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# Copyright 2019 the V8 project authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import("//build_overrides/build.gni")
# This file should not be pulled in chromium builds.
assert(!build_with_chromium)
template("proto_library") {
assert(defined(invoker.sources))
proto_sources = invoker.sources
set_sources_assignment_filter([])
if (host_os == "win") {
host_executable_suffix = ".exe"
} else {
host_executable_suffix = ""
}
# All the proto imports should be relative to the project root.
proto_in_dir = "//"
if (defined(invoker.proto_in_dir)) {
proto_in_dir = invoker.proto_in_dir
}
assert(defined(invoker.proto_out_dir),
"proto_out_dir must be explicitly defined")
proto_out_dir = invoker.proto_out_dir
# We don't support generate_python in the standalone build, but still must
# check that the caller sets this to false. This is because when building in
# the chromium tree, chromium's proto_library.gni in chrome (!= this) defaults
# generate_python = true.
assert(defined(invoker.generate_python) && !invoker.generate_python)
# If false will not generate the default .pb.{cc,h} files. Used for custom
# codegen plugins.
generate_cc = true
if (defined(invoker.generate_cc)) {
generate_cc = invoker.generate_cc
}
generate_descriptor = ""
if (defined(invoker.generate_descriptor)) {
generate_descriptor = invoker.generate_descriptor
}
if (defined(invoker.generator_plugin_label)) {
plugin_host_label = invoker.generator_plugin_label + "($host_toolchain)"
plugin_path =
get_label_info(plugin_host_label, "root_out_dir") + "/" +
get_label_info(plugin_host_label, "name") + host_executable_suffix
generate_with_plugin = true
} else if (defined(invoker.generator_plugin_script)) {
plugin_path = invoker.generator_plugin_script
generate_with_plugin = true
} else {
generate_with_plugin = false
}
if (generate_with_plugin) {
if (defined(invoker.generator_plugin_suffix)) {
generator_plugin_suffixes = [
"${invoker.generator_plugin_suffix}.h",
"${invoker.generator_plugin_suffix}.cc",
]
} else {
generator_plugin_suffixes = invoker.generator_plugin_suffixes
}
}
cc_out_dir = "$root_gen_dir/" + proto_out_dir
rel_cc_out_dir = rebase_path(cc_out_dir, root_build_dir)
protos = rebase_path(proto_sources, proto_in_dir)
protogens = []
if (generate_descriptor != "") {
protogens += [ "$root_gen_dir/" + generate_descriptor ]
}
foreach(proto, protos) {
proto_dir = get_path_info(proto, "dir")
proto_name = get_path_info(proto, "name")
proto_path = proto_dir + "/" + proto_name
if (generate_cc) {
protogens += [
"$cc_out_dir/$proto_path.pb.h",
"$cc_out_dir/$proto_path.pb.cc",
]
}
if (generate_with_plugin) {
foreach(suffix, generator_plugin_suffixes) {
protogens += [ "$cc_out_dir/${proto_path}${suffix}" ]
}
}
}
config_name = "${target_name}_config"
action_name = "${target_name}_gen"
source_set_name = target_name
config(config_name) {
include_dirs = [ cc_out_dir ]
}
# The XXX_gen action that generates the .pb.{cc,h} files.
action(action_name) {
visibility = [ ":$source_set_name" ]
script = "//build/gn_run_binary.py"
sources = proto_sources
outputs = get_path_info(protogens, "abspath")
protoc_label = "//:protoc($host_toolchain)"
protoc_path = get_label_info(protoc_label, "root_out_dir") + "/protoc" +
host_executable_suffix
args = [
# Path should be rebased because |root_build_dir| for current toolchain
# may be different from |root_out_dir| of protoc built on host toolchain.
"./" + rebase_path(protoc_path, root_build_dir),
"--proto_path",
rebase_path(proto_in_dir, root_build_dir),
]
if (generate_cc) {
args += [
"--cpp_out",
rel_cc_out_dir,
]
}
if (generate_descriptor != "") {
args += [
"--include_imports",
"--descriptor_set_out",
rebase_path("$root_gen_dir/" + generate_descriptor, root_build_dir),
]
}
if (generate_with_plugin) {
plugin_path_rebased = rebase_path(plugin_path, root_build_dir)
plugin_out_args = ""
if (defined(invoker.generator_plugin_options)) {
plugin_out_args += invoker.generator_plugin_options
}
plugin_out_args += ":$rel_cc_out_dir"
args += [
"--plugin=protoc-gen-plugin=$plugin_path_rebased",
"--plugin_out=$plugin_out_args",
]
}
args += rebase_path(proto_sources, root_build_dir)
inputs = [
protoc_path,
]
deps = [
protoc_label,
]
if (generate_with_plugin) {
inputs += [ plugin_path ]
if (defined(plugin_host_label)) {
# Action depends on native generator plugin but for host toolchain only.
deps += [ plugin_host_label ]
}
}
if (defined(invoker.proto_deps)) {
deps += invoker.proto_deps
}
if (defined(invoker.deps)) {
deps += invoker.deps
}
} # action "${target_name}_gen"
# The source_set that builds the generated .pb.cc files.
source_set(target_name) {
forward_variables_from(invoker,
[
"defines",
"include_dirs",
"public_configs",
"testonly",
"visibility",
])
# Exclude the config.descriptor file which is an output for some reason.
set_sources_assignment_filter([ "*.descriptor" ])
sources = get_target_outputs(":$action_name")
set_sources_assignment_filter(sources_assignment_filter)
# configs -= [ "//gn/standalone:extra_warnings" ]
if (defined(invoker.extra_configs)) {
configs += invoker.extra_configs
}
if (!defined(invoker.public_configs)) {
public_configs = []
}
public_configs += [
"//:protobuf_gen_config",
":$config_name",
]
# Use protobuf_full only for tests.
if (defined(invoker.use_protobuf_full) &&
invoker.use_protobuf_full == true) {
deps = [
"//:protobuf_full",
]
} else {
deps = [
"//:protobuf_lite",
]
}
deps += [ ":$action_name" ]
if (defined(invoker.deps)) {
deps += invoker.deps
}
if (defined(invoker.link_deps)) {
deps += invoker.link_deps
}
} # source_set(target_name)
} # template
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