Mercurial > hg
annotate mercurial/fancyopts.py @ 46858:85e3a630cad9
revlog: move the details of revlog "v2" index inside revlog.utils.constants
the revlog module is quite large and this kind of format information would handy
for other module. So let us start to gather this information about the format in
a more appropriate place.
We update various reference to this information to use the new "source of truth"
in the process.
Differential Revision: https://phab.mercurial-scm.org/D10305
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Mon, 05 Apr 2021 12:21:12 +0200 |
parents | d4ba4d51f85f |
children | 6000f5b25c9b |
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 from __future__ import absolute_import |
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9 |
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10 import abc |
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11 import functools |
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12 |
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13 from .i18n import _ |
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14 from . import ( |
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15 error, |
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16 pycompat, |
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17 ) |
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18 |
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19 # Set of flags to not apply boolean negation logic on |
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20 nevernegate = { |
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21 # avoid --no-noninteractive |
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22 b'noninteractive', |
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23 # These two flags are special because they cause hg to do one |
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24 # thing and then exit, and so aren't suitable for use in things |
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25 # like aliases anyway. |
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26 b'help', |
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27 b'version', |
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28 } |
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29 |
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30 |
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31 def _earlyoptarg(arg, shortlist, namelist): |
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32 """Check if the given arg is a valid unabbreviated option |
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33 |
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34 Returns (flag_str, has_embedded_value?, embedded_value, takes_value?) |
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35 |
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36 >>> def opt(arg): |
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37 ... return _earlyoptarg(arg, b'R:q', [b'cwd=', b'debugger']) |
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38 |
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39 long form: |
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40 |
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41 >>> opt(b'--cwd') |
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42 ('--cwd', False, '', True) |
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43 >>> opt(b'--cwd=') |
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44 ('--cwd', True, '', True) |
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45 >>> opt(b'--cwd=foo') |
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46 ('--cwd', True, 'foo', True) |
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47 >>> opt(b'--debugger') |
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48 ('--debugger', False, '', False) |
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49 >>> opt(b'--debugger=') # invalid but parsable |
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50 ('--debugger', True, '', False) |
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51 |
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52 short form: |
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53 |
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54 >>> opt(b'-R') |
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55 ('-R', False, '', True) |
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56 >>> opt(b'-Rfoo') |
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57 ('-R', True, 'foo', True) |
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58 >>> opt(b'-q') |
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59 ('-q', False, '', False) |
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60 >>> opt(b'-qfoo') # invalid but parsable |
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61 ('-q', True, 'foo', False) |
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62 |
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63 unknown or invalid: |
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64 |
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65 >>> opt(b'--unknown') |
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66 ('', False, '', False) |
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67 >>> opt(b'-u') |
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68 ('', False, '', False) |
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69 >>> opt(b'-ufoo') |
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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'-:') |
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76 ('', False, '', False) |
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77 >>> opt(b'-:foo') |
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78 ('', False, '', False) |
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79 """ |
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80 if arg.startswith(b'--'): |
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81 flag, eq, val = arg.partition(b'=') |
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82 if flag[2:] in namelist: |
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83 return flag, bool(eq), val, False |
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84 if flag[2:] + b'=' in namelist: |
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85 return flag, bool(eq), val, True |
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86 elif arg.startswith(b'-') and arg != b'-' and not arg.startswith(b'-:'): |
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87 flag, val = arg[:2], arg[2:] |
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88 i = shortlist.find(flag[1:]) |
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89 if i >= 0: |
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90 return flag, bool(val), val, shortlist.startswith(b':', i + 1) |
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91 return b'', False, b'', False |
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92 |
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93 |
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94 def earlygetopt(args, shortlist, namelist, gnu=False, keepsep=False): |
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95 """Parse options like getopt, but ignores unknown options and abbreviated |
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96 forms |
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97 |
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98 If gnu=False, this stops processing options as soon as a non/unknown-option |
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99 argument is encountered. Otherwise, option and non-option arguments may be |
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100 intermixed, and unknown-option arguments are taken as non-option. |
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101 |
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102 If keepsep=True, '--' won't be removed from the list of arguments left. |
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103 This is useful for stripping early options from a full command arguments. |
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104 |
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105 >>> def get(args, gnu=False, keepsep=False): |
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106 ... return earlygetopt(args, b'R:q', [b'cwd=', b'debugger'], |
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107 ... gnu=gnu, keepsep=keepsep) |
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108 |
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109 default parsing rules for early options: |
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110 |
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111 >>> get([b'x', b'--cwd', b'foo', b'-Rbar', b'-q', b'y'], gnu=True) |
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112 ([('--cwd', 'foo'), ('-R', 'bar'), ('-q', '')], ['x', 'y']) |
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113 >>> get([b'x', b'--cwd=foo', b'y', b'-R', b'bar', b'--debugger'], gnu=True) |
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114 ([('--cwd', 'foo'), ('-R', 'bar'), ('--debugger', '')], ['x', 'y']) |
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115 >>> get([b'--unknown', b'--cwd=foo', b'--', '--debugger'], gnu=True) |
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116 ([('--cwd', 'foo')], ['--unknown', '--debugger']) |
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117 |
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118 restricted parsing rules (early options must come first): |
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119 |
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120 >>> get([b'--cwd', b'foo', b'-Rbar', b'x', b'-q', b'y'], gnu=False) |
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121 ([('--cwd', 'foo'), ('-R', 'bar')], ['x', '-q', 'y']) |
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122 >>> get([b'--cwd=foo', b'x', b'y', b'-R', b'bar', b'--debugger'], gnu=False) |
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123 ([('--cwd', 'foo')], ['x', 'y', '-R', 'bar', '--debugger']) |
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124 >>> get([b'--unknown', b'--cwd=foo', b'--', '--debugger'], gnu=False) |
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125 ([], ['--unknown', '--cwd=foo', '--', '--debugger']) |
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126 |
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127 stripping early options (without loosing '--'): |
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128 |
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129 >>> get([b'x', b'-Rbar', b'--', '--debugger'], gnu=True, keepsep=True)[1] |
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130 ['x', '--', '--debugger'] |
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131 |
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132 last argument: |
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133 |
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134 >>> get([b'--cwd']) |
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135 ([], ['--cwd']) |
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136 >>> get([b'--cwd=foo']) |
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137 ([('--cwd', 'foo')], []) |
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138 >>> get([b'-R']) |
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139 ([], ['-R']) |
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140 >>> get([b'-Rbar']) |
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141 ([('-R', 'bar')], []) |
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142 >>> get([b'-q']) |
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143 ([('-q', '')], []) |
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144 >>> get([b'-q', b'--']) |
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145 ([('-q', '')], []) |
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146 |
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147 '--' may be a value: |
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148 |
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149 >>> get([b'-R', b'--', b'x']) |
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150 ([('-R', '--')], ['x']) |
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151 >>> get([b'--cwd', b'--', b'x']) |
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152 ([('--cwd', '--')], ['x']) |
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153 |
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154 value passed to bool options: |
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155 |
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156 >>> get([b'--debugger=foo', b'x']) |
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157 ([], ['--debugger=foo', 'x']) |
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158 >>> get([b'-qfoo', b'x']) |
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159 ([], ['-qfoo', 'x']) |
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160 |
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161 short option isn't separated with '=': |
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162 |
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163 >>> get([b'-R=bar']) |
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164 ([('-R', '=bar')], []) |
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165 |
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166 ':' may be in shortlist, but shouldn't be taken as an option letter: |
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167 |
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168 >>> get([b'-:', b'y']) |
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169 ([], ['-:', 'y']) |
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170 |
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171 '-' is a valid non-option argument: |
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172 |
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173 >>> get([b'-', b'y']) |
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174 ([], ['-', 'y']) |
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175 """ |
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176 parsedopts = [] |
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177 parsedargs = [] |
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178 pos = 0 |
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179 while pos < len(args): |
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180 arg = args[pos] |
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181 if arg == b'--': |
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182 pos += not keepsep |
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183 break |
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184 flag, hasval, val, takeval = _earlyoptarg(arg, shortlist, namelist) |
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185 if not hasval and takeval and pos + 1 >= len(args): |
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186 # missing last argument |
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187 break |
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188 if not flag or hasval and not takeval: |
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189 # non-option argument or -b/--bool=INVALID_VALUE |
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190 if gnu: |
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191 parsedargs.append(arg) |
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192 pos += 1 |
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193 else: |
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194 break |
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195 elif hasval == takeval: |
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196 # -b/--bool or -s/--str=VALUE |
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197 parsedopts.append((flag, val)) |
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198 pos += 1 |
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199 else: |
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200 # -s/--str VALUE |
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201 parsedopts.append((flag, args[pos + 1])) |
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202 pos += 2 |
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203 |
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204 parsedargs.extend(args[pos:]) |
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205 return parsedopts, parsedargs |
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206 |
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207 |
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208 class customopt(object): # pytype: disable=ignored-metaclass |
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209 """Manage defaults and mutations for any type of opt.""" |
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210 |
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211 __metaclass__ = abc.ABCMeta |
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212 |
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213 def __init__(self, defaultvalue): |
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214 self._defaultvalue = defaultvalue |
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215 |
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216 def _isboolopt(self): |
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217 return False |
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218 |
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219 def getdefaultvalue(self): |
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220 """Returns the default value for this opt. |
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221 |
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222 Subclasses should override this to return a new value if the value type |
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223 is mutable.""" |
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224 return self._defaultvalue |
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225 |
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226 @abc.abstractmethod |
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227 def newstate(self, oldstate, newparam, abort): |
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228 """Adds newparam to oldstate and returns the new state. |
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229 |
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230 On failure, abort can be called with a string error message.""" |
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231 |
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232 |
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233 class _simpleopt(customopt): |
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234 def _isboolopt(self): |
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235 return isinstance(self._defaultvalue, (bool, type(None))) |
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236 |
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237 def newstate(self, oldstate, newparam, abort): |
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238 return newparam |
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239 |
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240 |
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241 class _callableopt(customopt): |
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242 def __init__(self, callablefn): |
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243 self.callablefn = callablefn |
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244 super(_callableopt, self).__init__(None) |
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245 |
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246 def newstate(self, oldstate, newparam, abort): |
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247 return self.callablefn(newparam) |
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248 |
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249 |
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250 class _listopt(customopt): |
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251 def getdefaultvalue(self): |
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252 return self._defaultvalue[:] |
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253 |
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254 def newstate(self, oldstate, newparam, abort): |
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255 oldstate.append(newparam) |
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256 return oldstate |
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257 |
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258 |
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259 class _intopt(customopt): |
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260 def newstate(self, oldstate, newparam, abort): |
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261 try: |
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262 return int(newparam) |
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263 except ValueError: |
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264 abort(_(b'expected int')) |
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265 |
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266 |
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267 def _defaultopt(default): |
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268 """Returns a default opt implementation, given a default value.""" |
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269 |
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270 if isinstance(default, customopt): |
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271 return default |
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272 elif callable(default): |
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273 return _callableopt(default) |
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274 elif isinstance(default, list): |
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275 return _listopt(default[:]) |
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276 elif type(default) is type(1): |
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277 return _intopt(default) |
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278 else: |
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279 return _simpleopt(default) |
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280 |
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281 |
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282 def fancyopts(args, options, state, gnu=False, early=False, optaliases=None): |
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283 """ |
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284 read args, parse options, and store options in state |
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285 |
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286 each option is a tuple of: |
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287 |
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288 short option or '' |
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289 long option |
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290 default value |
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291 description |
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292 option value label(optional) |
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293 |
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294 option types include: |
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295 |
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296 boolean or none - option sets variable in state to true |
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297 string - parameter string is stored in state |
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298 list - parameter string is added to a list |
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299 integer - parameter strings is stored as int |
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300 function - call function with parameter |
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301 customopt - subclass of 'customopt' |
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302 |
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303 optaliases is a mapping from a canonical option name to a list of |
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304 additional long options. This exists for preserving backward compatibility |
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305 of early options. If we want to use it extensively, please consider moving |
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306 the functionality to the options table (e.g separate long options by '|'.) |
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307 |
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308 non-option args are returned |
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309 """ |
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310 if optaliases is None: |
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311 optaliases = {} |
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312 namelist = [] |
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313 shortlist = b'' |
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314 argmap = {} |
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315 defmap = {} |
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316 negations = {} |
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317 alllong = {o[1] for o in options} |
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318 |
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319 for option in options: |
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320 if len(option) == 5: |
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321 short, name, default, comment, dummy = option |
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322 else: |
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323 short, name, default, comment = option |
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324 # convert opts to getopt format |
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325 onames = [name] |
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326 onames.extend(optaliases.get(name, [])) |
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327 name = name.replace(b'-', b'_') |
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328 |
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329 argmap[b'-' + short] = name |
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330 for n in onames: |
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331 argmap[b'--' + n] = name |
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332 defmap[name] = _defaultopt(default) |
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333 |
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334 # copy defaults to state |
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335 state[name] = defmap[name].getdefaultvalue() |
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336 |
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337 # does it take a parameter? |
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338 if not defmap[name]._isboolopt(): |
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339 if short: |
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340 short += b':' |
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341 onames = [n + b'=' for n in onames] |
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342 elif name not in nevernegate: |
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343 for n in onames: |
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344 if n.startswith(b'no-'): |
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345 insert = n[3:] |
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346 else: |
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347 insert = b'no-' + n |
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348 # backout (as a practical example) has both --commit and |
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349 # --no-commit options, so we don't want to allow the |
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350 # negations of those flags. |
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351 if insert not in alllong: |
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352 assert (b'--' + n) not in negations |
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353 negations[b'--' + insert] = b'--' + n |
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354 namelist.append(insert) |
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355 if short: |
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356 shortlist += short |
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357 if name: |
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358 namelist.extend(onames) |
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359 |
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360 # parse arguments |
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361 if early: |
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362 parse = functools.partial(earlygetopt, gnu=gnu) |
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363 elif gnu: |
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364 parse = pycompat.gnugetoptb |
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365 else: |
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366 parse = pycompat.getoptb |
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367 opts, args = parse(args, shortlist, namelist) |
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368 |
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369 # transfer result to state |
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370 for opt, val in opts: |
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371 boolval = True |
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372 negation = negations.get(opt, False) |
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373 if negation: |
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374 opt = negation |
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375 boolval = False |
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376 name = argmap[opt] |
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377 obj = defmap[name] |
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378 if obj._isboolopt(): |
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379 state[name] = boolval |
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380 else: |
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381 |
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382 def abort(s): |
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383 raise error.InputError( |
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384 _(b'invalid value %r for option %s, %s') |
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385 % (pycompat.maybebytestr(val), opt, s) |
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386 ) |
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387 |
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388 state[name] = defmap[name].newstate(state[name], val, abort) |
209 | 389 |
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390 # return unparsed args |
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391 return args |