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hghave: detect FIFO availability
author Patrick Mezard <pmezard@gmail.com>
date Mon, 06 Aug 2007 09:57:23 +0200
parents c51c9bc4579d
children 7e2385a31933
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1 #!/usr/bin/env python
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2 """Test the running system for features availability. Exit with zero
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3 if all features are there, non-zero otherwise.
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4 """
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5 import optparse
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6 import os
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7 import sys
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8
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9 def has_symlink():
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10 return hasattr(os, "symlink")
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11
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12 def has_fifo():
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13 return hasattr(os, "mkfifo")
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14
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15 checks = {
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16 "symlink": (has_symlink, "symbolic links"),
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17 "fifo": (has_fifo, "named pipes"),
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18 }
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19
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20 def list_features():
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21 for name, feature in checks.iteritems():
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22 desc = feature[1]
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23 print name + ':', desc
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24
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25 parser = optparse.OptionParser("%prog [options] [features]")
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26 parser.add_option("--list-features", action="store_true",
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27 help="list available features")
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28 parser.add_option("-q", "--quiet", action="store_true",
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29 help="check features silently")
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30
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31 if __name__ == '__main__':
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32 options, args = parser.parse_args()
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33 if options.list_features:
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34 list_features()
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35 sys.exit(0)
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36
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37 quiet = options.quiet
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38
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39 failures = 0
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40
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41 def error(msg):
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42 global failures
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43 if not quiet:
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44 sys.stderr.write(msg + '\n')
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45 failures += 1
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46
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47 for feature in args:
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48 if feature not in checks:
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49 error('hghave: unknown feature: ' + feature)
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50 continue
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51
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52 check, desc = checks[feature]
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53 if not check():
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54 error('hghave: missing feature: ' + desc)
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55
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56 if failures != 0:
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57 sys.exit(1)
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58
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