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add aio support #217

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add aio support #217

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e8b81df
✨ support aio
sagewe Mar 30, 2021
a99836d
✨ Introduce new features
sagewe Mar 31, 2021
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24 changes: 18 additions & 6 deletions mypy_protobuf/main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -149,14 +149,14 @@ def __init__(
self.from_imports: Dict[str, Set[Tuple[str, Optional[str]]]] = defaultdict(set)
self.locals: Set[str] = set()

def _import(self, path: str, name: str) -> str:
def _import(self, path: str, name: str, alias: Optional[str] = None) -> str:
"""Imports a stdlib path and returns a handle to it
eg. self._import("typing", "Optional") -> "Optional"
"""
imp = path.replace("/", ".")
if self.readable_stubs:
self.from_imports[imp].add((name, None))
return name
self.from_imports[imp].add((name, alias))
return alias or name
else:
self.imports.add(imp)
return imp + "." + name
Expand Down Expand Up @@ -656,7 +656,9 @@ def write_grpc_stub_methods(self, service: d.ServiceDescriptorProto) -> None:
l("{}] = ...", self._output_type(method, False))
l("")

def write_grpc_services(self, services: Iterable[d.ServiceDescriptorProto]) -> None:
def write_grpc_services(
self, services: Iterable[d.ServiceDescriptorProto], use_aio: bool
) -> None:
l = self._write_line
l(
"from .{} import *",
Expand All @@ -682,11 +684,19 @@ def write_grpc_services(self, services: Iterable[d.ServiceDescriptorProto]) -> N
with self._indent():
self.write_grpc_methods(service)
l("")
if use_aio:
server_type_hint = "{}[{}, {}]".format(
self._import("typing", "Union"),
self._import("grpc", "Server"),
self._import("grpc.aio", "Server", "AioServer"),
)
else:
server_type_hint = "{}".format(self._import("grpc", "Server"))
l(
"def add_{}Servicer_to_server(servicer: {}Servicer, server: {}) -> None: ...",
service.name,
service.name,
self._import("grpc", "Server"),
server_type_hint,
)
l("")

Expand Down Expand Up @@ -802,12 +812,13 @@ def generate_mypy_grpc_stubs(
quiet: bool,
readable_stubs: bool,
relax_strict_optional_primitives: bool,
use_aio: bool,
) -> None:
for name, fd in descriptors.to_generate.items():
pkg_writer = PkgWriter(
fd, descriptors, readable_stubs, relax_strict_optional_primitives
)
pkg_writer.write_grpc_services(fd.service)
pkg_writer.write_grpc_services(fd.service, use_aio)

assert name == fd.name
assert fd.name.endswith(".proto")
Expand Down Expand Up @@ -867,6 +878,7 @@ def grpc() -> None:
"quiet" in request.parameter,
"readable_stubs" in request.parameter,
"relax_strict_optional_primitives" in request.parameter,
"use_aio" in request.parameter,
)


Expand Down