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annotate mercurial/fancyopts.py @ 35235:5b569d512fbd

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fancyopts: use getopt.gnu_getopt() The issue described in the docstring has been fixed since Python 20ab2260dc93, which is in 2.7. https://hg.python.org/cpython/rev/20ab2260dc93 https://bugs.python.org/issue4458 This fixes the handling of '--' value.
author Yuya Nishihara <yuya@tcha.org>
date Fri, 24 Nov 2017 01:09:00 +0900
parents 4edd2202f7d7
children 98a5aa5575e7
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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 or any later version.
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7
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8 from __future__ import absolute_import
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9
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10 import functools
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11
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12 from .i18n import _
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13 from . import (
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14 error,
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15 pycompat,
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16 )
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17
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18 # Set of flags to not apply boolean negation logic on
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19 nevernegate = {
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20 # avoid --no-noninteractive
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21 'noninteractive',
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22 # These two flags are special because they cause hg to do one
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23 # thing and then exit, and so aren't suitable for use in things
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24 # like aliases anyway.
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25 'help',
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26 'version',
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27 }
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28
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29 def _earlyoptarg(arg, shortlist, namelist):
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30 """Check if the given arg is a valid unabbreviated option
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31
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32 Returns (flag_str, has_embedded_value?, embedded_value, takes_value?)
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33
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34 >>> def opt(arg):
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35 ... return _earlyoptarg(arg, b'R:q', [b'cwd=', b'debugger'])
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36
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37 long form:
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38
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39 >>> opt(b'--cwd')
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40 ('--cwd', False, '', True)
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41 >>> opt(b'--cwd=')
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42 ('--cwd', True, '', True)
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43 >>> opt(b'--cwd=foo')
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44 ('--cwd', True, 'foo', True)
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45 >>> opt(b'--debugger')
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46 ('--debugger', False, '', False)
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47 >>> opt(b'--debugger=') # invalid but parsable
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48 ('--debugger', True, '', False)
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49
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50 short form:
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51
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52 >>> opt(b'-R')
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53 ('-R', False, '', True)
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54 >>> opt(b'-Rfoo')
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55 ('-R', True, 'foo', True)
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56 >>> opt(b'-q')
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57 ('-q', False, '', False)
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58 >>> opt(b'-qfoo') # invalid but parsable
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59 ('-q', True, 'foo', False)
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60
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61 unknown or invalid:
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62
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63 >>> opt(b'--unknown')
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64 ('', False, '', False)
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65 >>> opt(b'-u')
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66 ('', False, '', False)
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67 >>> opt(b'-ufoo')
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68 ('', False, '', False)
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69 >>> opt(b'--')
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70 ('', False, '', False)
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71 >>> opt(b'-')
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72 ('', False, '', False)
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73 >>> opt(b'-:')
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74 ('', False, '', False)
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75 >>> opt(b'-:foo')
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76 ('', False, '', False)
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77 """
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78 if arg.startswith('--'):
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79 flag, eq, val = arg.partition('=')
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80 if flag[2:] in namelist:
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81 return flag, bool(eq), val, False
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82 if flag[2:] + '=' in namelist:
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83 return flag, bool(eq), val, True
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84 elif arg.startswith('-') and arg != '-' and not arg.startswith('-:'):
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85 flag, val = arg[:2], arg[2:]
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86 i = shortlist.find(flag[1:])
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87 if i >= 0:
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88 return flag, bool(val), val, shortlist.startswith(':', i + 1)
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89 return '', False, '', False
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90
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91 def earlygetopt(args, shortlist, namelist, gnu=False, keepsep=False):
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92 """Parse options like getopt, but ignores unknown options and abbreviated
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93 forms
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94
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95 If gnu=False, this stops processing options as soon as a non/unknown-option
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96 argument is encountered. Otherwise, option and non-option arguments may be
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97 intermixed, and unknown-option arguments are taken as non-option.
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98
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99 If keepsep=True, '--' won't be removed from the list of arguments left.
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100 This is useful for stripping early options from a full command arguments.
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101
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102 >>> def get(args, gnu=False, keepsep=False):
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103 ... return earlygetopt(args, b'R:q', [b'cwd=', b'debugger'],
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104 ... gnu=gnu, keepsep=keepsep)
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105
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106 default parsing rules for early options:
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107
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108 >>> get([b'x', b'--cwd', b'foo', b'-Rbar', b'-q', b'y'], gnu=True)
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109 ([('--cwd', 'foo'), ('-R', 'bar'), ('-q', '')], ['x', 'y'])
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110 >>> get([b'x', b'--cwd=foo', b'y', b'-R', b'bar', b'--debugger'], gnu=True)
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111 ([('--cwd', 'foo'), ('-R', 'bar'), ('--debugger', '')], ['x', 'y'])
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112 >>> get([b'--unknown', b'--cwd=foo', b'--', '--debugger'], gnu=True)
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113 ([('--cwd', 'foo')], ['--unknown', '--debugger'])
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114
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115 restricted parsing rules (early options must come first):
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116
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117 >>> get([b'--cwd', b'foo', b'-Rbar', b'x', b'-q', b'y'], gnu=False)
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118 ([('--cwd', 'foo'), ('-R', 'bar')], ['x', '-q', 'y'])
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119 >>> get([b'--cwd=foo', b'x', b'y', b'-R', b'bar', b'--debugger'], gnu=False)
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120 ([('--cwd', 'foo')], ['x', 'y', '-R', 'bar', '--debugger'])
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121 >>> get([b'--unknown', b'--cwd=foo', b'--', '--debugger'], gnu=False)
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122 ([], ['--unknown', '--cwd=foo', '--debugger'])
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123
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124 stripping early options (without loosing '--'):
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125
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126 >>> get([b'x', b'-Rbar', b'--', '--debugger'], gnu=True, keepsep=True)[1]
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127 ['x', '--', '--debugger']
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128
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129 last argument:
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130
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131 >>> get([b'--cwd'])
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132 ([], ['--cwd'])
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133 >>> get([b'--cwd=foo'])
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134 ([('--cwd', 'foo')], [])
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135 >>> get([b'-R'])
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136 ([], ['-R'])
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137 >>> get([b'-Rbar'])
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138 ([('-R', 'bar')], [])
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139 >>> get([b'-q'])
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140 ([('-q', '')], [])
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141 >>> get([b'-q', b'--'])
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142 ([('-q', '')], [])
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143
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144 value passed to bool options:
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145
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146 >>> get([b'--debugger=foo', b'x'])
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147 ([], ['--debugger=foo', 'x'])
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148 >>> get([b'-qfoo', b'x'])
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149 ([], ['-qfoo', 'x'])
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150
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151 short option isn't separated with '=':
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152
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153 >>> get([b'-R=bar'])
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154 ([('-R', '=bar')], [])
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155
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156 ':' may be in shortlist, but shouldn't be taken as an option letter:
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157
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158 >>> get([b'-:', b'y'])
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159 ([], ['-:', 'y'])
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160
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161 '-' is a valid non-option argument:
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162
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163 >>> get([b'-', b'y'])
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164 ([], ['-', 'y'])
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165 """
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166 # ignoring everything just after '--' isn't correct as '--' may be an
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167 # option value (e.g. ['-R', '--']), but we do that consistently.
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168 try:
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169 argcount = args.index('--')
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170 except ValueError:
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171 argcount = len(args)
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172
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173 parsedopts = []
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174 parsedargs = []
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175 pos = 0
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176 while pos < argcount:
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177 arg = args[pos]
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178 flag, hasval, val, takeval = _earlyoptarg(arg, shortlist, namelist)
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179 if not hasval and takeval and pos + 1 >= argcount:
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180 # missing last argument
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181 break
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182 if not flag or hasval and not takeval:
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183 # non-option argument or -b/--bool=INVALID_VALUE
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184 if gnu:
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185 parsedargs.append(arg)
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186 pos += 1
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187 else:
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188 break
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189 elif hasval == takeval:
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190 # -b/--bool or -s/--str=VALUE
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191 parsedopts.append((flag, val))
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192 pos += 1
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193 else:
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194 # -s/--str VALUE
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195 parsedopts.append((flag, args[pos + 1]))
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196 pos += 2
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197
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198 parsedargs.extend(args[pos:argcount])
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199 parsedargs.extend(args[argcount + (not keepsep):])
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200 return parsedopts, parsedargs
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201
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202 def fancyopts(args, options, state, gnu=False, early=False, optaliases=None):
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203 """
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204 read args, parse options, and store options in state
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205
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206 each option is a tuple of:
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207
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208 short option or ''
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209 long option
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210 default value
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211 description
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212 option value label(optional)
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213
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214 option types include:
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215
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216 boolean or none - option sets variable in state to true
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217 string - parameter string is stored in state
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218 list - parameter string is added to a list
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219 integer - parameter strings is stored as int
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220 function - call function with parameter
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221
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222 optaliases is a mapping from a canonical option name to a list of
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223 additional long options. This exists for preserving backward compatibility
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224 of early options. If we want to use it extensively, please consider moving
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225 the functionality to the options table (e.g separate long options by '|'.)
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226
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227 non-option args are returned
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228 """
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229 if optaliases is None:
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230 optaliases = {}
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231 namelist = []
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232 shortlist = ''
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233 argmap = {}
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234 defmap = {}
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235 negations = {}
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236 alllong = set(o[1] for o in options)
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237
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238 for option in options:
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239 if len(option) == 5:
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240 short, name, default, comment, dummy = option
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241 else:
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242 short, name, default, comment = option
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243 # convert opts to getopt format
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244 onames = [name]
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245 onames.extend(optaliases.get(name, []))
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246 name = name.replace('-', '_')
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247
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248 argmap['-' + short] = name
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249 for n in onames:
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250 argmap['--' + n] = name
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251 defmap[name] = default
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252
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253 # copy defaults to state
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254 if isinstance(default, list):
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255 state[name] = default[:]
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256 elif callable(default):
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257 state[name] = None
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258 else:
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259 state[name] = default
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260
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261 # does it take a parameter?
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262 if not (default is None or default is True or default is False):
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263 if short:
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264 short += ':'
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265 onames = [n + '=' for n in onames]
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266 elif name not in nevernegate:
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267 for n in onames:
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268 if n.startswith('no-'):
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269 insert = n[3:]
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270 else:
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271 insert = 'no-' + n
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272 # backout (as a practical example) has both --commit and
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273 # --no-commit options, so we don't want to allow the
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274 # negations of those flags.
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275 if insert not in alllong:
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276 assert ('--' + n) not in negations
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277 negations['--' + insert] = '--' + n
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278 namelist.append(insert)
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279 if short:
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280 shortlist += short
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281 if name:
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282 namelist.extend(onames)
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283
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284 # parse arguments
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285 if early:
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286 parse = functools.partial(earlygetopt, gnu=gnu)
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287 elif gnu:
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288 parse = pycompat.gnugetoptb
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289 else:
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290 parse = pycompat.getoptb
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291 opts, args = parse(args, shortlist, namelist)
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292
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293 # transfer result to state
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294 for opt, val in opts:
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295 boolval = True
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296 negation = negations.get(opt, False)
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297 if negation:
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298 opt = negation
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299 boolval = False
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300 name = argmap[opt]
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301 obj = defmap[name]
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302 t = type(obj)
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303 if callable(obj):
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304 state[name] = defmap[name](val)
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305 elif t is type(1):
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306 try:
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307 state[name] = int(val)
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308 except ValueError:
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309 raise error.Abort(_('invalid value %r for option %s, '
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310 'expected int') % (val, opt))
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311 elif t is type(''):
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312 state[name] = val
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313 elif t is type([]):
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314 state[name].append(val)
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315 elif t is type(None) or t is type(False):
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316 state[name] = boolval
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317
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318 # return unparsed args
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319 return args