🔧 Update async_eval version

Author: uriyyo

helpers/poetry.lock

@@ -67,6 +67,212 @@ except NameError:
 }.memoize()
 
 val PYDEVD_ASYNC_PLUGIN = """
+import asyncio
+import asyncio.events as events
+import os
+import sys
+import threading
+from contextlib import contextmanager
+from heapq import heappop
+
+
+def apply(loop=None):
+    '''Patch asyncio to make its event loop reentrant.'''
+    loop = loop or asyncio.get_event_loop()
+    if not isinstance(loop, asyncio.BaseEventLoop):
+        raise ValueError('Can\'t patch loop of type %s' % type(loop))
+    if getattr(loop, '_nest_patched', None):
+        # already patched
+        return
+    _patch_asyncio()
+    _patch_loop(loop)
+    _patch_task()
+    _patch_tornado()
+
+
+def _patch_asyncio():
+    '''
+    Patch asyncio module to use pure Python tasks and futures,
+    use module level _current_tasks, all_tasks and patch run method.
+    '''
+    def run(future, *, debug=False):
+        loop = asyncio.get_event_loop()
+        loop.set_debug(debug)
+        return loop.run_until_complete(future)
+
+    if sys.version_info >= (3, 6, 0):
+        asyncio.Task = asyncio.tasks._CTask = asyncio.tasks.Task = \
+            asyncio.tasks._PyTask
+        asyncio.Future = asyncio.futures._CFuture = asyncio.futures.Future = \
+            asyncio.futures._PyFuture
+    if sys.version_info < (3, 7, 0):
+        asyncio.tasks._current_tasks = asyncio.tasks.Task._current_tasks  # noqa
+        asyncio.all_tasks = asyncio.tasks.Task.all_tasks  # noqa
+    if not hasattr(asyncio, '_run_orig'):
+        asyncio._run_orig = getattr(asyncio, 'run', None)
+        asyncio.run = run
+
+
+def _patch_loop(loop):
+    '''Patch loop to make it reentrant.'''
+
+    def run_forever(self):
+        with manage_run(self), manage_asyncgens(self):
+            while True:
+                self._run_once()
+                if self._stopping:
+                    break
+        self._stopping = False
+
+    def run_until_complete(self, future):
+        with manage_run(self):
+            f = asyncio.ensure_future(future, loop=self)
+            if f is not future:
+                f._log_destroy_pending = False
+            while not f.done():
+                self._run_once()
+                if self._stopping:
+                    break
+            if not f.done():
+                raise RuntimeError(
+                    'Event loop stopped before Future completed.')
+            return f.result()
+
+    def _run_once(self):
+        '''
+        Simplified re-implementation of asyncio's _run_once that
+        runs handles as they become ready.
+        '''
+        now = self.time()
+        ready = self._ready
+        scheduled = self._scheduled
+        while scheduled and scheduled[0]._cancelled:
+            heappop(scheduled)
+
+        timeout = (
+            0 if ready or self._stopping
+            else min(max(scheduled[0]._when - now, 0), 86400) if scheduled
+            else None)
+        event_list = self._selector.select(timeout)
+        self._process_events(event_list)
+
+        end_time = self.time() + self._clock_resolution
+        while scheduled and scheduled[0]._when < end_time:
+            handle = heappop(scheduled)
+            ready.append(handle)
+
+        for _ in range(len(ready)):
+            if not ready:
+                break
+            handle = ready.popleft()
+            if not handle._cancelled:
+                handle._run()
+        handle = None
+
+    @contextmanager
+    def manage_run(self):
+        '''Set up the loop for running.'''
+        self._check_closed()
+        old_thread_id = self._thread_id
+        old_running_loop = events._get_running_loop()
+        try:
+            self._thread_id = threading.get_ident()
+            events._set_running_loop(self)
+            self._num_runs_pending += 1
+            if self._is_proactorloop:
+                if self._self_reading_future is None:
+                    self.call_soon(self._loop_self_reading)
+            yield
+        finally:
+            self._thread_id = old_thread_id
+            events._set_running_loop(old_running_loop)
+            self._num_runs_pending -= 1
+            if self._is_proactorloop:
+                if (self._num_runs_pending == 0
+                        and self._self_reading_future is not None):
+                    ov = self._self_reading_future._ov
+                    self._self_reading_future.cancel()
+                    if ov is not None:
+                        self._proactor._unregister(ov)
+                    self._self_reading_future = None
+
+    @contextmanager
+    def manage_asyncgens(self):
+        old_agen_hooks = sys.get_asyncgen_hooks()
+        try:
+            self._set_coroutine_origin_tracking(self._debug)
+            if self._asyncgens is not None:
+                sys.set_asyncgen_hooks(
+                    firstiter=self._asyncgen_firstiter_hook,
+                    finalizer=self._asyncgen_finalizer_hook)
+            yield
+        finally:
+            self._set_coroutine_origin_tracking(False)
+            if self._asyncgens is not None:
+                sys.set_asyncgen_hooks(*old_agen_hooks)
+
+    def _check_running(self):
+        '''Do not throw exception if loop is already running.'''
+        pass
+
+    cls = loop.__class__
+    cls.run_forever = run_forever
+    cls.run_until_complete = run_until_complete
+    cls._run_once = _run_once
+    cls._check_running = _check_running
+    cls._check_runnung = _check_running  # typo in Python 3.7 source
+    cls._nest_patched = True
+    cls._num_runs_pending = 0
+    cls._is_proactorloop = (
+            os.name == 'nt' and issubclass(cls, asyncio.ProactorEventLoop))
+    if sys.version_info < (3, 7, 0):
+        cls._set_coroutine_origin_tracking = cls._set_coroutine_wrapper
+
+
+def _patch_task():
+    '''Patch the Task's step and enter/leave methods to make it reentrant.'''
+
+    def step(task, exc=None):
+        curr_task = curr_tasks.get(task._loop)
+        try:
+            step_orig(task, exc)
+        finally:
+            if curr_task is None:
+                curr_tasks.pop(task._loop, None)
+            else:
+                curr_tasks[task._loop] = curr_task
+
+    Task = asyncio.Task
+    if sys.version_info >= (3, 7, 0):
+
+        def enter_task(loop, task):
+            curr_tasks[loop] = task
+
+        def leave_task(loop, task):
+            curr_tasks.pop(loop, None)
+
+        asyncio.tasks._enter_task = enter_task
+        asyncio.tasks._leave_task = leave_task
+        curr_tasks = asyncio.tasks._current_tasks
+        step_orig = Task._Task__step
+        Task._Task__step = step
+    else:
+        curr_tasks = Task._current_tasks
+        step_orig = Task._step
+        Task._step = step
+
+
+def _patch_tornado():
+        '''
+        If tornado is imported before nest_asyncio, make tornado aware of
+        the pure-Python asyncio Future.
+        '''
+        if 'tornado' in sys.modules:
+            import tornado.concurrent as tc
+            tc.Future = asyncio.Future
+            if asyncio.Future not in tc.FUTURES:
+                tc.FUTURES += (asyncio.Future,)
+
 import asyncio
 import functools
 import sys