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# fancyopts.py - better command line parsing
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#
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# Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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import getopt
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def gnugetopt(args, options, longoptions):
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"""Parse options mostly like getopt.gnu_getopt.
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This is different from getopt.gnu_getopt in that an argument of - will
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become an argument of - instead of vanishing completely.
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"""
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extraargs = []
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if '--' in args:
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stopindex = args.index('--')
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extraargs = args[stopindex + 1:]
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args = args[:stopindex]
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opts, parseargs = getopt.getopt(args, options, longoptions)
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args = []
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while parseargs:
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arg = parseargs.pop(0)
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if arg and arg[0] == '-' and len(arg) > 1:
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parseargs.insert(0, arg)
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topts, newparseargs = getopt.getopt(parseargs, options, longoptions)
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opts = opts + topts
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parseargs = newparseargs
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else:
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args.append(arg)
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args.extend(extraargs)
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return opts, args
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def fancyopts(args, options, state, gnu=False):
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"""
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read args, parse options, and store options in state
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each option is a tuple of:
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short option or ''
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long option
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default value
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description
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option value label(optional)
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option types include:
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boolean or none - option sets variable in state to true
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string - parameter string is stored in state
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list - parameter string is added to a list
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integer - parameter strings is stored as int
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function - call function with parameter
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non-option args are returned
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"""
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namelist = []
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shortlist = ''
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argmap = {}
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defmap = {}
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for option in options:
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if len(option) == 5:
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short, name, default, comment, dummy = option
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else:
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short, name, default, comment = option
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# convert opts to getopt format
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oname = name
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name = name.replace('-', '_')
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argmap['-' + short] = argmap['--' + oname] = name
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defmap[name] = default
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# copy defaults to state
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if isinstance(default, list):
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state[name] = default[:]
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elif hasattr(default, '__call__'):
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state[name] = None
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else:
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state[name] = default
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# does it take a parameter?
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if not (default is None or default is True or default is False):
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if short:
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short += ':'
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if oname:
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oname += '='
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if short:
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shortlist += short
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if name:
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namelist.append(oname)
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# parse arguments
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if gnu:
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parse = gnugetopt
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else:
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parse = getopt.getopt
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opts, args = parse(args, shortlist, namelist)
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# transfer result to state
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for opt, val in opts:
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name = argmap[opt]
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t = type(defmap[name])
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if t is type(fancyopts):
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state[name] = defmap[name](val)
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elif t is type(1):
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state[name] = int(val)
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elif t is type(''):
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state[name] = val
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elif t is type([]):
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state[name].append(val)
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elif t is type(None) or t is type(False):
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state[name] = True
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# return unparsed args
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return args
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