[3] | 1 | # (c) 2005 Ian Bicking and contributors; written for Paste (http://pythonpaste.org) |
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| 2 | # Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php |
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| 3 | """ |
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| 4 | A subclass of ``optparse.OptionParser`` that allows boolean long |
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| 5 | options (like ``--verbose``) to also take arguments (like |
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| 6 | ``--verbose=true``). Arguments *must* use ``=``. |
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| 7 | """ |
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| 8 | |
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| 9 | import optparse |
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| 10 | try: |
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| 11 | _ = optparse._ |
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| 12 | except AttributeError: |
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| 13 | from gettext import gettext as _ |
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| 14 | |
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| 15 | class BoolOptionParser(optparse.OptionParser): |
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| 16 | |
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| 17 | def _process_long_opt(self, rargs, values): |
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| 18 | arg = rargs.pop(0) |
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| 19 | |
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| 20 | # Value explicitly attached to arg? Pretend it's the next |
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| 21 | # argument. |
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| 22 | if "=" in arg: |
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| 23 | (opt, next_arg) = arg.split("=", 1) |
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| 24 | rargs.insert(0, next_arg) |
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| 25 | had_explicit_value = True |
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| 26 | else: |
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| 27 | opt = arg |
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| 28 | had_explicit_value = False |
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| 29 | |
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| 30 | opt = self._match_long_opt(opt) |
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| 31 | option = self._long_opt[opt] |
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| 32 | if option.takes_value(): |
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| 33 | nargs = option.nargs |
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| 34 | if len(rargs) < nargs: |
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| 35 | if nargs == 1: |
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| 36 | self.error(_("%s option requires an argument") % opt) |
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| 37 | else: |
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| 38 | self.error(_("%s option requires %d arguments") |
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| 39 | % (opt, nargs)) |
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| 40 | elif nargs == 1: |
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| 41 | value = rargs.pop(0) |
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| 42 | else: |
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| 43 | value = tuple(rargs[0:nargs]) |
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| 44 | del rargs[0:nargs] |
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| 45 | |
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| 46 | elif had_explicit_value: |
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| 47 | value = rargs[0].lower().strip() |
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| 48 | del rargs[0:1] |
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| 49 | if value in ('true', 'yes', 'on', '1', 'y', 't'): |
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| 50 | value = None |
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| 51 | elif value in ('false', 'no', 'off', '0', 'n', 'f'): |
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| 52 | # Don't process |
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| 53 | return |
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| 54 | else: |
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| 55 | self.error(_('%s option takes a boolean value only (true/false)') % opt) |
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| 56 | |
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| 57 | else: |
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| 58 | value = None |
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| 59 | |
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| 60 | option.process(opt, value, values, self) |
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