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47 lines
1.3 KiB
Python
47 lines
1.3 KiB
Python
#!/usr/bin/env python
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#===----------------------------------------------------------------------===##
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#
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# The LLVM Compiler Infrastructure
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#
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# This file is dual licensed under the MIT and the University of Illinois Open
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# Source Licenses. See LICENSE.TXT for details.
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#
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#===----------------------------------------------------------------------===##
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from argparse import ArgumentParser
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import sys
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def print_and_exit(msg):
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sys.stderr.write(msg + '\n')
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sys.exit(1)
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def main():
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parser = ArgumentParser(
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description="Concatenate two files into a single file")
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parser.add_argument(
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'-o', '--output', dest='output', required=True,
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help='The output file. stdout is used if not given',
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type=str, action='store')
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parser.add_argument(
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'files', metavar='files', nargs='+',
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help='The files to concatenate')
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args = parser.parse_args()
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if len(args.files) < 2:
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print_and_exit('fewer than 2 inputs provided')
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data = ''
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for filename in args.files:
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with open(filename, 'r') as f:
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data += f.read()
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if len(data) != 0 and data[-1] != '\n':
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data += '\n'
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assert len(data) > 0 and "cannot cat empty files"
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with open(args.output, 'w') as f:
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f.write(data)
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if __name__ == '__main__':
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main()
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sys.exit(0)
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