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|
"""Build rule for java_grpc_library."""
load("@bazel_tools//tools/jdk:toolchain_utils.bzl", "find_java_runtime_toolchain", "find_java_toolchain")
_JavaRpcToolchainInfo = provider(
fields = [
"host_javabase",
"java_toolchain",
"plugin",
"plugin_arg",
"protoc",
"runtime",
],
)
def _java_rpc_toolchain_impl(ctx):
return [
_JavaRpcToolchainInfo(
host_javabase = ctx.attr._host_javabase,
java_toolchain = ctx.attr._java_toolchain,
plugin = ctx.executable.plugin,
plugin_arg = ctx.attr.plugin_arg,
protoc = ctx.executable._protoc,
runtime = ctx.attr.runtime,
),
platform_common.ToolchainInfo(), # Magic for b/78647825
]
java_rpc_toolchain = rule(
attrs = {
# This attribute has a "magic" name recognized by the native DexArchiveAspect (b/78647825).
"runtime": attr.label_list(
cfg = "target",
providers = [JavaInfo],
),
"plugin": attr.label(
cfg = "host",
executable = True,
),
"plugin_arg": attr.string(),
"_protoc": attr.label(
cfg = "host",
default = Label("@com_google_protobuf//:protoc"),
executable = True,
),
"_java_toolchain": attr.label(
default = Label("@bazel_tools//tools/jdk:current_java_toolchain"),
),
"_host_javabase": attr.label(
cfg = "host",
default = Label("@bazel_tools//tools/jdk:current_java_runtime"),
),
},
provides = [
_JavaRpcToolchainInfo,
platform_common.ToolchainInfo,
],
implementation = _java_rpc_toolchain_impl,
)
# "repository" here is for Bazel builds that span multiple WORKSPACES.
def _path_ignoring_repository(f):
# Bazel creates a _virtual_imports directory in case the .proto source files
# need to be accessed at a path that's different from their source path:
# https://github.com/bazelbuild/bazel/blob/0.27.1/src/main/java/com/google/devtools/build/lib/rules/proto/ProtoCommon.java#L289
#
# In that case, the import path of the .proto file is the path relative to
# the virtual imports directory of the rule in question.
virtual_imports = "/_virtual_imports/"
if virtual_imports in f.path:
return f.path.split(virtual_imports)[1].split("/", 1)[1]
elif len(f.owner.workspace_root) == 0:
# |f| is in the main repository
return f.short_path
else:
# 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 _java_rpc_library_impl(ctx):
if len(ctx.attr.srcs) != 1:
fail("Exactly one src value supported", "srcs")
if ctx.attr.srcs[0].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, ctx.attr.srcs[0].label))
toolchain = ctx.attr._toolchain[_JavaRpcToolchainInfo]
srcs = ctx.attr.srcs[0][ProtoInfo].direct_sources
descriptor_set_in = ctx.attr.srcs[0][ProtoInfo].transitive_descriptor_sets
srcjar = ctx.actions.declare_file("%s-proto-gensrc.jar" % ctx.label.name)
args = ctx.actions.args()
args.add(toolchain.plugin, format = "--plugin=protoc-gen-rpc-plugin=%s")
args.add("--rpc-plugin_out={0}:{1}".format(toolchain.plugin_arg, srcjar.path))
args.add_joined("--descriptor_set_in", descriptor_set_in, join_with = ctx.host_configuration.host_path_separator)
args.add_all(srcs, map_each = _path_ignoring_repository)
ctx.actions.run(
inputs = depset([toolchain.plugin] + srcs, transitive = [descriptor_set_in]),
outputs = [srcjar],
executable = toolchain.protoc,
arguments = [args],
)
deps_java_info = java_common.merge([dep[JavaInfo] for dep in ctx.attr.deps])
java_info = java_common.compile(
ctx,
java_toolchain = find_java_toolchain(ctx, toolchain.java_toolchain),
host_javabase = find_java_runtime_toolchain(ctx, toolchain.host_javabase),
source_jars = [srcjar],
output = ctx.outputs.jar,
output_source_jar = ctx.outputs.srcjar,
deps = [
java_common.make_non_strict(deps_java_info),
] + [dep[JavaInfo] for dep in toolchain.runtime],
)
return [java_info]
_java_grpc_library = rule(
attrs = {
"srcs": attr.label_list(
mandatory = True,
allow_empty = False,
providers = [ProtoInfo],
),
"deps": attr.label_list(
mandatory = True,
allow_empty = False,
providers = [JavaInfo],
),
"_toolchain": attr.label(
default = Label("//compiler:java_grpc_library_toolchain"),
),
},
fragments = ["java"],
outputs = {
"jar": "lib%{name}.jar",
"srcjar": "lib%{name}-src.jar",
},
provides = [JavaInfo],
implementation = _java_rpc_library_impl,
)
_java_lite_grpc_library = rule(
attrs = {
"srcs": attr.label_list(
mandatory = True,
allow_empty = False,
providers = [ProtoInfo],
),
"deps": attr.label_list(
mandatory = True,
allow_empty = False,
providers = [JavaInfo],
),
# This attribute has a "magic" name recognized by the native DexArchiveAspect (b/78647825).
"_toolchain": attr.label(
default = Label("//compiler:java_lite_grpc_library_toolchain"),
),
},
fragments = ["java"],
outputs = {
"jar": "lib%{name}.jar",
"srcjar": "lib%{name}-src.jar",
},
provides = [JavaInfo],
implementation = _java_rpc_library_impl,
)
def java_grpc_library(
name,
srcs,
deps,
flavor = None,
**kwargs):
"""Generates gRPC Java code for services in a `proto_library`.
This rule only generates code for services; it does not generate code for
messages. You will need a separate java_proto_library or
java_lite_proto_library rule.
Args:
name: A unique name for this rule.
srcs: (List of `labels`) a single proto_library target that contains the
schema of the service.
deps: (List of `labels`) a single java_proto_library or
java_lite_proto_library target for the proto_library in srcs.
flavor: (str) "normal" (default) for normal proto runtime. "lite"
for the lite runtime.
**kwargs: Other common attributes
"""
if len(deps) > 1:
print("Multiple values in 'deps' is deprecated in " + name)
if flavor == None or flavor == "normal":
_java_grpc_library(
name = name,
srcs = srcs,
deps = deps,
**kwargs
)
elif flavor == "lite":
_java_lite_grpc_library(
name = name,
srcs = srcs,
deps = deps,
**kwargs
)
else:
fail("Flavor must be normal or lite")
|
