Mercurial > hg
view mercurial/fancyopts.py @ 25705:48919d246a47
revset: add function to build dict of positional and keyword arguments
Keyword arguments will be convenient for functions that will take more than
one optional or boolean flags. For example,
file(pattern[, subrepos=false])
subrepo([[pattern], status])
Because I don't think all functions should accept key=value syntax, getkwargs()
does not support variadic functions such as 'ancestor(*changeset)'.
The core logic is placed in the parser module because keyword arguments will
be more useful in the templater, where functions take more options. Test cases
will be added by the next patch.
author | Yuya Nishihara <yuya@tcha.org> |
---|---|
date | Sat, 27 Jun 2015 17:25:01 +0900 |
parents | 69e8384a436c |
children | 6002e2d95e54 |
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# fancyopts.py - better command line parsing # # Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. import getopt import util from i18n import _ def gnugetopt(args, options, longoptions): """Parse options mostly like getopt.gnu_getopt. This is different from getopt.gnu_getopt in that an argument of - will become an argument of - instead of vanishing completely. """ extraargs = [] if '--' in args: stopindex = args.index('--') extraargs = args[stopindex + 1:] args = args[:stopindex] opts, parseargs = getopt.getopt(args, options, longoptions) args = [] while parseargs: arg = parseargs.pop(0) if arg and arg[0] == '-' and len(arg) > 1: parseargs.insert(0, arg) topts, newparseargs = getopt.getopt(parseargs, options, longoptions) opts = opts + topts parseargs = newparseargs else: args.append(arg) args.extend(extraargs) return opts, args def fancyopts(args, options, state, gnu=False): """ read args, parse options, and store options in state each option is a tuple of: short option or '' long option default value description option value label(optional) option types include: boolean or none - option sets variable in state to true string - parameter string is stored in state list - parameter string is added to a list integer - parameter strings is stored as int function - call function with parameter non-option args are returned """ namelist = [] shortlist = '' argmap = {} defmap = {} for option in options: if len(option) == 5: short, name, default, comment, dummy = option else: short, name, default, comment = option # convert opts to getopt format oname = name name = name.replace('-', '_') argmap['-' + short] = argmap['--' + oname] = name defmap[name] = default # copy defaults to state if isinstance(default, list): state[name] = default[:] elif callable(default): state[name] = None else: state[name] = default # does it take a parameter? if not (default is None or default is True or default is False): if short: short += ':' if oname: oname += '=' if short: shortlist += short if name: namelist.append(oname) # parse arguments if gnu: parse = gnugetopt else: parse = getopt.getopt opts, args = parse(args, shortlist, namelist) # transfer result to state for opt, val in opts: name = argmap[opt] obj = defmap[name] t = type(obj) if callable(obj): state[name] = defmap[name](val) elif t is type(1): try: state[name] = int(val) except ValueError: raise util.Abort(_('invalid value %r for option %s, ' 'expected int') % (val, opt)) elif t is type(''): state[name] = val elif t is type([]): state[name].append(val) elif t is type(None) or t is type(False): state[name] = True # return unparsed args return args