Add a `debug_mode`-state reversion test

Particularly on a get-attr of `StackLevelAdapter.handlers` which, when
a `logger: StackLevelAdapter` is passed, we need to *not call* our own
`get_logger()` and just set is as the `log`. Fix the typing to match.

tests/conftest.py

@@ -6,21 +6,22 @@ from __future__ import annotations
 import sys
 import subprocess
 import os
-import random
 import signal
 import platform
 import time
 
 import pytest
-import tractor
 from tractor._testing import (
     examples_dir as examples_dir,
     tractor_test as tractor_test,
     expect_ctxc as expect_ctxc,
 )
 
-# TODO: include wtv plugin(s) we build in `._testing.pytest`?
-pytest_plugins = ['pytester']
+pytest_plugins: list[str] = [
+    'pytester',
+    'tractor._testing.pytest',
+]
+
 
 # Sending signal.SIGINT on subprocess fails on windows. Use CTRL_* alternatives
 if platform.system() == 'Windows':
@@ -48,6 +49,9 @@ no_windows = pytest.mark.skipif(
 def pytest_addoption(
     parser: pytest.Parser,
 ):
+    # ?TODO? should this be exposed from our `._testing.pytest`
+    # plugin or should we make it more explicit with `--tl` for
+    # tractor logging like we do in other client projects?
     parser.addoption(
         "--ll",
         action="store",
@@ -55,54 +59,10 @@ def pytest_addoption(
         default='ERROR', help="logging level to set when testing"
     )
 
-    parser.addoption(
-        "--spawn-backend",
-        action="store",
-        dest='spawn_backend',
-        default='trio',
-        help="Processing spawning backend to use for test run",
-    )
-
-    parser.addoption(
-        "--tpdb",
-        "--debug-mode",
-        action="store_true",
-        dest='tractor_debug_mode',
-        # default=False,
-        help=(
-            'Enable a flag that can be used by tests to to set the '
-            '`debug_mode: bool` for engaging the internal '
-            'multi-proc debugger sys.'
-        ),
-    )
-
-    # provide which IPC transport protocols opting-in test suites
-    # should accumulatively run against.
-    parser.addoption(
-        "--tpt-proto",
-        nargs='+',  # accumulate-multiple-args
-        action="store",
-        dest='tpt_protos',
-        default=['tcp'],
-        help="Transport protocol to use under the `tractor.ipc.Channel`",
-    )
-
-
-def pytest_configure(config):
-    backend = config.option.spawn_backend
-    tractor._spawn.try_set_start_method(backend)
-
-
-@pytest.fixture(scope='session')
-def debug_mode(request) -> bool:
-    debug_mode: bool = request.config.option.tractor_debug_mode
-    # if debug_mode:
-    #     breakpoint()
-    return debug_mode
-
 
 @pytest.fixture(scope='session', autouse=True)
 def loglevel(request):
+    import tractor
     orig = tractor.log._default_loglevel
     level = tractor.log._default_loglevel = request.config.option.loglevel
     tractor.log.get_console_log(level)
@@ -110,49 +70,6 @@ def loglevel(request):
     tractor.log._default_loglevel = orig
 
 
-@pytest.fixture(scope='session')
-def spawn_backend(request) -> str:
-    return request.config.option.spawn_backend
-
-
-@pytest.fixture(scope='session')
-def tpt_protos(request) -> list[str]:
-
-    # allow quoting on CLI
-    proto_keys: list[str] = [
-        proto_key.replace('"', '').replace("'", "")
-        for proto_key in request.config.option.tpt_protos
-    ]
-
-    # ?TODO, eventually support multiple protos per test-sesh?
-    if len(proto_keys) > 1:
-        pytest.fail(
-            'We only support one `--tpt-proto <key>` atm!\n'
-        )
-
-    # XXX ensure we support the protocol by name via lookup!
-    for proto_key in proto_keys:
-        addr_type = tractor._addr._address_types[proto_key]
-        assert addr_type.proto_key == proto_key
-
-    yield proto_keys
-
-
-@pytest.fixture(
-    scope='session',
-    autouse=True,
-)
-def tpt_proto(
-    tpt_protos: list[str],
-) -> str:
-    proto_key: str = tpt_protos[0]
-    from tractor import _state
-    if _state._def_tpt_proto != proto_key:
-        _state._def_tpt_proto = proto_key
-    # breakpoint()
-    yield proto_key
-
-
 _ci_env: bool = os.environ.get('CI', False)
 
 
@@ -165,80 +82,6 @@ def ci_env() -> bool:
     return _ci_env
 
 
-# TODO: also move this to `._testing` for now?
-# -[ ] possibly generalize and re-use for multi-tree spawning
-#    along with the new stuff for multi-addrs?
-#
-# choose random port at import time
-_rando_port: str = random.randint(1000, 9999)
-
-
-@pytest.fixture(scope='session')
-def reg_addr(
-    tpt_proto: str,
-) -> tuple[str, int|str]:
-
-    # globally override the runtime to the per-test-session-dynamic
-    # addr so that all tests never conflict with any other actor
-    # tree using the default.
-    from tractor import (
-        _addr,
-    )
-    addr_type = _addr._address_types[tpt_proto]
-    def_reg_addr: tuple[str, int] = _addr._default_lo_addrs[tpt_proto]
-
-    testrun_reg_addr: tuple[str, int]
-    match tpt_proto:
-        case 'tcp':
-            testrun_reg_addr = (
-                addr_type.def_bindspace,
-                _rando_port,
-            )
-
-        # NOTE, file-name uniqueness (no-collisions) will be based on
-        # the runtime-directory and root (pytest-proc's) pid.
-        case 'uds':
-            testrun_reg_addr = addr_type.get_random().unwrap()
-
-    assert def_reg_addr != testrun_reg_addr
-    return testrun_reg_addr
-
-
-def pytest_generate_tests(metafunc):
-    spawn_backend: str = metafunc.config.option.spawn_backend
-
-    if not spawn_backend:
-        # XXX some weird windows bug with `pytest`?
-        spawn_backend = 'trio'
-
-    # TODO: maybe just use the literal `._spawn.SpawnMethodKey`?
-    assert spawn_backend in (
-        'mp_spawn',
-        'mp_forkserver',
-        'trio',
-    )
-
-    # NOTE: used-to-be-used-to dyanmically parametrize tests for when
-    # you just passed --spawn-backend=`mp` on the cli, but now we expect
-    # that cli input to be manually specified, BUT, maybe we'll do
-    # something like this again in the future?
-    if 'start_method' in metafunc.fixturenames:
-        metafunc.parametrize(
-            "start_method",
-            [spawn_backend],
-            scope='module',
-        )
-
-    # TODO, parametrize any `tpt_proto: str` declaring tests!
-    # proto_tpts: list[str] = metafunc.config.option.proto_tpts
-    # if 'tpt_proto' in metafunc.fixturenames:
-    #     metafunc.parametrize(
-    #         'tpt_proto',
-    #         proto_tpts,  # TODO, double check this list usage!
-    #         scope='module',
-    #     )
-
-
 def sig_prog(
     proc: subprocess.Popen,
     sig: int,

tests/ipc/__init__.py

@@ -0,0 +1,4 @@
+'''
+`tractor.ipc` subsystem(s)/unit testing suites.
+
+'''

tests/ipc/test_server.py

@@ -0,0 +1,72 @@
+'''
+High-level `.ipc._server` unit tests.
+
+'''
+from __future__ import annotations
+
+import pytest
+import trio
+from tractor import (
+    devx,
+    ipc,
+    log,
+)
+from tractor._testing.addr import (
+    get_rando_addr,
+)
+# TODO, use/check-roundtripping with some of these wrapper types?
+#
+# from .._addr import Address
+# from ._chan import Channel
+# from ._transport import MsgTransport
+# from ._uds import UDSAddress
+# from ._tcp import TCPAddress
+
+
+@pytest.mark.parametrize(
+    '_tpt_proto',
+    ['uds', 'tcp']
+)
+def test_basic_ipc_server(
+    _tpt_proto: str,
+    debug_mode: bool,
+    loglevel: str,
+):
+
+    # so we see the socket-listener reporting on console
+    log.get_console_log("INFO")
+
+    rando_addr: tuple = get_rando_addr(
+        tpt_proto=_tpt_proto,
+    )
+    async def main():
+        async with ipc._server.open_ipc_server() as server:
+
+            assert (
+                server._parent_tn
+                and
+                server._parent_tn is server._stream_handler_tn
+            )
+            assert server._no_more_peers.is_set()
+
+            eps: list[ipc.IPCEndpoint] = await server.listen_on(
+                accept_addrs=[rando_addr],
+                stream_handler_nursery=None,
+            )
+            assert (
+                len(eps) == 1
+                and
+                (ep := eps[0])._listener
+                and
+                not ep.peer_tpts
+            )
+
+            server._parent_tn.cancel_scope.cancel()
+
+        # !TODO! actually make a bg-task connection from a client
+        # using `ipc._chan._connect_chan()`
+
+    with devx.maybe_open_crash_handler(
+        pdb=debug_mode,
+    ):
+        trio.run(main)

tests/test_root_runtime.py

@@ -83,3 +83,26 @@ def test_implicit_root_via_first_nursery(
             assert tractor.current_actor().aid.name == 'root'
 
     trio.run(main)
+
+
+def test_runtime_vars_unset(
+    reg_addr: tuple,
+    debug_mode: bool
+):
+    '''
+    Ensure any `._state._runtime_vars` are restored to default values
+    after the root actor-runtime exits!
+
+    '''
+    assert not tractor._state._runtime_vars['_debug_mode']
+    async def main():
+        assert not tractor._state._runtime_vars['_debug_mode']
+        async with tractor.open_nursery(
+            debug_mode=True,
+        ):
+            assert tractor._state._runtime_vars['_debug_mode']
+
+        # after runtime closure, should be reverted!
+        assert not tractor._state._runtime_vars['_debug_mode']
+
+    trio.run(main)

tractor/_entry.py

@@ -22,7 +22,6 @@ from __future__ import annotations
 from functools import partial
 import multiprocessing as mp
 import os
-import textwrap
 from typing import (
     Any,
     TYPE_CHECKING,
@@ -35,7 +34,10 @@ from .log import (
     get_logger,
 )
 from . import _state
-from .devx import _debug
+from .devx import (
+    _debug,
+    pformat,
+)
 from .to_asyncio import run_as_asyncio_guest
 from ._addr import UnwrappedAddress
 from ._runtime import (
@@ -103,107 +105,6 @@ def _mp_main(
         )
 
 
-# TODO: move this func to some kinda `.devx._conc_lang.py` eventually
-# as we work out our multi-domain state-flow-syntax!
-def nest_from_op(
-    input_op: str,
-    #
-    # ?TODO? an idea for a syntax to the state of concurrent systems
-    # as a "3-domain" (execution, scope, storage) model and using
-    # a minimal ascii/utf-8 operator-set.
-    #
-    # try not to take any of this seriously yet XD
-    #
-    # > is a "play operator" indicating (CPU bound)
-    #   exec/work/ops required at the "lowest level computing"
-    #
-    # execution primititves (tasks, threads, actors..) denote their
-    # lifetime with '(' and ')' since parentheses normally are used
-    # in many langs to denote function calls.
-    #
-    # starting = (
-    # >(  opening/starting; beginning of the thread-of-exec (toe?)
-    # (>  opened/started,  (finished spawning toe)
-    # |_<Task: blah blah..>  repr of toe, in py these look like <objs>
-    #
-    # >) closing/exiting/stopping,
-    # )> closed/exited/stopped,
-    # |_<Task: blah blah..>
-    #   [OR <), )< ?? ]
-    #
-    # ending = )
-    # >c) cancelling to close/exit
-    # c)> cancelled (caused close), OR?
-    #  |_<Actor: ..>
-    #   OR maybe "<c)" which better indicates the cancel being
-    #   "delivered/returned" / returned" to LHS?
-    #
-    # >x)  erroring to eventuall exit
-    # x)>  errored and terminated
-    #  |_<Actor: ...>
-    #
-    # scopes: supers/nurseries, IPC-ctxs, sessions, perms, etc.
-    # >{  opening
-    # {>  opened
-    # }>  closed
-    # >}  closing
-    #
-    # storage: like queues, shm-buffers, files, etc..
-    # >[  opening
-    # [>  opened
-    #  |_<FileObj: ..>
-    #
-    # >]  closing
-    # ]>  closed
-
-    # IPC ops: channels, transports, msging
-    # =>  req msg
-    # <=  resp msg
-    # <=> 2-way streaming (of msgs)
-    # <-  recv 1 msg
-    # ->  send 1 msg
-    #
-    # TODO: still not sure on R/L-HS approach..?
-    # =>(  send-req to exec start (task, actor, thread..)
-    # (<=  recv-req to ^
-    #
-    # (<=  recv-req ^
-    # <=(  recv-resp opened remote exec primitive
-    # <=)  recv-resp closed
-    #
-    # )<=c req to stop due to cancel
-    # c=>) req to stop due to cancel
-    #
-    # =>{  recv-req to open
-    # <={  send-status that it closed
-
-    tree_str: str,
-
-    # NOTE: so move back-from-the-left of the `input_op` by
-    # this amount.
-    back_from_op: int = 0,
-) -> str:
-    '''
-    Depth-increment the input (presumably hierarchy/supervision)
-    input "tree string" below the provided `input_op` execution
-    operator, so injecting a `"\n|_{input_op}\n"`and indenting the
-    `tree_str` to nest content aligned with the ops last char.
-
-    '''
-    return (
-        f'{input_op}\n'
-        +
-        textwrap.indent(
-            tree_str,
-            prefix=(
-                len(input_op)
-                -
-                (back_from_op + 1)
-            ) * ' ',
-        )
-    )
-
-
 def _trio_main(
     actor: Actor,
     *,
@@ -236,7 +137,7 @@ def _trio_main(
         log.info(
             'Starting new `trio` subactor:\n'
             +
-            nest_from_op(
+            pformat.nest_from_op(
                 input_op='>(',  # see syntax ideas above
                 tree_str=actor_info,
                 back_from_op=2,  # since "complete"
@@ -246,7 +147,7 @@ def _trio_main(
     exit_status: str = (
         'Subactor exited\n'
         +
-        nest_from_op(
+        pformat.nest_from_op(
             input_op=')>',  # like a "closed-to-play"-icon from super perspective
             tree_str=actor_info,
             back_from_op=1,
@@ -264,7 +165,7 @@ def _trio_main(
         exit_status: str = (
             'Actor received KBI (aka an OS-cancel)\n'
             +
-            nest_from_op(
+            pformat.nest_from_op(
                 input_op='c)>',  # closed due to cancel (see above)
                 tree_str=actor_info,
             )
@@ -274,7 +175,7 @@ def _trio_main(
         exit_status: str = (
             'Main actor task exited due to crash?\n'
             +
-            nest_from_op(
+            pformat.nest_from_op(
                 input_op='x)>',  # closed by error
                 tree_str=actor_info,
             )

tractor/_portal.py

@@ -582,8 +582,7 @@ async def open_portal(
             msg_loop_cs = await tn.start(
                 partial(
                     _rpc.process_messages,
-                    actor,
-                    channel,
+                    chan=channel,
                     # if the local task is cancelled we want to keep
                     # the msg loop running until our block ends
                     shield=True,

tractor/_root.py

@@ -276,7 +276,8 @@ async def open_root_actor(
 
         if (
             debug_mode
-            and _spawn._spawn_method == 'trio'
+            and
+            _spawn._spawn_method == 'trio'
         ):
             _state._runtime_vars['_debug_mode'] = True
 
@@ -512,8 +513,17 @@ async def open_root_actor(
                     )
                     await actor.cancel(None)  # self cancel
         finally:
+            # revert all process-global runtime state
+            if (
+                debug_mode
+                and
+                _spawn._spawn_method == 'trio'
+            ):
+                _state._runtime_vars['_debug_mode'] = False
+
             _state._current_actor = None
             _state._last_actor_terminated = actor
+
             logger.runtime(
                 f'Root actor terminated\n'
                 f')>\n'

tractor/_rpc.py

@@ -869,7 +869,6 @@ async def try_ship_error_to_remote(
 
 
 async def process_messages(
-    actor: Actor,
     chan: Channel,
     shield: bool = False,
     task_status: TaskStatus[CancelScope] = trio.TASK_STATUS_IGNORED,
@@ -907,6 +906,7 @@ async def process_messages(
       (as utilized inside `Portal.cancel_actor()` ).
 
     '''
+    actor: Actor = _state.current_actor()
     assert actor._service_n  # runtime state sanity
 
     # TODO: once `trio` get's an "obvious way" for req/resp we

tractor/_runtime.py

@@ -1262,6 +1262,10 @@ async def async_main(
     the actor's "runtime" and all thus all ongoing RPC tasks.
 
     '''
+    # XXX NOTE, `_state._current_actor` **must** be set prior to
+    # calling this core runtime entrypoint!
+    assert actor is _state.current_actor()
+
     actor._task: trio.Task = trio.lowlevel.current_task()
 
     # attempt to retreive ``trio``'s sigint handler and stash it
@@ -1321,7 +1325,6 @@ async def async_main(
                 ) as service_nursery,
 
                 _server.open_ipc_server(
-                    actor=actor,
                     parent_tn=service_nursery,
                     stream_handler_tn=service_nursery,
                 ) as ipc_server,
@@ -1375,7 +1378,6 @@ async def async_main(
                         'Booting IPC server'
                     )
                     eps: list = await ipc_server.listen_on(
-                        actor=actor,
                         accept_addrs=accept_addrs,
                         stream_handler_nursery=service_nursery,
                     )
@@ -1460,8 +1462,7 @@ async def async_main(
                     await root_nursery.start(
                         partial(
                             _rpc.process_messages,
-                            actor,
-                            actor._parent_chan,
+                            chan=actor._parent_chan,
                             shield=True,
                         )
                     )

tractor/_testing/__init__.py

@@ -37,6 +37,9 @@ from .fault_simulation import (
 )
 
 
+# TODO, use dulwhich for this instead?
+# -> we're going to likely need it (or something similar)
+#   for supporting hot-coad reload feats eventually anyway!
 def repodir() -> pathlib.Path:
     '''
     Return the abspath to the repo directory.

tractor/_testing/addr.py

@@ -0,0 +1,70 @@
+# 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/>.
+
+'''
+Random IPC addr generation for isolating
+the discovery space between test sessions.
+
+Might be eventually useful to expose as a util set from
+our `tractor.discovery` subsys?
+
+'''
+import random
+from typing import (
+    Type,
+)
+from tractor import (
+    _addr,
+)
+
+
+def get_rando_addr(
+    tpt_proto: str,
+    *,
+
+    # choose random port at import time
+    _rando_port: str = random.randint(1000, 9999)
+
+) -> tuple[str, str|int]:
+    '''
+    Used to globally override the runtime to the
+    per-test-session-dynamic addr so that all tests never conflict
+    with any other actor tree using the default.
+
+    '''
+    addr_type: Type[_addr.Addres] = _addr._address_types[tpt_proto]
+    def_reg_addr: tuple[str, int] = _addr._default_lo_addrs[tpt_proto]
+
+    # this is the "unwrapped" form expected to be passed to
+    # `.open_root_actor()` by test body.
+    testrun_reg_addr: tuple[str, int|str]
+    match tpt_proto:
+        case 'tcp':
+            testrun_reg_addr = (
+                addr_type.def_bindspace,
+                _rando_port,
+            )
+
+        # NOTE, file-name uniqueness (no-collisions) will be based on
+        # the runtime-directory and root (pytest-proc's) pid.
+        case 'uds':
+            testrun_reg_addr = addr_type.get_random().unwrap()
+
+    # XXX, as sanity it should never the same as the default for the
+    # host-singleton registry actor.
+    assert def_reg_addr != testrun_reg_addr
+
+    return testrun_reg_addr

tractor/_testing/pytest.py

@@ -26,29 +26,46 @@ from functools import (
 import inspect
 import platform
 
+import pytest
 import tractor
 import trio
 
 
 def tractor_test(fn):
     '''
-    Decorator for async test funcs to present them as "native"
-    looking sync funcs runnable by `pytest` using `trio.run()`.
+    Decorator for async test fns to decorator-wrap them as "native"
+    looking sync funcs runnable by `pytest` and auto invoked with
+    `trio.run()` (much like the `pytest-trio` plugin's approach).
 
-    Use:
+    Further the test fn body will be invoked AFTER booting the actor
+    runtime, i.e. from inside a `tractor.open_root_actor()` block AND
+    with various runtime and tooling parameters implicitly passed as
+    requested by by the test session's config; see immediately below.
 
-    @tractor_test
-    async def test_whatever():
-        await ...
+    Basic deco use:
+    ---------------
 
-    If fixtures:
+      @tractor_test
+      async def test_whatever():
+          await ...
 
-        - ``reg_addr`` (a socket addr tuple where arbiter is listening)
-        - ``loglevel`` (logging level passed to tractor internals)
-        - ``start_method`` (subprocess spawning backend)
 
-    are defined in the `pytest` fixture space they will be automatically
-    injected to tests declaring these funcargs.
+    Runtime config via special fixtures:
+    ------------------------------------
+    If any of the following fixture are requested by the wrapped test
+    fn (via normal func-args declaration),
+
+    - `reg_addr` (a socket addr tuple where arbiter is listening)
+    - `loglevel` (logging level passed to tractor internals)
+    - `start_method` (subprocess spawning backend)
+
+    (TODO support)
+    - `tpt_proto` (IPC transport protocol key)
+
+    they will be automatically injected to each test as normally
+    expected as well as passed to the initial
+    `tractor.open_root_actor()` funcargs.
+
     '''
     @wraps(fn)
     def wrapper(
@@ -111,3 +128,164 @@ def tractor_test(fn):
         return trio.run(main)
 
     return wrapper
+
+
+def pytest_addoption(
+    parser: pytest.Parser,
+):
+    # parser.addoption(
+    #     "--ll",
+    #     action="store",
+    #     dest='loglevel',
+    #     default='ERROR', help="logging level to set when testing"
+    # )
+
+    parser.addoption(
+        "--spawn-backend",
+        action="store",
+        dest='spawn_backend',
+        default='trio',
+        help="Processing spawning backend to use for test run",
+    )
+
+    parser.addoption(
+        "--tpdb",
+        "--debug-mode",
+        action="store_true",
+        dest='tractor_debug_mode',
+        # default=False,
+        help=(
+            'Enable a flag that can be used by tests to to set the '
+            '`debug_mode: bool` for engaging the internal '
+            'multi-proc debugger sys.'
+        ),
+    )
+
+    # provide which IPC transport protocols opting-in test suites
+    # should accumulatively run against.
+    parser.addoption(
+        "--tpt-proto",
+        nargs='+',  # accumulate-multiple-args
+        action="store",
+        dest='tpt_protos',
+        default=['tcp'],
+        help="Transport protocol to use under the `tractor.ipc.Channel`",
+    )
+
+
+def pytest_configure(config):
+    backend = config.option.spawn_backend
+    tractor._spawn.try_set_start_method(backend)
+
+
+@pytest.fixture(scope='session')
+def debug_mode(request) -> bool:
+    '''
+    Flag state for whether `--tpdb` (for `tractor`-py-debugger)
+    was passed to the test run.
+
+    Normally tests should pass this directly to `.open_root_actor()`
+    to allow the user to opt into suite-wide crash handling.
+
+    '''
+    debug_mode: bool = request.config.option.tractor_debug_mode
+    return debug_mode
+
+
+@pytest.fixture(scope='session')
+def spawn_backend(request) -> str:
+    return request.config.option.spawn_backend
+
+
+@pytest.fixture(scope='session')
+def tpt_protos(request) -> list[str]:
+
+    # allow quoting on CLI
+    proto_keys: list[str] = [
+        proto_key.replace('"', '').replace("'", "")
+        for proto_key in request.config.option.tpt_protos
+    ]
+
+    # ?TODO, eventually support multiple protos per test-sesh?
+    if len(proto_keys) > 1:
+        pytest.fail(
+            'We only support one `--tpt-proto <key>` atm!\n'
+        )
+
+    # XXX ensure we support the protocol by name via lookup!
+    for proto_key in proto_keys:
+        addr_type = tractor._addr._address_types[proto_key]
+        assert addr_type.proto_key == proto_key
+
+    yield proto_keys
+
+
+@pytest.fixture(
+    scope='session',
+    autouse=True,
+)
+def tpt_proto(
+    tpt_protos: list[str],
+) -> str:
+    proto_key: str = tpt_protos[0]
+
+    from tractor import _state
+    if _state._def_tpt_proto != proto_key:
+        _state._def_tpt_proto = proto_key
+
+    yield proto_key
+
+
+@pytest.fixture(scope='session')
+def reg_addr(
+    tpt_proto: str,
+) -> tuple[str, int|str]:
+    '''
+    Deliver a test-sesh unique registry address such
+    that each run's (tests which use this fixture) will
+    have no conflicts/cross-talk when running simultaneously
+    nor will interfere with other live `tractor` apps active
+    on the same network-host (namespace).
+
+    '''
+    from tractor._testing.addr import get_rando_addr
+    return get_rando_addr(
+        tpt_proto=tpt_proto,
+    )
+
+
+def pytest_generate_tests(
+    metafunc: pytest.Metafunc,
+):
+    spawn_backend: str = metafunc.config.option.spawn_backend
+
+    if not spawn_backend:
+        # XXX some weird windows bug with `pytest`?
+        spawn_backend = 'trio'
+
+    # TODO: maybe just use the literal `._spawn.SpawnMethodKey`?
+    assert spawn_backend in (
+        'mp_spawn',
+        'mp_forkserver',
+        'trio',
+    )
+
+    # NOTE: used-to-be-used-to dyanmically parametrize tests for when
+    # you just passed --spawn-backend=`mp` on the cli, but now we expect
+    # that cli input to be manually specified, BUT, maybe we'll do
+    # something like this again in the future?
+    if 'start_method' in metafunc.fixturenames:
+        metafunc.parametrize(
+            "start_method",
+            [spawn_backend],
+            scope='module',
+        )
+
+    # TODO, parametrize any `tpt_proto: str` declaring tests!
+    # proto_tpts: list[str] = metafunc.config.option.proto_tpts
+    # if 'tpt_proto' in metafunc.fixturenames:
+    #     metafunc.parametrize(
+    #         'tpt_proto',
+    #         proto_tpts,  # TODO, double check this list usage!
+    #         scope='module',
+    #     )

tractor/devx/_debug.py

@@ -3280,7 +3280,7 @@ def open_crash_handler(
 
 @cm
 def maybe_open_crash_handler(
-    pdb: bool = False,
+    pdb: bool|None = None,
     tb_hide: bool = True,
 
     **kwargs,
@@ -3291,7 +3291,11 @@ def maybe_open_crash_handler(
 
     Normally this is used with CLI endpoints such that if the --pdb
     flag is passed the pdb REPL is engaed on any crashes B)
+
     '''
+    if pdb is None:
+        pdb: bool = _state.is_debug_mode()
+
     __tracebackhide__: bool = tb_hide
 
     rtctx = nullcontext(

tractor/devx/pformat.py

@@ -247,3 +247,104 @@ def pformat_cs(
         +
         fields
     )
+
+
+# TODO: move this func to some kinda `.devx.pformat.py` eventually
+# as we work out our multi-domain state-flow-syntax!
+def nest_from_op(
+    input_op: str,
+    #
+    # ?TODO? an idea for a syntax to the state of concurrent systems
+    # as a "3-domain" (execution, scope, storage) model and using
+    # a minimal ascii/utf-8 operator-set.
+    #
+    # try not to take any of this seriously yet XD
+    #
+    # > is a "play operator" indicating (CPU bound)
+    #   exec/work/ops required at the "lowest level computing"
+    #
+    # execution primititves (tasks, threads, actors..) denote their
+    # lifetime with '(' and ')' since parentheses normally are used
+    # in many langs to denote function calls.
+    #
+    # starting = (
+    # >(  opening/starting; beginning of the thread-of-exec (toe?)
+    # (>  opened/started,  (finished spawning toe)
+    # |_<Task: blah blah..>  repr of toe, in py these look like <objs>
+    #
+    # >) closing/exiting/stopping,
+    # )> closed/exited/stopped,
+    # |_<Task: blah blah..>
+    #   [OR <), )< ?? ]
+    #
+    # ending = )
+    # >c) cancelling to close/exit
+    # c)> cancelled (caused close), OR?
+    #  |_<Actor: ..>
+    #   OR maybe "<c)" which better indicates the cancel being
+    #   "delivered/returned" / returned" to LHS?
+    #
+    # >x)  erroring to eventuall exit
+    # x)>  errored and terminated
+    #  |_<Actor: ...>
+    #
+    # scopes: supers/nurseries, IPC-ctxs, sessions, perms, etc.
+    # >{  opening
+    # {>  opened
+    # }>  closed
+    # >}  closing
+    #
+    # storage: like queues, shm-buffers, files, etc..
+    # >[  opening
+    # [>  opened
+    #  |_<FileObj: ..>
+    #
+    # >]  closing
+    # ]>  closed
+
+    # IPC ops: channels, transports, msging
+    # =>  req msg
+    # <=  resp msg
+    # <=> 2-way streaming (of msgs)
+    # <-  recv 1 msg
+    # ->  send 1 msg
+    #
+    # TODO: still not sure on R/L-HS approach..?
+    # =>(  send-req to exec start (task, actor, thread..)
+    # (<=  recv-req to ^
+    #
+    # (<=  recv-req ^
+    # <=(  recv-resp opened remote exec primitive
+    # <=)  recv-resp closed
+    #
+    # )<=c req to stop due to cancel
+    # c=>) req to stop due to cancel
+    #
+    # =>{  recv-req to open
+    # <={  send-status that it closed
+
+    tree_str: str,
+
+    # NOTE: so move back-from-the-left of the `input_op` by
+    # this amount.
+    back_from_op: int = 0,
+) -> str:
+    '''
+    Depth-increment the input (presumably hierarchy/supervision)
+    input "tree string" below the provided `input_op` execution
+    operator, so injecting a `"\n|_{input_op}\n"`and indenting the
+    `tree_str` to nest content aligned with the ops last char.
+
+    '''
+    return (
+        f'{input_op}\n'
+        +
+        textwrap.indent(
+            tree_str,
+            prefix=(
+                len(input_op)
+                -
+                (back_from_op + 1)
+            ) * ' ',
+        )
+    )

tractor/ipc/_server.py

@@ -72,11 +72,223 @@ if TYPE_CHECKING:
 log = log.get_logger(__name__)
 
 
+async def maybe_wait_on_canced_subs(
+    uid: tuple[str, str],
+    chan: Channel,
+    disconnected: bool,
+
+    actor: Actor|None = None,
+    chan_drain_timeout: float = 0.5,
+    an_exit_timeout: float = 0.5,
+
+) -> ActorNursery|None:
+    '''
+    When a process-local actor-nursery is found for the given actor
+    `uid` (i.e. that peer is **also** a subactor of this parent), we
+    attempt to (with timeouts) wait on,
+
+    - all IPC msgs to drain on the (common) `Channel` such that all
+      local `Context`-parent-tasks can also gracefully collect
+      `ContextCancelled` msgs from their respective remote children
+      vs. a `chan_drain_timeout`.
+
+    - the actor-nursery to cancel-n-join all its supervised children
+      (processes) *gracefully* vs. a `an_exit_timeout` and thus also
+      detect cases where the IPC transport connection broke but
+      a sub-process is detected as still alive (a case that happens
+      when the subactor is still in an active debugger REPL session).
+
+    If the timeout expires in either case we ofc report with warning.
+
+    '''
+    actor = actor or _state.current_actor()
+
+    # XXX running outside actor-runtime usage,
+    # - unit testing
+    # - possibly manual usage (eventually) ?
+    if not actor:
+        return None
+
+    local_nursery: (
+        ActorNursery|None
+    ) = actor._actoruid2nursery.get(uid)
+
+    # This is set in `Portal.cancel_actor()`. So if
+    # the peer was cancelled we try to wait for them
+    # to tear down their side of the connection before
+    # moving on with closing our own side.
+    if (
+        local_nursery
+        and (
+            actor._cancel_called
+            or
+            chan._cancel_called
+        )
+        #
+        # ^-TODO-^ along with this is there another condition
+        # that we should filter with to avoid entering this
+        # waiting block needlessly?
+        # -[ ] maybe `and local_nursery.cancelled` and/or
+        #     only if the `._children` table is empty or has
+        #     only `Portal`s with .chan._cancel_called ==
+        #     True` as per what we had below; the MAIN DIFF
+        #     BEING that just bc one `Portal.cancel_actor()`
+        #     was called, doesn't mean the whole actor-nurse
+        #     is gonna exit any time soon right!?
+        #
+        # or
+        # all(chan._cancel_called for chan in chans)
+
+    ):
+        log.cancel(
+            'Waiting on cancel request to peer..\n'
+            f'c)=>\n'
+            f'  |_{chan.uid}\n'
+        )
+
+        # XXX: this is a soft wait on the channel (and its
+        # underlying transport protocol) to close from the
+        # remote peer side since we presume that any channel
+        # which is mapped to a sub-actor (i.e. it's managed
+        # by local actor-nursery) has a message that is sent
+        # to the peer likely by this actor (which may be in
+        # a shutdown sequence due to cancellation) when the
+        # local runtime here is now cancelled while
+        # (presumably) in the middle of msg loop processing.
+        chan_info: str = (
+            f'{chan.uid}\n'
+            f'|_{chan}\n'
+            f'  |_{chan.transport}\n\n'
+        )
+        with trio.move_on_after(chan_drain_timeout) as drain_cs:
+            drain_cs.shield = True
+
+            # attempt to wait for the far end to close the
+            # channel and bail after timeout (a 2-generals
+            # problem on closure).
+            assert chan.transport
+            async for msg in chan.transport.drain():
+
+                # try to deliver any lingering msgs
+                # before we destroy the channel.
+                # This accomplishes deterministic
+                # ``Portal.cancel_actor()`` cancellation by
+                # making sure any RPC response to that call is
+                # delivered the local calling task.
+                # TODO: factor this into a helper?
+                log.warning(
+                    'Draining msg from disconnected peer\n'
+                    f'{chan_info}'
+                    f'{pformat(msg)}\n'
+                )
+                # cid: str|None = msg.get('cid')
+                cid: str|None = msg.cid
+                if cid:
+                    # deliver response to local caller/waiter
+                    await actor._deliver_ctx_payload(
+                        chan,
+                        cid,
+                        msg,
+                    )
+        if drain_cs.cancelled_caught:
+            log.warning(
+                'Timed out waiting on IPC transport channel to drain?\n'
+                f'{chan_info}'
+            )
+
+        # XXX NOTE XXX when no explicit call to
+        # `open_root_actor()` was made by the application
+        # (normally we implicitly make that call inside
+        # the first `.open_nursery()` in root-actor
+        # user/app code), we can assume that either we
+        # are NOT the root actor or are root but the
+        # runtime was started manually. and thus DO have
+        # to wait for the nursery-enterer to exit before
+        # shutting down the local runtime to avoid
+        # clobbering any ongoing subactor
+        # teardown/debugging/graceful-cancel.
+        #
+        # see matching  note inside `._supervise.open_nursery()`
+        #
+        # TODO: should we have a separate cs + timeout
+        # block here?
+        if (
+            # XXX SO either,
+            #  - not root OR,
+            #  - is root but `open_root_actor()` was
+            #    entered manually (in which case we do
+            #    the equiv wait there using the
+            #    `devx.debug` sub-sys APIs).
+            not local_nursery._implicit_runtime_started
+        ):
+            log.runtime(
+                'Waiting on local actor nursery to exit..\n'
+                f'|_{local_nursery}\n'
+            )
+            with trio.move_on_after(an_exit_timeout) as an_exit_cs:
+                an_exit_cs.shield = True
+                await local_nursery.exited.wait()
+
+            # TODO: currently this is always triggering for every
+            # sub-daemon spawned from the `piker.services._mngr`?
+            # -[ ] how do we ensure that the IPC is supposed to
+            #      be long lived and isn't just a register?
+            # |_ in the register case how can we signal that the
+            #    ephemeral msg loop was intentional?
+            if (
+                # not local_nursery._implicit_runtime_started
+                # and
+                an_exit_cs.cancelled_caught
+            ):
+                report: str = (
+                    'Timed out waiting on local actor-nursery to exit?\n'
+                    f'c)>\n'
+                    f' |_{local_nursery}\n'
+                )
+                if children := local_nursery._children:
+                    # indent from above local-nurse repr
+                    report += (
+                        f'   |_{pformat(children)}\n'
+                    )
+
+                log.warning(report)
+
+        if disconnected:
+            # if the transport died and this actor is still
+            # registered within a local nursery, we report
+            # that the IPC layer may have failed
+            # unexpectedly since it may be the cause of
+            # other downstream errors.
+            entry: tuple|None = local_nursery._children.get(uid)
+            if entry:
+                proc: trio.Process
+                _, proc, _ = entry
+
+                if (
+                    (poll := getattr(proc, 'poll', None))
+                    and
+                    poll() is None  # proc still alive
+                ):
+                    # TODO: change log level based on
+                    # detecting whether chan was created for
+                    # ephemeral `.register_actor()` request!
+                    # -[ ] also, that should be avoidable by
+                    #   re-using any existing chan from the
+                    #   `._discovery.get_registry()` call as
+                    #   well..
+                    log.runtime(
+                        f'Peer IPC broke but subproc is alive?\n\n'
+
+                        f'<=x {chan.uid}@{chan.raddr}\n'
+                        f'   |_{proc}\n'
+                    )
+
+    return local_nursery
+
 # TODO multi-tpt support with per-proto peer tracking?
 #
 # -[x] maybe change to mod-func and rename for implied
 #    multi-transport semantics?
-#
 # -[ ] register each stream/tpt/chan with the owning `IPCEndpoint`
 #     so that we can query per tpt all peer contact infos?
 #  |_[ ] possibly provide a global viewing via a
@@ -87,7 +299,6 @@ async def handle_stream_from_peer(
 
     *,
     server: IPCServer,
-    actor: Actor,
 
 ) -> None:
     '''
@@ -119,9 +330,10 @@ async def handle_stream_from_peer(
 
     # initial handshake with peer phase
     try:
-        peer_aid: msgtypes.Aid = await chan._do_handshake(
-            aid=actor.aid,
-        )
+        if actor := _state.current_actor():
+            peer_aid: msgtypes.Aid = await chan._do_handshake(
+                aid=actor.aid,
+            )
     except (
         TransportClosed,
         # ^XXX NOTE, the above wraps `trio` exc types raised
@@ -222,8 +434,7 @@ async def handle_stream_from_peer(
             disconnected,
             last_msg,
         ) = await _rpc.process_messages(
-            actor,
-            chan,
+            chan=chan,
         )
     except trio.Cancelled:
         log.cancel(
@@ -234,179 +445,16 @@ async def handle_stream_from_peer(
         raise
 
     finally:
-        local_nursery: (
-            ActorNursery|None
-        ) = actor._actoruid2nursery.get(uid)
 
-        # This is set in ``Portal.cancel_actor()``. So if
-        # the peer was cancelled we try to wait for them
-        # to tear down their side of the connection before
-        # moving on with closing our own side.
-        if (
-            local_nursery
-            and (
-                actor._cancel_called
-                or
-                chan._cancel_called
-            )
-            #
-            # ^-TODO-^ along with this is there another condition
-            # that we should filter with to avoid entering this
-            # waiting block needlessly?
-            # -[ ] maybe `and local_nursery.cancelled` and/or
-            #     only if the `._children` table is empty or has
-            #     only `Portal`s with .chan._cancel_called ==
-            #     True` as per what we had below; the MAIN DIFF
-            #     BEING that just bc one `Portal.cancel_actor()`
-            #     was called, doesn't mean the whole actor-nurse
-            #     is gonna exit any time soon right!?
-            #
-            # or
-            # all(chan._cancel_called for chan in chans)
-
-        ):
-            log.cancel(
-                'Waiting on cancel request to peer..\n'
-                f'c)=>\n'
-                f'  |_{chan.uid}\n'
-            )
-
-            # XXX: this is a soft wait on the channel (and its
-            # underlying transport protocol) to close from the
-            # remote peer side since we presume that any channel
-            # which is mapped to a sub-actor (i.e. it's managed
-            # by local actor-nursery) has a message that is sent
-            # to the peer likely by this actor (which may be in
-            # a shutdown sequence due to cancellation) when the
-            # local runtime here is now cancelled while
-            # (presumably) in the middle of msg loop processing.
-            chan_info: str = (
-                f'{chan.uid}\n'
-                f'|_{chan}\n'
-                f'  |_{chan.transport}\n\n'
-            )
-            with trio.move_on_after(0.5) as drain_cs:
-                drain_cs.shield = True
-
-                # attempt to wait for the far end to close the
-                # channel and bail after timeout (a 2-generals
-                # problem on closure).
-                assert chan.transport
-                async for msg in chan.transport.drain():
-
-                    # try to deliver any lingering msgs
-                    # before we destroy the channel.
-                    # This accomplishes deterministic
-                    # ``Portal.cancel_actor()`` cancellation by
-                    # making sure any RPC response to that call is
-                    # delivered the local calling task.
-                    # TODO: factor this into a helper?
-                    log.warning(
-                        'Draining msg from disconnected peer\n'
-                        f'{chan_info}'
-                        f'{pformat(msg)}\n'
-                    )
-                    # cid: str|None = msg.get('cid')
-                    cid: str|None = msg.cid
-                    if cid:
-                        # deliver response to local caller/waiter
-                        await actor._deliver_ctx_payload(
-                            chan,
-                            cid,
-                            msg,
-                        )
-            if drain_cs.cancelled_caught:
-                log.warning(
-                    'Timed out waiting on IPC transport channel to drain?\n'
-                    f'{chan_info}'
-                )
-
-            # XXX NOTE XXX when no explicit call to
-            # `open_root_actor()` was made by the application
-            # (normally we implicitly make that call inside
-            # the first `.open_nursery()` in root-actor
-            # user/app code), we can assume that either we
-            # are NOT the root actor or are root but the
-            # runtime was started manually. and thus DO have
-            # to wait for the nursery-enterer to exit before
-            # shutting down the local runtime to avoid
-            # clobbering any ongoing subactor
-            # teardown/debugging/graceful-cancel.
-            #
-            # see matching  note inside `._supervise.open_nursery()`
-            #
-            # TODO: should we have a separate cs + timeout
-            # block here?
-            if (
-                # XXX SO either,
-                #  - not root OR,
-                #  - is root but `open_root_actor()` was
-                #    entered manually (in which case we do
-                #    the equiv wait there using the
-                #    `devx._debug` sub-sys APIs).
-                not local_nursery._implicit_runtime_started
-            ):
-                log.runtime(
-                    'Waiting on local actor nursery to exit..\n'
-                    f'|_{local_nursery}\n'
-                )
-                with trio.move_on_after(0.5) as an_exit_cs:
-                    an_exit_cs.shield = True
-                    await local_nursery.exited.wait()
-
-                # TODO: currently this is always triggering for every
-                # sub-daemon spawned from the `piker.services._mngr`?
-                # -[ ] how do we ensure that the IPC is supposed to
-                #      be long lived and isn't just a register?
-                # |_ in the register case how can we signal that the
-                #    ephemeral msg loop was intentional?
-                if (
-                    # not local_nursery._implicit_runtime_started
-                    # and
-                    an_exit_cs.cancelled_caught
-                ):
-                    report: str = (
-                        'Timed out waiting on local actor-nursery to exit?\n'
-                        f'c)>\n'
-                        f' |_{local_nursery}\n'
-                    )
-                    if children := local_nursery._children:
-                        # indent from above local-nurse repr
-                        report += (
-                            f'   |_{pformat(children)}\n'
-                        )
-
-                    log.warning(report)
-
-            if disconnected:
-                # if the transport died and this actor is still
-                # registered within a local nursery, we report
-                # that the IPC layer may have failed
-                # unexpectedly since it may be the cause of
-                # other downstream errors.
-                entry: tuple|None = local_nursery._children.get(uid)
-                if entry:
-                    proc: trio.Process
-                    _, proc, _ = entry
-
-                    if (
-                        (poll := getattr(proc, 'poll', None))
-                        and
-                        poll() is None  # proc still alive
-                    ):
-                        # TODO: change log level based on
-                        # detecting whether chan was created for
-                        # ephemeral `.register_actor()` request!
-                        # -[ ] also, that should be avoidable by
-                        #   re-using any existing chan from the
-                        #   `._discovery.get_registry()` call as
-                        #   well..
-                        log.runtime(
-                            f'Peer IPC broke but subproc is alive?\n\n'
-
-                            f'<=x {chan.uid}@{chan.raddr}\n'
-                            f'   |_{proc}\n'
-                        )
+        # check if there are subs which we should gracefully join at
+        # both the inter-actor-task and subprocess levels to
+        # gracefully remote cancel and later disconnect (particularly
+        # for permitting subs engaged in active debug-REPL sessions).
+        local_nursery: ActorNursery|None = await maybe_wait_on_canced_subs(
+            uid=uid,
+            chan=chan,
+            disconnected=disconnected,
+        )
 
         # ``Channel`` teardown and closure sequence
         # drop ref to channel so it can be gc-ed and disconnected
@@ -467,11 +515,11 @@ async def handle_stream_from_peer(
                 # from broken debug TTY locking due to
                 # msg-spec races on application using RunVar...
                 if (
+                    local_nursery
+                    and
                     (ctx_in_debug := pdb_lock.ctx_in_debug)
                     and
                     (pdb_user_uid := ctx_in_debug.chan.uid)
-                    and
-                    local_nursery
                 ):
                     entry: tuple|None = local_nursery._children.get(
                         tuple(pdb_user_uid)
@@ -804,7 +852,6 @@ class IPCServer(Struct):
     async def listen_on(
         self,
         *,
-        actor: Actor,
         accept_addrs: list[tuple[str, int|str]]|None = None,
         stream_handler_nursery: Nursery|None = None,
     ) -> list[IPCEndpoint]:
@@ -837,20 +884,19 @@ class IPCServer(Struct):
                 f'{self}\n'
             )
 
-        log.info(
+        log.runtime(
             f'Binding to endpoints for,\n'
             f'{accept_addrs}\n'
         )
         eps: list[IPCEndpoint] = await self._parent_tn.start(
             partial(
                 _serve_ipc_eps,
-                actor=actor,
                 server=self,
                 stream_handler_tn=stream_handler_nursery,
                 listen_addrs=accept_addrs,
             )
         )
-        log.info(
+        log.runtime(
             f'Started IPC endpoints\n'
             f'{eps}\n'
         )
@@ -873,7 +919,6 @@ class IPCServer(Struct):
 
 async def _serve_ipc_eps(
     *,
-    actor: Actor,
     server: IPCServer,
     stream_handler_tn: Nursery,
     listen_addrs: list[tuple[str, int|str]],
@@ -907,12 +952,13 @@ async def _serve_ipc_eps(
                     stream_handler_tn=stream_handler_tn,
                 )
                 try:
-                    log.info(
+                    log.runtime(
                         f'Starting new endpoint listener\n'
                         f'{ep}\n'
                     )
                     listener: trio.abc.Listener = await ep.start_listener()
                     assert listener is ep._listener
+                    # actor = _state.current_actor()
                     # if actor.is_registry:
                     #     import pdbp; pdbp.set_trace()
 
@@ -937,7 +983,6 @@ async def _serve_ipc_eps(
                     handler=partial(
                         handle_stream_from_peer,
                         server=server,
-                        actor=actor,
                     ),
                     listeners=listeners,
 
@@ -948,13 +993,13 @@ async def _serve_ipc_eps(
                 )
             )
             # TODO, wow make this message better! XD
-            log.info(
+            log.runtime(
                 'Started server(s)\n'
                 +
                 '\n'.join([f'|_{addr}' for addr in listen_addrs])
             )
 
-            log.info(
+            log.runtime(
                 f'Started IPC endpoints\n'
                 f'{eps}\n'
             )
@@ -970,6 +1015,7 @@ async def _serve_ipc_eps(
                 ep.close_listener()
                 server._endpoints.remove(ep)
 
+        # actor = _state.current_actor()
         # if actor.is_arbiter:
         #     import pdbp; pdbp.set_trace()
 
@@ -980,7 +1026,6 @@ async def _serve_ipc_eps(
 
 @acm
 async def open_ipc_server(
-    actor: Actor,
     parent_tn: Nursery|None = None,
     stream_handler_tn: Nursery|None = None,
 

tractor/ipc/_tcp.py

@@ -127,6 +127,11 @@ async def start_listener(
     Start a TCP socket listener on the given `TCPAddress`.
 
     '''
+    log.info(
+        f'Attempting to bind TCP socket\n'
+        f'>[\n'
+        f'|_{addr}\n'
+    )
     # ?TODO, maybe we should just change the lower-level call this is
     # using internall per-listener?
     listeners: list[SocketListener] = await open_tcp_listeners(
@@ -140,6 +145,12 @@ async def start_listener(
     assert len(listeners) == 1
     listener = listeners[0]
     host, port = listener.socket.getsockname()[:2]
+
+    log.info(
+        f'Listening on TCP socket\n'
+        f'[>\n'
+        f' |_{addr}\n'
+    )
     return listener
 
 

tractor/log.py

@@ -270,7 +270,9 @@ def get_logger(
     subsys_spec: str|None = None,
 
 ) -> StackLevelAdapter:
-    '''Return the package log or a sub-logger for ``name`` if provided.
+    '''
+    Return the `tractor`-library root logger or a sub-logger for
+    `name` if provided.
 
     '''
     log: Logger
@@ -282,7 +284,7 @@ def get_logger(
         name != _proj_name
     ):
 
-        # NOTE: for handling for modules that use ``get_logger(__name__)``
+        # NOTE: for handling for modules that use `get_logger(__name__)`
         # we make the following stylistic choice:
         # - always avoid duplicate project-package token
         #   in msg output: i.e. tractor.tractor.ipc._chan.py in header
@@ -331,7 +333,7 @@ def get_logger(
 
 def get_console_log(
     level: str|None = None,
-    logger: Logger|None = None,
+    logger: Logger|StackLevelAdapter|None = None,
     **kwargs,
 
 ) -> LoggerAdapter:
@@ -344,12 +346,23 @@ def get_console_log(
     Yeah yeah, i know we can use `logging.config.dictConfig()`. You do it.
 
     '''
-    log = get_logger(
-        logger=logger,
-        **kwargs
-    )  # set a root logger
-    logger: Logger = log.logger
+    # get/create a stack-aware-adapter
+    if (
+        logger
+        and
+        isinstance(logger, StackLevelAdapter)
+    ):
+        # XXX, for ex. when passed in by a caller wrapping some
+        # other lib's logger instance with our level-adapter.
+        log = logger
 
+    else:
+        log: StackLevelAdapter = get_logger(
+            logger=logger,
+            **kwargs
+        )
+
+    logger: Logger|StackLevelAdapter = log.logger
     if not level:
         return log
 
@@ -367,10 +380,7 @@ def get_console_log(
             None,
         )
     ):
-        fmt = LOG_FORMAT
-        # if logger:
-        #     fmt = None
-
+        fmt: str = LOG_FORMAT  # always apply our format?
         handler = StreamHandler()
         formatter = colorlog.ColoredFormatter(
             fmt=fmt,

tractor/trionics/__init__.py

@@ -31,4 +31,5 @@ from ._broadcast import (
 )
 from ._beg import (
     collapse_eg as collapse_eg,
+    maybe_collapse_eg as maybe_collapse_eg,
 )