common-mk/generate-dbus-adaptors.gni

# Copyright 2018 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

template("generate_dbus_adaptors") {
  forward_variables_from(invoker,
                         [
                           "dbus_adaptors_out_dir",
                           "dbus_service_config",
                         ])
  h_dir = "${root_gen_dir}/${dbus_adaptors_out_dir}"
  h_tmp_dir = "${root_gen_dir}/dbus_tmp/${dbus_adaptors_out_dir}"

  if (!defined(dbus_service_config) || dbus_service_config == "") {
    service_config = ""
  } else {
    service_config = rebase_path(dbus_service_config)
  }

  # Following three actions is to ensure that the headers by the new Go
  # dbus-binding generator are the same as those by the original C++
  # dbus-binding generator.
  # TODO(crbug.com/983008): Remove the action of generating bindings by C++
  # generator and the action making diff after the migration completes.

  headers_by_cpp_generator = "__${target_name}_cpp"
  action_foreach(headers_by_cpp_generator) {
    sources = invoker.sources
    script = "//common-mk/file_generator_wrapper.py"
    outputs = [ "${h_tmp_dir}/{{source_name_part}}.h" ]
    args = [
      "generate-chromeos-dbus-bindings",
      "{{source}}",
      "--service-config=${service_config}",
      "--adaptor=${h_tmp_dir}/{{source_name_part}}.h",
    ]
  }

  headers_by_go_generator = "__${target_name}_go"
  action_foreach(headers_by_go_generator) {
    sources = invoker.sources
    script = "//common-mk/file_generator_wrapper.py"
    outputs = [ "${h_dir}/{{source_name_part}}.h" ]
    args = [
      "go-generate-chromeos-dbus-bindings",
      "-adaptor=${h_dir}/{{source_name_part}}.h",
      "{{source}}",
    ]
  }

  action_foreach("__${target_name}_diff") {
    sources = invoker.sources
    script = "//common-mk/generated_dbus_header_diff.py"
    outputs = [ "${h_tmp_dir}/{{source_name_part}}.h.diff" ]
    args = [
      "--out",
      "${h_tmp_dir}/{{source_name_part}}.h.diff",
      "--cpp",
      "${h_tmp_dir}/{{source_name_part}}.h",
      "--go",
      "${h_dir}/{{source_name_part}}.h",
    ]
    deps = [
      ":${headers_by_cpp_generator}",
      ":${headers_by_go_generator}",
    ]
  }

  group(target_name) {
    deps = [
      ":${headers_by_go_generator}",
      ":__${target_name}_diff",
    ]
  }
}