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#!/usr/bin/env python
# Copyright 2014 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.
"""Create files with copyright boilerplate and header include guards.
Usage: tools/boilerplate.py path/to/file.{h,cc}
"""
from datetime import date
import os
import os.path
import sys
LINES = [
'Copyright %d The Chromium Authors. All rights reserved.' %
date.today().year,
'Use of this source code is governed by a BSD-style license that can be',
'found in the LICENSE file.'
]
EXTENSIONS_TO_COMMENTS = {
'h': '//',
'cc': '//',
'mm': '//',
'js': '//',
'py': '#'
}
def _GetHeader(filename):
_, ext = os.path.splitext(filename)
ext = ext[1:]
comment = EXTENSIONS_TO_COMMENTS[ext] + ' '
return '\n'.join([comment + line for line in LINES])
def _CppHeader(filename):
guard = filename.replace('/', '_').replace('.', '_').upper() + '_'
return '\n'.join([
'',
'#ifndef ' + guard,
'#define ' + guard,
'',
'#endif // ' + guard,
''
])
def _CppImplementation(filename):
base, _ = os.path.splitext(filename)
include = '#include "' + base + '.h"'
return '\n'.join(['', include])
def _CreateFile(filename):
contents = _GetHeader(filename) + '\n'
if filename.endswith('.h'):
contents += _CppHeader(filename)
elif filename.endswith('.cc') or filename.endswith('.mm'):
contents += _CppImplementation(filename)
fd = open(filename, 'w')
fd.write(contents)
fd.close()
def Main():
files = sys.argv[1:]
if len(files) < 1:
print >> sys.stderr, 'Usage: boilerplate.py path/to/file.h path/to/file.cc'
return 1
# Perform checks first so that the entire operation is atomic.
for f in files:
_, ext = os.path.splitext(f)
if not ext[1:] in EXTENSIONS_TO_COMMENTS:
print >> sys.stderr, 'Unknown file type for %s' % f
return 2
if os.path.exists(f):
print >> sys.stderr, 'A file at path %s already exists' % f
return 2
for f in files:
_CreateFile(f)
if __name__ == '__main__':
sys.exit(Main())
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