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Diffstat (limited to 'build/rmdir_and_stamp.py')
-rwxr-xr-x | build/rmdir_and_stamp.py | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/build/rmdir_and_stamp.py b/build/rmdir_and_stamp.py new file mode 100755 index 0000000..6aa11f8 --- /dev/null +++ b/build/rmdir_and_stamp.py @@ -0,0 +1,45 @@ +#!/usr/bin/env python +# Copyright (c) 2012 The Chromium Authors. All rights reserved. +# Use of this source code is governed by a BSD-style license that can be +# found in the LICENSE file. + +"""Wipes out a directory recursively and then touches a stamp file. + +This odd pairing of operations is used to support build scripts which +slurp up entire directories (e.g. build/android/javac.py when handling +generated sources) as inputs. + +The general pattern of use is: + + - Add a target which generates |gen_sources| into |out_path| from |inputs|. + - Include |stamp_file| as an input for that target or any of its rules which + generate files in |out_path|. + - Add an action which depends on |inputs| and which outputs |stamp_file|; + the action should run this script and pass |out_path| and |stamp_file| as + its arguments. + +The net result is that you will force |out_path| to be wiped and all +|gen_sources| to be regenerated any time any file in |inputs| changes. + +See //third_party/mojo/mojom_bindings_generator.gypi for an example use case. + +""" + +import errno +import os +import shutil +import sys + + +def Main(dst_dir, stamp_file): + try: + shutil.rmtree(os.path.normpath(dst_dir)) + except OSError as e: + # Ignore only "not found" errors. + if e.errno != errno.ENOENT: + raise e + with open(stamp_file, 'a'): + os.utime(stamp_file, None) + +if __name__ == '__main__': + sys.exit(Main(sys.argv[1], sys.argv[2])) |