Copy build script from Cobalt

chrobalt/build/gn.py

@@ -0,0 +1,76 @@
+#!/usr/bin/env python3
+# Copyright 2021 The Cobalt Authors. All Rights Reserved.
+#
+# 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.
+
+import argparse
+import os
+from pathlib import Path
+from typing import List
+
+_BUILD_TYPES = ['debug', 'devel', 'qa']
+
+def main(out_directory: str, platform: str, build_type: str,
+         overwrite_args: bool, gn_gen_args: List[str]):
+    platform_path = 'chrobalt/linux'
+    dst_args_gn_file = os.path.join(out_directory, 'args.gn')
+    src_args_gn_file = os.path.join(platform_path, 'args.gn')
+    Path(out_directory).mkdir(parents=True, exist_ok=True)
+
+if __name__ == '__main__':
+  parser = argparse.ArgumentParser()
+  builds_directory_group = parser.add_mutually_exclusive_group()
+  builds_directory_group.add_argument(
+      'out_directory',
+      type=str,
+      nargs='?',
+      help='Path to the directory to build in.')
+
+  parser.add_argument(
+      '-p',
+      '--platform',
+      default='linux-x64x11',
+      choices=['linux-x64x11'],
+      help='The platform to build.')
+  parser.add_argument(
+      '-c',
+      '-C',
+      '--build_type',
+      default='devel',
+      choices=_BUILD_TYPES,
+      help='The build_type (configuration) to build with.')
+  parser.add_argument(
+      '--overwrite_args',
+      default=False,
+      action='store_true',
+      help='Whether or not to overwrite an existing args.gn file if one exists '
+      'in the out directory. In general, if the file exists, you should run '
+      '`gn args <out_directory>` to edit it instead.')
+  parser.add_argument(
+      '--no-check',
+      default=False,
+      action='store_true',
+      help='Pass this flag to disable the header dependency gn check.')
+  script_args, gen_args = parser.parse_known_args()
+
+  if not script_args.no_check:
+    gen_args.append('--check')
+
+  if script_args.out_directory:
+    builds_out_directory = script_args.out_directory
+  else:
+    builds_directory = 'out'
+    builds_out_directory = os.path.join(
+        builds_directory, f'{script_args.platform}_{script_args.build_type}')
+  main(builds_out_directory, script_args.platform, script_args.build_type,
+       script_args.overwrite_args, gen_args)