1 import sys, textwrap, getopt, re
7 def __setitem__(self, k, v):
10 def __getitem__(self, k):
13 def __getattr__(self, k):
17 def _default_onabort(msg):
22 def __init__(self, exe, optspec, optfunc=getopt.gnu_getopt,
23 onabort=_default_onabort):
25 self.optspec = optspec
26 self._onabort = onabort
27 self.optfunc = optfunc
29 self._shortopts = 'h?'
30 self._longopts = ['help']
32 self._usagestr = self._gen_usage()
36 lines = self.optspec.strip().split('\n')
42 out.append('%s: %s\n' % (first_syn and 'usage' or ' or', l))
48 out.append('\n%s\n' % l.lstrip())
50 (flags, extra) = l.split(' ', 1)
52 if flags.endswith('='):
57 flagl = flags.split(',')
60 self._aliases[f] = flagl[0]
61 self._hasparms[f] = has_parm
63 self._shortopts += f + (has_parm and ':' or '')
64 flagl_nice.append('-' + f)
66 f_nice = re.sub(r'\W', '_', f)
67 self._aliases[f_nice] = flagl[0]
68 assert(not f.startswith('no-')) # supported implicitly
69 self._longopts.append(f + (has_parm and '=' or ''))
70 self._longopts.append('no-' + f)
71 flagl_nice.append('--' + f)
72 flags_nice = ', '.join(flagl_nice)
75 prefix = ' %-20s ' % flags_nice
76 argtext = '\n'.join(textwrap.wrap(extra, width=70,
77 initial_indent=prefix,
78 subsequent_indent=' '*28))
79 out.append(argtext + '\n')
82 return ''.join(out).rstrip() + '\n'
84 def usage(self, msg=""):
85 sys.stderr.write(self._usagestr)
86 e = self._onabort and self._onabort(msg) or None
91 msg = 'error: %s\n' % s
93 return self.usage(msg)
95 def parse(self, args):
97 (flags,extra) = self.optfunc(args, self._shortopts, self._longopts)
98 except getopt.GetoptError, e:
104 if k in ('h', '?', 'help'):
106 if k.startswith('no-'):
107 k = self._aliases[k[3:]]
111 if not self._hasparms[k]:
113 v = (opt._opts.get(k) or 0) + 1
122 for (f1,f2) in self._aliases.iteritems():
123 opt[f1] = opt._opts.get(f2)
124 return (opt,flags,extra)