gn/protozero_descriptor_diff.gni

# Copyright (C) 2025 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import("perfetto.gni")

template("protozero_descriptor_diff") {
  if (build_with_chromium ||
      (perfetto_build_with_embedder && !is_perfetto_build_generator)) {
    name = "${target_name}_gen"
  } else {
    name = "${target_name}"
  }

  action(name) {
    if (host_os == "win") {
      _host_executable_suffix = ".exe"
    } else {
      _host_executable_suffix = ""
    }

    binary_label = "${perfetto_root_path}/src/protozero/descriptor_diff:protozero_descriptor_diff($host_toolchain)"
    binary_path = get_label_info(binary_label, "root_out_dir") +
                  "/protozero_descriptor_diff" + _host_executable_suffix
    binary_rebased_path = "./" + rebase_path(binary_path, root_build_dir)

    deps = [
      "${perfetto_root_path}/src/protozero/descriptor_diff:protozero_descriptor_diff($host_toolchain)",
      invoker.minuend_descriptor_target,
      invoker.subtrahend_descriptor_target,
    ]
    script = "${perfetto_root_path}/gn/run_binary.py"

    outputs = [ "$target_gen_dir/${invoker.generate_descriptor}" ]

    minuend_descriptor_file_path =
        get_label_info(invoker.minuend_descriptor_target, "target_gen_dir") +
        "/${invoker.minuend_descriptor_name}"
    subtrahend_descriptor_file_path =
        get_label_info(invoker.subtrahend_descriptor_target, "target_gen_dir") +
        "/${invoker.subtrahend_descriptor_name}"

    args = [
      binary_rebased_path,
      "--out",
      rebase_path(outputs[0], root_build_dir),
      "--minuend",
      rebase_path(minuend_descriptor_file_path, root_build_dir),
      "--subtrahend",
      rebase_path(subtrahend_descriptor_file_path, root_build_dir),
    ]
    metadata = {
      perfetto_action_type_for_generator = [ "protozero_descriptor_diff" ]
      perfetto_minuend_descriptor =
          [ get_label_info(invoker.minuend_descriptor_target,
                           "label_no_toolchain") ]

      perfetto_subtrahend_descriptor =
          [ get_label_info(invoker.subtrahend_descriptor_target,
                           "label_no_toolchain") ]
    }
  }
}