mirror of https://github.com/grpc/grpc.git
The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
3.0 KiB
83 lines
3.0 KiB
"""Generates C++ grpc stubs from proto_library rules. |
|
|
|
This is an internal rule used by cc_grpc_library, and shouldn't be used |
|
directly. |
|
""" |
|
|
|
def generate_cc_impl(ctx): |
|
"""Implementation of the generate_cc rule.""" |
|
protos = [f for src in ctx.attr.srcs for f in src.proto.direct_sources] |
|
includes = [f for src in ctx.attr.srcs for f in src.proto.transitive_imports] |
|
outs = [] |
|
if ctx.executable.plugin: |
|
outs += [proto.basename[:-len(".proto")] + ".grpc.pb.h" for proto in protos] |
|
outs += [proto.basename[:-len(".proto")] + ".grpc.pb.cc" for proto in protos] |
|
else: |
|
outs += [proto.basename[:-len(".proto")] + ".pb.h" for proto in protos] |
|
outs += [proto.basename[:-len(".proto")] + ".pb.cc" for proto in protos] |
|
out_files = [ctx.new_file(out) for out in outs] |
|
# The following should be replaced with ctx.configuration.buildout |
|
# whenever this is added to Skylark. |
|
dir_out = out_files[0].dirname[:-len(protos[0].dirname)] |
|
|
|
arguments = [] |
|
if ctx.executable.plugin: |
|
arguments += ["--plugin=protoc-gen-PLUGIN=" + ctx.executable.plugin.path] |
|
arguments += ["--PLUGIN_out=" + ",".join(ctx.attr.flags) + ":" + dir_out] |
|
additional_input = [ctx.executable.plugin] |
|
else: |
|
arguments += ["--cpp_out=" + ",".join(ctx.attr.flags) + ":" + dir_out] |
|
additional_input = [] |
|
arguments += ["-I{0}={0}".format(include.path) for include in includes] |
|
arguments += [proto.path for proto in protos] |
|
|
|
# create a list of well known proto files if the argument is non-None |
|
well_known_proto_files = [] |
|
if ctx.attr.well_known_protos: |
|
f = ctx.attr.well_known_protos.files.to_list()[0].dirname |
|
if f != "external/com_google_protobuf/src/google/protobuf": |
|
print("Error: Only @com_google_protobuf//:well_known_protos is supported") |
|
else: |
|
# f points to "external/com_google_protobuf/src/google/protobuf" |
|
# add -I argument to protoc so it knows where to look for the proto files. |
|
arguments += ["-I{0}".format(f + "/../..")] |
|
well_known_proto_files = [f for f in ctx.attr.well_known_protos.files] |
|
|
|
ctx.action( |
|
inputs = protos + includes + additional_input + well_known_proto_files, |
|
outputs = out_files, |
|
executable = ctx.executable._protoc, |
|
arguments = arguments, |
|
) |
|
|
|
return struct(files=set(out_files)) |
|
|
|
generate_cc = rule( |
|
attrs = { |
|
"srcs": attr.label_list( |
|
mandatory = True, |
|
non_empty = True, |
|
providers = ["proto"], |
|
), |
|
"plugin": attr.label( |
|
executable = True, |
|
providers = ["files_to_run"], |
|
cfg = "host", |
|
), |
|
"flags": attr.string_list( |
|
mandatory = False, |
|
allow_empty = True, |
|
), |
|
"well_known_protos" : attr.label( |
|
mandatory = False, |
|
), |
|
"_protoc": attr.label( |
|
default = Label("//external:protocol_compiler"), |
|
executable = True, |
|
cfg = "host", |
|
), |
|
}, |
|
# We generate .h files, so we need to output to genfiles. |
|
output_to_genfiles = True, |
|
implementation = generate_cc_impl, |
|
)
|
|
|