| # Copyright 2020 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. |
| |
| # Generates a package_config.json file containing all of the packages used |
| # to generate a kernel file. |
| # |
| # Package configs are files which describe metadata about a dart package. |
| # This includes information like the name, dart language version, where to |
| # find the files, etc. The file is required by the dart kernel compiler. |
| # |
| # Parameters |
| # |
| # deps, public_deps (optional) |
| # [list of labels] The targets to generate a manifest for. |
| # See `gn help` for more details. |
| # |
| # testonly, visibility, metadata (optional) |
| # See `gn help`. |
| # |
| # outputs (optional) |
| # Singleton list containing the path to the package_config file. |
| # Defaults to `[ "$target_gen_dir/${target_name}_package_config.json" ]`. |
| template("dart_package_config") { |
| main_target = target_name |
| generate_target = "${target_name}_generate" |
| |
| # Build the name of the output file. |
| if (defined(invoker.outputs)) { |
| _outputs = invoker.outputs |
| assert(_outputs != [] && _outputs == [ _outputs[0] ], |
| "Outputs list must have exactly one element.") |
| package_config_file = _outputs[0] |
| } else { |
| package_config_file = "$target_gen_dir/${target_name}_package_config.json" |
| } |
| intermediate_file = "$package_config_file.partial" |
| |
| # Gather metadata about runtime objects. |
| generated_file(generate_target) { |
| forward_variables_from(invoker, |
| [ |
| "deps", |
| "public_deps", |
| "testonly", |
| ]) |
| |
| visibility = [ ":$main_target" ] |
| |
| data_keys = [ |
| # A list of package configuration entries |
| # |
| # Each entry must contain these values: |
| # - `name`: The name of the package; |
| # - `root_uri`: Path to the package root relative to root_build_dir; |
| # - `package_uri`: The path in which the source lives |
| # |
| # The following entries may optionally be specified |
| # - `language_version`: The dart language version. |
| # - `pubspec_path`: The path to the pubspec file to find the language version |
| "package_config_entries", |
| ] |
| walk_keys = [ "package_config_entry_barrier" ] |
| |
| outputs = [ intermediate_file ] |
| |
| output_conversion = "json" |
| } |
| |
| # Converts the intermediate to a real pacakge_config.json file. |
| action(main_target) { |
| forward_variables_from(invoker, |
| [ |
| "deps", |
| "public_deps", |
| "testonly", |
| "visibility", |
| ]) |
| |
| script = get_label_info("//build/dart:gen_dart_package_config", |
| "target_out_dir") + "/gen_dart_package_config.pyz" |
| |
| inputs = [ intermediate_file ] |
| outputs = [ package_config_file ] |
| depfile = "${target_gen_dir}/${target_name}.d" |
| |
| args = [ |
| "--input", |
| rebase_path(intermediate_file, root_build_dir), |
| "--output", |
| rebase_path(package_config_file, root_build_dir), |
| "--root", |
| rebase_path("//", root_build_dir), |
| "--depfile", |
| rebase_path(depfile, root_build_dir), |
| ] |
| |
| if (!defined(deps)) { |
| deps = [] |
| } |
| deps += [ |
| ":$generate_target", |
| "//build/dart:gen_dart_package_config", |
| ] |
| |
| metadata = { |
| # Add a barrier here to avoid double of inclusion of elements listed in |
| # the generated package config. |
| package_config_entry_barrier = [] |
| |
| if (defined(invoker.metadata)) { |
| forward_variables_from(invoker.metadata, "*") |
| } |
| } |
| } |
| } |