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comparison cmd2.py @ 38:6d715d7a04fd

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proper exit after -h, -v
author catherine@localhost
date Tue, 20 May 2008 12:54:54 -0400
parents a974e2f44cbe
children 71151157ac7c
comparison
equal deleted inserted replaced
37:a974e2f44cbe 38:6d715d7a04fd
19 flagReader.py options are still supported for backward compatibility 19 flagReader.py options are still supported for backward compatibility
20 """ 20 """
21 import cmd, re, os, sys, optparse, subprocess, tempfile 21 import cmd, re, os, sys, optparse, subprocess, tempfile
22 from optparse import make_option 22 from optparse import make_option
23 23
24 class Option(optparse.Option):
25 # optparse.Option.take_action keeps trying to use sys.exit. That's very rude.
26 # We don't want to exit, we just want to know so we can terminate a particular
27 # function call.
28 def take_action(self, action, dest, opt, value, values, parser):
29 if action == "help":
30 parser.print_help()
31 parser.exit()
32 setattr(values, '_exit', True)
33 elif action == "version":
34 parser.print_version()
35 parser.exit()
36 setattr(values, '_exit', True)
37
38 else:
39 return optparse.Option.take_action(self, action, dest, opt, value, values, parser)
40
41 return 1
42
43 #make_option = Option
44
24 class OptionParser(optparse.OptionParser): 45 class OptionParser(optparse.OptionParser):
25 def exit(self, status=0, msg=None): 46 def exit(self, status=0, msg=None):
47 self.values._exit = True
26 if msg: 48 if msg:
27 print msg 49 print msg
50 # though we must trap and prevent the exit, we also want to end whatever command
51 # was called
28 52
29 def error(self, msg): 53 def error(self, msg):
30 """error(msg : string) 54 """error(msg : string)
31 55
32 Print a usage message incorporating 'msg' to stderr and exit. 56 Print a usage message incorporating 'msg' to stderr and exit.
50 except (optparse.OptionValueError, optparse.BadOptionError, 74 except (optparse.OptionValueError, optparse.BadOptionError,
51 optparse.OptionError, optparse.AmbiguousOptionError, 75 optparse.OptionError, optparse.AmbiguousOptionError,
52 optparse.OptionConflictError), e: 76 optparse.OptionConflictError), e:
53 print e 77 print e
54 optionParser.print_help() 78 optionParser.print_help()
55 return 79 return
80 if hasattr(opts, '_exit'):
81 return None
56 result = func(instance, arg, opts) 82 result = func(instance, arg, opts)
57 return result 83 return result
58 newFunc.__doc__ = '%s\n%s' % (func.__doc__, optionParser.format_help()) 84 newFunc.__doc__ = '%s\n%s' % (func.__doc__, optionParser.format_help())
59 return newFunc 85 return newFunc
60 return option_setup 86 return option_setup