Mercurial > hg
annotate mercurial/fancyopts.py @ 50896:b2b8c25f9462
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author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Wed, 30 Aug 2023 13:28:09 +0200 |
parents | 642e31cb55f0 |
children | f4733654f144 |
rev | line source |
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1 # fancyopts.py - better command line parsing |
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2 # |
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3 # Copyright 2005-2009 Olivia Mackall <olivia@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 |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 |
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9 import abc |
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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 b'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 b'help', |
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26 b'version', |
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27 } |
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28 |
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29 |
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30 def _earlyoptarg(arg, shortlist, namelist): |
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31 """Check if the given arg is a valid unabbreviated option |
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32 |
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33 Returns (flag_str, has_embedded_value?, embedded_value, takes_value?) |
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34 |
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35 >>> def opt(arg): |
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36 ... return _earlyoptarg(arg, b'R:q', [b'cwd=', b'debugger']) |
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37 |
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38 long form: |
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39 |
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40 >>> opt(b'--cwd') |
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41 ('--cwd', False, '', True) |
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42 >>> opt(b'--cwd=') |
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43 ('--cwd', True, '', True) |
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44 >>> opt(b'--cwd=foo') |
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45 ('--cwd', True, 'foo', True) |
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46 >>> opt(b'--debugger') |
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47 ('--debugger', False, '', False) |
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48 >>> opt(b'--debugger=') # invalid but parsable |
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49 ('--debugger', True, '', False) |
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50 |
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51 short form: |
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52 |
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53 >>> opt(b'-R') |
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54 ('-R', False, '', True) |
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55 >>> opt(b'-Rfoo') |
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56 ('-R', True, 'foo', True) |
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57 >>> opt(b'-q') |
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58 ('-q', False, '', False) |
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59 >>> opt(b'-qfoo') # invalid but parsable |
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60 ('-q', True, 'foo', False) |
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61 |
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62 unknown or invalid: |
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63 |
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64 >>> opt(b'--unknown') |
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65 ('', False, '', False) |
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66 >>> opt(b'-u') |
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67 ('', False, '', False) |
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68 >>> opt(b'-ufoo') |
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69 ('', False, '', False) |
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70 >>> opt(b'--') |
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71 ('', False, '', False) |
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72 >>> opt(b'-') |
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73 ('', False, '', False) |
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74 >>> opt(b'-:') |
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75 ('', False, '', False) |
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76 >>> opt(b'-:foo') |
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77 ('', False, '', False) |
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78 """ |
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79 if arg.startswith(b'--'): |
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80 flag, eq, val = arg.partition(b'=') |
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81 if flag[2:] in namelist: |
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82 return flag, bool(eq), val, False |
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83 if flag[2:] + b'=' in namelist: |
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84 return flag, bool(eq), val, True |
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85 elif arg.startswith(b'-') and arg != b'-' and not arg.startswith(b'-:'): |
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86 flag, val = arg[:2], arg[2:] |
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87 i = shortlist.find(flag[1:]) |
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88 if i >= 0: |
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89 return flag, bool(val), val, shortlist.startswith(b':', i + 1) |
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90 return b'', False, b'', False |
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91 |
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92 |
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93 def earlygetopt(args, shortlist, namelist, gnu=False, keepsep=False): |
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94 """Parse options like getopt, but ignores unknown options and abbreviated |
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95 forms |
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96 |
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97 If gnu=False, this stops processing options as soon as a non/unknown-option |
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98 argument is encountered. Otherwise, option and non-option arguments may be |
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99 intermixed, and unknown-option arguments are taken as non-option. |
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100 |
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101 If keepsep=True, '--' won't be removed from the list of arguments left. |
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102 This is useful for stripping early options from a full command arguments. |
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103 |
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104 >>> def get(args, gnu=False, keepsep=False): |
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105 ... return earlygetopt(args, b'R:q', [b'cwd=', b'debugger'], |
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106 ... gnu=gnu, keepsep=keepsep) |
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107 |
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108 default parsing rules for early options: |
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109 |
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110 >>> get([b'x', b'--cwd', b'foo', b'-Rbar', b'-q', b'y'], gnu=True) |
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111 ([('--cwd', 'foo'), ('-R', 'bar'), ('-q', '')], ['x', 'y']) |
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112 >>> get([b'x', b'--cwd=foo', b'y', b'-R', b'bar', b'--debugger'], gnu=True) |
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113 ([('--cwd', 'foo'), ('-R', 'bar'), ('--debugger', '')], ['x', 'y']) |
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114 >>> get([b'--unknown', b'--cwd=foo', b'--', '--debugger'], gnu=True) |
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115 ([('--cwd', 'foo')], ['--unknown', '--debugger']) |
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116 |
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117 restricted parsing rules (early options must come first): |
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118 |
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119 >>> get([b'--cwd', b'foo', b'-Rbar', b'x', b'-q', b'y'], gnu=False) |
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120 ([('--cwd', 'foo'), ('-R', 'bar')], ['x', '-q', 'y']) |
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121 >>> get([b'--cwd=foo', b'x', b'y', b'-R', b'bar', b'--debugger'], gnu=False) |
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122 ([('--cwd', 'foo')], ['x', 'y', '-R', 'bar', '--debugger']) |
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123 >>> get([b'--unknown', b'--cwd=foo', b'--', '--debugger'], gnu=False) |
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124 ([], ['--unknown', '--cwd=foo', '--', '--debugger']) |
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125 |
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126 stripping early options (without loosing '--'): |
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127 |
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128 >>> get([b'x', b'-Rbar', b'--', '--debugger'], gnu=True, keepsep=True)[1] |
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129 ['x', '--', '--debugger'] |
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130 |
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131 last argument: |
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132 |
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133 >>> get([b'--cwd']) |
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134 ([], ['--cwd']) |
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135 >>> get([b'--cwd=foo']) |
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136 ([('--cwd', 'foo')], []) |
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137 >>> get([b'-R']) |
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138 ([], ['-R']) |
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139 >>> get([b'-Rbar']) |
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140 ([('-R', 'bar')], []) |
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141 >>> get([b'-q']) |
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142 ([('-q', '')], []) |
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143 >>> get([b'-q', b'--']) |
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144 ([('-q', '')], []) |
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145 |
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146 '--' may be a value: |
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147 |
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148 >>> get([b'-R', b'--', b'x']) |
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149 ([('-R', '--')], ['x']) |
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150 >>> get([b'--cwd', b'--', b'x']) |
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151 ([('--cwd', '--')], ['x']) |
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152 |
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153 value passed to bool options: |
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154 |
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155 >>> get([b'--debugger=foo', b'x']) |
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156 ([], ['--debugger=foo', 'x']) |
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157 >>> get([b'-qfoo', b'x']) |
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158 ([], ['-qfoo', 'x']) |
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159 |
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160 short option isn't separated with '=': |
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161 |
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162 >>> get([b'-R=bar']) |
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163 ([('-R', '=bar')], []) |
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164 |
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165 ':' may be in shortlist, but shouldn't be taken as an option letter: |
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166 |
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167 >>> get([b'-:', b'y']) |
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168 ([], ['-:', 'y']) |
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169 |
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170 '-' is a valid non-option argument: |
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171 |
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172 >>> get([b'-', b'y']) |
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173 ([], ['-', 'y']) |
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174 """ |
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175 parsedopts = [] |
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176 parsedargs = [] |
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177 pos = 0 |
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178 while pos < len(args): |
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179 arg = args[pos] |
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180 if arg == b'--': |
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181 pos += not keepsep |
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182 break |
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183 flag, hasval, val, takeval = _earlyoptarg(arg, shortlist, namelist) |
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184 if not hasval and takeval and pos + 1 >= len(args): |
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185 # missing last argument |
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186 break |
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187 if not flag or hasval and not takeval: |
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188 # non-option argument or -b/--bool=INVALID_VALUE |
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189 if gnu: |
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190 parsedargs.append(arg) |
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191 pos += 1 |
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192 else: |
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193 break |
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194 elif hasval == takeval: |
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195 # -b/--bool or -s/--str=VALUE |
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196 parsedopts.append((flag, val)) |
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197 pos += 1 |
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198 else: |
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199 # -s/--str VALUE |
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200 parsedopts.append((flag, args[pos + 1])) |
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201 pos += 2 |
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202 |
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203 parsedargs.extend(args[pos:]) |
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204 return parsedopts, parsedargs |
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205 |
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206 |
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207 class customopt: # pytype: disable=ignored-metaclass |
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208 """Manage defaults and mutations for any type of opt.""" |
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209 |
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210 __metaclass__ = abc.ABCMeta |
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211 |
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212 def __init__(self, defaultvalue): |
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213 self._defaultvalue = defaultvalue |
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214 |
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215 def _isboolopt(self): |
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216 return False |
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217 |
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218 def getdefaultvalue(self): |
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219 """Returns the default value for this opt. |
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220 |
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221 Subclasses should override this to return a new value if the value type |
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222 is mutable.""" |
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223 return self._defaultvalue |
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224 |
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225 @abc.abstractmethod |
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226 def newstate(self, oldstate, newparam, abort): |
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227 """Adds newparam to oldstate and returns the new state. |
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228 |
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229 On failure, abort can be called with a string error message.""" |
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230 |
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231 |
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232 class _simpleopt(customopt): |
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233 def _isboolopt(self): |
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234 return isinstance(self._defaultvalue, (bool, type(None))) |
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235 |
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236 def newstate(self, oldstate, newparam, abort): |
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237 return newparam |
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238 |
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239 |
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240 class _callableopt(customopt): |
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241 def __init__(self, callablefn): |
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242 self.callablefn = callablefn |
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243 super(_callableopt, self).__init__(None) |
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244 |
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245 def newstate(self, oldstate, newparam, abort): |
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246 return self.callablefn(newparam) |
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247 |
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248 |
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249 class _listopt(customopt): |
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250 def getdefaultvalue(self): |
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251 return self._defaultvalue[:] |
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252 |
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253 def newstate(self, oldstate, newparam, abort): |
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254 oldstate.append(newparam) |
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255 return oldstate |
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256 |
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257 |
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258 class _intopt(customopt): |
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259 def newstate(self, oldstate, newparam, abort): |
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260 try: |
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261 return int(newparam) |
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262 except ValueError: |
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263 abort(_(b'expected int')) |
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264 |
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265 |
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266 def _defaultopt(default): |
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267 """Returns a default opt implementation, given a default value.""" |
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268 |
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269 if isinstance(default, customopt): |
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270 return default |
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271 elif callable(default): |
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272 return _callableopt(default) |
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273 elif isinstance(default, list): |
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274 return _listopt(default[:]) |
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275 elif type(default) is type(1): |
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276 return _intopt(default) |
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277 else: |
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278 return _simpleopt(default) |
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279 |
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280 |
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281 def fancyopts(args, options, state, gnu=False, early=False, optaliases=None): |
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282 """ |
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283 read args, parse options, and store options in state |
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284 |
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285 each option is a tuple of: |
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286 |
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287 short option or '' |
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288 long option |
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289 default value |
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290 description |
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291 option value label(optional) |
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292 |
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293 option types include: |
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294 |
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295 boolean or none - option sets variable in state to true |
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296 string - parameter string is stored in state |
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297 list - parameter string is added to a list |
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298 integer - parameter strings is stored as int |
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299 function - call function with parameter |
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300 customopt - subclass of 'customopt' |
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301 |
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302 optaliases is a mapping from a canonical option name to a list of |
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303 additional long options. This exists for preserving backward compatibility |
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304 of early options. If we want to use it extensively, please consider moving |
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305 the functionality to the options table (e.g separate long options by '|'.) |
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306 |
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307 non-option args are returned |
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308 """ |
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309 if optaliases is None: |
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310 optaliases = {} |
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311 namelist = [] |
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312 shortlist = b'' |
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313 argmap = {} |
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314 defmap = {} |
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315 negations = {} |
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316 alllong = {o[1] for o in options} |
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317 |
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318 for option in options: |
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319 if len(option) == 5: |
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320 short, name, default, comment, dummy = option |
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321 else: |
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322 short, name, default, comment = option |
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323 # convert opts to getopt format |
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324 onames = [name] |
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325 onames.extend(optaliases.get(name, [])) |
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326 name = name.replace(b'-', b'_') |
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327 |
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328 argmap[b'-' + short] = name |
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329 for n in onames: |
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330 argmap[b'--' + n] = name |
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331 defmap[name] = _defaultopt(default) |
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332 |
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333 # copy defaults to state |
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334 state[name] = defmap[name].getdefaultvalue() |
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335 |
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336 # does it take a parameter? |
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337 if not defmap[name]._isboolopt(): |
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338 if short: |
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339 short += b':' |
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340 onames = [n + b'=' for n in onames] |
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341 elif name not in nevernegate: |
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342 for n in onames: |
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343 if n.startswith(b'no-'): |
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344 insert = n[3:] |
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345 else: |
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346 insert = b'no-' + n |
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347 # backout (as a practical example) has both --commit and |
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348 # --no-commit options, so we don't want to allow the |
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349 # negations of those flags. |
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350 if insert not in alllong: |
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351 assert (b'--' + n) not in negations |
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352 negations[b'--' + insert] = b'--' + n |
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353 namelist.append(insert) |
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354 if short: |
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355 shortlist += short |
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356 if name: |
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357 namelist.extend(onames) |
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358 |
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359 # parse arguments |
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360 if early: |
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361 parse = functools.partial(earlygetopt, gnu=gnu) |
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362 elif gnu: |
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363 parse = pycompat.gnugetoptb |
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364 else: |
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365 parse = pycompat.getoptb |
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366 opts, args = parse(args, shortlist, namelist) |
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367 |
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368 # transfer result to state |
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369 for opt, val in opts: |
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370 boolval = True |
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371 negation = negations.get(opt, False) |
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372 if negation: |
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373 opt = negation |
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374 boolval = False |
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375 name = argmap[opt] |
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376 obj = defmap[name] |
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377 if obj._isboolopt(): |
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378 state[name] = boolval |
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379 else: |
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380 |
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381 def abort(s): |
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382 raise error.InputError( |
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383 _(b'invalid value %r for option %s, %s') |
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384 % (pycompat.maybebytestr(val), opt, s) |
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385 ) |
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386 |
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387 state[name] = defmap[name].newstate(state[name], val, abort) |
209 | 388 |
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389 # return unparsed args |
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390 return args |