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bpo-38242: Revert "bpo-36889: Merge asyncio streams (GH-13251)" (#16482)

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See https://bugs.python.org/issue38242 for more details
This commit is contained in:
Yury Selivanov 2019-09-29 21:59:55 -07:00 • committed by GitHub
parent 3667e1ee6c
commit 6758e6e12a
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13 changed files with 381 additions and 2755 deletions
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64
Lib/asyncio/subprocess.py
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@ -19,16 +19,14 @@ class SubprocessStreamProtocol(streams.FlowControlMixin,
protocols.SubprocessProtocol):
"""Like StreamReaderProtocol, but for a subprocess."""
def __init__(self, limit, loop, *, _asyncio_internal=False):
super().__init__(loop=loop, _asyncio_internal=_asyncio_internal)
def __init__(self, limit, loop):
super().__init__(loop=loop)
self._limit = limit
self.stdin = self.stdout = self.stderr = None
self._transport = None
self._process_exited = False
self._pipe_fds = []
self._stdin_closed = self._loop.create_future()
self._stdout_closed = self._loop.create_future()
self._stderr_closed = self._loop.create_future()
def __repr__(self):
info = [self.__class__.__name__]
@ -42,35 +40,27 @@ class SubprocessStreamProtocol(streams.FlowControlMixin,
def connection_made(self, transport):
self._transport = transport
stdout_transport = transport.get_pipe_transport(1)
if stdout_transport is not None:
self.stdout = streams.Stream(mode=streams.StreamMode.READ,
transport=stdout_transport,
protocol=self,
limit=self._limit,
loop=self._loop,
_asyncio_internal=True)
self.stdout._set_transport(stdout_transport)
self.stdout = streams.StreamReader(limit=self._limit,
loop=self._loop)
self.stdout.set_transport(stdout_transport)
self._pipe_fds.append(1)
stderr_transport = transport.get_pipe_transport(2)
if stderr_transport is not None:
self.stderr = streams.Stream(mode=streams.StreamMode.READ,
transport=stderr_transport,
protocol=self,
limit=self._limit,
loop=self._loop,
_asyncio_internal=True)
self.stderr._set_transport(stderr_transport)
self.stderr = streams.StreamReader(limit=self._limit,
loop=self._loop)
self.stderr.set_transport(stderr_transport)
self._pipe_fds.append(2)
stdin_transport = transport.get_pipe_transport(0)
if stdin_transport is not None:
self.stdin = streams.Stream(mode=streams.StreamMode.WRITE,
transport=stdin_transport,
protocol=self,
loop=self._loop,
_asyncio_internal=True)
self.stdin = streams.StreamWriter(stdin_transport,
protocol=self,
reader=None,
loop=self._loop)
def pipe_data_received(self, fd, data):
if fd == 1:
@ -80,7 +70,7 @@ class SubprocessStreamProtocol(streams.FlowControlMixin,
else:
reader = None
if reader is not None:
reader._feed_data(data)
reader.feed_data(data)
def pipe_connection_lost(self, fd, exc):
if fd == 0:
@ -101,9 +91,9 @@ class SubprocessStreamProtocol(streams.FlowControlMixin,
reader = None
if reader is not None:
if exc is None:
reader._feed_eof()
reader.feed_eof()
else:
reader._set_exception(exc)
reader.set_exception(exc)
if fd in self._pipe_fds:
self._pipe_fds.remove(fd)
@ -121,20 +111,10 @@ class SubprocessStreamProtocol(streams.FlowControlMixin,
def _get_close_waiter(self, stream):
if stream is self.stdin:
return self._stdin_closed
elif stream is self.stdout:
return self._stdout_closed
elif stream is self.stderr:
return self._stderr_closed
class Process:
def __init__(self, transport, protocol, loop, *, _asyncio_internal=False):
if not _asyncio_internal:
warnings.warn(f"{self.__class__} should be instantiated "
"by asyncio internals only, "
"please avoid its creation from user code",
DeprecationWarning)
def __init__(self, transport, protocol, loop):
self._transport = transport
self._protocol = protocol
self._loop = loop
@ -232,13 +212,12 @@ async def create_subprocess_shell(cmd, stdin=None, stdout=None, stderr=None,
)
protocol_factory = lambda: SubprocessStreamProtocol(limit=limit,
loop=loop,
_asyncio_internal=True)
loop=loop)
transport, protocol = await loop.subprocess_shell(
protocol_factory,
cmd, stdin=stdin, stdout=stdout,
stderr=stderr, **kwds)
return Process(transport, protocol, loop, _asyncio_internal=True)
return Process(transport, protocol, loop)
async def create_subprocess_exec(program, *args, stdin=None, stdout=None,
@ -253,11 +232,10 @@ async def create_subprocess_exec(program, *args, stdin=None, stdout=None,
stacklevel=2
)
protocol_factory = lambda: SubprocessStreamProtocol(limit=limit,
loop=loop,
_asyncio_internal=True)
loop=loop)
transport, protocol = await loop.subprocess_exec(
protocol_factory,
program, *args,
stdin=stdin, stdout=stdout,
stderr=stderr, **kwds)
return Process(transport, protocol, loop, _asyncio_internal=True)
return Process(transport, protocol, loop)