Mercurial > hg
annotate mercurial/fancyopts.py @ 44712:a825bfbf6642
templatekw: cache mergestate even if merge is not ongoing
While playing with eBPF, I noticed .hg/merge/state{,2} files were tried
to open() for each revision. That's not healthy. Let's cache the "inactive"
state as well.
author | Yuya Nishihara <yuya@tcha.org> |
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date | Wed, 15 Apr 2020 23:11:55 +0900 |
parents | 9d2b2df2c2ba |
children | 2eb8ad899fa6 |
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 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 |
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.Abort( |
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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 |