Mercurial > hg
annotate mercurial/fancyopts.py @ 51809:45270e286bdc default tip
typing: hide the interface version of `dirstate` during type checking
As noted in the previous commit, the `dirstate` type is still inferred as `Any`
by pytype, including where it is used as a base class for the largefiles
dirstate. That effectively disables most type checking. The problems fixed two
commits ago were flagged by this change.
I'm not at all clear what the benefit of the original type is, but that was what
was used at runtime, so I don't want to change the largefiles base class to the
raw class. Having both a lowercase and camelcase name for the same thing isn't
great, but given that this trivially finds problems without worrying about which
symbol clients may be using, and the non-raw type is useless to pytype anyway,
I'm not going to worry about it.
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Fri, 16 Aug 2024 18:11:52 -0400 |
parents | 642e31cb55f0 |
children |
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 |