Mercurial > hg
annotate mercurial/fancyopts.py @ 36160:9fd8c2a3db5a
narrowspec: move module into core
Having support for parsing the narrow specification in core is
necessary for moving many other parts of narrow to core.
We do still want to harmonize the narrow spec with the sparse
spec. And the format needs to be documented. But this shouldn't
hold up the code moving to core.
Differential Revision: https://phab.mercurial-scm.org/D2201
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Mon, 12 Feb 2018 16:21:34 -0800 |
parents | 98a5aa5575e7 |
children | cc9d0763c8e9 |
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 functools |
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11 |
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12 from .i18n import _ |
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13 from . import ( |
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14 error, |
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15 pycompat, |
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16 ) |
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17 |
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18 # Set of flags to not apply boolean negation logic on |
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19 nevernegate = { |
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20 # avoid --no-noninteractive |
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21 'noninteractive', |
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22 # These two flags are special because they cause hg to do one |
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23 # thing and then exit, and so aren't suitable for use in things |
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24 # like aliases anyway. |
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25 'help', |
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26 'version', |
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27 } |
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28 |
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29 def _earlyoptarg(arg, shortlist, namelist): |
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30 """Check if the given arg is a valid unabbreviated option |
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31 |
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32 Returns (flag_str, has_embedded_value?, embedded_value, takes_value?) |
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33 |
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34 >>> def opt(arg): |
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35 ... return _earlyoptarg(arg, b'R:q', [b'cwd=', b'debugger']) |
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36 |
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37 long form: |
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38 |
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39 >>> opt(b'--cwd') |
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40 ('--cwd', False, '', True) |
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41 >>> opt(b'--cwd=') |
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42 ('--cwd', True, '', True) |
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43 >>> opt(b'--cwd=foo') |
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44 ('--cwd', True, 'foo', True) |
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45 >>> opt(b'--debugger') |
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46 ('--debugger', False, '', False) |
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47 >>> opt(b'--debugger=') # invalid but parsable |
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48 ('--debugger', True, '', False) |
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49 |
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50 short form: |
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51 |
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52 >>> opt(b'-R') |
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53 ('-R', False, '', True) |
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54 >>> opt(b'-Rfoo') |
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55 ('-R', True, 'foo', True) |
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56 >>> opt(b'-q') |
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57 ('-q', False, '', False) |
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58 >>> opt(b'-qfoo') # invalid but parsable |
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59 ('-q', True, 'foo', False) |
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60 |
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61 unknown or invalid: |
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62 |
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63 >>> opt(b'--unknown') |
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64 ('', False, '', False) |
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65 >>> opt(b'-u') |
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66 ('', False, '', False) |
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67 >>> opt(b'-ufoo') |
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68 ('', False, '', False) |
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69 >>> opt(b'--') |
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70 ('', False, '', False) |
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71 >>> opt(b'-') |
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72 ('', False, '', False) |
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73 >>> opt(b'-:') |
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74 ('', False, '', False) |
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75 >>> opt(b'-:foo') |
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76 ('', False, '', False) |
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77 """ |
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78 if arg.startswith('--'): |
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79 flag, eq, val = arg.partition('=') |
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80 if flag[2:] in namelist: |
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81 return flag, bool(eq), val, False |
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82 if flag[2:] + '=' in namelist: |
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83 return flag, bool(eq), val, True |
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84 elif arg.startswith('-') and arg != '-' and not arg.startswith('-:'): |
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85 flag, val = arg[:2], arg[2:] |
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86 i = shortlist.find(flag[1:]) |
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87 if i >= 0: |
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88 return flag, bool(val), val, shortlist.startswith(':', i + 1) |
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89 return '', False, '', False |
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90 |
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91 def earlygetopt(args, shortlist, namelist, gnu=False, keepsep=False): |
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92 """Parse options like getopt, but ignores unknown options and abbreviated |
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93 forms |
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94 |
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95 If gnu=False, this stops processing options as soon as a non/unknown-option |
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96 argument is encountered. Otherwise, option and non-option arguments may be |
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97 intermixed, and unknown-option arguments are taken as non-option. |
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98 |
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99 If keepsep=True, '--' won't be removed from the list of arguments left. |
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100 This is useful for stripping early options from a full command arguments. |
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101 |
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102 >>> def get(args, gnu=False, keepsep=False): |
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103 ... return earlygetopt(args, b'R:q', [b'cwd=', b'debugger'], |
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104 ... gnu=gnu, keepsep=keepsep) |
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105 |
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106 default parsing rules for early options: |
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107 |
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108 >>> get([b'x', b'--cwd', b'foo', b'-Rbar', b'-q', b'y'], gnu=True) |
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109 ([('--cwd', 'foo'), ('-R', 'bar'), ('-q', '')], ['x', 'y']) |
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110 >>> get([b'x', b'--cwd=foo', b'y', b'-R', b'bar', b'--debugger'], gnu=True) |
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111 ([('--cwd', 'foo'), ('-R', 'bar'), ('--debugger', '')], ['x', 'y']) |
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112 >>> get([b'--unknown', b'--cwd=foo', b'--', '--debugger'], gnu=True) |
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113 ([('--cwd', 'foo')], ['--unknown', '--debugger']) |
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114 |
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115 restricted parsing rules (early options must come first): |
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116 |
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117 >>> get([b'--cwd', b'foo', b'-Rbar', b'x', b'-q', b'y'], gnu=False) |
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118 ([('--cwd', 'foo'), ('-R', 'bar')], ['x', '-q', 'y']) |
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119 >>> get([b'--cwd=foo', b'x', b'y', b'-R', b'bar', b'--debugger'], gnu=False) |
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120 ([('--cwd', 'foo')], ['x', 'y', '-R', 'bar', '--debugger']) |
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121 >>> get([b'--unknown', b'--cwd=foo', b'--', '--debugger'], gnu=False) |
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122 ([], ['--unknown', '--cwd=foo', '--', '--debugger']) |
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123 |
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124 stripping early options (without loosing '--'): |
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125 |
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126 >>> get([b'x', b'-Rbar', b'--', '--debugger'], gnu=True, keepsep=True)[1] |
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127 ['x', '--', '--debugger'] |
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128 |
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129 last argument: |
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130 |
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131 >>> get([b'--cwd']) |
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132 ([], ['--cwd']) |
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133 >>> get([b'--cwd=foo']) |
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134 ([('--cwd', 'foo')], []) |
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135 >>> get([b'-R']) |
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136 ([], ['-R']) |
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137 >>> get([b'-Rbar']) |
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138 ([('-R', 'bar')], []) |
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139 >>> get([b'-q']) |
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140 ([('-q', '')], []) |
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141 >>> get([b'-q', b'--']) |
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142 ([('-q', '')], []) |
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143 |
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144 '--' may be a value: |
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145 |
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146 >>> get([b'-R', b'--', b'x']) |
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147 ([('-R', '--')], ['x']) |
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148 >>> get([b'--cwd', b'--', b'x']) |
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149 ([('--cwd', '--')], ['x']) |
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150 |
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151 value passed to bool options: |
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152 |
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153 >>> get([b'--debugger=foo', b'x']) |
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154 ([], ['--debugger=foo', 'x']) |
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155 >>> get([b'-qfoo', b'x']) |
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156 ([], ['-qfoo', 'x']) |
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157 |
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158 short option isn't separated with '=': |
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159 |
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160 >>> get([b'-R=bar']) |
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161 ([('-R', '=bar')], []) |
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162 |
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163 ':' may be in shortlist, but shouldn't be taken as an option letter: |
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164 |
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165 >>> get([b'-:', b'y']) |
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166 ([], ['-:', 'y']) |
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167 |
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168 '-' is a valid non-option argument: |
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169 |
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170 >>> get([b'-', b'y']) |
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171 ([], ['-', 'y']) |
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172 """ |
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173 parsedopts = [] |
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174 parsedargs = [] |
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175 pos = 0 |
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176 while pos < len(args): |
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177 arg = args[pos] |
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178 if arg == '--': |
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179 pos += not keepsep |
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180 break |
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181 flag, hasval, val, takeval = _earlyoptarg(arg, shortlist, namelist) |
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182 if not hasval and takeval and pos + 1 >= len(args): |
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183 # missing last argument |
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184 break |
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185 if not flag or hasval and not takeval: |
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186 # non-option argument or -b/--bool=INVALID_VALUE |
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187 if gnu: |
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188 parsedargs.append(arg) |
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189 pos += 1 |
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190 else: |
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191 break |
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192 elif hasval == takeval: |
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193 # -b/--bool or -s/--str=VALUE |
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194 parsedopts.append((flag, val)) |
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195 pos += 1 |
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196 else: |
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197 # -s/--str VALUE |
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198 parsedopts.append((flag, args[pos + 1])) |
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199 pos += 2 |
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200 |
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201 parsedargs.extend(args[pos:]) |
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202 return parsedopts, parsedargs |
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203 |
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204 def fancyopts(args, options, state, gnu=False, early=False, optaliases=None): |
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205 """ |
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206 read args, parse options, and store options in state |
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207 |
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208 each option is a tuple of: |
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209 |
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210 short option or '' |
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211 long option |
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212 default value |
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213 description |
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214 option value label(optional) |
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215 |
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216 option types include: |
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217 |
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218 boolean or none - option sets variable in state to true |
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219 string - parameter string is stored in state |
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220 list - parameter string is added to a list |
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221 integer - parameter strings is stored as int |
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222 function - call function with parameter |
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223 |
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224 optaliases is a mapping from a canonical option name to a list of |
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225 additional long options. This exists for preserving backward compatibility |
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226 of early options. If we want to use it extensively, please consider moving |
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227 the functionality to the options table (e.g separate long options by '|'.) |
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228 |
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229 non-option args are returned |
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230 """ |
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231 if optaliases is None: |
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232 optaliases = {} |
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233 namelist = [] |
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234 shortlist = '' |
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235 argmap = {} |
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236 defmap = {} |
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237 negations = {} |
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238 alllong = set(o[1] for o in options) |
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239 |
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240 for option in options: |
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241 if len(option) == 5: |
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242 short, name, default, comment, dummy = option |
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243 else: |
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244 short, name, default, comment = option |
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245 # convert opts to getopt format |
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246 onames = [name] |
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247 onames.extend(optaliases.get(name, [])) |
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248 name = name.replace('-', '_') |
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249 |
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250 argmap['-' + short] = name |
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251 for n in onames: |
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252 argmap['--' + n] = name |
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253 defmap[name] = default |
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254 |
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255 # copy defaults to state |
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256 if isinstance(default, list): |
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257 state[name] = default[:] |
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258 elif callable(default): |
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259 state[name] = None |
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260 else: |
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261 state[name] = default |
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262 |
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263 # does it take a parameter? |
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264 if not (default is None or default is True or default is False): |
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265 if short: |
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266 short += ':' |
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267 onames = [n + '=' for n in onames] |
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268 elif name not in nevernegate: |
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269 for n in onames: |
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270 if n.startswith('no-'): |
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271 insert = n[3:] |
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272 else: |
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273 insert = 'no-' + n |
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274 # backout (as a practical example) has both --commit and |
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275 # --no-commit options, so we don't want to allow the |
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276 # negations of those flags. |
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277 if insert not in alllong: |
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278 assert ('--' + n) not in negations |
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279 negations['--' + insert] = '--' + n |
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280 namelist.append(insert) |
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281 if short: |
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282 shortlist += short |
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283 if name: |
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284 namelist.extend(onames) |
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285 |
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286 # parse arguments |
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287 if early: |
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288 parse = functools.partial(earlygetopt, gnu=gnu) |
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289 elif gnu: |
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290 parse = pycompat.gnugetoptb |
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291 else: |
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292 parse = pycompat.getoptb |
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293 opts, args = parse(args, shortlist, namelist) |
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294 |
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295 # transfer result to state |
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296 for opt, val in opts: |
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297 boolval = True |
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298 negation = negations.get(opt, False) |
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299 if negation: |
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300 opt = negation |
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301 boolval = False |
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302 name = argmap[opt] |
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303 obj = defmap[name] |
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304 t = type(obj) |
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305 if callable(obj): |
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306 state[name] = defmap[name](val) |
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307 elif t is type(1): |
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308 try: |
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309 state[name] = int(val) |
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310 except ValueError: |
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311 raise error.Abort(_('invalid value %r for option %s, ' |
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312 'expected int') % (val, opt)) |
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313 elif t is type(''): |
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314 state[name] = val |
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315 elif t is type([]): |
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316 state[name].append(val) |
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317 elif t is type(None) or t is type(False): |
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318 state[name] = boolval |
209 | 319 |
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320 # return unparsed args |
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321 return args |