author | Martin Geisler <mg@lazybytes.net> |
Sun, 21 Jun 2009 19:27:09 +0200 | |
changeset 8918 | c9a01a7798d8 |
parent 8366 | 0bf0045000b5 |
child 10263 | 25e572394f5c |
permissions | -rw-r--r-- |
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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, incorporated herein by reference. |
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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 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 short, name, default, comment in options: |
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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: short += ':' |
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if oname: 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 |