mercurial/fancyopts.py
author Simon Farnsworth <simonfar@fb.com>
Sat, 08 Oct 2016 01:25:28 -0700
changeset 30060 a145161debed
parent 29947 e1f0ec0b7d2d
child 30578 c6ce11f2ee50
permissions -rw-r--r--
merge: use labels in subrepo merge This is the last place that doesn't respect conflict labels in merge output. Teach subrepos to use subrepo merge output too.
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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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from __future__ import absolute_import
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import getopt
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from .i18n import _
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from . import error
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# Set of flags to not apply boolean negation logic on
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nevernegate = set([
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    # avoid --no-noninteractive
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    'noninteractive',
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    # These two flags are special because they cause hg to do one
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    # thing and then exit, and so aren't suitable for use in things
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    # like aliases anyway.
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    'help',
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    'version',
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    ])
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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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    negations = {}
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    alllong = set(o[1] for o in options)
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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 callable(default):
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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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        elif oname not in nevernegate:
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            if oname.startswith('no-'):
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                insert = oname[3:]
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            else:
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                insert = 'no-' + oname
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            # backout (as a practical example) has both --commit and
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            # --no-commit options, so we don't want to allow the
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            # negations of those flags.
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            if insert not in alllong:
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                assert ('--' + oname) not in negations
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                negations['--' + insert] = '--' + oname
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                namelist.append(insert)
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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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        boolval = True
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        negation = negations.get(opt, False)
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        if negation:
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            opt = negation
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            boolval = False
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        name = argmap[opt]
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        obj = defmap[name]
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        t = type(obj)
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        if callable(obj):
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            state[name] = defmap[name](val)
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        elif t is type(1):
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            try:
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                state[name] = int(val)
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            except ValueError:
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                raise error.Abort(_('invalid value %r for option %s, '
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                                   'expected int') % (val, opt))
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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] = boolval
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    # return unparsed args
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    return args