio.open_nursery() as tn,
-            maybe_raise_from_masking_exc(
-                tn=tn,
-                unmask_from=(
-                    trio.Cancelled
-                    if unmask_from_canc
-                    else None
-                ),
-            )
-        ):
-            try:
-                yield tn
-            finally:
-                if canc_from_finally:
-                    tn.cancel_scope.cancel()
-                    await trio.lowlevel.checkpoint()
-
-    async def _main():
-        with tractor.devx.maybe_open_crash_handler(
-            pdb=debug_mode,
-        ) as bxerr:
-            assert not bxerr.value
-
-            async with (
-                wraps_tn_that_always_cancels() as tn,
-            ):
-                assert not tn.cancel_scope.cancel_called
-                assert 0
-
-        assert (
-            (err := bxerr.value)
-            and
-            type(err) is AssertionError
-        )
-
-    with pytest.raises(ExceptionGroup) as excinfo:
-        trio.run(_main)
-
-    eg: ExceptionGroup = excinfo.value
-    assert_eg, rest_eg = eg.split(AssertionError)
-
-    assert len(assert_eg.exceptions) == 1

tractor/__init__.py

@@ -44,7 +44,6 @@ from ._state import (
     current_actor as current_actor,
     is_root_process as is_root_process,
     current_ipc_ctx as current_ipc_ctx,
-    debug_mode as debug_mode
 )
 from ._exceptions import (
     ContextCancelled as ContextCancelled,
@@ -67,4 +66,3 @@ from ._root import (
 from ._ipc import Channel as Channel
 from ._portal import Portal as Portal
 from ._runtime import Actor as Actor
-# from . import hilevel as hilevel

tractor/_clustering.py

@@ -19,13 +19,10 @@ Actor cluster helpers.
 
 '''
 from __future__ import annotations
-from contextlib import (
+
-    asynccontextmanager as acm,
+from contextlib import asynccontextmanager as acm
-)
 from multiprocessing import cpu_count
-from typing import (
+from typing import AsyncGenerator, Optional
-    AsyncGenerator,
-)
 
 import trio
 import tractor

tractor/_context.py

@@ -47,9 +47,6 @@ from functools import partial
 import inspect
 from pprint import pformat
 import textwrap
-from types import (
-    UnionType,
-)
 from typing import (
     Any,
     AsyncGenerator,
@@ -82,7 +79,6 @@ from .msg import (
     MsgType,
     NamespacePath,
     PayloadT,
-    Return,
     Started,
     Stop,
     Yield,
@@ -246,13 +242,11 @@ class Context:
     # a drain loop?
     # _res_scope: trio.CancelScope|None = None
 
-    _outcome_msg: Return|Error|ContextCancelled = Unresolved
-
     # on a clean exit there should be a final value
     # delivered from the far end "callee" task, so
     # this value is only set on one side.
     # _result: Any | int = None
-    _result: PayloadT|Unresolved = Unresolved
+    _result: Any|Unresolved = Unresolved
 
     # if the local "caller"  task errors this value is always set
     # to the error that was captured in the
@@ -956,7 +950,7 @@ class Context:
             # f'Context.cancel() => {self.chan.uid}\n'
             f'c)=> {self.chan.uid}\n'
             # f'{self.chan.uid}\n'
-            f'  |_ @{self.dst_maddr}\n'
+            f' |_ @{self.dst_maddr}\n'
             f'    >> {self.repr_rpc}\n'
             # f'    >> {self._nsf}() -> {codec}[dict]:\n\n'
             # TODO: pull msg-type from spec re #320
@@ -1009,8 +1003,7 @@ class Context:
                     )
                 else:
                     log.cancel(
-                        f'Timed out on cancel request of remote task?\n'
+                        'Timed out on cancel request of remote task?\n'
-                        f'\n'
                         f'{reminfo}'
                     )
 
@@ -1202,11 +1195,9 @@ class Context:
 
         '''
         __tracebackhide__: bool = hide_tb
-        if not self._portal:
+        assert self._portal, (
-            raise RuntimeError(
+            '`Context.wait_for_result()` can not be called from callee side!'
-                'Invalid usage of `Context.wait_for_result()`!\n'
+        )
-                'Not valid on child-side IPC ctx!\n'
-            )
         if self._final_result_is_set():
             return self._result
 
@@ -1227,8 +1218,6 @@ class Context:
             # since every message should be delivered via the normal
             # `._deliver_msg()` route which will appropriately set
             # any `.maybe_error`.
-            outcome_msg: Return|Error|ContextCancelled
-            drained_msgs: list[MsgType]
             (
                 outcome_msg,
                 drained_msgs,
@@ -1236,19 +1225,11 @@ class Context:
                 ctx=self,
                 hide_tb=hide_tb,
             )
+
             drained_status: str = (
                 'Ctx drained to final outcome msg\n\n'
                 f'{outcome_msg}\n'
             )
-
-            # ?XXX, should already be set in `._deliver_msg()` right?
-            if self._outcome_msg is not Unresolved:
-                # from .devx import _debug
-                # await _debug.pause()
-                assert self._outcome_msg is outcome_msg
-            else:
-                self._outcome_msg = outcome_msg
-
             if drained_msgs:
                 drained_status += (
                     '\n'
@@ -1579,12 +1560,12 @@ class Context:
                     strict_pld_parity=strict_pld_parity,
                     hide_tb=hide_tb,
                 )
-            except BaseException as _bexc:
+            except BaseException as err:
-                err = _bexc
                 if not isinstance(err, MsgTypeError):
                     __tracebackhide__: bool = False
 
-                raise err
+                raise
+
 
         # TODO: maybe a flag to by-pass encode op if already done
         # here in caller?
@@ -1722,28 +1703,15 @@ class Context:
         # TODO: expose as mod func instead!
         structfmt = pretty_struct.Struct.pformat
         if self._in_overrun:
-            report: str = (
+            log.warning(
+                f'Queueing OVERRUN msg on caller task:\n\n'
+
                 f'{flow_body}'
+
                 f'{structfmt(msg)}\n'
             )
-            over_q: deque = self._overflow_q
             self._overflow_q.append(msg)
 
-            if len(over_q) == over_q.maxlen:
-                report = (
-                    'FAILED to queue OVERRUN msg, OVERAN the OVERRUN QUEUE !!\n\n'
-                    + report
-                )
-                # log.error(report)
-                log.debug(report)
-
-            else:
-                report = (
-                    'Queueing OVERRUN msg on caller task:\n\n'
-                    + report
-                )
-                log.debug(report)
-
             # XXX NOTE XXX
             # overrun is the ONLY case where returning early is fine!
             return False
@@ -1756,6 +1724,7 @@ class Context:
 
                 f'{structfmt(msg)}\n'
             )
+
             # NOTE: if an error is deteced we should always still
             # send it through the feeder-mem-chan and expect
             # it to be raised by any context (stream) consumer
@@ -1767,21 +1736,6 @@ class Context:
             # normally the task that should get cancelled/error
             # from some remote fault!
             send_chan.send_nowait(msg)
-            match msg:
-                case Stop():
-                    if (stream := self._stream):
-                        stream._stop_msg = msg
-
-                case Return():
-                    if not self._outcome_msg:
-                        log.warning(
-                            f'Setting final outcome msg AFTER '
-                            f'`._rx_chan.send()`??\n'
-                            f'\n'
-                            f'{msg}'
-                        )
-                        self._outcome_msg = msg
-
             return True
 
         except trio.BrokenResourceError:
@@ -2015,10 +1969,7 @@ async def open_context_from_portal(
     ctxc_from_callee: ContextCancelled|None = None
     try:
         async with (
-            trio.open_nursery(
+            trio.open_nursery() as tn,
-                strict_exception_groups=False,
-            ) as tn,
-
             msgops.maybe_limit_plds(
                 ctx=ctx,
                 spec=ctx_meta.get('pld_spec'),
@@ -2038,7 +1989,7 @@ async def open_context_from_portal(
             # the dialog, the `Error` msg should be raised from the `msg`
             # handling block below.
             try:
-                started_msg, first = await ctx._pld_rx.recv_msg(
+                started_msg, first = await ctx._pld_rx.recv_msg_w_pld(
                     ipc=ctx,
                     expect_msg=Started,
                     passthrough_non_pld_msgs=False,
@@ -2403,8 +2354,7 @@ async def open_context_from_portal(
             # displaying `ContextCancelled` traces where the
             # cause of crash/exit IS due to something in
             # user/app code on either end of the context.
-            and
+            and not rxchan._closed
-            not rxchan._closed
         ):
             # XXX NOTE XXX: and again as per above, we mask any
             # `trio.Cancelled` raised here so as to NOT mask
@@ -2463,7 +2413,6 @@ async def open_context_from_portal(
         # FINALLY, remove the context from runtime tracking and
         # exit!
         log.runtime(
-        # log.cancel(
             f'De-allocating IPC ctx opened with {ctx.side!r} peer \n'
             f'uid: {uid}\n'
             f'cid: {ctx.cid}\n'
@@ -2519,6 +2468,7 @@ def mk_context(
         _caller_info=caller_info,
         **kwargs,
     )
+    pld_rx._ctx = ctx
     ctx._result = Unresolved
     return ctx
 
@@ -2581,14 +2531,7 @@ def context(
     name: str
     param: Type
     for name, param in annots.items():
-        if (
+        if param is Context:
-            param is Context
-            or (
-                isinstance(param, UnionType)
-                and
-                Context in param.__args__
-            )
-        ):
             ctx_var_name: str = name
             break
     else:

tractor/_entry.py

@@ -20,7 +20,6 @@ Sub-process entry points.
 """
 from __future__ import annotations
 from functools import partial
-import multiprocessing as mp
 import os
 import textwrap
 from typing import (
@@ -65,22 +64,20 @@ def _mp_main(
     '''
     actor._forkserver_info = forkserver_info
     from ._spawn import try_set_start_method
-    spawn_ctx: mp.context.BaseContext = try_set_start_method(start_method)
+    spawn_ctx = try_set_start_method(start_method)
-    assert spawn_ctx
 
     if actor.loglevel is not None:
         log.info(
-            f'Setting loglevel for {actor.uid} to {actor.loglevel}'
+            f"Setting loglevel for {actor.uid} to {actor.loglevel}")
-        )
         get_console_log(actor.loglevel)
 
-    # TODO: use scops headers like for `trio` below!
+    assert spawn_ctx
-    # (well after we libify it maybe..)
     log.info(
-        f'Started new {spawn_ctx.current_process()} for {actor.uid}'
+        f"Started new {spawn_ctx.current_process()} for {actor.uid}")
-    #     f"parent_addr is {parent_addr}"
+
-    )
+    _state._current_actor = actor
-    _state._current_actor: Actor = actor
+
+    log.debug(f"parent_addr is {parent_addr}")
     trio_main = partial(
         async_main,
         actor=actor,
@@ -97,9 +94,7 @@ def _mp_main(
         pass  # handle it the same way trio does?
 
     finally:
-        log.info(
+        log.info(f"Subactor {actor.uid} terminated")
-            f'`mp`-subactor {actor.uid} exited'
-        )
 
 
 # TODO: move this func to some kinda `.devx._conc_lang.py` eventually
@@ -238,7 +233,7 @@ def _trio_main(
             nest_from_op(
                 input_op='>(',  # see syntax ideas above
                 tree_str=actor_info,
-                back_from_op=2,  # since "complete"
+                back_from_op=1,
             )
         )
     logmeth = log.info

tractor/_exceptions.py

@@ -22,7 +22,6 @@ from __future__ import annotations
 import builtins
 import importlib
 from pprint import pformat
-from pdb import bdb
 import sys
 from types import (
     TracebackType,
@@ -83,48 +82,6 @@ class InternalError(RuntimeError):
 
     '''
 
-class AsyncioCancelled(Exception):
-    '''
-    Asyncio cancelled translation (non-base) error
-    for use with the ``to_asyncio`` module
-    to be raised in the ``trio`` side task
-
-    NOTE: this should NOT inherit from `asyncio.CancelledError` or
-    tests should break!
-
-    '''
-
-
-class AsyncioTaskExited(Exception):
-    '''
-    asyncio.Task "exited" translation error for use with the
-    `to_asyncio` APIs to be raised in the `trio` side task indicating
-    on `.run_task()`/`.open_channel_from()` exit that the aio side
-    exited early/silently.
-
-    '''
-
-class TrioCancelled(Exception):
-    '''
-    Trio cancelled translation (non-base) error
-    for use with the `to_asyncio` module
-    to be raised in the `asyncio.Task` to indicate
-    that the `trio` side raised `Cancelled` or an error.
-
-    '''
-
-class TrioTaskExited(Exception):
-    '''
-    The `trio`-side task exited without explicitly cancelling the
-    `asyncio.Task` peer.
-
-    This is very similar to how `trio.ClosedResource` acts as
-    a "clean shutdown" signal to the consumer side of a mem-chan,
-
-    https://trio.readthedocs.io/en/stable/reference-core.html#clean-shutdown-with-channels
-
-    '''
-
 
 # NOTE: more or less should be close to these:
 # 'boxed_type',
@@ -170,8 +127,8 @@ _body_fields: list[str] = list(
 
 def get_err_type(type_name: str) -> BaseException|None:
     '''
-    Look up an exception type by name from the set of locally known
+    Look up an exception type by name from the set of locally
-    namespaces:
+    known namespaces:
 
     - `builtins`
     - `tractor._exceptions`
@@ -182,7 +139,6 @@ def get_err_type(type_name: str) -> BaseException|None:
         builtins,
         _this_mod,
         trio,
-        bdb,
     ]:
         if type_ref := getattr(
             ns,
@@ -402,13 +358,6 @@ class RemoteActorError(Exception):
                 self._ipc_msg.src_type_str
             )
 
-            if not self._src_type:
-                raise TypeError(
-                    f'Failed to lookup src error type with '
-                    f'`tractor._exceptions.get_err_type()` :\n'
-                    f'{self.src_type_str}'
-                )
-
         return self._src_type
 
     @property
@@ -417,9 +366,6 @@ class RemoteActorError(Exception):
         String-name of the (last hop's) boxed error type.
 
         '''
-        # TODO, maybe support also serializing the
-        # `ExceptionGroup.exeptions: list[BaseException]` set under
-        # certain conditions?
         bt: Type[BaseException] = self.boxed_type
         if bt:
             return str(bt.__name__)
@@ -432,13 +378,9 @@ class RemoteActorError(Exception):
         Error type boxed by last actor IPC hop.
 
         '''
-        if (
+        if self._boxed_type is None:
-            self._boxed_type is None
-            and
-            (ipc_msg := self._ipc_msg)
-        ):
             self._boxed_type = get_err_type(
-                ipc_msg.boxed_type_str
+                self._ipc_msg.boxed_type_str
             )
 
         return self._boxed_type
@@ -667,7 +609,6 @@ class RemoteActorError(Exception):
                 # just after <Type(
                 #             |___ ..
                 tb_body_indent=1,
-                boxer_header=self.relay_uid,
             )
 
         tail = ''
@@ -710,10 +651,16 @@ class RemoteActorError(Exception):
         failing actor's remote env.
 
         '''
+        src_type_ref: Type[BaseException] = self.src_type
+        if not src_type_ref:
+            raise TypeError(
+                'Failed to lookup src error type:\n'
+                f'{self.src_type_str}'
+            )
+
         # TODO: better tb insertion and all the fancier dunder
         # metadata stuff as per `.__context__` etc. and friends:
         # https://github.com/python-trio/trio/issues/611
-        src_type_ref: Type[BaseException] = self.src_type
         return src_type_ref(self.tb_str)
 
     # TODO: local recontruction of nested inception for a given
@@ -839,11 +786,8 @@ class MsgTypeError(
         '''
         if (
             (_bad_msg := self.msgdata.get('_bad_msg'))
-            and (
+            and
-                isinstance(_bad_msg, PayloadMsg)
+            isinstance(_bad_msg, PayloadMsg)
-                or
-                isinstance(_bad_msg, msgtypes.Start)
-            )
         ):
             return _bad_msg
 
@@ -1029,6 +973,15 @@ class NoRuntime(RuntimeError):
     "The root actor has not been initialized yet"
 
 
+
+class AsyncioCancelled(Exception):
+    '''
+    Asyncio cancelled translation (non-base) error
+    for use with the ``to_asyncio`` module
+    to be raised in the ``trio`` side task
+
+    '''
+
 class MessagingError(Exception):
     '''
     IPC related msg (typing), transaction (ordering) or dialog
@@ -1036,6 +989,7 @@ class MessagingError(Exception):
 
     '''
 
+
 def pack_error(
     exc: BaseException|RemoteActorError,
 
@@ -1147,8 +1101,6 @@ def unpack_error(
     which is the responsibilitiy of the caller.
 
     '''
-    # XXX, apparently we pass all sorts of msgs here?
-    # kinda odd but seems like maybe they shouldn't be?
     if not isinstance(msg, Error):
         return None
 
@@ -1191,51 +1143,19 @@ def unpack_error(
 
 
 def is_multi_cancelled(
-    exc: BaseException|BaseExceptionGroup,
+    exc: BaseException|BaseExceptionGroup
-
+) -> bool:
-    ignore_nested: set[BaseException] = set(),
-
-) -> bool|BaseExceptionGroup:
     '''
-    Predicate to determine if an `BaseExceptionGroup` only contains
+    Predicate to determine if a possible ``BaseExceptionGroup`` contains
-    some (maybe nested) set of sub-grouped exceptions (like only
+    only ``trio.Cancelled`` sub-exceptions (and is likely the result of
-    `trio.Cancelled`s which get swallowed silently by default) and is
+    cancelling a collection of subtasks.
-    thus the result of "gracefully cancelling" a collection of
-    sub-tasks (or other conc primitives) and receiving a "cancelled
-    ACK" from each after termination.
-
-    Docs:
-    ----
-    - https://docs.python.org/3/library/exceptions.html#exception-groups
-    - https://docs.python.org/3/library/exceptions.html#BaseExceptionGroup.subgroup
 
     '''
-
-    if (
-        not ignore_nested
-        or
-        trio.Cancelled in ignore_nested
-        # XXX always count-in `trio`'s native signal
-    ):
-        ignore_nested.update({trio.Cancelled})
-
     if isinstance(exc, BaseExceptionGroup):
-        matched_exc: BaseExceptionGroup|None = exc.subgroup(
+        return exc.subgroup(
-            tuple(ignore_nested),
+            lambda exc: isinstance(exc, trio.Cancelled)
+        ) is not None
 
-            # TODO, complain about why not allowed XD
-            # condition=tuple(ignore_nested),
-        )
-        if matched_exc is not None:
-            return matched_exc
-
-    # NOTE, IFF no excs types match (throughout the error-tree)
-    # -> return `False`, OW return the matched sub-eg.
-    #
-    # IOW, for the inverse of ^ for the purpose of
-    # maybe-enter-REPL--logic: "only debug when the err-tree contains
-    # at least one exc-type NOT in `ignore_nested`" ; i.e. the case where
-    # we fallthrough and return `False` here.
     return False
 
 
@@ -1455,9 +1375,7 @@ def _mk_recv_mte(
         any_pld: Any = msgpack.decode(msg.pld)
         message: str = (
             f'invalid `{msg_type.__qualname__}` msg payload\n\n'
-            f'{any_pld!r}\n\n'
+            f'value: `{any_pld!r}` does not match type-spec: '
-            f'has type {type(any_pld)!r}\n\n'
-            f'and does not match type-spec '
             f'`{type(msg).__qualname__}.pld: {codec.pld_spec_str}`'
         )
         bad_msg = msg

tractor/_ipc.py

@@ -255,8 +255,8 @@ class MsgpackTCPStream(MsgTransport):
                 raise TransportClosed(
                     message=(
                         f'IPC transport already closed by peer\n'
-                        f'x]> {type(trans_err)}\n'
+                        f'x)> {type(trans_err)}\n'
-                        f'  |_{self}\n'
+                        f' |_{self}\n'
                     ),
                     loglevel=loglevel,
                 ) from trans_err
@@ -273,8 +273,8 @@ class MsgpackTCPStream(MsgTransport):
                 raise TransportClosed(
                     message=(
                         f'IPC transport already manually closed locally?\n'
-                        f'x]> {type(closure_err)} \n'
+                        f'x)> {type(closure_err)} \n'
-                        f'  |_{self}\n'
+                        f' |_{self}\n'
                     ),
                     loglevel='error',
                     raise_on_report=(
@@ -289,8 +289,8 @@ class MsgpackTCPStream(MsgTransport):
                 raise TransportClosed(
                     message=(
                         f'IPC transport already gracefully closed\n'
-                        f']>\n'
+                        f')>\n'
-                        f' |_{self}\n'
+                        f'|_{self}\n'
                     ),
                     loglevel='transport',
                     # cause=???  # handy or no?

tractor/_portal.py

@@ -184,7 +184,7 @@ class Portal:
                 (
                     self._final_result_msg,
                     self._final_result_pld,
-                ) = await self._expect_result_ctx._pld_rx.recv_msg(
+                ) = await self._expect_result_ctx._pld_rx.recv_msg_w_pld(
                     ipc=self._expect_result_ctx,
                     expect_msg=Return,
                 )
@@ -533,10 +533,6 @@ async def open_portal(
     async with maybe_open_nursery(
         tn,
         shield=shield,
-        strict_exception_groups=False,
-        # ^XXX^ TODO? soo roll our own then ??
-        # -> since we kinda want the "if only one `.exception` then
-        # just raise that" interface?
     ) as tn:
 
         if not channel.connected():

tractor/_root.py

@@ -80,7 +80,7 @@ async def open_root_actor(
 
     # enables the multi-process debugger support
     debug_mode: bool = False,
-    maybe_enable_greenback: bool = True,  # `.pause_from_sync()/breakpoint()` support
+    maybe_enable_greenback: bool = False,  # `.pause_from_sync()/breakpoint()` support
     enable_stack_on_sig: bool = False,
 
     # internal logging
@@ -95,24 +95,13 @@ async def open_root_actor(
 
     hide_tb: bool = True,
 
-    # XXX, proxied directly to `.devx._debug._maybe_enter_pm()`
-    # for REPL-entry logic.
-    debug_filter: Callable[
-        [BaseException|BaseExceptionGroup],
-        bool,
-    ] = lambda err: not is_multi_cancelled(err),
-
-    # TODO, a way for actors to augment passing derived
-    # read-only state to sublayers?
-    # extra_rt_vars: dict|None = None,
-
 ) -> Actor:
     '''
     Runtime init entry point for ``tractor``.
 
     '''
-    _debug.hide_runtime_frames()
     __tracebackhide__: bool = hide_tb
+    _debug.hide_runtime_frames()
 
     # TODO: stick this in a `@cm` defined in `devx._debug`?
     #
@@ -244,8 +233,14 @@ async def open_root_actor(
         and
         enable_stack_on_sig
     ):
-        from .devx._stackscope import enable_stack_on_sig
+        try:
-        enable_stack_on_sig()
+            logger.info('Enabling `stackscope` traces on SIGUSR1')
+            from .devx import enable_stack_on_sig
+            enable_stack_on_sig()
+        except ImportError:
+            logger.warning(
+                '`stackscope` not installed for use in debug mode!'
+            )
 
     # closed into below ping task-func
     ponged_addrs: list[tuple[str, int]] = []
@@ -341,10 +336,6 @@ async def open_root_actor(
             loglevel=loglevel,
             enable_modules=enable_modules,
         )
-        # XXX, in case the root actor runtime was actually run from
-        # `tractor.to_asyncio.run_as_asyncio_guest()` and NOt
-        # `.trio.run()`.
-        actor._infected_aio = _state._runtime_vars['_is_infected_aio']
 
     # Start up main task set via core actor-runtime nurseries.
     try:
@@ -362,10 +353,7 @@ async def open_root_actor(
         )
 
         # start the actor runtime in a new task
-        async with trio.open_nursery(
+        async with trio.open_nursery() as nursery:
-            strict_exception_groups=False,
-            # ^XXX^ TODO? instead unpack any RAE as per "loose" style?
-        ) as nursery:
 
             # ``_runtime.async_main()`` creates an internal nursery
             # and blocks here until any underlying actor(-process)
@@ -389,13 +377,6 @@ async def open_root_actor(
                 Exception,
                 BaseExceptionGroup,
             ) as err:
-
-                # TODO, in beginning to handle the subsubactor with
-                # crashed grandparent cases..
-                #
-                # was_locked: bool = await _debug.maybe_wait_for_debugger(
-                #     child_in_debug=True,
-                # )
                 # XXX NOTE XXX see equiv note inside
                 # `._runtime.Actor._stream_handler()` where in the
                 # non-root or root-that-opened-this-mahually case we
@@ -404,15 +385,11 @@ async def open_root_actor(
                 entered: bool = await _debug._maybe_enter_pm(
                     err,
                     api_frame=inspect.currentframe(),
-                    debug_filter=debug_filter,
                 )
-
                 if (
                     not entered
                     and
-                    not is_multi_cancelled(
+                    not is_multi_cancelled(err)
-                        err,
-                    )
                 ):
                     logger.exception('Root actor crashed\n')
 
@@ -466,19 +443,12 @@ def run_daemon(
 
     start_method: str | None = None,
     debug_mode: bool = False,
-
-    # TODO, support `infected_aio=True` mode by,
-    # - calling the appropriate entrypoint-func from `.to_asyncio`
-    # - maybe init-ing `greenback` as done above in
-    #   `open_root_actor()`.
-
     **kwargs
 
 ) -> None:
     '''
-    Spawn a root (daemon) actor which will respond to RPC; the main
+    Spawn daemon actor which will respond to RPC; the main task simply
-    task simply starts the runtime and then blocks via embedded
+    starts the runtime and then sleeps forever.
-    `trio.sleep_forever()`.
 
     This is a very minimal convenience wrapper around starting
     a "run-until-cancelled" root actor which can be started with a set
@@ -491,6 +461,7 @@ def run_daemon(
         importlib.import_module(path)
 
     async def _main():
+
         async with open_root_actor(
             registry_addrs=registry_addrs,
             name=name,

tractor/_rpc.py

@@ -620,11 +620,7 @@ async def _invoke(
             tn: trio.Nursery
             rpc_ctx_cs: CancelScope
             async with (
-                trio.open_nursery(
+                trio.open_nursery() as tn,
-                    strict_exception_groups=False,
-                    # ^XXX^ TODO? instead unpack any RAE as per "loose" style?
-
-                ) as tn,
                 msgops.maybe_limit_plds(
                     ctx=ctx,
                     spec=ctx_meta.get('pld_spec'),
@@ -649,10 +645,6 @@ async def _invoke(
                 )
                 # set and shuttle final result to "parent"-side task.
                 ctx._result = res
-                log.runtime(
-                    f'Sending result msg and exiting {ctx.side!r}\n'
-                    f'{return_msg}\n'
-                )
                 await chan.send(return_msg)
 
             # NOTE: this happens IFF `ctx._scope.cancel()` is
@@ -741,8 +733,8 @@ async def _invoke(
         # XXX: do we ever trigger this block any more?
         except (
             BaseExceptionGroup,
-            BaseException,
             trio.Cancelled,
+            BaseException,
 
         ) as scope_error:
             if (
@@ -855,8 +847,8 @@ async def try_ship_error_to_remote(
             log.critical(
                 'IPC transport failure -> '
                 f'failed to ship error to {remote_descr}!\n\n'
-                f'{type(msg)!r}[{msg.boxed_type_str}] X=> {channel.uid}\n'
+                f'X=> {channel.uid}\n\n'
-                f'\n'
+
                 # TODO: use `.msg.preetty_struct` for this!
                 f'{msg}\n'
             )

tractor/_runtime.py

@@ -59,7 +59,6 @@ from types import ModuleType
 import warnings
 
 import trio
-from trio._core import _run as trio_runtime
 from trio import (
     CancelScope,
     Nursery,
@@ -81,7 +80,6 @@ from ._context import (
 from .log import get_logger
 from ._exceptions import (
     ContextCancelled,
-    InternalError,
     ModuleNotExposed,
     MsgTypeError,
     unpack_error,
@@ -100,7 +98,6 @@ from ._rpc import (
 
 if TYPE_CHECKING:
     from ._supervise import ActorNursery
-    from trio._channel import MemoryChannelState
 
 
 log = get_logger('tractor')
@@ -836,10 +833,8 @@ class Actor:
             )]
         except KeyError:
             report: str = (
-                'Ignoring invalid IPC msg!?\n'
+                'Ignoring invalid IPC ctx msg!\n\n'
-                f'Ctx seems to not/no-longer exist??\n'
+                f'<=? {uid}\n\n'
-                f'\n'
-                f'<=? {uid}\n'
                 f'  |_{pretty_struct.pformat(msg)}\n'
             )
             match msg:
@@ -901,15 +896,11 @@ class Actor:
                 f'peer: {chan.uid}\n'
                 f'cid:{cid}\n'
             )
-            ctx._allow_overruns: bool = allow_overruns
+            ctx._allow_overruns = allow_overruns
 
             # adjust buffer size if specified
-            state: MemoryChannelState  = ctx._send_chan._state  # type: ignore
+            state = ctx._send_chan._state  # type: ignore
-            if (
+            if msg_buffer_size and state.max_buffer_size != msg_buffer_size:
-                msg_buffer_size
-                and
-                state.max_buffer_size != msg_buffer_size
-            ):
                 state.max_buffer_size = msg_buffer_size
 
         except KeyError:
@@ -1103,36 +1094,7 @@ class Actor:
                                 '`tractor.pause_from_sync()` not available!'
                             )
 
-                # XXX ensure the "infected `asyncio` mode" setting
+                rvs['_is_root'] = False
-                # passed down from our spawning parent is consistent
-                # with `trio`-runtime initialization:
-                # - during sub-proc boot, the entrypoint func
-                #   (`._entry.<spawn_backend>_main()`) should set
-                #   `._infected_aio = True` before calling
-                #   `run_as_asyncio_guest()`,
-                # - the value of `infect_asyncio: bool = True` as
-                #   passed to `ActorNursery.start_actor()` must be
-                #   the same as `_runtime_vars['_is_infected_aio']`
-                if (
-                    (aio_rtv := rvs['_is_infected_aio'])
-                    !=
-                    (aio_attr := self._infected_aio)
-                ):
-                    raise InternalError(
-                        'Parent sent runtime-vars that mismatch for the '
-                        '"infected `asyncio` mode" settings ?!?\n\n'
-
-                        f'rvs["_is_infected_aio"] = {aio_rtv}\n'
-                        f'self._infected_aio = {aio_attr}\n'
-                    )
-                if aio_rtv:
-                    assert trio_runtime.GLOBAL_RUN_CONTEXT.runner.is_guest
-                    # ^TODO^ possibly add a `sniffio` or
-                    # `trio` pub-API for `is_guest_mode()`?
-
-                rvs['_is_root'] = False  # obvi XD
-
-                # update process-wide globals
                 _state._runtime_vars.update(rvs)
 
                 # XXX: ``msgspec`` doesn't support serializing tuples
@@ -1285,8 +1247,7 @@ class Actor:
         msg: str = (
             f'Actor-runtime cancel request from {requester_type}\n\n'
             f'<=c) {requesting_uid}\n'
-            f'  |_{self}\n'
+            f' |_{self}\n'
-            f'\n'
         )
 
         # TODO: what happens here when we self-cancel tho?
@@ -1306,15 +1267,13 @@ class Actor:
                 lock_req_ctx.has_outcome
             ):
                 msg += (
-                    f'\n'
+                    '-> Cancelling active debugger request..\n'
-                    f'-> Cancelling active debugger request..\n'
                     f'|_{_debug.Lock.repr()}\n\n'
                     f'|_{lock_req_ctx}\n\n'
                 )
                 # lock_req_ctx._scope.cancel()
                 # TODO: wrap this in a method-API..
                 debug_req.req_cs.cancel()
-                # if lock_req_ctx:
 
             # self-cancel **all** ongoing RPC tasks
             await self.cancel_rpc_tasks(
@@ -1723,15 +1682,11 @@ async def async_main(
         # parent is kept alive as a resilient service until
         # cancellation steps have (mostly) occurred in
         # a deterministic way.
-        async with trio.open_nursery(
+        async with trio.open_nursery() as root_nursery:
-            strict_exception_groups=False,
-        ) as root_nursery:
             actor._root_n = root_nursery
             assert actor._root_n
 
-            async with trio.open_nursery(
+            async with trio.open_nursery() as service_nursery:
-                strict_exception_groups=False,
-            ) as service_nursery:
                 # This nursery is used to handle all inbound
                 # connections to us such that if the TCP server
                 # is killed, connections can continue to process

tractor/_spawn.py

@@ -327,10 +327,9 @@ async def soft_kill(
     uid: tuple[str, str] = portal.channel.uid
     try:
         log.cancel(
-            f'Soft killing sub-actor via portal request\n'
+            'Soft killing sub-actor via portal request\n'
-            f'\n'
+            f'c)> {portal.chan.uid}\n'
-            f'(c=> {portal.chan.uid}\n'
+            f' |_{proc}\n'
-            f'  |_{proc}\n'
         )
         # wait on sub-proc to signal termination
         await wait_func(proc)

tractor/_state.py

@@ -44,8 +44,6 @@ _runtime_vars: dict[str, Any] = {
     '_root_mailbox': (None, None),
     '_registry_addrs': [],
 
-    '_is_infected_aio': False,
-
     # for `tractor.pause_from_sync()` & `breakpoint()` support
     'use_greenback': False,
 }
@@ -72,8 +70,7 @@ def current_actor(
     '''
     if (
         err_on_no_runtime
-        and
+        and _current_actor is None
-        _current_actor is None
     ):
         msg: str = 'No local actor has been initialized yet?\n'
         from ._exceptions import NoRuntime
@@ -108,7 +105,6 @@ def is_main_process() -> bool:
     return mp.current_process().name == 'MainProcess'
 
 
-# TODO, more verby name?
 def debug_mode() -> bool:
     '''
     Bool determining if "debug mode" is on which enables

tractor/_streaming.py

@@ -45,11 +45,9 @@ from .trionics import (
     BroadcastReceiver,
 )
 from tractor.msg import (
-    Error,
+    # Return,
-    Return,
+    # Stop,
-    Stop,
     MsgType,
-    PayloadT,
     Yield,
 )
 
@@ -72,7 +70,8 @@ class MsgStream(trio.abc.Channel):
     A bidirectional message stream for receiving logically sequenced
     values over an inter-actor IPC `Channel`.
 
-
+    This is the type returned to a local task which entered either
+    `Portal.open_stream_from()` or `Context.open_stream()`.
 
     Termination rules:
 
@@ -95,9 +94,6 @@ class MsgStream(trio.abc.Channel):
         self._rx_chan = rx_chan
         self._broadcaster = _broadcaster
 
-        # any actual IPC msg which is effectively an `EndOfStream`
-        self._stop_msg: bool|Stop = False
-
         # flag to denote end of stream
         self._eoc: bool|trio.EndOfChannel = False
         self._closed: bool|trio.ClosedResourceError = False
@@ -129,67 +125,16 @@ class MsgStream(trio.abc.Channel):
     def receive_nowait(
         self,
         expect_msg: MsgType = Yield,
-    ) -> PayloadT:
+    ):
         ctx: Context = self._ctx
-        (
+        return ctx._pld_rx.recv_pld_nowait(
-            msg,
-            pld,
-        ) = ctx._pld_rx.recv_msg_nowait(
             ipc=self,
             expect_msg=expect_msg,
         )
 
-        # ?TODO, maybe factor this into a hyper-common `unwrap_pld()`
-        #
-        match msg:
-
-            # XXX, these never seems to ever hit? cool?
-            case Stop():
-                log.cancel(
-                    f'Msg-stream was ended via stop msg\n'
-                    f'{msg}'
-                )
-            case Error():
-                log.error(
-                    f'Msg-stream was ended via error msg\n'
-                    f'{msg}'
-                )
-
-            # XXX NOTE, always set any final result on the ctx to
-            # avoid teardown race conditions where previously this msg
-            # would be consumed silently (by `.aclose()` doing its
-            # own "msg drain loop" but WITHOUT those `drained: lists[MsgType]`
-            # being post-close-processed!
-            #
-            # !!TODO, see the equiv todo-comment in `.receive()`
-            # around the `if drained:` where we should prolly
-            # ACTUALLY be doing this post-close processing??
-            #
-            case Return(pld=pld):
-                log.warning(
-                    f'Msg-stream final result msg for IPC ctx?\n'
-                    f'{msg}'
-                )
-                # XXX TODO, this **should be covered** by higher
-                # scoped runtime-side method calls such as
-                # `Context._deliver_msg()`, so you should never
-                # really see the warning above or else something
-                # racy/out-of-order is likely going on between
-                # actor-runtime-side push tasks and the user-app-side
-                # consume tasks!
-                # -[ ] figure out that set of race cases and fix!
-                # -[ ] possibly return the `msg` given an input
-                #     arg-flag is set so we can process the `Return`
-                #     from the `.aclose()` caller?
-                #
-                # breakpoint()  # to debug this RACE CASE!
-                ctx._result = pld
-                ctx._outcome_msg = msg
-
-        return pld
-
     async def receive(
         self,
+
         hide_tb: bool = False,
     ):
         '''
@@ -209,7 +154,7 @@ class MsgStream(trio.abc.Channel):
         #     except trio.EndOfChannel:
         #         raise StopAsyncIteration
         #
-        # see `.aclose()` for notes on the old behaviour prior to
+        # see ``.aclose()`` for notes on the old behaviour prior to
         # introducing this
         if self._eoc:
             raise self._eoc
@@ -220,11 +165,7 @@ class MsgStream(trio.abc.Channel):
         src_err: Exception|None = None  # orig tb
         try:
             ctx: Context = self._ctx
-            pld = await ctx._pld_rx.recv_pld(
+            return await ctx._pld_rx.recv_pld(ipc=self)
-                ipc=self,
-                expect_msg=Yield,
-            )
-            return pld
 
         # XXX: the stream terminates on either of:
         # - `self._rx_chan.receive()` raising  after manual closure
@@ -233,7 +174,7 @@ class MsgStream(trio.abc.Channel):
         # - via a `Stop`-msg received from remote peer task.
         #   NOTE
         #   |_ previously this was triggered by calling
-        #   `._rx_chan.aclose()` on the send side of the channel
+        #   ``._rx_chan.aclose()`` on the send side of the channel
         #   inside `Actor._deliver_ctx_payload()`, but now the 'stop'
         #   message handling gets delegated to `PldRFx.recv_pld()`
         #   internals.
@@ -257,14 +198,11 @@ class MsgStream(trio.abc.Channel):
         # terminated and signal this local iterator to stop
         drained: list[Exception|dict] = await self.aclose()
         if drained:
-        #  ^^^^^^^^TODO? pass these to the `._ctx._drained_msgs:
+            # ?TODO? pass these to the `._ctx._drained_msgs: deque`
-        #  deque` and then iterate them as part of any
+            # and then iterate them as part of any `.wait_for_result()` call?
-        #  `.wait_for_result()` call?
+            #
-        #
+            # from .devx import pause
-        # -[ ] move the match-case processing from
+            # await pause()
-        #     `.receive_nowait()` instead to right here, use it from
-        #     a for msg in drained:` post-proc loop?
-        #
             log.warning(
                 'Drained context msgs during closure\n\n'
                 f'{drained}'
@@ -327,6 +265,9 @@ class MsgStream(trio.abc.Channel):
          - more or less we try to maintain adherance to trio's `.aclose()` semantics:
            https://trio.readthedocs.io/en/stable/reference-io.html#trio.abc.AsyncResource.aclose
         '''
+
+        # rx_chan = self._rx_chan
+
         # XXX NOTE XXX
         # it's SUPER IMPORTANT that we ensure we don't DOUBLE
         # DRAIN msgs on closure so avoid getting stuck handing on
@@ -338,16 +279,15 @@ class MsgStream(trio.abc.Channel):
             # this stream has already been closed so silently succeed as
             # per ``trio.AsyncResource`` semantics.
             # https://trio.readthedocs.io/en/stable/reference-io.html#trio.abc.AsyncResource.aclose
-            # import tractor
-            # await tractor.pause()
             return []
 
         ctx: Context = self._ctx
         drained: list[Exception|dict] = []
         while not drained:
             try:
-                maybe_final_msg: Yield|Return = self.receive_nowait(
+                maybe_final_msg = self.receive_nowait(
-                    expect_msg=Yield|Return,
+                    # allow_msgs=[Yield, Return],
+                    expect_msg=Yield,
                 )
                 if maybe_final_msg:
                     log.debug(
@@ -432,30 +372,18 @@ class MsgStream(trio.abc.Channel):
         #         await rx_chan.aclose()
 
         if not self._eoc:
-            this_side: str = self._ctx.side
-            peer_side: str = self._ctx.peer_side
             message: str = (
-                f'Stream self-closed by {this_side!r}-side before EoC from {peer_side!r}\n'
+                f'Stream self-closed by {self._ctx.side!r}-side before EoC\n'
                 # } bc a stream is a "scope"/msging-phase inside an IPC
                 f'x}}>\n'
-                f'  |_{self}\n'
+                f'|_{self}\n'
             )
             log.cancel(message)
             self._eoc = trio.EndOfChannel(message)
 
-            if (
-                (rx_chan := self._rx_chan)
-                and
-                (stats := rx_chan.statistics()).tasks_waiting_receive
-            ):
-                log.cancel(
-                    f'Msg-stream is closing but there is still reader tasks,\n'
-                    f'{stats}\n'
-                )
-
         # ?XXX WAIT, why do we not close the local mem chan `._rx_chan` XXX?
         # => NO, DEFINITELY NOT! <=
-        # if we're a bi-dir `MsgStream` BECAUSE this same
+        # if we're a bi-dir ``MsgStream`` BECAUSE this same
         # core-msg-loop mem recv-chan is used to deliver the
         # potential final result from the surrounding inter-actor
         # `Context` so we don't want to close it until that

tractor/_supervise.py

@@ -158,7 +158,6 @@ class ActorNursery:
         # configure and pass runtime state
         _rtv = _state._runtime_vars.copy()
         _rtv['_is_root'] = False
-        _rtv['_is_infected_aio'] = infect_asyncio
 
         # allow setting debug policy per actor
         if debug_mode is not None:
@@ -395,23 +394,17 @@ async def _open_and_supervise_one_cancels_all_nursery(
     # `ActorNursery.start_actor()`).
 
     # errors from this daemon actor nursery bubble up to caller
-    async with trio.open_nursery(
+    async with trio.open_nursery() as da_nursery:
-        strict_exception_groups=False,
-        # ^XXX^ TODO? instead unpack any RAE as per "loose" style?
-    ) as da_nursery:
         try:
             # This is the inner level "run in actor" nursery. It is
             # awaited first since actors spawned in this way (using
-            # `ActorNusery.run_in_actor()`) are expected to only
+            # ``ActorNusery.run_in_actor()``) are expected to only
             # return a single result and then complete (i.e. be canclled
             # gracefully). Errors collected from these actors are
             # immediately raised for handling by a supervisor strategy.
             # As such if the strategy propagates any error(s) upwards
             # the above "daemon actor" nursery will be notified.
-            async with trio.open_nursery(
+            async with trio.open_nursery() as ria_nursery:
-                strict_exception_groups=False,
-                # ^XXX^ TODO? instead unpack any RAE as per "loose" style?
-            ) as ria_nursery:
 
                 an = ActorNursery(
                     actor,
@@ -478,8 +471,8 @@ async def _open_and_supervise_one_cancels_all_nursery(
                             ContextCancelled,
                         }:
                             log.cancel(
-                                'Actor-nursery caught remote cancellation\n'
+                                'Actor-nursery caught remote cancellation\n\n'
-                                '\n'
+
                                 f'{inner_err.tb_str}'
                             )
                         else:
@@ -571,9 +564,7 @@ async def _open_and_supervise_one_cancels_all_nursery(
 @acm
 # @api_frame
 async def open_nursery(
-    hide_tb: bool = True,
     **kwargs,
-    # ^TODO, paramspec for `open_root_actor()`
 
 ) -> typing.AsyncGenerator[ActorNursery, None]:
     '''
@@ -591,7 +582,7 @@ async def open_nursery(
     which cancellation scopes correspond to each spawned subactor set.
 
     '''
-    __tracebackhide__: bool = hide_tb
+    __tracebackhide__: bool = True
     implicit_runtime: bool = False
     actor: Actor = current_actor(err_on_no_runtime=False)
     an: ActorNursery|None = None
@@ -607,10 +598,7 @@ async def open_nursery(
             # mark us for teardown on exit
             implicit_runtime: bool = True
 
-            async with open_root_actor(
+            async with open_root_actor(**kwargs) as actor:
-                hide_tb=hide_tb,
-                **kwargs,
-            ) as actor:
                 assert actor is current_actor()
 
                 try:
@@ -648,10 +636,8 @@ async def open_nursery(
         # show frame on any internal runtime-scope error
         if (
             an
-            and
+            and not an.cancelled
-            not an.cancelled
+            and an._scope_error
-            and
-            an._scope_error
         ):
             __tracebackhide__: bool = False
 

tractor/_testing/__init__.py

@@ -19,16 +19,10 @@ Various helpers/utils for auditing your `tractor` app and/or the
 core runtime.
 
 '''
-from contextlib import (
+from contextlib import asynccontextmanager as acm
-    asynccontextmanager as acm,
-)
-import os
 import pathlib
 
 import tractor
-from tractor.devx._debug import (
-    BoxedMaybeException,
-)
 from .pytest import (
     tractor_test as tractor_test
 )
@@ -60,35 +54,6 @@ def examples_dir() -> pathlib.Path:
     return repodir() / 'examples'
 
 
-def mk_cmd(
-    ex_name: str,
-    exs_subpath: str = 'debugging',
-) -> str:
-    '''
-    Generate a shell command suitable to pass to `pexpect.spawn()`
-    which runs the script as a python program's entrypoint.
-
-    In particular ensure we disable the new tb coloring via unsetting
-    `$PYTHON_COLORS` so that `pexpect` can pattern match without
-    color-escape-codes.
-
-    '''
-    script_path: pathlib.Path = (
-        examples_dir()
-        / exs_subpath
-        / f'{ex_name}.py'
-    )
-    py_cmd: str = ' '.join([
-        'python',
-        str(script_path)
-    ])
-    # XXX, required for py 3.13+
-    # https://docs.python.org/3/using/cmdline.html#using-on-controlling-color
-    # https://docs.python.org/3/using/cmdline.html#envvar-PYTHON_COLORS
-    os.environ['PYTHON_COLORS'] = '0'
-    return py_cmd
-
-
 @acm
 async def expect_ctxc(
     yay: bool,
@@ -101,13 +66,12 @@ async def expect_ctxc(
     '''
     if yay:
         try:
-            yield (maybe_exc := BoxedMaybeException())
+            yield
             raise RuntimeError('Never raised ctxc?')
-        except tractor.ContextCancelled as ctxc:
+        except tractor.ContextCancelled:
-            maybe_exc.value = ctxc
             if reraise:
                 raise
             else:
                 return
     else:
-        yield (maybe_exc := BoxedMaybeException())
+        yield

tractor/devx/__init__.py

@@ -26,7 +26,7 @@ from ._debug import (
     breakpoint as breakpoint,
     pause as pause,
     pause_from_sync as pause_from_sync,
-    sigint_shield as sigint_shield,
+    shield_sigint_handler as shield_sigint_handler,
     open_crash_handler as open_crash_handler,
     maybe_open_crash_handler as maybe_open_crash_handler,
     maybe_init_greenback as maybe_init_greenback,

tractor/devx/_frame_stack.py

@@ -234,7 +234,7 @@ def find_caller_info(
 _frame2callerinfo_cache: dict[FrameType, CallerInfo] = {}
 
 
-# TODO: -[x] move all this into new `.devx._frame_stack`!
+# TODO: -[x] move all this into new `.devx._code`!
 # -[ ] consider rename to _callstack?
 # -[ ] prolly create a `@runtime_api` dec?
 #   |_ @api_frame seems better?
@@ -286,18 +286,3 @@ def api_frame(
     wrapped._call_infos: dict[FrameType, CallerInfo] = _frame2callerinfo_cache
     wrapped.__api_func__: bool = True
     return wrapper(wrapped)
-
-
-# TODO: something like this instead of the adhoc frame-unhiding
-# blocks all over the runtime!! XD
-# -[ ] ideally we can expect a certain error (set) and if something
-#     else is raised then all frames below the wrapped one will be
-#     un-hidden via `__tracebackhide__: bool = False`.
-# |_ might need to dynamically mutate the code objs like
-#    `pdbp.hideframe()` does?
-# -[ ] use this as a `@acm` decorator as introed in 3.10?
-# @acm
-# async def unhide_frame_when_not(
-#     error_set: set[BaseException],
-# ) -> TracebackType:
-#     ...

tractor/devx/_stackscope.py

@@ -24,32 +24,19 @@ disjoint, parallel executing tasks in separate actors.
 
 '''
 from __future__ import annotations
-# from functools import partial
-from threading import (
-    current_thread,
-    Thread,
-    RLock,
-)
 import multiprocessing as mp
 from signal import (
     signal,
-    getsignal,
     SIGUSR1,
-    SIGINT,
-)
-# import traceback
-from types import ModuleType
-from typing import (
-    Callable,
-    TYPE_CHECKING,
 )
+import traceback
+from typing import TYPE_CHECKING
 
 import trio
 from tractor import (
     _state,
     log as logmod,
 )
-from tractor.devx import _debug
 
 log = logmod.get_logger(__name__)
 
@@ -64,68 +51,26 @@ if TYPE_CHECKING:
 
 @trio.lowlevel.disable_ki_protection
 def dump_task_tree() -> None:
-    '''
-    Do a classic `stackscope.extract()` task-tree dump to console at
-    `.devx()` level.
-
-    '''
     import stackscope
+    from tractor.log import get_console_log
+
     tree_str: str = str(
         stackscope.extract(
             trio.lowlevel.current_root_task(),
             recurse_child_tasks=True
         )
     )
+    log = get_console_log(
+        name=__name__,
+        level='cancel',
+    )
     actor: Actor = _state.current_actor()
-    thr: Thread = current_thread()
-    current_sigint_handler: Callable = getsignal(SIGINT)
-    if (
-        current_sigint_handler
-        is not
-        _debug.DebugStatus._trio_handler
-    ):
-        sigint_handler_report: str = (
-            'The default `trio` SIGINT handler was replaced?!'
-        )
-    else:
-        sigint_handler_report: str = (
-            'The default `trio` SIGINT handler is in use?!'
-        )
-
-    # sclang symbology
-    # |_<object>
-    # |_(Task/Thread/Process/Actor
-    # |_{Supervisor/Scope
-    # |_[Storage/Memory/IPC-Stream/Data-Struct
-
     log.devx(
         f'Dumping `stackscope` tree for actor\n'
-        f'(>: {actor.uid!r}\n'
+        f'{actor.name}: {actor}\n'
-        f' |_{mp.current_process()}\n'
+        f' |_{mp.current_process()}\n\n'
-        f'   |_{thr}\n'
+        f'{tree_str}\n'
-        f'     |_{actor}\n'
-        f'\n'
-        f'{sigint_handler_report}\n'
-        f'signal.getsignal(SIGINT) -> {current_sigint_handler!r}\n'
-        # f'\n'
-        # start-of-trace-tree delimiter (mostly for testing)
-        # f'------ {actor.uid!r} ------\n'
-        f'\n'
-        f'------ start-of-{actor.uid!r} ------\n'
-        f'|\n'
-        f'{tree_str}'
-        # end-of-trace-tree delimiter (mostly for testing)
-        f'|\n'
-        f'|_____ end-of-{actor.uid!r} ______\n'
     )
-    # TODO: can remove this right?
-    # -[ ] was original code from author
-    #
-    # print(
-    #     'DUMPING FROM PRINT\n'
-    #     +
-    #     content
-    # )
     # import logging
     # try:
     #     with open("/dev/tty", "w") as tty:
@@ -135,130 +80,58 @@ def dump_task_tree() -> None:
     #         "task_tree"
     #     ).exception("Error printing task tree")
 
-_handler_lock = RLock()
-_tree_dumped: bool = False
 
-
+def signal_handler(
-def dump_tree_on_sig(
     sig: int,
     frame: object,
 
     relay_to_subs: bool = True,
 
 ) -> None:
-    global _tree_dumped, _handler_lock
+    try:
-    with _handler_lock:
+        trio.lowlevel.current_trio_token(
-        # if _tree_dumped:
+        ).run_sync_soon(dump_task_tree)
-        #     log.warning(
+    except RuntimeError:
-        #         'Already dumped for this actor...??'
+        # not in async context -- print a normal traceback
-        #     )
+        traceback.print_stack()
-        #     return
-
-        _tree_dumped = True
-
-        # actor: Actor = _state.current_actor()
-        log.devx(
-            'Trying to dump `stackscope` tree..\n'
-        )
-        try:
-            dump_task_tree()
-            # await actor._service_n.start_soon(
-            #     partial(
-            #         trio.to_thread.run_sync,
-            #         dump_task_tree,
-            #     )
-            # )
-            # trio.lowlevel.current_trio_token().run_sync_soon(
-            #     dump_task_tree
-            # )
-
-        except RuntimeError:
-            log.exception(
-                'Failed to dump `stackscope` tree..\n'
-            )
-            # not in async context -- print a normal traceback
-            # traceback.print_stack()
-            raise
-
-        except BaseException:
-            log.exception(
-                'Failed to dump `stackscope` tree..\n'
-            )
-            raise
-
-        # log.devx(
-        #     'Supposedly we dumped just fine..?'
-        # )
 
     if not relay_to_subs:
         return
 
     an: ActorNursery
     for an in _state.current_actor()._actoruid2nursery.values():
+
         subproc: ProcessType
         subactor: Actor
         for subactor, subproc, _ in an._children.values():
-            log.warning(
+            log.devx(
                 f'Relaying `SIGUSR1`[{sig}] to sub-actor\n'
                 f'{subactor}\n'
                 f' |_{subproc}\n'
             )
 
-            # bc of course stdlib can't have a std API.. XD
+            if isinstance(subproc, trio.Process):
-            match subproc:
+                subproc.send_signal(sig)
-                case trio.Process():
-                    subproc.send_signal(sig)
 
-                case mp.Process():
+            elif isinstance(subproc, mp.Process):
-                    subproc._send_signal(sig)
+                subproc._send_signal(sig)
 
 
 def enable_stack_on_sig(
-    sig: int = SIGUSR1,
+    sig: int = SIGUSR1
-) -> ModuleType:
+) -> None:
     '''
     Enable `stackscope` tracing on reception of a signal; by
     default this is SIGUSR1.
 
-    HOT TIP: a task/ctx-tree dump can be triggered from a shell with
-    fancy cmds.
-
-    For ex. from `bash` using `pgrep` and cmd-sustitution
-    (https://www.gnu.org/software/bash/manual/bash.html#Command-Substitution)
-    you could use:
-
-    >> kill -SIGUSR1 $(pgrep -f <part-of-cmd: str>)
-
-    OR without a sub-shell,
-
-    >> pkill --signal SIGUSR1 -f <part-of-cmd: str>
-
     '''
-    try:
-        import stackscope
-    except ImportError:
-        log.warning(
-            '`stackscope` not installed for use in debug mode!'
-        )
-        return None
-
-    handler: Callable|int = getsignal(sig)
-    if handler is dump_tree_on_sig:
-        log.devx(
-            'A `SIGUSR1` handler already exists?\n'
-            f'|_ {handler!r}\n'
-        )
-        return
-
     signal(
         sig,
-        dump_tree_on_sig,
+        signal_handler,
     )
-    log.devx(
+    # NOTE: not the above can be triggered from
-        'Enabling trace-trees on `SIGUSR1` '
+    # a (xonsh) shell using:
-        'since `stackscope` is installed @ \n'
+    # kill -SIGUSR1 @$(pgrep -f '<cmd>')
-        f'{stackscope!r}\n\n'
+    #
-        f'With `SIGUSR1` handler\n'
+    # for example if you were looking to trace a `pytest` run
-        f'|_{dump_tree_on_sig}\n'
+    # kill -SIGUSR1 @$(pgrep -f 'pytest')
-    )
-    return stackscope

tractor/devx/pformat.py

@@ -53,7 +53,6 @@ def pformat_boxed_tb(
 
     tb_box_indent: int|None = None,
     tb_body_indent: int = 1,
-    boxer_header: str = '-'
 
 ) -> str:
     '''
@@ -89,10 +88,10 @@ def pformat_boxed_tb(
 
     tb_box: str = (
         f'|\n'
-        f' ------ {boxer_header} ------\n'
+        f' ------ - ------\n'
         f'{tb_body}'
-        f' ------ {boxer_header}- ------\n'
+        f' ------ - ------\n'
-        f'_|'
+        f'_|\n'
     )
     tb_box_indent: str = (
         tb_box_indent

tractor/log.py

@@ -258,28 +258,20 @@ class ActorContextInfo(Mapping):
 
 
 def get_logger(
-    name: str|None = None,
+
+    name: str | None = None,
     _root_name: str = _proj_name,
 
-    logger: Logger|None = None,
-
-    # TODO, using `.config.dictConfig()` api?
-    # -[ ] SO answer with docs links
-    #  |_https://stackoverflow.com/questions/7507825/where-is-a-complete-example-of-logging-config-dictconfig
-    #  |_https://docs.python.org/3/library/logging.config.html#configuration-dictionary-schema
-    subsys_spec: str|None = None,
-
 ) -> StackLevelAdapter:
     '''Return the package log or a sub-logger for ``name`` if provided.
 
     '''
     log: Logger
-    log = rlog = logger or logging.getLogger(_root_name)
+    log = rlog = logging.getLogger(_root_name)
 
     if (
         name
-        and
+        and name != _proj_name
-        name != _proj_name
     ):
 
         # NOTE: for handling for modules that use ``get_logger(__name__)``
@@ -291,7 +283,7 @@ def get_logger(
         #   since in python the {filename} is always this same
         #   module-file.
 
-        sub_name: None|str = None
+        sub_name: None | str = None
         rname, _, sub_name = name.partition('.')
         pkgpath, _, modfilename = sub_name.rpartition('.')
 
@@ -314,10 +306,7 @@ def get_logger(
 
     # add our actor-task aware adapter which will dynamically look up
     # the actor and task names at each log emit
-    logger = StackLevelAdapter(
+    logger = StackLevelAdapter(log, ActorContextInfo())
-        log,
-        ActorContextInfo(),
-    )
 
     # additional levels
     for name, val in CUSTOM_LEVELS.items():
@@ -330,25 +319,15 @@ def get_logger(
 
 
 def get_console_log(
-    level: str|None = None,
+    level: str | None = None,
-    logger: Logger|None = None,
     **kwargs,
-
 ) -> LoggerAdapter:
-    '''
+    '''Get the package logger and enable a handler which writes to stderr.
-    Get a `tractor`-style logging instance: a `Logger` wrapped in
-    a `StackLevelAdapter` which injects various concurrency-primitive
-    (process, thread, task) fields and enables a `StreamHandler` that
-    writes on stderr using `colorlog` formatting.
-
-    Yeah yeah, i know we can use `logging.config.dictConfig()`. You do it.
 
+    Yeah yeah, i know we can use ``DictConfig``. You do it.
     '''
-    log = get_logger(
+    log = get_logger(**kwargs)  # our root logger
-        logger=logger,
+    logger = log.logger
-        **kwargs
-    )  # set a root logger
-    logger: Logger = log.logger
 
     if not level:
         return log
@@ -367,13 +346,9 @@ def get_console_log(
             None,
         )
     ):
-        fmt = LOG_FORMAT
-        # if logger:
-        #     fmt = None
-
         handler = StreamHandler()
         formatter = colorlog.ColoredFormatter(
-            fmt=fmt,
+            LOG_FORMAT,
             datefmt=DATE_FORMAT,
             log_colors=STD_PALETTE,
             secondary_log_colors=BOLD_PALETTE,
@@ -390,7 +365,7 @@ def get_loglevel() -> str:
 
 
 # global module logger for tractor itself
-log: StackLevelAdapter = get_logger('tractor')
+log = get_logger('tractor')
 
 
 def at_least_level(

tractor/msg/__init__.py

@@ -33,7 +33,6 @@ from ._codec import (
 
     apply_codec as apply_codec,
     mk_codec as mk_codec,
-    mk_dec as mk_dec,
     MsgCodec as MsgCodec,
     MsgDec as MsgDec,
     current_codec as current_codec,

tractor/msg/_codec.py

@@ -41,10 +41,8 @@ import textwrap
 from typing import (
     Any,
     Callable,
-    Protocol,
     Type,
     TYPE_CHECKING,
-    TypeVar,
     Union,
 )
 from types import ModuleType
@@ -61,7 +59,6 @@ from tractor.msg.pretty_struct import Struct
 from tractor.msg.types import (
     mk_msg_spec,
     MsgType,
-    PayloadMsg,
 )
 from tractor.log import get_logger
 
@@ -81,7 +78,6 @@ class MsgDec(Struct):
 
     '''
     _dec: msgpack.Decoder
-    # _ext_types_box: Struct|None = None
 
     @property
     def dec(self) -> msgpack.Decoder:
@@ -181,126 +177,19 @@ class MsgDec(Struct):
 
 
 def mk_dec(
-    spec: Union[Type[Struct]]|Type|None,
+    spec: Union[Type[Struct]]|Any = Any,
-
-    # NOTE, required for ad-hoc type extensions to the underlying
-    # serialization proto (which is default `msgpack`),
-    # https://jcristharif.com/msgspec/extending.html#mapping-to-from-native-types
     dec_hook: Callable|None = None,
-    ext_types: list[Type]|None = None,
 
 ) -> MsgDec:
-    '''
-    Create an IPC msg decoder, a slightly higher level wrapper around
-    a `msgspec.msgpack.Decoder` which provides,
-
-    - easier introspection of the underlying type spec via
-      the `.spec` and `.spec_str` attrs,
-    - `.hook` access to the `Decoder.dec_hook()`,
-    - automatic custom extension-types decode support when
-      `dec_hook()` is provided such that any `PayloadMsg.pld` tagged
-      as a type from from `ext_types` (presuming the `MsgCodec.encode()` also used
-      a `.enc_hook()`) is processed and constructed by a `PldRx` implicitily.
-
-    NOTE, as mentioned a `MsgDec` is normally used for `PayloadMsg.pld: PayloadT` field
-    decoding inside an IPC-ctx-oriented `PldRx`.
-
-    '''
-    if (
-        spec is None
-        and
-        ext_types is None
-    ):
-        raise TypeError(
-            f'MIssing type-`spec` for msg decoder!\n'
-            f'\n'
-            f'`spec=None` is **only** permitted is if custom extension types '
-            f'are provided via `ext_types`, meaning it must be non-`None`.\n'
-            f'\n'
-            f'In this case it is presumed that only the `ext_types`, '
-            f'which much be handled by a paired `dec_hook()`, '
-            f'will be permitted within the payload type-`spec`!\n'
-            f'\n'
-            f'spec = {spec!r}\n'
-            f'dec_hook = {dec_hook!r}\n'
-            f'ext_types = {ext_types!r}\n'
-        )
-
-    if dec_hook:
-        if ext_types is None:
-            raise TypeError(
-                f'If extending the serializable types with a custom decode hook (`dec_hook()`), '
-                f'you must also provide the expected type set that the hook will handle '
-                f'via a `ext_types: Union[Type]|None = None` argument!\n'
-                f'\n'
-                f'dec_hook = {dec_hook!r}\n'
-                f'ext_types = {ext_types!r}\n'
-            )
-
-        # XXX, i *thought* we would require a boxing struct as per docs,
-        # https://jcristharif.com/msgspec/extending.html#mapping-to-from-native-types
-        # |_ see comment,
-        #  > Note that typed deserialization is required for
-        #  > successful roundtripping here, so we pass `MyMessage` to
-        #  > `Decoder`.
-        #
-        # BUT, turns out as long as you spec a union with `Raw` it
-        # will work? kk B)
-        #
-        # maybe_box_struct = mk_boxed_ext_struct(ext_types)
-        spec = Raw | Union[*ext_types]
 
     return MsgDec(
         _dec=msgpack.Decoder(
             type=spec,  # like `MsgType[Any]`
             dec_hook=dec_hook,
-        ),
+        )
     )
 
 
-# TODO? remove since didn't end up needing this?
-def mk_boxed_ext_struct(
-    ext_types: list[Type],
-) -> Struct:
-    # NOTE, originally was to wrap non-msgpack-supported "extension
-    # types" in a field-typed boxing struct, see notes around the
-    # `dec_hook()` branch in `mk_dec()`.
-    ext_types_union = Union[*ext_types]
-    repr_ext_types_union: str = (
-        str(ext_types_union)
-        or
-        "|".join(ext_types)
-    )
-    BoxedExtType = msgspec.defstruct(
-        f'BoxedExts[{repr_ext_types_union}]',
-        fields=[
-            ('boxed', ext_types_union),
-        ],
-    )
-    return BoxedExtType
-
-
-def unpack_spec_types(
-    spec: Union[Type]|Type,
-) -> set[Type]:
-    '''
-    Given an input type-`spec`, either a lone type
-    or a `Union` of types (like `str|int|MyThing`),
-    return a set of individual types.
-
-    When `spec` is not a type-union returns `{spec,}`.
-
-    '''
-    spec_subtypes: set[Union[Type]] = set(
-         getattr(
-             spec,
-             '__args__',
-             {spec,},
-         )
-    )
-    return spec_subtypes
-
-
 def mk_msgspec_table(
     dec: msgpack.Decoder,
     msg: MsgType|None = None,
@@ -338,13 +227,6 @@ def pformat_msgspec(
     join_char: str = '\n',
 
 ) -> str:
-    '''
-    Pretty `str` format the `msgspec.msgpack.Decoder.type` attribute
-    for display in (console) log messages as a nice (maybe multiline)
-    presentation of all supported `Struct`s (subtypes) available for
-    typed decoding.
-
-    '''
     dec: msgpack.Decoder = getattr(codec, 'dec', codec)
     return join_char.join(
         mk_msgspec_table(
@@ -378,8 +260,6 @@ class MsgCodec(Struct):
     _dec: msgpack.Decoder
     _pld_spec: Type[Struct]|Raw|Any
 
-    # _ext_types_box: Struct|None = None
-
     def __repr__(self) -> str:
         speclines: str = textwrap.indent(
             pformat_msgspec(codec=self),
@@ -446,15 +326,12 @@ class MsgCodec(Struct):
 
     def encode(
         self,
-        py_obj: Any|PayloadMsg,
+        py_obj: Any,
 
         use_buf: bool = False,
         # ^-XXX-^ uhh why am i getting this?
         # |_BufferError: Existing exports of data: object cannot be re-sized
 
-        as_ext_type: bool = False,
-        hide_tb: bool = True,
-
     ) -> bytes:
         '''
         Encode input python objects to `msgpack` bytes for
@@ -464,46 +341,11 @@ class MsgCodec(Struct):
         https://jcristharif.com/msgspec/perf-tips.html#reusing-an-output-buffer
 
         '''
-        __tracebackhide__: bool = hide_tb
         if use_buf:
             self._enc.encode_into(py_obj, self._buf)
             return self._buf
-
+        else:
-        return self._enc.encode(py_obj)
+            return self._enc.encode(py_obj)
-        # try:
-        #     return self._enc.encode(py_obj)
-        # except TypeError as typerr:
-        #     typerr.add_note(
-        #         '|_src error from `msgspec`'
-        #         # f'|_{self._enc.encode!r}'
-        #     )
-        #     raise typerr
-
-        # TODO! REMOVE once i'm confident we won't ever need it!
-        #
-        # box: Struct = self._ext_types_box
-        # if (
-        #     as_ext_type
-        #     or
-        #     (
-        #         # XXX NOTE, auto-detect if the input type
-        #         box
-        #         and
-        #         (ext_types := unpack_spec_types(
-        #             spec=box.__annotations__['boxed'])
-        #         )
-        #     )
-        # ):
-        #     match py_obj:
-        #         # case PayloadMsg(pld=pld) if (
-        #         #     type(pld) in ext_types
-        #         # ):
-        #         #     py_obj.pld = box(boxed=py_obj)
-        #         #     breakpoint()
-        #         case _ if (
-        #             type(py_obj) in ext_types
-        #         ):
-        #             py_obj = box(boxed=py_obj)
 
     @property
     def dec(self) -> msgpack.Decoder:
@@ -523,30 +365,21 @@ class MsgCodec(Struct):
         return self._dec.decode(msg)
 
 
-# ?TODO? time to remove this finally?
+# [x] TODO: a sub-decoder system as well? => No!
-#
-# -[x] TODO: a sub-decoder system as well?
-# => No! already re-architected to include a "payload-receiver"
-#   now found in `._ops`.
 #
 # -[x] do we still want to try and support the sub-decoder with
 # `.Raw` technique in the case that the `Generic` approach gives
 # future grief?
-# => well YES but NO, since we went with the `PldRx` approach
+# => NO, since we went with the `PldRx` approach instead B)
-#   instead!
 #
 # IF however you want to see the code that was staged for this
 # from wayyy back, see the pure removal commit.
 
 
 def mk_codec(
-    ipc_pld_spec: Union[Type[Struct]]|Any|Raw = Raw,
+    # struct type unions set for `Decoder`
-    # tagged-struct-types-union set for `Decoder`ing of payloads, as
+    # https://jcristharif.com/msgspec/structs.html#tagged-unions
-    # per https://jcristharif.com/msgspec/structs.html#tagged-unions.
+    ipc_pld_spec: Union[Type[Struct]]|Any = Any,
-    # NOTE that the default `Raw` here **is very intentional** since
-    # the `PldRx._pld_dec: MsgDec` is responsible for per ipc-ctx-task
-    # decoding of msg-specs defined by the user as part of **their**
-    # `tractor` "app's" type-limited IPC msg-spec.
 
     # TODO: offering a per-msg(-field) type-spec such that
     # the fields can be dynamically NOT decoded and left as `Raw`
@@ -559,18 +392,13 @@ def mk_codec(
 
     libname: str = 'msgspec',
 
-    # settings for encoding-to-send extension-types,
+    # proxy as `Struct(**kwargs)` for ad-hoc type extensions
     # https://jcristharif.com/msgspec/extending.html#mapping-to-from-native-types
-    # dec_hook: Callable|None = None,
+    # ------ - ------
+    dec_hook: Callable|None = None,
     enc_hook: Callable|None = None,
-    ext_types: list[Type]|None = None,
+    # ------ - ------
-
-    # optionally provided msg-decoder from which we pull its,
-    # |_.dec_hook()
-    # |_.type
-    ext_dec: MsgDec|None = None
     #
-    # ?TODO? other params we might want to support
     # Encoder:
     # write_buffer_size=write_buffer_size,
     #
@@ -584,44 +412,26 @@ def mk_codec(
     `msgspec` ;).
 
     '''
-    pld_spec = ipc_pld_spec
+    # (manually) generate a msg-payload-spec for all relevant
-    if enc_hook:
+    # god-boxing-msg subtypes, parameterizing the `PayloadMsg.pld: PayloadT`
-        if not ext_types:
+    # for the decoder such that all sub-type msgs in our SCIPP
-            raise TypeError(
+    # will automatically decode to a type-"limited" payload (`Struct`)
-                f'If extending the serializable types with a custom encode hook (`enc_hook()`), '
+    # object (set).
-                f'you must also provide the expected type set that the hook will handle '
-                f'via a `ext_types: Union[Type]|None = None` argument!\n'
-                f'\n'
-                f'enc_hook = {enc_hook!r}\n'
-                f'ext_types = {ext_types!r}\n'
-            )
-
-    dec_hook: Callable|None = None
-    if ext_dec:
-        dec: msgspec.Decoder = ext_dec.dec
-        dec_hook = dec.dec_hook
-        pld_spec |= dec.type
-        if ext_types:
-            pld_spec |= Union[*ext_types]
-
-    # (manually) generate a msg-spec (how appropes) for all relevant
-    # payload-boxing-struct-msg-types, parameterizing the
-    # `PayloadMsg.pld: PayloadT` for the decoder such that all msgs
-    # in our SC-RPC-protocol will automatically decode to
-    # a type-"limited" payload (`Struct`) object (set).
     (
         ipc_msg_spec,
         msg_types,
     ) = mk_msg_spec(
-        payload_type_union=pld_spec,
+        payload_type_union=ipc_pld_spec,
     )
+    assert len(ipc_msg_spec.__args__) == len(msg_types)
+    assert ipc_msg_spec
 
-    msg_spec_types: set[Type] = unpack_spec_types(ipc_msg_spec)
+    # TODO: use this shim instead?
-    assert (
+    # bc.. unification, err somethin?
-        len(ipc_msg_spec.__args__) == len(msg_types)
+    # dec: MsgDec = mk_dec(
-        and
+    #     spec=ipc_msg_spec,
-        len(msg_spec_types) == len(msg_types)
+    #     dec_hook=dec_hook,
-    )
+    # )
 
     dec = msgpack.Decoder(
         type=ipc_msg_spec,
@@ -630,29 +440,22 @@ def mk_codec(
     enc = msgpack.Encoder(
        enc_hook=enc_hook,
     )
+
     codec = MsgCodec(
         _enc=enc,
         _dec=dec,
-        _pld_spec=pld_spec,
+        _pld_spec=ipc_pld_spec,
     )
+
     # sanity on expected backend support
     assert codec.lib.__name__ == libname
+
     return codec
 
 
 # instance of the default `msgspec.msgpack` codec settings, i.e.
 # no custom structs, hooks or other special types.
-#
+_def_msgspec_codec: MsgCodec = mk_codec(ipc_pld_spec=Any)
-# XXX NOTE XXX, this will break our `Context.start()` call!
-#
-# * by default we roundtrip the started pld-`value` and if you apply
-#   this codec (globally anyway with `apply_codec()`) then the
-#   `roundtripped` value will include a non-`.pld: Raw` which will
-#   then type-error on the consequent `._ops.validte_payload_msg()`..
-#
-_def_msgspec_codec: MsgCodec = mk_codec(
-    ipc_pld_spec=Any,
-)
 
 # The built-in IPC `Msg` spec.
 # Our composing "shuttle" protocol which allows `tractor`-app code
@@ -660,13 +463,13 @@ _def_msgspec_codec: MsgCodec = mk_codec(
 # https://jcristharif.com/msgspec/supported-types.html
 #
 _def_tractor_codec: MsgCodec = mk_codec(
-    ipc_pld_spec=Raw,  # XXX should be default righ!?
+    # TODO: use this for debug mode locking prot?
+    # ipc_pld_spec=Any,
+    ipc_pld_spec=Raw,
 )
-
+# TODO: IDEALLY provides for per-`trio.Task` specificity of the
-# -[x] TODO, IDEALLY provides for per-`trio.Task` specificity of the
 # IPC msging codec used by the transport layer when doing
 # `Channel.send()/.recv()` of wire data.
-# => impled as our `PldRx` which is `Context` scoped B)
 
 # ContextVar-TODO: DIDN'T WORK, kept resetting in every new task to default!?
 # _ctxvar_MsgCodec: ContextVar[MsgCodec] = ContextVar(
@@ -743,6 +546,17 @@ def apply_codec(
     )
     token: Token = var.set(codec)
 
+    # ?TODO? for TreeVar approach which copies from the
+    # cancel-scope of the prior value, NOT the prior task
+    # See the docs:
+    # - https://tricycle.readthedocs.io/en/latest/reference.html#tree-variables
+    # - https://github.com/oremanj/tricycle/blob/master/tricycle/_tests/test_tree_var.py
+    #   ^- see docs for @cm `.being()` API
+    # with _ctxvar_MsgCodec.being(codec):
+    #     new = _ctxvar_MsgCodec.get()
+    #     assert new is codec
+    #     yield codec
+
     try:
         yield var.get()
     finally:
@@ -753,19 +567,6 @@ def apply_codec(
         )
         assert var.get() is orig
 
-    # ?TODO? for TreeVar approach which copies from the
-    # cancel-scope of the prior value, NOT the prior task
-    #
-    # See the docs:
-    # - https://tricycle.readthedocs.io/en/latest/reference.html#tree-variables
-    # - https://github.com/oremanj/tricycle/blob/master/tricycle/_tests/test_tree_var.py
-    #   ^- see docs for @cm `.being()` API
-    #
-    # with _ctxvar_MsgCodec.being(codec):
-    #     new = _ctxvar_MsgCodec.get()
-    #     assert new is codec
-    #     yield codec
-
 
 def current_codec() -> MsgCodec:
     '''
@@ -785,7 +586,6 @@ def limit_msg_spec(
     # -> related to the `MsgCodec._payload_decs` stuff above..
     # tagged_structs: list[Struct]|None = None,
 
-    hide_tb: bool = True,
     **codec_kwargs,
 
 ) -> MsgCodec:
@@ -796,7 +596,7 @@ def limit_msg_spec(
     for all IPC contexts in use by the current `trio.Task`.
 
     '''
-    __tracebackhide__: bool = hide_tb
+    __tracebackhide__: bool = True
     curr_codec: MsgCodec = current_codec()
     msgspec_codec: MsgCodec = mk_codec(
         ipc_pld_spec=payload_spec,
@@ -830,57 +630,31 @@ def limit_msg_spec(
 #         # import pdbp; pdbp.set_trace()
 #         assert ext_codec.pld_spec == extended_spec
 #         yield ext_codec
+
+
+# TODO: make something similar to this inside `._codec` such that
+# user can just pass a type table of some sort?
+# -[ ] we would need to decode all msgs to `pretty_struct.Struct`
+#     and then call `.to_dict()` on them?
+# -[x] we're going to need to re-impl all the stuff changed in the
+#    runtime port such that it can handle dicts or `Msg`s?
 #
-# ^-TODO-^ is it impossible to make something like this orr!?
+# def mk_dict_msg_codec_hooks() -> tuple[Callable, Callable]:
-
+#     '''
-# TODO: make an auto-custom hook generator from a set of input custom
+#     Deliver a `enc_hook()`/`dec_hook()` pair which does
-# types?
+#     manual convertion from our above native `Msg` set
-# -[ ] below is a proto design using a `TypeCodec` idea?
+#     to `dict` equivalent (wire msgs) in order to keep legacy compat
+#     with the original runtime implementation.
 #
-# type var for the expected interchange-lib's
+#     Note: this is is/was primarly used while moving the core
-# IPC-transport type when not available as a built-in
+#     runtime over to using native `Msg`-struct types wherein we
-# serialization output.
+#     start with the send side emitting without loading
-WireT = TypeVar('WireT')
+#     a typed-decoder and then later flipping the switch over to
-
+#     load to the native struct types once all runtime usage has
-
+#     been adjusted appropriately.
-# TODO: some kinda (decorator) API for built-in subtypes
+#
-# that builds this implicitly by inspecting the `mro()`?
+#     '''
-class TypeCodec(Protocol):
+#     return (
-    '''
+#         # enc_to_dict,
-    A per-custom-type wire-transport serialization translator
+#         dec_from_dict,
-    description type.
+#     )
-
-    '''
-    src_type: Type
-    wire_type: WireT
-
-    def encode(obj: Type) -> WireT:
-        ...
-
-    def decode(
-        obj_type: Type[WireT],
-        obj: WireT,
-    ) -> Type:
-        ...
-
-
-class MsgpackTypeCodec(TypeCodec):
-    ...
-
-
-def mk_codec_hooks(
-    type_codecs: list[TypeCodec],
-
-) -> tuple[Callable, Callable]:
-    '''
-    Deliver a `enc_hook()`/`dec_hook()` pair which handle
-    manual convertion from an input `Type` set such that whenever
-    the `TypeCodec.filter()` predicate matches the
-    `TypeCodec.decode()` is called on the input native object by
-    the `dec_hook()` and whenever the
-    `isiinstance(obj, TypeCodec.type)` matches against an
-    `enc_hook(obj=obj)` the return value is taken from a
-    `TypeCodec.encode(obj)` callback.
-
-    '''
-    ...

tractor/msg/_exts.py

@@ -1,94 +0,0 @@
-# tractor: structured concurrent "actors".
-# Copyright 2018-eternity Tyler Goodlet.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-'''
-Type-extension-utils for codec-ing (python) objects not
-covered by the `msgspec.msgpack` protocol.
-
-See the various API docs from `msgspec`.
-
-extending from native types,
-- https://jcristharif.com/msgspec/extending.html#mapping-to-from-native-types
-
-converters,
-- https://jcristharif.com/msgspec/converters.html
-- https://jcristharif.com/msgspec/api.html#msgspec.convert
-
-`Raw` fields,
-- https://jcristharif.com/msgspec/api.html#raw
-- support for `.convert()` and `Raw`,
-  |_ https://jcristharif.com/msgspec/changelog.html
-
-'''
-from types import (
-    ModuleType,
-)
-import typing
-from typing import (
-    Type,
-    Union,
-)
-
-def dec_type_union(
-    type_names: list[str],
-    mods: list[ModuleType] = []
-) -> Type|Union[Type]:
-    '''
-    Look up types by name, compile into a list and then create and
-    return a `typing.Union` from the full set.
-
-    '''
-    # import importlib
-    types: list[Type] = []
-    for type_name in type_names:
-        for mod in [
-            typing,
-            # importlib.import_module(__name__),
-        ] + mods:
-            if type_ref := getattr(
-                mod,
-                type_name,
-                False,
-            ):
-                types.append(type_ref)
-
-    # special case handling only..
-    # ipc_pld_spec: Union[Type] = eval(
-    #     pld_spec_str,
-    #     {},  # globals
-    #     {'typing': typing},  # locals
-    # )
-
-    return Union[*types]
-
-
-def enc_type_union(
-    union_or_type: Union[Type]|Type,
-) -> list[str]:
-    '''
-    Encode a type-union or single type to a list of type-name-strings
-    ready for IPC interchange.
-
-    '''
-    type_strs: list[str] = []
-    for typ in getattr(
-        union_or_type,
-        '__args__',
-        {union_or_type,},
-    ):
-        type_strs.append(typ.__qualname__)
-
-    return type_strs

tractor/msg/_ops.py

@@ -50,9 +50,7 @@ from tractor._exceptions import (
     _mk_recv_mte,
     pack_error,
 )
-from tractor._state import (
+from tractor._state import current_ipc_ctx
-    current_ipc_ctx,
-)
 from ._codec import (
     mk_dec,
     MsgDec,
@@ -80,7 +78,7 @@ if TYPE_CHECKING:
 log = get_logger(__name__)
 
 
-_def_any_pldec: MsgDec[Any] = mk_dec(spec=Any)
+_def_any_pldec: MsgDec[Any] = mk_dec()
 
 
 class PldRx(Struct):
@@ -110,11 +108,33 @@ class PldRx(Struct):
     # TODO: better to bind it here?
     # _rx_mc: trio.MemoryReceiveChannel
     _pld_dec: MsgDec
+    _ctx: Context|None = None
+    _ipc: Context|MsgStream|None = None
 
     @property
     def pld_dec(self) -> MsgDec:
         return self._pld_dec
 
+    # TODO: a better name?
+    # -[ ] when would this be used as it avoids needingn to pass the
+    #   ipc prim to every method
+    @cm
+    def wraps_ipc(
+        self,
+        ipc_prim: Context|MsgStream,
+
+    ) -> PldRx:
+        '''
+        Apply this payload receiver to an IPC primitive type, one
+        of `Context` or `MsgStream`.
+
+        '''
+        self._ipc = ipc_prim
+        try:
+            yield self
+        finally:
+            self._ipc = None
+
     @cm
     def limit_plds(
         self,
@@ -128,10 +148,6 @@ class PldRx(Struct):
         exit.
 
         '''
-        # TODO, ensure we pull the current `MsgCodec`'s custom
-        # dec/enc_hook settings as well ?
-        # -[ ] see `._codec.mk_codec()` inputs
-        #
         orig_dec: MsgDec = self._pld_dec
         limit_dec: MsgDec = mk_dec(
             spec=spec,
@@ -147,7 +163,7 @@ class PldRx(Struct):
     def dec(self) -> msgpack.Decoder:
         return self._pld_dec.dec
 
-    def recv_msg_nowait(
+    def recv_pld_nowait(
         self,
         # TODO: make this `MsgStream` compat as well, see above^
         # ipc_prim: Context|MsgStream,
@@ -158,95 +174,34 @@ class PldRx(Struct):
         hide_tb: bool = False,
         **dec_pld_kwargs,
 
-    ) -> tuple[
+    ) -> Any|Raw:
-        MsgType[PayloadT],
-        PayloadT,
-    ]:
-        '''
-        Attempt to non-blocking receive a message from the `._rx_chan` and
-        unwrap it's payload delivering the pair to the caller.
-
-        '''
         __tracebackhide__: bool = hide_tb
 
         msg: MsgType = (
             ipc_msg
             or
+
             # sync-rx msg from underlying IPC feeder (mem-)chan
             ipc._rx_chan.receive_nowait()
         )
-        pld: PayloadT = self.decode_pld(
+        return self.decode_pld(
             msg,
             ipc=ipc,
             expect_msg=expect_msg,
             hide_tb=hide_tb,
             **dec_pld_kwargs,
         )
-        return (
-            msg,
-            pld,
-        )
-
-    async def recv_msg(
-        self,
-        ipc: Context|MsgStream,
-        expect_msg: MsgType,
-
-        # NOTE: ONLY for handling `Stop`-msgs that arrive during
-        # a call to `drain_to_final_msg()` above!
-        passthrough_non_pld_msgs: bool = True,
-        hide_tb: bool = True,
-
-        **decode_pld_kwargs,
-
-    ) -> tuple[MsgType, PayloadT]:
-        '''
-        Retrieve the next avail IPC msg, decode its payload, and
-        return the (msg, pld) pair.
-
-        '''
-        __tracebackhide__: bool = hide_tb
-        msg: MsgType = await ipc._rx_chan.receive()
-        match msg:
-            case Return()|Error():
-                log.runtime(
-                    f'Rxed final outcome msg\n'
-                    f'{msg}\n'
-                )
-            case Stop():
-                log.runtime(
-                    f'Rxed stream stopped msg\n'
-                    f'{msg}\n'
-                )
-                if passthrough_non_pld_msgs:
-                    return msg, None
-
-        # TODO: is there some way we can inject the decoded
-        # payload into an existing output buffer for the original
-        # msg instance?
-        pld: PayloadT = self.decode_pld(
-            msg,
-            ipc=ipc,
-            expect_msg=expect_msg,
-            hide_tb=hide_tb,
-
-            **decode_pld_kwargs,
-        )
-        return (
-            msg,
-            pld,
-        )
 
     async def recv_pld(
         self,
         ipc: Context|MsgStream,
-        ipc_msg: MsgType[PayloadT]|None = None,
+        ipc_msg: MsgType|None = None,
         expect_msg: Type[MsgType]|None = None,
         hide_tb: bool = True,
 
         **dec_pld_kwargs,
 
-    ) -> PayloadT:
+    ) -> Any|Raw:
         '''
         Receive a `MsgType`, then decode and return its `.pld` field.
 
@@ -258,13 +213,6 @@ class PldRx(Struct):
             # async-rx msg from underlying IPC feeder (mem-)chan
             await ipc._rx_chan.receive()
         )
-        if (
-            type(msg) is Return
-        ):
-            log.info(
-                f'Rxed final result msg\n'
-                f'{msg}\n'
-            )
         return self.decode_pld(
             msg=msg,
             ipc=ipc,
@@ -310,9 +258,6 @@ class PldRx(Struct):
                         f'|_pld={pld!r}\n'
                     )
                     return pld
-                except TypeError as typerr:
-                    __tracebackhide__: bool = False
-                    raise typerr
 
                 # XXX pld-value type failure
                 except ValidationError as valerr:
@@ -453,6 +398,45 @@ class PldRx(Struct):
             __tracebackhide__: bool = False
             raise
 
+    dec_msg = decode_pld
+
+    async def recv_msg_w_pld(
+        self,
+        ipc: Context|MsgStream,
+        expect_msg: MsgType,
+
+        # NOTE: generally speaking only for handling `Stop`-msgs that
+        # arrive during a call to `drain_to_final_msg()` above!
+        passthrough_non_pld_msgs: bool = True,
+        hide_tb: bool = True,
+        **kwargs,
+
+    ) -> tuple[MsgType, PayloadT]:
+        '''
+        Retrieve the next avail IPC msg, decode it's payload, and return
+        the pair of refs.
+
+        '''
+        __tracebackhide__: bool = hide_tb
+        msg: MsgType = await ipc._rx_chan.receive()
+
+        if passthrough_non_pld_msgs:
+            match msg:
+                case Stop():
+                    return msg, None
+
+        # TODO: is there some way we can inject the decoded
+        # payload into an existing output buffer for the original
+        # msg instance?
+        pld: PayloadT = self.decode_pld(
+            msg,
+            ipc=ipc,
+            expect_msg=expect_msg,
+            hide_tb=hide_tb,
+            **kwargs,
+        )
+        return msg, pld
+
 
 @cm
 def limit_plds(
@@ -468,16 +452,11 @@ def limit_plds(
 
     '''
     __tracebackhide__: bool = True
-    curr_ctx: Context|None = current_ipc_ctx()
-    if curr_ctx is None:
-        raise RuntimeError(
-            'No IPC `Context` is active !?\n'
-            'Did you open `limit_plds()` from outside '
-            'a `Portal.open_context()` scope-block?'
-        )
     try:
+        curr_ctx: Context = current_ipc_ctx()
         rx: PldRx = curr_ctx._pld_rx
         orig_pldec: MsgDec = rx.pld_dec
+
         with rx.limit_plds(
             spec=spec,
             **dec_kwargs,
@@ -487,11 +466,6 @@ def limit_plds(
                 f'{pldec}\n'
             )
             yield pldec
-
-    except BaseException:
-        __tracebackhide__: bool = False
-        raise
-
     finally:
         log.runtime(
             'Reverted to previous payload-decoder\n\n'
@@ -545,8 +519,8 @@ async def maybe_limit_plds(
 async def drain_to_final_msg(
     ctx: Context,
 
-    msg_limit: int = 6,
     hide_tb: bool = True,
+    msg_limit: int = 6,
 
 ) -> tuple[
     Return|None,
@@ -575,8 +549,8 @@ async def drain_to_final_msg(
     even after ctx closure and the `.open_context()` block exit.
 
     '''
+    __tracebackhide__: bool = hide_tb
     raise_overrun: bool = not ctx._allow_overruns
-    parent_never_opened_stream: bool = ctx._stream is None
 
     # wait for a final context result by collecting (but
     # basically ignoring) any bi-dir-stream msgs still in transit
@@ -585,14 +559,13 @@ async def drain_to_final_msg(
     result_msg: Return|Error|None = None
     while not (
         ctx.maybe_error
-        and
+        and not ctx._final_result_is_set()
-        not ctx._final_result_is_set()
     ):
         try:
             # receive all msgs, scanning for either a final result
             # or error; the underlying call should never raise any
             # remote error directly!
-            msg, pld = await ctx._pld_rx.recv_msg(
+            msg, pld = await ctx._pld_rx.recv_msg_w_pld(
                 ipc=ctx,
                 expect_msg=Return,
                 raise_error=False,
@@ -639,11 +612,6 @@ async def drain_to_final_msg(
                     )
                     __tracebackhide__: bool = False
 
-            else:
-                log.cancel(
-                    f'IPC ctx cancelled externally during result drain ?\n'
-                    f'{ctx}'
-                )
             # CASE 2: mask the local cancelled-error(s)
             # only when we are sure the remote error is
             # the source cause of this local task's
@@ -675,24 +643,17 @@ async def drain_to_final_msg(
             case Yield():
                 pre_result_drained.append(msg)
                 if (
-                    not parent_never_opened_stream
+                    (ctx._stream.closed
-                    and (
+                     and (reason := 'stream was already closed')
-                        (ctx._stream.closed
+                    )
-                         and
+                    or (ctx.cancel_acked
-                         (reason := 'stream was already closed')
+                        and (reason := 'ctx cancelled other side')
-                        ) or
+                    )
-                        (ctx.cancel_acked
+                    or (ctx._cancel_called
-                            and
+                        and (reason := 'ctx called `.cancel()`')
-                            (reason := 'ctx cancelled other side')
+                    )
-                        )
+                    or (len(pre_result_drained) > msg_limit
-                        or (ctx._cancel_called
+                        and (reason := f'"yield" limit={msg_limit}')
-                            and
-                            (reason := 'ctx called `.cancel()`')
-                        )
-                        or (len(pre_result_drained) > msg_limit
-                            and
-                            (reason := f'"yield" limit={msg_limit}')
-                        )
                     )
                 ):
                     log.cancel(
@@ -710,7 +671,7 @@ async def drain_to_final_msg(
                 # drain up to the `msg_limit` hoping to get
                 # a final result or error/ctxc.
                 else:
-                    report: str = (
+                    log.warning(
                         'Ignoring "yield" msg during `ctx.result()` drain..\n'
                         f'<= {ctx.chan.uid}\n'
                         f'  |_{ctx._nsf}()\n\n'
@@ -719,14 +680,6 @@ async def drain_to_final_msg(
 
                         f'{pretty_struct.pformat(msg)}\n'
                     )
-                    if parent_never_opened_stream:
-                        report = (
-                            f'IPC ctx never opened stream on {ctx.side!r}-side!\n'
-                            f'\n'
-                            # f'{ctx}\n'
-                        ) + report
-
-                    log.warning(report)
                     continue
 
             # stream terminated, but no result yet..
@@ -818,7 +771,6 @@ async def drain_to_final_msg(
             f'{ctx.outcome}\n'
         )
 
-    __tracebackhide__: bool = hide_tb
     return (
         result_msg,
         pre_result_drained,
@@ -844,14 +796,8 @@ def validate_payload_msg(
     __tracebackhide__: bool = hide_tb
     codec: MsgCodec = current_codec()
     msg_bytes: bytes = codec.encode(pld_msg)
-    roundtripped: Started|None = None
     try:
         roundtripped: Started = codec.decode(msg_bytes)
-    except TypeError as typerr:
-        __tracebackhide__: bool = False
-        raise typerr
-
-    try:
         ctx: Context = getattr(ipc, 'ctx', ipc)
         pld: PayloadT = ctx.pld_rx.decode_pld(
             msg=roundtripped,
@@ -876,11 +822,6 @@ def validate_payload_msg(
             )
             raise ValidationError(complaint)
 
-    # usually due to `.decode()` input type
-    except TypeError as typerr:
-        __tracebackhide__: bool = False
-        raise typerr
-
     # raise any msg type error NO MATTER WHAT!
     except ValidationError as verr:
         try:
@@ -891,13 +832,9 @@ def validate_payload_msg(
                 verb_header='Trying to send ',
                 is_invalid_payload=True,
             )
-        except BaseException as _be:
+        except BaseException:
-            if not roundtripped:
-                raise verr
-
-            be = _be
             __tracebackhide__: bool = False
-            raise be
+            raise
 
         if not raise_mte:
             return mte

tractor/msg/pretty_struct.py

@@ -30,9 +30,9 @@ from msgspec import (
     Struct as _Struct,
     structs,
 )
-# from pprint import (
+from pprint import (
-#     saferepr,
+    saferepr,
-# )
+)
 
 from tractor.log import get_logger
 
@@ -75,8 +75,8 @@ class DiffDump(UserList):
         for k, left, right in self:
             repstr += (
                 f'({k},\n'
-                f' |_{repr(left)},\n'
+                f'\t{repr(left)},\n'
-                f' |_{repr(right)},\n'
+                f'\t{repr(right)},\n'
                 ')\n'
             )
         repstr += ']\n'
@@ -144,22 +144,15 @@ def pformat(
                 field_indent=indent + field_indent,
             )
 
-        else:
+        else:  # the `pprint` recursion-safe format:
-            val_str: str = repr(v)
-
-            # XXX LOL, below just seems to be f#$%in causing
-            # recursion errs..
-            #
-            # the `pprint` recursion-safe format:
             # https://docs.python.org/3.11/library/pprint.html#pprint.saferepr
-            # try:
+            try:
-            #     val_str: str = saferepr(v)
+                val_str: str = saferepr(v)
-            # except Exception:
+            except Exception:
-            #     log.exception(
+                log.exception(
-            #         'Failed to `saferepr({type(struct)})` !?\n'
+                    'Failed to `saferepr({type(struct)})` !?\n'
-            #     )
+                )
-                # raise
+            return _Struct.__repr__(struct)
-                # return _Struct.__repr__(struct)
 
         # TODO: LOLOL use `textwrap.indent()` instead dawwwwwg!
         obj_str += (field_ws + f'{k}: {typ_name} = {val_str},\n')
@@ -210,7 +203,12 @@ class Struct(
         return sin_props
 
     pformat = pformat
-
+    # __repr__ = pformat
+    # __str__ = __repr__ = pformat
+    # TODO: use a pprint.PrettyPrinter instance around ONLY rendering
+    # inside a known tty?
+    # def __repr__(self) -> str:
+    #     ...
     def __repr__(self) -> str:
         try:
             return pformat(self)
@@ -220,13 +218,6 @@ class Struct(
             )
             return _Struct.__repr__(self)
 
-    # __repr__ = pformat
-    # __str__ = __repr__ = pformat
-    # TODO: use a pprint.PrettyPrinter instance around ONLY rendering
-    # inside a known tty?
-    # def __repr__(self) -> str:
-    #     ...
-
     def copy(
         self,
         update: dict | None = None,
@@ -276,15 +267,13 @@ class Struct(
                 fi.type(getattr(self, fi.name)),
             )
 
-    # TODO: make a mod func instead and just point to it here for
-    # method impl?
     def __sub__(
         self,
         other: Struct,
 
     ) -> DiffDump[tuple[str, Any, Any]]:
         '''
-        Compare fields/items key-wise and return a `DiffDump`
+        Compare fields/items key-wise and return a ``DiffDump``
         for easy visual REPL comparison B)
 
         '''
@@ -301,42 +290,3 @@ class Struct(
                 ))
 
         return diffs
-
-    @classmethod
-    def fields_diff(
-        cls,
-        other: dict|Struct,
-
-    ) -> DiffDump[tuple[str, Any, Any]]:
-        '''
-        Very similar to `PrettyStruct.__sub__()` except accepts an
-        input `other: dict` (presumably that would normally be called
-        like `Struct(**other)`) which returns a `DiffDump` of the
-        fields of the struct and the `dict`'s fields.
-
-        '''
-        nullish = object()
-        consumed: dict = other.copy()
-        diffs: DiffDump[tuple[str, Any, Any]] = DiffDump()
-        for fi in structs.fields(cls):
-            field_name: str = fi.name
-            # ours: Any = getattr(self, field_name)
-            theirs: Any = consumed.pop(field_name, nullish)
-            if theirs is nullish:
-                diffs.append((
-                    field_name,
-                    f'{fi.type!r}',
-                    'NOT-DEFINED in `other: dict`',
-                ))
-
-        # when there are lingering fields in `other` that this struct
-        # DOES NOT define we also append those.
-        if consumed:
-            for k, v in consumed.items():
-                diffs.append((
-                    k,
-                    f'NOT-DEFINED for `{cls.__name__}`',
-                    f'`other: dict` has value = {v!r}',
-                ))
-
-        return diffs

tractor/msg/types.py

@@ -599,15 +599,15 @@ def mk_msg_spec(
         Msg[payload_type_union],
         Generic[PayloadT],
     )
-    # defstruct_bases: tuple = (
+    defstruct_bases: tuple = (
-    #     Msg, # [payload_type_union],
+        Msg, # [payload_type_union],
-    #     # Generic[PayloadT],
+        # Generic[PayloadT],
-    #     # ^-XXX-^: not allowed? lul..
+        # ^-XXX-^: not allowed? lul..
-    # )
+    )
     ipc_msg_types: list[Msg] = []
 
     idx_msg_types: list[Msg] = []
-    # defs_msg_types: list[Msg] = []
+    defs_msg_types: list[Msg] = []
     nc_msg_types: list[Msg] = []
 
     for msgtype in __msg_types__:
@@ -625,7 +625,7 @@ def mk_msg_spec(
         # TODO: wait why do we need the dynamic version here?
         # XXX ANSWER XXX -> BC INHERITANCE.. don't work w generics..
         #
-        # NOTE previously bc msgtypes WERE NOT inheriting
+        # NOTE previously bc msgtypes WERE NOT inheritting
         # directly the `Generic[PayloadT]` type, the manual method
         # of generic-paraming with `.__class_getitem__()` wasn't
         # working..
@@ -662,35 +662,38 @@ def mk_msg_spec(
 
         # with `msgspec.structs.defstruct`
         # XXX ALSO DOESN'T WORK
-        # defstruct_msgtype = defstruct(
+        defstruct_msgtype = defstruct(
-        #     name=msgtype.__name__,
+            name=msgtype.__name__,
-        #     fields=[
+            fields=[
-        #         ('cid', str),
+                ('cid', str),
 
-        #         # XXX doesn't seem to work..
+                # XXX doesn't seem to work..
-        #         # ('pld', PayloadT),
+                # ('pld', PayloadT),
+
+                ('pld', payload_type_union),
+            ],
+            bases=defstruct_bases,
+        )
+        defs_msg_types.append(defstruct_msgtype)
 
-        #         ('pld', payload_type_union),
-        #     ],
-        #     bases=defstruct_bases,
-        # )
-        # defs_msg_types.append(defstruct_msgtype)
         # assert index_paramed_msg_type == manual_paramed_msg_subtype
+
         # paramed_msg_type = manual_paramed_msg_subtype
+
         # ipc_payload_msgs_type_union |= index_paramed_msg_type
 
     idx_spec: Union[Type[Msg]] = Union[*idx_msg_types]
-    # def_spec: Union[Type[Msg]] = Union[*defs_msg_types]
+    def_spec: Union[Type[Msg]] = Union[*defs_msg_types]
     nc_spec: Union[Type[Msg]] = Union[*nc_msg_types]
 
     specs: dict[str, Union[Type[Msg]]] = {
         'indexed_generics': idx_spec,
-        # 'defstruct': def_spec,
+        'defstruct': def_spec,
         'types_new_class': nc_spec,
     }
     msgtypes_table: dict[str, list[Msg]] = {
         'indexed_generics': idx_msg_types,
-        # 'defstruct': defs_msg_types,
+        'defstruct': defs_msg_types,
         'types_new_class': nc_msg_types,
     }
 

tractor/trionics/__init__.py

@@ -29,6 +29,3 @@ from ._broadcast import (
     BroadcastReceiver as BroadcastReceiver,
     Lagged as Lagged,
 )
-from ._beg import (
-    collapse_eg as collapse_eg,
-)

tractor/trionics/_beg.py

@@ -1,58 +0,0 @@
-# tractor: structured concurrent "actors".
-# Copyright 2018-eternity Tyler Goodlet.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-'''
-`BaseExceptionGroup` related utils and helpers pertaining to
-first-class-`trio` from a historical perspective B)
-
-'''
-from contextlib import (
-    asynccontextmanager as acm,
-)
-
-
-def maybe_collapse_eg(
-    beg: BaseExceptionGroup,
-) -> BaseException:
-    '''
-    If the input beg can collapse to a single non-eg sub-exception,
-    return it instead.
-
-    '''
-    if len(excs := beg.exceptions) == 1:
-        return excs[0]
-
-    return beg
-
-
-@acm
-async def collapse_eg():
-    '''
-    If `BaseExceptionGroup` raised in the body scope is
-    "collapse-able" (in the same way that
-    `trio.open_nursery(strict_exception_groups=False)` works) then
-    only raise the lone emedded non-eg in in place.
-
-    '''
-    try:
-        yield
-    except* BaseException as beg:
-        if (
-            exc := maybe_collapse_eg(beg)
-        ) is not beg:
-            raise exc
-
-        raise beg

tractor/trionics/_broadcast.py

@@ -15,7 +15,7 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 '''
-`tokio` style broadcast channel.
+``tokio`` style broadcast channel.
 https://docs.rs/tokio/1.11.0/tokio/sync/broadcast/index.html
 
 '''
@@ -382,7 +382,7 @@ class BroadcastReceiver(ReceiveChannel):
                         # likely it makes sense to unwind back to the
                         # underlying?
                         # import tractor
-                        # await tractor.pause()
+                        # await tractor.breakpoint()
                         log.warning(
                             f'Only one sub left for {self}?\n'
                             'We can probably unwind from breceiver?'

tractor/trionics/_mngrs.py

@@ -57,8 +57,6 @@ async def maybe_open_nursery(
     shield: bool = False,
     lib: ModuleType = trio,
 
-    **kwargs,  # proxy thru
-
 ) -> AsyncGenerator[trio.Nursery, Any]:
     '''
     Create a new nursery if None provided.
@@ -69,7 +67,7 @@ async def maybe_open_nursery(
     if nursery is not None:
         yield nursery
     else:
-        async with lib.open_nursery(**kwargs) as nursery:
+        async with lib.open_nursery() as nursery:
             nursery.cancel_scope.shield = shield
             yield nursery
 
@@ -145,14 +143,9 @@ async def gather_contexts(
             'Use a non-lazy iterator or sequence type intead!'
         )
 
-    async with trio.open_nursery(
+    async with trio.open_nursery() as n:
-        strict_exception_groups=False,
-        # ^XXX^ TODO? soo roll our own then ??
-        # -> since we kinda want the "if only one `.exception` then
-        # just raise that" interface?
-    ) as tn:
         for mngr in mngrs:
-            tn.start_soon(
+            n.start_soon(
                 _enter_and_wait,
                 mngr,
                 unwrapped,

uv.lock

@@ -126,31 +126,7 @@ wheels = [
 [[package]]
 name = "msgspec"
 version = "0.19.0"
-source = { registry = "https://pypi.org/simple" }
+source = { git = "https://github.com/jcrist/msgspec.git#dd965dce22e5278d4935bea923441ecde31b5325" }
-sdist = { url = "https://files.pythonhosted.org/packages/cf/9b/95d8ce458462b8b71b8a70fa94563b2498b89933689f3a7b8911edfae3d7/msgspec-0.19.0.tar.gz", hash = "sha256:604037e7cd475345848116e89c553aa9a233259733ab51986ac924ab1b976f8e", size = 216934 }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/24/d4/2ec2567ac30dab072cce3e91fb17803c52f0a37aab6b0c24375d2b20a581/msgspec-0.19.0-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:aa77046904db764b0462036bc63ef71f02b75b8f72e9c9dd4c447d6da1ed8f8e", size = 187939 },
-    { url = "https://files.pythonhosted.org/packages/2b/c0/18226e4328897f4f19875cb62bb9259fe47e901eade9d9376ab5f251a929/msgspec-0.19.0-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:047cfa8675eb3bad68722cfe95c60e7afabf84d1bd8938979dd2b92e9e4a9551", size = 182202 },
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-]
 
 [[package]]
 name = "outcome"
@@ -264,7 +240,7 @@ wheels = [
 
 [[package]]
 name = "pytest"
-version = "8.3.5"
+version = "8.3.4"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "colorama", marker = "sys_platform == 'win32'" },
@@ -272,9 +248,9 @@ dependencies = [
     { name = "packaging" },
     { name = "pluggy" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/ae/3c/c9d525a414d506893f0cd8a8d0de7706446213181570cdbd766691164e40/pytest-8.3.5.tar.gz", hash = "sha256:f4efe70cc14e511565ac476b57c279e12a855b11f48f212af1080ef2263d3845", size = 1450891 }
+sdist = { url = "https://files.pythonhosted.org/packages/05/35/30e0d83068951d90a01852cb1cef56e5d8a09d20c7f511634cc2f7e0372a/pytest-8.3.4.tar.gz", hash = "sha256:965370d062bce11e73868e0335abac31b4d3de0e82f4007408d242b4f8610761", size = 1445919 }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/30/3d/64ad57c803f1fa1e963a7946b6e0fea4a70df53c1a7fed304586539c2bac/pytest-8.3.5-py3-none-any.whl", hash = "sha256:c69214aa47deac29fad6c2a4f590b9c4a9fdb16a403176fe154b79c0b4d4d820", size = 343634 },
+    { url = "https://files.pythonhosted.org/packages/11/92/76a1c94d3afee238333bc0a42b82935dd8f9cf8ce9e336ff87ee14d9e1cf/pytest-8.3.4-py3-none-any.whl", hash = "sha256:50e16d954148559c9a74109af1eaf0c945ba2d8f30f0a3d3335edde19788b6f6", size = 343083 },
 ]
 
 [[package]]
@@ -338,15 +314,17 @@ dev = [
     { name = "pytest" },
     { name = "stackscope" },
     { name = "xonsh" },
+    { name = "xonsh-vox-tabcomplete" },
+    { name = "xontrib-vox" },
 ]
 
 [package.metadata]
 requires-dist = [
     { name = "colorlog", specifier = ">=6.8.2,<7" },
-    { name = "msgspec", specifier = ">=0.19.0" },
+    { name = "msgspec", git = "https://github.com/jcrist/msgspec.git" },
-    { name = "pdbp", specifier = ">=1.6,<2" },
+    { name = "pdbp", specifier = ">=1.5.0,<2" },
     { name = "tricycle", specifier = ">=0.4.1,<0.5" },
-    { name = "trio", specifier = ">0.27" },
+    { name = "trio", specifier = ">=0.24,<0.25" },
     { name = "wrapt", specifier = ">=1.16.0,<2" },
 ]
 
@@ -354,11 +332,13 @@ requires-dist = [
 dev = [
     { name = "greenback", specifier = ">=1.2.1,<2" },
     { name = "pexpect", specifier = ">=4.9.0,<5" },
-    { name = "prompt-toolkit", specifier = ">=3.0.50" },
+    { name = "prompt-toolkit", specifier = ">=3.0.43,<4" },
     { name = "pyperclip", specifier = ">=1.9.0" },
-    { name = "pytest", specifier = ">=8.3.5" },
+    { name = "pytest", specifier = ">=8.2.0,<9" },
     { name = "stackscope", specifier = ">=0.2.2,<0.3" },
-    { name = "xonsh", specifier = ">=0.19.2" },
+    { name = "xonsh", specifier = ">=0.19.1" },
+    { name = "xonsh-vox-tabcomplete", specifier = ">=0.5,<0.6" },
+    { name = "xontrib-vox", specifier = ">=0.0.1,<0.0.2" },
 ]
 
 [[package]]
@@ -375,7 +355,7 @@ wheels = [
 
 [[package]]
 name = "trio"
-version = "0.29.0"
+version = "0.24.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "attrs" },
@@ -385,9 +365,9 @@ dependencies = [
     { name = "sniffio" },
     { name = "sortedcontainers" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/a1/47/f62e62a1a6f37909aed0bf8f5d5411e06fa03846cfcb64540cd1180ccc9f/trio-0.29.0.tar.gz", hash = "sha256:ea0d3967159fc130acb6939a0be0e558e364fee26b5deeecc893a6b08c361bdf", size = 588952 }
+sdist = { url = "https://files.pythonhosted.org/packages/8a/f3/07c152213222c615fe2391b8e1fea0f5af83599219050a549c20fcbd9ba2/trio-0.24.0.tar.gz", hash = "sha256:ffa09a74a6bf81b84f8613909fb0beaee84757450183a7a2e0b47b455c0cac5d", size = 545131 }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/c9/55/c4d9bea8b3d7937901958f65124123512419ab0eb73695e5f382521abbfb/trio-0.29.0-py3-none-any.whl", hash = "sha256:d8c463f1a9cc776ff63e331aba44c125f423a5a13c684307e828d930e625ba66", size = 492920 },
+    { url = "https://files.pythonhosted.org/packages/14/fb/9299cf74953f473a15accfdbe2c15218e766bae8c796f2567c83bae03e98/trio-0.24.0-py3-none-any.whl", hash = "sha256:c3bd3a4e3e3025cd9a2241eae75637c43fe0b9e88b4c97b9161a55b9e54cd72c", size = 460205 },
 ]
 
 [[package]]
@@ -454,13 +434,33 @@ wheels = [
 
 [[package]]
 name = "xonsh"
-version = "0.19.2"
+version = "0.19.1"
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