build/images/collect_blob_manifest.gni

# Copyright 2019 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.

import("//build/package.gni")

# collect from the transitive closure of package dependencies all blobs into a
# single de-duplicated manfiest file.
#
# Paramters
#
#   One of deps, data_deps, or public_deps are required to be non-empty for any
#   meaningful operation.
#
#   outputs (required)
#     [list containing one string] The output location for the manifest.
#
#   data_deps (optional)
#   deps (optional)
#   metadata (optional)
#   output_conversion (optional)
#   public_deps (optional)
#   testonly (optional)
#   visibility (optional)
#     Same as for any GN `generated_file()` target.
template("collect_blob_manifest") {
  list_name = target_name + ".list"
  list_path = target_gen_dir + "/" + list_name
  package_metadata_list(list_name) {
    forward_variables_from(invoker, [
      "data_deps",
      "deps",
      "public_deps",
      "testonly",
      "data_keys",
    ])

    data_keys = ["blob_manifests"]

    outputs = [list_path]
  }

  action(target_name) {
    forward_variables_from(invoker, [
      "inputs",
      "outputs",
      "testonly",
      "visibility",
    ])

    assert([outputs[0]] == outputs, "collect_blob_manifest requires exactly one output")

    inputs = [list_path]
    deps = [":" + list_name]

    script = "//build/images/manifest_list_collect_unique_blobs.sh"
    args = [
      rebase_path(inputs[0], root_build_dir),
      rebase_path(outputs[0], root_build_dir),
    ]
  }
}