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"""BUILD rules to generate gRPC service interfaces.
You need to load the rules in your BUILD file for use, like:
load("//third_party/grpc:build_defs.bzl", "java_grpc_library")
"""
def _path_ignoring_repository(f):
if (len(f.owner.workspace_root) == 0):
return f.short_path
# If |f| is a generated file, it will have "bazel-out/*/genfiles" prefix
# before "external/workspace", so we need to add the starting index of "external/workspace"
return f.path[f.path.find(f.owner.workspace_root)+len(f.owner.workspace_root)+1:]
def _gensource_impl(ctx):
if len(ctx.attr.srcs) > 1:
fail("Only one src value supported", "srcs")
for s in ctx.attr.srcs:
if s.label.package != ctx.label.package:
print(("in srcs attribute of {0}: Proto source with label {1} should be in "
+ "same package as consuming rule").format(ctx.label, s.label))
srcdotjar = ctx.new_file(ctx.label.name + ".jar")
srcs = [f for dep in ctx.attr.srcs for f in dep.proto.direct_sources]
includes = [f for dep in ctx.attr.srcs for f in dep.proto.transitive_imports.to_list()]
ctx.action(
command = " ".join([
ctx.executable._protoc.path,
"--plugin=protoc-gen-grpc-java={0}".format(ctx.executable._java_plugin.path),
"--grpc-java_out=enable_deprecated={0}:{1}".format(str(ctx.attr.enable_deprecated).lower(), srcdotjar.path)]
+ ["-I{0}={1}".format(_path_ignoring_repository(include), include.path) for include in includes]
+ [src.path for src in srcs]),
inputs = [ctx.executable._java_plugin, ctx.executable._protoc] + srcs + includes,
outputs = [srcdotjar],
use_default_shell_env=True)
ctx.action(
command = "cp '%s' '%s'" % (srcdotjar.path, ctx.outputs.srcjar.path),
inputs = [srcdotjar],
outputs = [ctx.outputs.srcjar])
_java_grpc_gensource = rule(
attrs = {
"srcs": attr.label_list(
mandatory = True,
non_empty = True,
providers = ["proto"],
),
"enable_deprecated": attr.bool(
default = False,
),
"_protoc": attr.label(
default = Label("@com_google_protobuf//:protoc"),
executable = True,
cfg = "host",
allow_files = True,
single_file = True,
),
"_java_plugin": attr.label(
default = Label("@io_bazel//third_party/grpc:grpc-java-plugin"),
executable = True,
cfg = "host",
),
},
outputs = {
"srcjar": "%{name}.srcjar",
},
implementation = _gensource_impl,
)
def java_grpc_library(name, srcs, deps, enable_deprecated=None, visibility=None, constraints=None, **kwargs):
"""Generates and compiles gRPC Java sources for services defined in a proto
file. This rule is compatible with proto_library with java_api_version,
java_proto_library, and java_lite_proto_library.
Do note that this rule only scans through the proto file for RPC services. It
does not generate Java classes for proto messages. You will need a separate
proto_library with java_api_version, java_proto_library, or
java_lite_proto_library rule.
Args:
name: (str) A unique name for this rule. Required.
srcs: (list) a single proto_library target that contains the schema of the
service. Required.
deps: (list) a single java_proto_library target for the proto_library in
srcs. Required.
visibility: (list) the visibility list
**kwargs: Passed through to generated targets
"""
gensource_name = name + "_srcs"
_java_grpc_gensource(
name = gensource_name,
srcs = srcs,
enable_deprecated = enable_deprecated,
visibility = ["//visibility:private"],
tags = [
"avoid_dep",
],
**kwargs
)
native.java_library(
name = name,
srcs = [gensource_name],
visibility = visibility,
deps = [
"@io_bazel//third_party:javax_annotations",
"@io_bazel//third_party:jsr305",
"@io_bazel//third_party/grpc:grpc-jar",
"@io_bazel//third_party:guava",
"@com_google_protobuf//:protobuf_java",
] + deps,
**kwargs
)
|
