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# Copyright 2017 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Generates a list of all files in a directory.
This script takes in a directory and an output file name as input.
It then reads the directory and creates a list of all file names
in that directory. The list is written to the output file.
There is also an option to pass in '-p' or '--pattern'
which will check each file name against a regular expression
pattern that is passed in. Only files which match the regex
will be written to the list.
"""
from __future__ import print_function
import os
import re
import sys
from optparse import OptionParser
sys.path.insert(
0,
os.path.join(
os.path.dirname(os.path.dirname(os.path.abspath(__file__))), "mojom"))
from mojom.generate.generator import WriteFile
def main():
parser = OptionParser()
parser.add_option('-d', '--directory', help='Read files from DIRECTORY')
parser.add_option('-o', '--output', help='Write list to FILE')
parser.add_option('-p',
'--pattern',
help='Only reads files that name matches PATTERN',
default=".")
(options, _) = parser.parse_args()
pattern = re.compile(options.pattern)
files = [f for f in os.listdir(options.directory) if pattern.match(f)]
contents = '\n'.join(f for f in files) + '\n'
WriteFile(contents, options.output)
if __name__ == '__main__':
sys.exit(main())
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