third_party/gn/dxc/build/generate_version_include.gni

# Copyright 2023 The Dawn Authors
#
# 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.

template("generate_version_include") {
  assert(defined(invoker.input_file), "must set 'input_file' in $target_name")
  assert(defined(invoker.output_file), "must set 'output_file' in $target_name")

  if (!defined(invoker.input_file)) {
    # No input file, generate one
    assert(false, "Fix gen_version.py so that it outputs to a file")
    action(target_name) {
      script = "${dawn_dxc_dir}/utils/version/gen_version.py"
      outputs = [ "${target_gen_dir}/${invoker.output_file}" ]
      args = []
      if (defined(invoker.gen_flags)) {
        args += invoker.gen_flags
      }
      args += [
        ">",  # TODO(amaiorano): This doesn't work. Need a way to route script
              # output to a file (modify script or create a 'shell_command'
              # action template)
        rebase_path(invoker.output_file, root_build_dir),
      ]
    }
  } else {
    # Input file provided, just copy it
    copy(target_name) {
      sources = [ invoker.input_file ]
      outputs = [ "${target_gen_dir}/${invoker.output_file}" ]
    }
  }
}