46 lines
1.3 KiB
Python
Executable File
46 lines
1.3 KiB
Python
Executable File
#!/usr/bin/env python
|
|
#===----------------------------------------------------------------------===##
|
|
#
|
|
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
# See https://llvm.org/LICENSE.txt for license information.
|
|
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
#
|
|
#===----------------------------------------------------------------------===##
|
|
|
|
from argparse import ArgumentParser
|
|
import sys
|
|
|
|
def print_and_exit(msg):
|
|
sys.stderr.write(msg + '\n')
|
|
sys.exit(1)
|
|
|
|
def main():
|
|
parser = ArgumentParser(
|
|
description="Concatenate two files into a single file")
|
|
parser.add_argument(
|
|
'-o', '--output', dest='output', required=True,
|
|
help='The output file. stdout is used if not given',
|
|
type=str, action='store')
|
|
parser.add_argument(
|
|
'files', metavar='files', nargs='+',
|
|
help='The files to concatenate')
|
|
|
|
args = parser.parse_args()
|
|
|
|
if len(args.files) < 2:
|
|
print_and_exit('fewer than 2 inputs provided')
|
|
data = ''
|
|
for filename in args.files:
|
|
with open(filename, 'r') as f:
|
|
data += f.read()
|
|
if len(data) != 0 and data[-1] != '\n':
|
|
data += '\n'
|
|
assert len(data) > 0 and "cannot cat empty files"
|
|
with open(args.output, 'w') as f:
|
|
f.write(data)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|
|
sys.exit(0)
|