mirror of
https://github.com/sshuttle/sshuttle.git
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119 lines
3.9 KiB
Python
119 lines
3.9 KiB
Python
import sys, textwrap, getopt, re
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class OptDict:
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def __init__(self):
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self._opts = {}
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def __setitem__(self, k, v):
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self._opts[k] = v
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def __getitem__(self, k):
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return self._opts[k]
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def __getattr__(self, k):
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return self[k]
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class Options:
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def __init__(self, exe, optspec, optfunc=getopt.gnu_getopt):
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self.exe = exe
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self.optspec = optspec
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self.optfunc = optfunc
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self._aliases = {}
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self._shortopts = 'h?'
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self._longopts = ['help']
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self._hasparms = {}
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self._usagestr = self._gen_usage()
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def _gen_usage(self):
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out = []
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lines = self.optspec.strip().split('\n')
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lines.reverse()
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first_syn = True
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while lines:
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l = lines.pop()
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if l == '--': break
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out.append('%s: %s\n' % (first_syn and 'usage' or ' or', l))
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first_syn = False
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out.append('\n')
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while lines:
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l = lines.pop()
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if l.startswith(' '):
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out.append('\n%s\n' % l.lstrip())
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elif l:
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(flags, extra) = l.split(' ', 1)
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extra = extra.strip()
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if flags.endswith('='):
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flags = flags[:-1]
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has_parm = 1
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else:
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has_parm = 0
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flagl = flags.split(',')
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flagl_nice = []
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for f in flagl:
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f_nice = re.sub(r'\W', '_', f)
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self._aliases[f] = flagl[0]
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self._aliases[f_nice] = flagl[0]
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self._hasparms[f] = has_parm
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if len(f) == 1:
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self._shortopts += f + (has_parm and ':' or '')
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flagl_nice.append('-' + f)
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else:
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assert(not f.startswith('no-')) # supported implicitly
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self._longopts.append(f + (has_parm and '=' or ''))
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self._longopts.append('no-' + f)
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flagl_nice.append('--' + f)
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flags_nice = ', '.join(flagl_nice)
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if has_parm:
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flags_nice += ' ...'
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prefix = ' %-20s ' % flags_nice
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argtext = '\n'.join(textwrap.wrap(extra, width=70,
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initial_indent=prefix,
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subsequent_indent=' '*28))
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out.append(argtext + '\n')
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else:
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out.append('\n')
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return ''.join(out).rstrip() + '\n'
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def usage(self):
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sys.stderr.write(self._usagestr)
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sys.exit(97)
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def fatal(self, s):
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sys.stderr.write('error: %s\n' % s)
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return self.usage()
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def parse(self, args):
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try:
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(flags,extra) = self.optfunc(args, self._shortopts, self._longopts)
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except getopt.GetoptError, e:
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self.fatal(e)
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opt = OptDict()
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for f in self._aliases.values():
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opt[f] = None
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for (k,v) in flags:
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while k.startswith('-'):
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k = k[1:]
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if k in ['h', '?', 'help']:
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self.usage()
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if k.startswith('no-'):
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k = self._aliases[k[3:]]
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opt[k] = None
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else:
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k = self._aliases[k]
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if not self._hasparms[k]:
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assert(v == '')
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opt[k] = (opt._opts.get(k) or 0) + 1
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else:
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try:
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vv = int(v)
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if str(vv) == v:
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v = vv
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except ValueError:
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pass
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opt[k] = v
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for (f1,f2) in self._aliases.items():
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opt[f1] = opt[f2]
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return (opt,flags,extra)
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