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1 # fancyopts.py - better command line parsing
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2 #
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3 # Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2, incorporated herein by reference.
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7
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8 import getopt
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9
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10 def gnugetopt(args, options, longoptions):
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11 """Parse options mostly like getopt.gnu_getopt.
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12
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13 This is different from getopt.gnu_getopt in that an argument of - will
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14 become an argument of - instead of vanishing completely.
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15 """
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16 extraargs = []
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17 if '--' in args:
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18 stopindex = args.index('--')
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19 extraargs = args[stopindex+1:]
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20 args = args[:stopindex]
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21 opts, parseargs = getopt.getopt(args, options, longoptions)
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22 args = []
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23 while parseargs:
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24 arg = parseargs.pop(0)
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25 if arg and arg[0] == '-' and len(arg) > 1:
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26 parseargs.insert(0, arg)
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27 topts, newparseargs = getopt.getopt(parseargs, options, longoptions)
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28 opts = opts + topts
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29 parseargs = newparseargs
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30 else:
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31 args.append(arg)
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32 args.extend(extraargs)
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33 return opts, args
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34
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35
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36 def fancyopts(args, options, state, gnu=False):
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37 """
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38 read args, parse options, and store options in state
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39
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40 each option is a tuple of:
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41
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42 short option or ''
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43 long option
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44 default value
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45 description
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46
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47 option types include:
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48
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49 boolean or none - option sets variable in state to true
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50 string - parameter string is stored in state
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51 list - parameter string is added to a list
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52 integer - parameter strings is stored as int
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53 function - call function with parameter
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54
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55 non-option args are returned
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56 """
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57 namelist = []
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58 shortlist = ''
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59 argmap = {}
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60 defmap = {}
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61
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62 for short, name, default, comment in options:
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63 # convert opts to getopt format
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64 oname = name
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65 name = name.replace('-', '_')
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66
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67 argmap['-' + short] = argmap['--' + oname] = name
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68 defmap[name] = default
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69
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70 # copy defaults to state
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71 if isinstance(default, list):
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72 state[name] = default[:]
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73 elif hasattr(default, '__call__'):
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74 state[name] = None
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75 else:
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76 state[name] = default
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77
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78 # does it take a parameter?
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79 if not (default is None or default is True or default is False):
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80 if short: short += ':'
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81 if oname: oname += '='
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82 if short:
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83 shortlist += short
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84 if name:
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85 namelist.append(oname)
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86
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87 # parse arguments
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88 if gnu:
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89 parse = gnugetopt
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90 else:
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91 parse = getopt.getopt
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92 opts, args = parse(args, shortlist, namelist)
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93
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94 # transfer result to state
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95 for opt, val in opts:
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96 name = argmap[opt]
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97 t = type(defmap[name])
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98 if t is type(fancyopts):
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99 state[name] = defmap[name](val)
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100 elif t is type(1):
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101 state[name] = int(val)
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102 elif t is type(''):
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103 state[name] = val
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104 elif t is type([]):
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105 state[name].append(val)
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106 elif t is type(None) or t is type(False):
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107 state[name] = True
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108
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109 # return unparsed args
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110 return args
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