pdbp: adding typing to config settings vars

docs/README.rst

@@ -6,14 +6,8 @@
 ``tractor`` is a `structured concurrent`_, multi-processing_ runtime
 built on trio_.
 
-Fundamentally, ``tractor`` gives you parallelism via
+Fundamentally ``tractor`` gives you parallelism via ``trio``-"*actors*":
-``trio``-"*actors*": independent Python processes (aka
+our nurseries_ let you spawn new Python processes which each run a ``trio``
-non-shared-memory threads) which maintain structured
-concurrency (SC) *end-to-end* inside a *supervision tree*.
-
-Cross-process (and thus cross-host) SC is accomplished through the
-combined use of our "actor nurseries_" and an "SC-transitive IPC
-protocol" constructed on top of multiple Pythons each running a ``trio``
 scheduled runtime - a call to ``trio.run()``.
 
 We believe the system adheres to the `3 axioms`_ of an "`actor model`_"
@@ -29,8 +23,7 @@ Features
 - **It's just** a ``trio`` API
 - *Infinitely nesteable* process trees
 - Builtin IPC streaming APIs with task fan-out broadcasting
-- A "native" multi-core debugger REPL using `pdbp`_ (a fork & fix of
+- A (first ever?) "native" multi-core debugger UX for Python using `pdb++`_
-  `pdb++`_ thanks to @mdmintz!)
 - Support for a swappable, OS specific, process spawning layer
 - A modular transport stack, allowing for custom serialization (eg. with
   `msgspec`_), communications protocols, and environment specific IPC
@@ -156,7 +149,7 @@ it **is a bug**.
 
 "Native" multi-process debugging
 --------------------------------
-Using the magic of `pdbp`_ and our internal IPC, we've
+Using the magic of `pdb++`_ and our internal IPC, we've
 been able to create a native feeling debugging experience for
 any (sub-)process in your ``tractor`` tree.
 
@@ -604,7 +597,6 @@ channel`_!
 .. _adherance to: https://www.youtube.com/watch?v=7erJ1DV_Tlo&t=1821s
 .. _trio gitter channel: https://gitter.im/python-trio/general
 .. _matrix channel: https://matrix.to/#/!tractor:matrix.org
-.. _pdbp: https://github.com/mdmintz/pdbp
 .. _pdb++: https://github.com/pdbpp/pdbpp
 .. _guest mode: https://trio.readthedocs.io/en/stable/reference-lowlevel.html?highlight=guest%20mode#using-guest-mode-to-run-trio-on-top-of-other-event-loops
 .. _messages: https://en.wikipedia.org/wiki/Message_passing

examples/debugging/restore_builtin_breakpoint.py

@@ -1,24 +0,0 @@
-import os
-import sys
-
-import trio
-import tractor
-
-
-async def main() -> None:
-    async with tractor.open_nursery(debug_mode=True) as an:
-
-        assert os.environ['PYTHONBREAKPOINT'] == 'tractor._debug._set_trace'
-
-        # TODO: an assert that verifies the hook has indeed been, hooked
-        # XD
-        assert sys.breakpointhook is not tractor._debug._set_trace
-
-        breakpoint()
-
-    # TODO: an assert that verifies the hook is unhooked..
-    assert sys.breakpointhook
-    breakpoint()
-
-if __name__ == '__main__':
-    trio.run(main)

nooz/356.trivial.rst

@@ -1,7 +0,0 @@
-Drop `trio.Process.aclose()` usage, copy into our spawning code.
-
-The details are laid out in https://github.com/goodboy/tractor/issues/330.
-`trio` changed is process running quite some time ago, this just copies
-out the small bit we needed (from the old `.aclose()`) for hard kills
-where a soft runtime cancel request fails and our "zombie killer"
-implementation kicks in.

nooz/358.feature.rst

@@ -1,15 +0,0 @@
-Switch to using the fork & fix of `pdb++`, `pdbp`:
-https://github.com/mdmintz/pdbp
-
-Allows us to sidestep a variety of issues that aren't being maintained
-in the upstream project thanks to the hard work of @mdmintz!
-
-We also include some default settings adjustments as per recent
-development on the fork:
-
-- sticky mode is still turned on by default but now activates when
-  a using the `ll` repl command.
-- turn off line truncation by default to avoid inter-line gaps when
-  resizing the terimnal during use.
-- when using the backtrace cmd either by `w` or `bt`, the config
-  automatically switches to non-sticky mode.

requirements-test.txt

@@ -1,7 +1,7 @@
 pytest
 pytest-trio
 pytest-timeout
-pdbp
+pdbpp
 mypy
 trio_typing
 pexpect

tests/test_debugger.py

@@ -151,6 +151,19 @@ def ctlc(
 
     use_ctlc = request.param
 
+    # TODO: we can remove this bc pdbp right?
+    if (
+        sys.version_info <= (3, 10)
+        and use_ctlc
+    ):
+        # on 3.9 it seems the REPL UX
+        # is highly unreliable and frankly annoying
+        # to test for. It does work from manual testing
+        # but i just don't think it's wroth it to try
+        # and get this working especially since we want to
+        # be 3.10+ mega-asap.
+        pytest.skip('Py3.9 and `pdbpp` son no bueno..')
+
     node = request.node
     markers = node.own_markers
     for mark in markers:
@@ -181,15 +194,13 @@ def ctlc(
     ids=lambda item: f'{item[0]} -> {item[1]}',
 )
 def test_root_actor_error(spawn, user_in_out):
-    '''
+    """Demonstrate crash handler entering pdbpp from basic error in root actor.
-    Demonstrate crash handler entering pdb from basic error in root actor.
+    """
-
-    '''
     user_input, expect_err_str = user_in_out
 
     child = spawn('root_actor_error')
 
-    # scan for the prompt
+    # scan for the pdbpp prompt
     expect(child, PROMPT)
 
     before = str(child.before.decode())
@@ -220,7 +231,7 @@ def test_root_actor_bp(spawn, user_in_out):
     user_input, expect_err_str = user_in_out
     child = spawn('root_actor_breakpoint')
 
-    # scan for the prompt
+    # scan for the pdbpp prompt
     child.expect(PROMPT)
 
     assert 'Error' not in str(child.before)
@@ -328,7 +339,7 @@ def test_subactor_error(
     '''
     child = spawn('subactor_error')
 
-    # scan for the prompt
+    # scan for the pdbpp prompt
     child.expect(PROMPT)
 
     before = str(child.before.decode())
@@ -376,7 +387,7 @@ def test_subactor_breakpoint(
 
     child = spawn('subactor_breakpoint')
 
-    # scan for the prompt
+    # scan for the pdbpp prompt
     child.expect(PROMPT)
 
     before = str(child.before.decode())
@@ -437,7 +448,7 @@ def test_multi_subactors(
     '''
     child = spawn(r'multi_subactors')
 
-    # scan for the prompt
+    # scan for the pdbpp prompt
     child.expect(PROMPT)
 
     before = str(child.before.decode())
@@ -677,7 +688,7 @@ def test_multi_subactors_root_errors(
     '''
     child = spawn('multi_subactor_root_errors')
 
-    # scan for the prompt
+    # scan for the pdbpp prompt
     child.expect(PROMPT)
 
     # at most one subactor should attach before the root is cancelled

tractor/_debug.py

@@ -54,6 +54,18 @@ from ._exceptions import (
 )
 from ._ipc import Channel
 
+
+# TODO: we can drop this now yah?
+# try:
+#     # wtf: only exported when installed in dev mode?
+#     import pdbp
+# except ImportError:
+#     # pdbpp is installed in regular mode...it monkey patches stuff
+#     import pdb
+#     xpm = getattr(pdb, 'xpm', None)
+#     assert xpm, "pdbpp is not installed?"  # type: ignore
+#     pdbpp = pdb
+
 log = get_logger(__name__)
 
 
@@ -742,8 +754,8 @@ def shield_sigint_handler(
 
 
 def _set_trace(
-    actor: tractor.Actor | None = None,
+    actor: Optional[tractor.Actor] = None,
-    pdb: MultiActorPdb | None = None,
+    pdb: Optional[MultiActorPdb] = None,
 ):
     __tracebackhide__ = True
     actor = actor or tractor.current_actor()
@@ -753,11 +765,7 @@ def _set_trace(
     if frame:
         frame = frame.f_back  # type: ignore
 
-    if (
+    if frame and pdb and actor is not None:
-        frame
-        and pdb
-        and actor is not None
-    ):
         log.pdb(f"\nAttaching pdb to actor: {actor.uid}\n")
         # no f!#$&* idea, but when we're in async land
         # we need 2x frames up?
@@ -766,8 +774,7 @@ def _set_trace(
     else:
         pdb, undo_sigint = mk_mpdb()
 
-        # we entered the global ``breakpoint()`` built-in from sync
+        # we entered the global ``breakpoint()`` built-in from sync code?
-        # code?
         Lock.local_task_in_debug = 'sync'
 
     pdb.set_trace(frame=frame)

tractor/_root.py

@@ -22,9 +22,8 @@ from contextlib import asynccontextmanager
 from functools import partial
 import importlib
 import logging
-import signal
-import sys
 import os
+import signal
 import typing
 import warnings
 
@@ -85,10 +84,8 @@ async def open_root_actor(
 
     '''
     # Override the global debugger hook to make it play nice with
-    # ``trio``, see much discussion in:
+    # ``trio``, see:
     # https://github.com/python-trio/trio/issues/1155#issuecomment-742964018
-    builtin_bp_handler = sys.breakpointhook
-    orig_bp_path: str | None = os.environ.get('PYTHONBREAKPOINT', None)
     os.environ['PYTHONBREAKPOINT'] = 'tractor._debug._set_trace'
 
     # attempt to retreive ``trio``'s sigint handler and stash it
@@ -257,15 +254,6 @@ async def open_root_actor(
                 await actor.cancel()
     finally:
         _state._current_actor = None
-
-        # restore breakpoint hook state
-        sys.breakpointhook = builtin_bp_handler
-        if orig_bp_path is not None:
-            os.environ['PYTHONBREAKPOINT'] = orig_bp_path
-        else:
-            # clear env back to having no entry
-            os.environ.pop('PYTHONBREAKPOINT')
-
         logger.runtime("Root actor terminated")
 
 
@@ -301,7 +289,7 @@ def run_daemon(
     async def _main():
 
         async with open_root_actor(
-            registry_addr=registry_addr,
+            arbiter_addr=registry_addr,
             name=name,
             start_method=start_method,
             debug_mode=debug_mode,

tractor/_spawn.py

@@ -23,12 +23,13 @@ import sys
 import platform
 from typing import (
     Any,
-    Awaitable,
     Literal,
+    Optional,
     Callable,
     TypeVar,
     TYPE_CHECKING,
 )
+from collections.abc import Awaitable
 
 from exceptiongroup import BaseExceptionGroup
 import trio
@@ -59,7 +60,7 @@ if TYPE_CHECKING:
 log = get_logger('tractor')
 
 # placeholder for an mp start context if so using that backend
-_ctx: mp.context.BaseContext | None = None
+_ctx: Optional[mp.context.BaseContext] = None
 SpawnMethodKey = Literal[
     'trio',  # supported on all platforms
     'mp_spawn',
@@ -85,7 +86,7 @@ else:
 def try_set_start_method(
     key: SpawnMethodKey
 
-) -> mp.context.BaseContext | None:
+) -> Optional[mp.context.BaseContext]:
     '''
     Attempt to set the method for process starting, aka the "actor
     spawning backend".
@@ -199,37 +200,16 @@ async def cancel_on_completion(
 async def do_hard_kill(
     proc: trio.Process,
     terminate_after: int = 3,
-
 ) -> None:
     # NOTE: this timeout used to do nothing since we were shielding
     # the ``.wait()`` inside ``new_proc()`` which will pretty much
     # never release until the process exits, now it acts as
     # a hard-kill time ultimatum.
-    log.debug(f"Terminating {proc}")
     with trio.move_on_after(terminate_after) as cs:
 
-        # NOTE: code below was copied verbatim from the now deprecated
+        # NOTE: This ``__aexit__()`` shields internally.
-        # (in 0.20.0) ``trio._subrocess.Process.aclose()``, orig doc
+        async with proc:  # calls ``trio.Process.aclose()``
-        # string:
+            log.debug(f"Terminating {proc}")
-        #
-        # Close any pipes we have to the process (both input and output)
-        # and wait for it to exit. If cancelled, kills the process and
-        # waits for it to finish exiting before propagating the
-        # cancellation.
-        with trio.CancelScope(shield=True):
-            if proc.stdin is not None:
-                await proc.stdin.aclose()
-            if proc.stdout is not None:
-                await proc.stdout.aclose()
-            if proc.stderr is not None:
-                await proc.stderr.aclose()
-        try:
-            await proc.wait()
-        finally:
-            if proc.returncode is None:
-                proc.kill()
-                with trio.CancelScope(shield=True):
-                    await proc.wait()
 
     if cs.cancelled_caught:
         # XXX: should pretty much never get here unless we have
@@ -375,11 +355,12 @@ async def trio_proc(
         spawn_cmd.append("--asyncio")
 
     cancelled_during_spawn: bool = False
-    proc: trio.Process | None = None
+    proc: Optional[trio.Process] = None
     try:
         try:
             # TODO: needs ``trio_typing`` patch?
-            proc = await trio.lowlevel.open_process(spawn_cmd)
+            proc = await trio.lowlevel.open_process(    # type: ignore
+                spawn_cmd)
 
             log.runtime(f"Started {proc}")
 
@@ -463,8 +444,8 @@ async def trio_proc(
             nursery.cancel_scope.cancel()
 
     finally:
-        # XXX NOTE XXX: The "hard" reap since no actor zombies are
+        # The "hard" reap since no actor zombies are allowed!
-        # allowed! Do this **after** cancellation/teardown to avoid
+        # XXX: do this **after** cancellation/tearfown to avoid
         # killing the process too early.
         if proc:
             log.cancel(f'Hard reap sequence starting for {subactor.uid}')