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# Copyright 2018 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.
"""Generates an umbrella header for an iOS framework."""
import argparse
import datetime
import os
import re
import string
HEADER_TEMPLATE = string.Template('''\
// Copyright $year 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.
//
// This file is auto-generated by //build/ios/config/generate_umbrella_header.py
#ifndef $header_guard
#define $header_guard
$imports
#endif // $header_guard
''')
def ComputeHeaderGuard(file_path):
"""Computes the header guard for a file path.
Args:
file_path: The path to convert into an header guard.
Returns:
The header guard string for the file_path.
"""
return re.sub(r'[.+/\\]', r'_', file_path.upper()) + '_'
def WriteUmbrellaHeader(output_path, imported_headers):
"""Writes the umbrella header.
Args:
output_path: The path to the umbrella header.
imported_headers: A list of headers to #import in the umbrella header.
"""
year = datetime.date.today().year
header_guard = ComputeHeaderGuard(output_path)
imports = '\n'.join([
'#import "%s"' % os.path.basename(header)
for header in sorted(imported_headers)
])
with open(output_path, 'w') as output_file:
output_file.write(
HEADER_TEMPLATE.safe_substitute({
'year': year,
'header_guard': header_guard,
'imports': imports,
}))
def Main():
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument('--output-path', required=True, type=str,
help='Path to the generated umbrella header.')
parser.add_argument('imported_headers', type=str, nargs='+',
help='Headers to #import in the umbrella header.')
options = parser.parse_args()
return WriteUmbrellaHeader(options.output_path, options.imported_headers)
if __name__ == '__main__':
Main()
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