build/drivers/assert_driver_components.gni

# Copyright 2021 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Asserts that there are no dependencies on fuchsia_driver targets
# unless it's an indirect dependency through the fuchsia_driver_component
# target. In other words, asserts that all fuchsia_driver targets are
# being used through a fuchsia_driver_component. This shows that there
# aren't any drivers that are missing a component manifest.
#
# Parameters
#   deps
#   testonly
#   visibility
template("assert_driver_components") {
  metadata_check_target = "${target_name}_metadata_check"
  metadata_check_output = "${target_gen_dir}/${target_name}_metadata_output"
  generated_file(metadata_check_target) {
    forward_variables_from(invoker, [ "testonly" ])
    visibility = [ ":*" ]
    outputs = [ metadata_check_output ]
    deps = invoker.deps
    data_keys = [ "fuchsia_driver_labels" ]
    walk_keys = [ "driver_component_barrier" ]
  }

  action(target_name) {
    forward_variables_from(invoker, [ "testonly" ])
    deps = [ ":${metadata_check_target}" ]
    script = "//build/drivers/assert_driver_components.py"
    inputs = [ metadata_check_output ]
    outputs = [ "${target_out_dir}/${target_name}_assert_driver_components" ]
    args = [
      "--metadata_file",
      rebase_path(metadata_check_output, root_build_dir),
      "--output",
      rebase_path(outputs[0], root_build_dir),
    ]
  }
}