|
150
|
1 #!/usr/bin/env python
|
|
|
2 #===----------------------------------------------------------------------===##
|
|
|
3 #
|
|
|
4 # Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
|
5 # See https://llvm.org/LICENSE.txt for license information.
|
|
|
6 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
|
7 #
|
|
|
8 #===----------------------------------------------------------------------===##
|
|
|
9
|
|
|
10 from argparse import ArgumentParser
|
|
|
11 import sys
|
|
|
12
|
|
|
13 def print_and_exit(msg):
|
|
|
14 sys.stderr.write(msg + '\n')
|
|
|
15 sys.exit(1)
|
|
|
16
|
|
|
17 def main():
|
|
|
18 parser = ArgumentParser(
|
|
|
19 description="Concatenate two files into a single file")
|
|
|
20 parser.add_argument(
|
|
|
21 '-o', '--output', dest='output', required=True,
|
|
|
22 help='The output file. stdout is used if not given',
|
|
|
23 type=str, action='store')
|
|
|
24 parser.add_argument(
|
|
|
25 'files', metavar='files', nargs='+',
|
|
|
26 help='The files to concatenate')
|
|
|
27
|
|
|
28 args = parser.parse_args()
|
|
|
29
|
|
|
30 if len(args.files) < 2:
|
|
|
31 print_and_exit('fewer than 2 inputs provided')
|
|
|
32 data = ''
|
|
|
33 for filename in args.files:
|
|
|
34 with open(filename, 'r') as f:
|
|
|
35 data += f.read()
|
|
|
36 if len(data) != 0 and data[-1] != '\n':
|
|
|
37 data += '\n'
|
|
|
38 assert len(data) > 0 and "cannot cat empty files"
|
|
|
39 with open(args.output, 'w') as f:
|
|
|
40 f.write(data)
|
|
|
41
|
|
|
42
|
|
|
43 if __name__ == '__main__':
|
|
|
44 main()
|
|
|
45 sys.exit(0)
|
