1# Copyright 2022 The Pigweed Authors 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); you may not 4# use this file except in compliance with the License. You may obtain a copy of 5# the License at 6# 7# https://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12# License for the specific language governing permissions and limitations under 13# the License. 14 15import("//build_overrides/pigweed.gni") 16 17import("$dir_pw_build/python_action.gni") 18 19# This isn't in a declare_args() block as it likely isn't necessary to change 20# this. 21pw_build_RELATIVE_PATH_TRANSFORM_JSON = 22 "$root_build_dir/relative_path_transformations.json" 23 24# Creates a JSON file containing an array of source file names with 25# -ffile-prefix-map style transformations applied to match __FILE__ as seen in 26# C/C++ sources when using pw_build's `relative_paths` config. 27# 28# Args: 29# deps (required): A list of targets to recursively extract file names from. 30# outputs (required): An array with a single element: the path to write the 31# transformed file paths to. The output format is a JSON array of 32# strings. 33template("pw_relative_source_file_names") { 34 _raw_file_names_json = "$target_gen_dir/${target_name}.raw.json" 35 36 # The various pw_* templates add pw_source_files metadata which we 37 # aggregate here. 38 generated_file("${target_name}.raw_source_files") { 39 forward_variables_from(invoker, [ "deps" ]) 40 41 # Rebase the paths so that they match those that are passed to the 42 # compiler. 43 rebase = root_build_dir 44 outputs = [ _raw_file_names_json ] 45 data_keys = [ "pw_source_files" ] 46 output_conversion = "json" 47 } 48 49 pw_python_action(target_name) { 50 deps = [ ":${target_name}.raw_source_files" ] 51 python_deps = [ "$dir_pw_build/py" ] 52 module = "pw_build.file_prefix_map" 53 54 # GN-ism: You can't do invoker.outputs[0], but _outs[0] works. 55 _outs = invoker.outputs 56 args = [ 57 rebase_path(_raw_file_names_json, root_build_dir), 58 "--prefix-map-json", 59 rebase_path(pw_build_RELATIVE_PATH_TRANSFORM_JSON, root_build_dir), 60 "--out", 61 rebase_path(_outs[0], root_build_dir), 62 ] 63 64 inputs = [ _raw_file_names_json ] 65 forward_variables_from(invoker, [ "outputs" ]) 66 } 67} 68