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[gpg] make a front-end to add a line to a gpg symmetrically encrypted file
author Jeff Hammel <k0scist@gmail.com>
date Tue, 17 Oct 2017 11:59:09 -0700
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children a3ee050ae568
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6c918c07d0e3 [gpg] make a front-end to add a line to a gpg symmetrically encrypted file
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1 #!/usr/bin/env python
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2
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3 """
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4 add a line to a gpg file; requires `gpg` on your path
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5 """
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6
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7 import argparse
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8 import os
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9 import shutil
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10 import subprocess
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11 import sys
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12 import tempfile
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13
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14
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15 def main(args=sys.argv[1:]):
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16 """CLI"""
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17
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18 parser = argparse.ArgumentParser(description=__doc__)
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19 parser.add_argument('file', help="path to GPG file")
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20 parser.add_argument('line', help='line to add + encrypt')
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21 options = parser.parse_args(args)
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22
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23 if not os.path.isfile(options.file):
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24 parser.error("Not a file: '{}'".format(options.file))
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25
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26 tmpdir = tempfile.mkdtemp()
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27 try:
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28 # decrypt the file
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29 outfile = os.path.join(tmpdir, options.file + '.decrypted')
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30 subprocess.check_call(['gpg', '--output', outfile, '--decrypt', options.file])
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31 assert os.path.exists(outfile)
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32
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33 # read lines
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34 with open(outfile) as f:
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35 lines = f.read().strip().splitlines()
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36
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37 # write the file
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38 lines.append(options.line)
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39 with open(outfile, 'w') as f:
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40 f.write('\n'.join(lines))
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41
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42 # encrypt
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43 subprocess.check_call(['gpg', '--output', options.file, '--symmetric', outfile])
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44 finally:
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45 shutil.rmtree(tmpdir, ignore_errors=True)
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46
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47 if __name__ == '__main__':
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48 main()