Mercurial > hg
annotate mercurial/match.py @ 24553:afc29e29d569
dirstate: fix order of initializing nf vs f
Result of a bad merge.
author | Siddharth Agarwal <sid0@fb.com> |
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date | Tue, 31 Mar 2015 15:41:02 -0700 |
parents | 7797fadac0e8 |
children | 36872036169b |
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Generally replace "file name" with "filename" in help and comments.
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1 # match.py - filename matching |
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2 # |
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3 # Copyright 2008, 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 import re |
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9 import util, pathutil |
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10 from i18n import _ |
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12 def _rematcher(regex): |
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13 '''compile the regexp with the best available regexp engine and return a |
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14 matcher function''' |
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15 m = util.re.compile(regex) |
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16 try: |
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17 # slightly faster, provided by facebook's re2 bindings |
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18 return m.test_match |
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19 except AttributeError: |
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20 return m.match |
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21 |
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22 def _expandsets(kindpats, ctx): |
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23 '''Returns the kindpats list with the 'set' patterns expanded.''' |
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24 fset = set() |
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25 other = [] |
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26 |
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27 for kind, pat in kindpats: |
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28 if kind == 'set': |
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29 if not ctx: |
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30 raise util.Abort("fileset expression with no context") |
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31 s = ctx.getfileset(pat) |
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32 fset.update(s) |
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33 continue |
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34 other.append((kind, pat)) |
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35 return fset, other |
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36 |
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37 def _kindpatsalwaysmatch(kindpats): |
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38 """"Checks whether the kindspats match everything, as e.g. |
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39 'relpath:.' does. |
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40 """ |
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41 for kind, pat in kindpats: |
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42 if pat != '' or kind not in ['relpath', 'glob']: |
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43 return False |
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44 return True |
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45 |
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46 class match(object): |
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47 def __init__(self, root, cwd, patterns, include=[], exclude=[], |
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48 default='glob', exact=False, auditor=None, ctx=None): |
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49 """build an object to match a set of file patterns |
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50 |
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51 arguments: |
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52 root - the canonical root of the tree you're matching against |
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53 cwd - the current working directory, if relevant |
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54 patterns - patterns to find |
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55 include - patterns to include (unless they are excluded) |
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56 exclude - patterns to exclude (even if they are included) |
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57 default - if a pattern in patterns has no explicit type, assume this one |
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58 exact - patterns are actually filenames (include/exclude still apply) |
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59 |
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60 a pattern is one of: |
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61 'glob:<glob>' - a glob relative to cwd |
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62 're:<regexp>' - a regular expression |
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63 'path:<path>' - a path relative to repository root |
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64 'relglob:<glob>' - an unrooted glob (*.c matches C files in all dirs) |
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65 'relpath:<path>' - a path relative to cwd |
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66 'relre:<regexp>' - a regexp that needn't match the start of a name |
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67 'set:<fileset>' - a fileset expression |
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68 '<something>' - a pattern of the specified default type |
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69 """ |
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70 |
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71 self._root = root |
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72 self._cwd = cwd |
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73 self._files = [] # exact files and roots of patterns |
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74 self._anypats = bool(include or exclude) |
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75 self._always = False |
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76 self._pathrestricted = bool(include or exclude or patterns) |
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77 |
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78 matchfns = [] |
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79 if include: |
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80 kindpats = _normalize(include, 'glob', root, cwd, auditor) |
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81 self.includepat, im = _buildmatch(ctx, kindpats, '(?:/|$)') |
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82 matchfns.append(im) |
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83 if exclude: |
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84 kindpats = _normalize(exclude, 'glob', root, cwd, auditor) |
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85 self.excludepat, em = _buildmatch(ctx, kindpats, '(?:/|$)') |
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86 matchfns.append(lambda f: not em(f)) |
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87 if exact: |
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88 if isinstance(patterns, list): |
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89 self._files = patterns |
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90 else: |
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91 self._files = list(patterns) |
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92 matchfns.append(self.exact) |
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93 elif patterns: |
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94 kindpats = _normalize(patterns, default, root, cwd, auditor) |
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95 if not _kindpatsalwaysmatch(kindpats): |
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96 self._files = _roots(kindpats) |
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97 self._anypats = self._anypats or _anypats(kindpats) |
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98 self.patternspat, pm = _buildmatch(ctx, kindpats, '$') |
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99 matchfns.append(pm) |
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100 |
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101 if not matchfns: |
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102 m = util.always |
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103 self._always = True |
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104 elif len(matchfns) == 1: |
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105 m = matchfns[0] |
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106 else: |
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107 def m(f): |
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108 for matchfn in matchfns: |
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109 if not matchfn(f): |
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110 return False |
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111 return True |
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112 |
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113 self.matchfn = m |
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114 self._fmap = set(self._files) |
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115 |
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116 def __call__(self, fn): |
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117 return self.matchfn(fn) |
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118 def __iter__(self): |
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119 for f in self._files: |
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120 yield f |
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121 |
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122 # Callbacks related to how the matcher is used by dirstate.walk. |
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123 # Subscribers to these events must monkeypatch the matcher object. |
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124 def bad(self, f, msg): |
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125 '''Callback from dirstate.walk for each explicit file that can't be |
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126 found/accessed, with an error message.''' |
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127 pass |
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128 |
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129 # If an explicitdir is set, it will be called when an explicitly listed |
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130 # directory is visited. |
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131 explicitdir = None |
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132 |
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133 # If an traversedir is set, it will be called when a directory discovered |
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134 # by recursive traversal is visited. |
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135 traversedir = None |
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136 |
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137 def abs(self, f): |
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138 '''Convert a repo path back to path that is relative to the root of the |
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139 matcher.''' |
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140 return f |
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141 |
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142 def rel(self, f): |
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143 '''Convert repo path back to path that is relative to cwd of matcher.''' |
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144 return util.pathto(self._root, self._cwd, f) |
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145 |
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146 def uipath(self, f): |
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147 '''Convert repo path to a display path. If patterns or -I/-X were used |
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148 to create this matcher, the display path will be relative to cwd. |
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149 Otherwise it is relative to the root of the repo.''' |
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150 return (self._pathrestricted and self.rel(f)) or self.abs(f) |
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151 |
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152 def files(self): |
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153 '''Explicitly listed files or patterns or roots: |
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154 if no patterns or .always(): empty list, |
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155 if exact: list exact files, |
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156 if not .anypats(): list all files and dirs, |
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157 else: optimal roots''' |
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158 return self._files |
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159 |
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160 def exact(self, f): |
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161 '''Returns True if f is in .files().''' |
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162 return f in self._fmap |
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163 |
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164 def anypats(self): |
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165 '''Matcher uses patterns or include/exclude.''' |
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166 return self._anypats |
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167 |
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168 def always(self): |
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169 '''Matcher will match everything and .files() will be empty |
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170 - optimization might be possible and necessary.''' |
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171 return self._always |
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173 def isexact(self): |
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174 return self.matchfn == self.exact |
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175 |
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176 def exact(root, cwd, files): |
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177 return match(root, cwd, files, exact=True) |
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178 |
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179 def always(root, cwd): |
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180 return match(root, cwd, []) |
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181 |
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182 class narrowmatcher(match): |
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183 """Adapt a matcher to work on a subdirectory only. |
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184 |
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185 The paths are remapped to remove/insert the path as needed: |
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186 |
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187 >>> m1 = match('root', '', ['a.txt', 'sub/b.txt']) |
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188 >>> m2 = narrowmatcher('sub', m1) |
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189 >>> bool(m2('a.txt')) |
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190 False |
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191 >>> bool(m2('b.txt')) |
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192 True |
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193 >>> bool(m2.matchfn('a.txt')) |
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194 False |
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195 >>> bool(m2.matchfn('b.txt')) |
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196 True |
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197 >>> m2.files() |
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198 ['b.txt'] |
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199 >>> m2.exact('b.txt') |
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200 True |
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201 >>> util.pconvert(m2.rel('b.txt')) |
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202 'sub/b.txt' |
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203 >>> def bad(f, msg): |
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204 ... print "%s: %s" % (f, msg) |
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205 >>> m1.bad = bad |
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206 >>> m2.bad('x.txt', 'No such file') |
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207 sub/x.txt: No such file |
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208 >>> m2.abs('c.txt') |
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209 'sub/c.txt' |
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210 """ |
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211 |
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212 def __init__(self, path, matcher): |
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213 self._root = matcher._root |
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214 self._cwd = matcher._cwd |
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215 self._path = path |
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216 self._matcher = matcher |
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217 self._always = matcher._always |
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218 self._pathrestricted = matcher._pathrestricted |
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219 |
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220 self._files = [f[len(path) + 1:] for f in matcher._files |
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221 if f.startswith(path + "/")] |
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222 self._anypats = matcher._anypats |
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223 self.matchfn = lambda fn: matcher.matchfn(self._path + "/" + fn) |
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224 self._fmap = set(self._files) |
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225 |
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226 def abs(self, f): |
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227 return self._matcher.abs(self._path + "/" + f) |
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228 |
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229 def bad(self, f, msg): |
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230 self._matcher.bad(self._path + "/" + f, msg) |
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231 |
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232 def rel(self, f): |
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233 return self._matcher.rel(self._path + "/" + f) |
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234 |
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235 def patkind(pattern, default=None): |
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236 '''If pattern is 'kind:pat' with a known kind, return kind.''' |
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237 return _patsplit(pattern, default)[0] |
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238 |
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239 def _patsplit(pattern, default): |
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240 """Split a string into the optional pattern kind prefix and the actual |
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241 pattern.""" |
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242 if ':' in pattern: |
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243 kind, pat = pattern.split(':', 1) |
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244 if kind in ('re', 'glob', 'path', 'relglob', 'relpath', 'relre', |
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245 'listfile', 'listfile0', 'set'): |
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246 return kind, pat |
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247 return default, pattern |
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248 |
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249 def _globre(pat): |
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250 r'''Convert an extended glob string to a regexp string. |
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251 |
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252 >>> print _globre(r'?') |
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253 . |
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254 >>> print _globre(r'*') |
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255 [^/]* |
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256 >>> print _globre(r'**') |
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257 .* |
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258 >>> print _globre(r'**/a') |
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259 (?:.*/)?a |
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260 >>> print _globre(r'a/**/b') |
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261 a\/(?:.*/)?b |
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262 >>> print _globre(r'[a*?!^][^b][!c]') |
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263 [a*?!^][\^b][^c] |
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264 >>> print _globre(r'{a,b}') |
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265 (?:a|b) |
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266 >>> print _globre(r'.\*\?') |
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267 \.\*\? |
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268 ''' |
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269 i, n = 0, len(pat) |
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270 res = '' |
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271 group = 0 |
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272 escape = util.re.escape |
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273 def peek(): |
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274 return i < n and pat[i] |
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275 while i < n: |
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276 c = pat[i] |
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277 i += 1 |
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278 if c not in '*?[{},\\': |
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279 res += escape(c) |
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280 elif c == '*': |
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281 if peek() == '*': |
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282 i += 1 |
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283 if peek() == '/': |
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284 i += 1 |
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285 res += '(?:.*/)?' |
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286 else: |
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287 res += '.*' |
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288 else: |
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289 res += '[^/]*' |
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290 elif c == '?': |
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291 res += '.' |
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292 elif c == '[': |
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293 j = i |
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294 if j < n and pat[j] in '!]': |
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295 j += 1 |
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296 while j < n and pat[j] != ']': |
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297 j += 1 |
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298 if j >= n: |
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299 res += '\\[' |
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300 else: |
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301 stuff = pat[i:j].replace('\\','\\\\') |
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302 i = j + 1 |
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303 if stuff[0] == '!': |
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304 stuff = '^' + stuff[1:] |
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305 elif stuff[0] == '^': |
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306 stuff = '\\' + stuff |
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307 res = '%s[%s]' % (res, stuff) |
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308 elif c == '{': |
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309 group += 1 |
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310 res += '(?:' |
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311 elif c == '}' and group: |
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312 res += ')' |
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313 group -= 1 |
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314 elif c == ',' and group: |
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315 res += '|' |
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316 elif c == '\\': |
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317 p = peek() |
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318 if p: |
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319 i += 1 |
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320 res += escape(p) |
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321 else: |
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322 res += escape(c) |
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323 else: |
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324 res += escape(c) |
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325 return res |
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326 |
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327 def _regex(kind, pat, globsuffix): |
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328 '''Convert a (normalized) pattern of any kind into a regular expression. |
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329 globsuffix is appended to the regexp of globs.''' |
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330 if not pat: |
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331 return '' |
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332 if kind == 're': |
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333 return pat |
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334 if kind == 'path': |
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335 return '^' + util.re.escape(pat) + '(?:/|$)' |
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336 if kind == 'relglob': |
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337 return '(?:|.*/)' + _globre(pat) + globsuffix |
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338 if kind == 'relpath': |
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339 return util.re.escape(pat) + '(?:/|$)' |
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340 if kind == 'relre': |
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341 if pat.startswith('^'): |
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342 return pat |
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343 return '.*' + pat |
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344 return _globre(pat) + globsuffix |
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345 |
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346 def _buildmatch(ctx, kindpats, globsuffix): |
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347 '''Return regexp string and a matcher function for kindpats. |
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348 globsuffix is appended to the regexp of globs.''' |
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349 fset, kindpats = _expandsets(kindpats, ctx) |
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350 if not kindpats: |
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351 return "", fset.__contains__ |
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352 |
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353 regex, mf = _buildregexmatch(kindpats, globsuffix) |
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354 if fset: |
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355 return regex, lambda f: f in fset or mf(f) |
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356 return regex, mf |
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357 |
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358 def _buildregexmatch(kindpats, globsuffix): |
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359 """Build a match function from a list of kinds and kindpats, |
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360 return regexp string and a matcher function.""" |
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361 try: |
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362 regex = '(?:%s)' % '|'.join([_regex(k, p, globsuffix) |
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363 for (k, p) in kindpats]) |
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364 if len(regex) > 20000: |
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365 raise OverflowError |
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366 return regex, _rematcher(regex) |
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367 except OverflowError: |
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368 # We're using a Python with a tiny regex engine and we |
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369 # made it explode, so we'll divide the pattern list in two |
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370 # until it works |
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371 l = len(kindpats) |
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372 if l < 2: |
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373 raise |
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374 regexa, a = _buildregexmatch(kindpats[:l//2], globsuffix) |
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375 regexb, b = _buildregexmatch(kindpats[l//2:], globsuffix) |
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376 return regex, lambda s: a(s) or b(s) |
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377 except re.error: |
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378 for k, p in kindpats: |
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379 try: |
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380 _rematcher('(?:%s)' % _regex(k, p, globsuffix)) |
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381 except re.error: |
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382 raise util.Abort(_("invalid pattern (%s): %s") % (k, p)) |
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383 raise util.Abort(_("invalid pattern")) |
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384 |
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385 def _normalize(patterns, default, root, cwd, auditor): |
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386 '''Convert 'kind:pat' from the patterns list to tuples with kind and |
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387 normalized and rooted patterns and with listfiles expanded.''' |
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388 kindpats = [] |
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389 for kind, pat in [_patsplit(p, default) for p in patterns]: |
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390 if kind in ('glob', 'relpath'): |
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391 pat = pathutil.canonpath(root, cwd, pat, auditor) |
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392 elif kind in ('relglob', 'path'): |
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393 pat = util.normpath(pat) |
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394 elif kind in ('listfile', 'listfile0'): |
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395 try: |
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396 files = util.readfile(pat) |
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397 if kind == 'listfile0': |
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398 files = files.split('\0') |
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399 else: |
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400 files = files.splitlines() |
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401 files = [f for f in files if f] |
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402 except EnvironmentError: |
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403 raise util.Abort(_("unable to read file list (%s)") % pat) |
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404 kindpats += _normalize(files, default, root, cwd, auditor) |
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405 continue |
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406 # else: re or relre - which cannot be normalized |
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407 kindpats.append((kind, pat)) |
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408 return kindpats |
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409 |
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410 def _roots(kindpats): |
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411 '''return roots and exact explicitly listed files from patterns |
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412 |
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413 >>> _roots([('glob', 'g/*'), ('glob', 'g'), ('glob', 'g*')]) |
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414 ['g', 'g', '.'] |
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415 >>> _roots([('relpath', 'r'), ('path', 'p/p'), ('path', '')]) |
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416 ['r', 'p/p', '.'] |
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417 >>> _roots([('relglob', 'rg*'), ('re', 're/'), ('relre', 'rr')]) |
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418 ['.', '.', '.'] |
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419 ''' |
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420 r = [] |
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421 for kind, pat in kindpats: |
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422 if kind == 'glob': # find the non-glob prefix |
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423 root = [] |
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424 for p in pat.split('/'): |
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425 if '[' in p or '{' in p or '*' in p or '?' in p: |
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426 break |
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427 root.append(p) |
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428 r.append('/'.join(root) or '.') |
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429 elif kind in ('relpath', 'path'): |
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430 r.append(pat or '.') |
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431 else: # relglob, re, relre |
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432 r.append('.') |
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433 return r |
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434 |
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435 def _anypats(kindpats): |
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436 for kind, pat in kindpats: |
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437 if kind in ('glob', 're', 'relglob', 'relre', 'set'): |
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438 return True |