Create importlib path for protos

pull/21504/head
Richard Belleville 5 years ago
parent 709143d1f5
commit 595807e0c5
  1. 3
      tools/distrib/python/grpcio_tools/grpc_tools/main.cc
  2. 74
      tools/distrib/python/grpcio_tools/grpc_tools/protoc.py
  3. 48
      tools/distrib/python/grpcio_tools/grpc_tools/protoc_test.py

@ -130,7 +130,6 @@ static void calculate_transitive_closure(const ::google::protobuf::FileDescripto
transitive_closure->push_back(descriptor);
}
// TODO: Handle multiple include paths.
static int generate_code(::google::protobuf::compiler::CodeGenerator* code_generator,
char* protobuf_path,
const std::vector<std::string>* include_paths,
@ -148,8 +147,6 @@ static int generate_code(::google::protobuf::compiler::CodeGenerator* code_gener
if (parsed_file == nullptr) {
return 1;
}
// TODO: Figure out if the dependency list is flat or recursive.
// TODO: Ensure there's a topological ordering here.
std::vector<const ::google::protobuf::FileDescriptor*> transitive_closure;
calculate_transitive_closure(parsed_file, &transitive_closure);
detail::GeneratorContextImpl generator_context(transitive_closure, files_out);

@ -22,6 +22,10 @@ import six
import imp
import os
import importlib
import importlib.machinery
import sys
from grpc_tools import _protoc_compiler
def main(command_arguments):
@ -34,6 +38,16 @@ def main(command_arguments):
command_arguments = [argument.encode() for argument in command_arguments]
return _protoc_compiler.run_main(command_arguments)
def _module_name_to_proto_file(module_name):
components = module_name.split(".")
proto_name = components[-1][:-1*len("_pb2")]
return os.path.sep.join(components[:-1] + [proto_name + ".proto"])
def _proto_file_to_module_name(proto_file):
components = proto_file.split(os.path.sep)
proto_base_name = os.path.splitext(components[-1])[0]
return os.path.sep.join(components[:-1] + [proto_base_name + "_pb2"])
def _import_modules_from_files(files):
modules = []
for filename, code in files:
@ -55,10 +69,13 @@ def _import_modules_from_files(files):
# TODO: Investigate making this even more of a no-op in the case that we have
# truly already imported the module.
def get_protos(protobuf_path, include_paths=None):
if include_paths is None:
include_paths = sys.path
files = _protoc_compiler.get_protos(protobuf_path.encode('ascii'), [include_path.encode('ascii') for include_path in include_paths])
return _import_modules_from_files(files)[-1]
original_sys_path = sys.path
if include_paths is not None:
sys.path = sys.path + include_paths
module_name = _proto_file_to_module_name(protobuf_path)
module = importlib.import_module(module_name)
sys.path = original_sys_path
return module
def get_services(protobuf_path, include_paths=None):
# NOTE: This call to get_protos is a no-op in the case it has already been
@ -74,6 +91,55 @@ def get_protos_and_services(protobuf_path, include_paths=None):
get_services(protobuf_path, include_paths=include_paths))
_proto_code_cache = {}
# TODO: Cache generated code per-process. Check it first to see if it's already
# been generated and, instead, just instantiate using that.
class ProtoLoader(importlib.abc.Loader):
def __init__(self, module_name, protobuf_path, proto_root):
self._module_name = module_name
self._protobuf_path = protobuf_path
self._proto_root = proto_root
def create_module(self, spec):
return None
def _generated_file_to_module_name(self, filepath):
components = filepath.split("/")
return ".".join(components[:-1] + [os.path.splitext(components[-1])[0]])
def exec_module(self, module):
assert module.__name__ == self._module_name
code = None
if self._module_name in _proto_code_cache:
code = _proto_code_cache[self._module_name]
six.exec_(code, module.__dict__)
else:
files = _protoc_compiler.get_protos(self._protobuf_path.encode('ascii'), [path.encode('ascii') for path in sys.path])
for f in files[:-1]:
module_name = self._generated_file_to_module_name(f[0].decode('ascii'))
if module_name not in sys.modules:
if module_name not in _proto_code_cache:
_proto_code_cache[module_name] = f[1]
importlib.import_module(module_name)
six.exec_(files[-1][1], module.__dict__)
class ProtoFinder(importlib.abc.MetaPathFinder):
def find_spec(self, fullname, path, target=None):
filepath = _module_name_to_proto_file(fullname)
for search_path in sys.path:
try:
prospective_path = os.path.join(search_path, filepath)
os.stat(prospective_path)
except FileNotFoundError:
continue
else:
# TODO: Use a stdlib helper function to construct this.
return importlib.machinery.ModuleSpec(fullname, ProtoLoader(fullname, filepath, search_path))
sys.meta_path.append(ProtoFinder())
if __name__ == '__main__':
proto_include = pkg_resources.resource_filename('grpc_tools', '_proto')
sys.exit(main(sys.argv + ['-I{}'.format(proto_include)]))

@ -92,36 +92,50 @@ def _test_syntax_errors():
assert "flawed.proto" in error_str
assert "3:23" in error_str
assert "7:23" in error_str
print(error_str)
else:
assert False, "Compile error expected. None occurred."
# TODO: Test warnings.
class ProtocTest(unittest.TestCase):
def test_import_protos(self):
_run_in_subprocess(_test_import_protos)
# def test_import_protos(self):
# _run_in_subprocess(_test_import_protos)
# def test_import_services(self):
# _run_in_subprocess(_test_import_services)
# def test_import_implicit_include_path(self):
# _run_in_subprocess(_test_import_implicit_include)
def test_import_services(self):
_run_in_subprocess(_test_import_services)
# def test_import_services_without_protos(self):
# _run_in_subprocess(_test_import_services_without_protos)
def test_import_implicit_include_path(self):
_run_in_subprocess(_test_import_implicit_include)
# def test_proto_module_imported_once(self):
# _run_in_subprocess(_test_proto_module_imported_once)
def test_import_services_without_protos(self):
_run_in_subprocess(_test_import_services_without_protos)
# def test_static_dynamic_combo(self):
# _run_in_subprocess(_test_static_dynamic_combo)
def test_proto_module_imported_once(self):
_run_in_subprocess(_test_proto_module_imported_once)
# def test_combined_import(self):
# _run_in_subprocess(_test_combined_import)
def test_static_dynamic_combo(self):
_run_in_subprocess(_test_static_dynamic_combo)
# def test_syntax_errors(self):
# _run_in_subprocess(_test_syntax_errors)
def test_combined_import(self):
_run_in_subprocess(_test_combined_import)
# # TODO: Write test to ensure the right module loader is used.
# def test_importlib_protos(self):
# import sys
# import grpc_tools.protoc
# from grpc_tools import simple_pb2
# self.assertIsNotNone(simple_pb2.SimpleMessage)
def test_syntax_errors(self):
_run_in_subprocess(_test_syntax_errors)
def test_importlib_protos_wrapper(self):
from grpc_tools import protoc
proto_path = "tools/distrib/python/grpcio_tools/"
protos = protoc.get_protos("grpc_tools/simple.proto", [proto_path])
assert protos.SimpleMessage is not None
if __name__ == '__main__':
unittest.main()

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