Use static go build and allow to bundle sources.

This allows to copy the bundled sources to a ChromeOS / Android
package, including the build script, and then
build from there without a dependency on toolchain-utils
itself.

BUG=chromium:773875
TEST=unit test

Change-Id: Ie9fc4bb93d556684db5fa59f4829ce257f86e023
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/1709826
Tested-by: Tobias Bosch <tbosch@google.com>
Reviewed-by: George Burgess <gbiv@chromium.org>

1 files changed, 59 insertions, 0 deletions

diff --git a/compiler_wrapper/bundle.py b/compiler_wrapper/bundle.py
new file mode 100755
index 00000000..44799b6f
--- /dev/null
+++ b/compiler_wrapper/bundle.py
@@ -0,0 +1,59 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+# Copyright 2019 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Build script that copies the go sources to a build destination."""
+
+from __future__ import print_function
+
+import argparse
+import os.path
+import re
+import shutil
+import subprocess
+import sys
+
+
+def parse_args():
+  parser = argparse.ArgumentParser()
+  parser.add_argument('output_dir')
+  return parser.parse_args()
+
+
+def copy_files(input_dir, output_dir):
+  for filename in os.listdir(input_dir):
+    if ((filename.endswith('.go') and not filename.endswith('_test.go')) or
+        filename == 'build'):
+      shutil.copy(
+          os.path.join(input_dir, filename), os.path.join(output_dir, filename))
+
+
+def read_change_id():
+  last_commit_msg = subprocess.check_output(['git', 'log', '-1', '--pretty=%B'])
+  match = re.search('Change-Id: (\\w+)', last_commit_msg)
+  if not match:
+    sys.exit('Couldn\'t find Change-Id in last commit message.')
+  return match.group(1)
+
+
+def write_readme(input_dir, output_dir, change_id):
+  with open(os.path.join(input_dir, 'bundle.README'), 'r') as r, \
+       open(os.path.join(output_dir, 'README'), 'w') as w:
+    content = r.read()
+    w.write(content.format(change_id=change_id))
+
+
+def main():
+  args = parse_args()
+  change_id = read_change_id()
+  shutil.rmtree(args.output_dir, ignore_errors=True)
+  os.makedirs(args.output_dir)
+  input_dir = os.path.dirname(__file__)
+  copy_files(input_dir, args.output_dir)
+  write_readme(input_dir, args.output_dir, change_id)
+
+
+if __name__ == '__main__':
+  main()