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annotate python/gview.py @ 718:cd9d65e6e2ab

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monkeypatch example
author Jeff Hammel <k0scist@gmail.com>
date Thu, 30 Oct 2014 15:22:29 -0700
parents 5e8d3f68a997
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python
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2 # -*- coding: utf-8 -*-
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3
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4 """
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5 view graphviz files
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6
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7 http://www.graphviz.org/
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8 """
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9
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10 # imports
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11 import argparse
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12 import os
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13 import shlex
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14 import subprocess
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15 import sys
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16 import tempfile
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17
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18 __all__ = ['main']
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19 string = (str, unicode)
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20
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21 class Parser(argparse.ArgumentParser):
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22 """CLI option parser"""
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23 def __init__(self):
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24 argparse.ArgumentParser.__init__(self, description=__doc__)
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25 self.add_argument('input',
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26 help='graphviz file to view')
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27 self.add_argument('-o', '--output', dest='output',
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28 help="path to save to")
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29 self.add_argument('-e', '--program', dest='program',
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30 default='fdp',
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31 help="GraphViz program to invoke [DEFAULT: %(default)s]")
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32 self.add_argument('-v', '--view', dest='viewer', default='feh -F',
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33 help="viewer")
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34
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35
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36 def main(args=sys.argv[1:]):
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37 """CLI"""
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38
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39 # parse command line
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40 parser = Parser()
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41 options = parser.parse_args(args)
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42
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43 #
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44 assert os.path.exists(options.input)
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45 output = options.output or tempfile.mktemp(suffix='.png')
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46
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47 command = [options.program,
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48 options.input,
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49 '-Tpng',
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50 '-o', output]
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51 subprocess.check_call(command)
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52 assert os.path.exists(output)
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53
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54 try:
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55 if options.viewer:
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56 viewer = shlex.split(options.viewer)
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57 subprocess.call(viewer + [output])
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58 finally:
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59 if not options.output:
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60 os.remove(output)
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63 if __name__ == '__main__':
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64 main()
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