Mercurial > hg
annotate mercurial/match.py @ 24071:184a2f6f40da
bundle2.unbundle20: add compressed() method
Bundlerepo uses the compressed() method to determine whether it should write
an uncompressed temporary file. Since we don't support compressed bundle2 files
at the moment, make this method return true.
author | Eric Sumner <ericsumner@fb.com> |
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date | Thu, 05 Feb 2015 15:56:50 -0800 |
parents | 164915e8ef7b |
children | d44d53bc9a1e |
rev | line source |
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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 class match(object): |
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38 def __init__(self, root, cwd, patterns, include=[], exclude=[], |
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39 default='glob', exact=False, auditor=None, ctx=None): |
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40 """build an object to match a set of file patterns |
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41 |
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42 arguments: |
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43 root - the canonical root of the tree you're matching against |
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44 cwd - the current working directory, if relevant |
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45 patterns - patterns to find |
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46 include - patterns to include (unless they are excluded) |
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47 exclude - patterns to exclude (even if they are included) |
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48 default - if a pattern in patterns has no explicit type, assume this one |
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49 exact - patterns are actually filenames (include/exclude still apply) |
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50 |
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51 a pattern is one of: |
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52 'glob:<glob>' - a glob relative to cwd |
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53 're:<regexp>' - a regular expression |
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54 'path:<path>' - a path relative to repository root |
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55 'relglob:<glob>' - an unrooted glob (*.c matches C files in all dirs) |
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56 'relpath:<path>' - a path relative to cwd |
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57 'relre:<regexp>' - a regexp that needn't match the start of a name |
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58 'set:<fileset>' - a fileset expression |
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59 '<something>' - a pattern of the specified default type |
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60 """ |
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61 |
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62 self._root = root |
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63 self._cwd = cwd |
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64 self._files = [] # exact files and roots of patterns |
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65 self._anypats = bool(include or exclude) |
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66 self._ctx = ctx |
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67 self._always = False |
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68 self._pathrestricted = bool(include or exclude or patterns) |
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69 |
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70 matchfns = [] |
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71 if include: |
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72 kindpats = _normalize(include, 'glob', root, cwd, auditor) |
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73 self.includepat, im = _buildmatch(ctx, kindpats, '(?:/|$)') |
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74 matchfns.append(im) |
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75 if exclude: |
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76 kindpats = _normalize(exclude, 'glob', root, cwd, auditor) |
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77 self.excludepat, em = _buildmatch(ctx, kindpats, '(?:/|$)') |
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78 matchfns.append(lambda f: not em(f)) |
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79 if exact: |
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80 if isinstance(patterns, list): |
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81 self._files = patterns |
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82 else: |
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83 self._files = list(patterns) |
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84 matchfns.append(self.exact) |
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85 elif patterns: |
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86 kindpats = _normalize(patterns, default, root, cwd, auditor) |
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87 self._files = _roots(kindpats) |
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88 self._anypats = self._anypats or _anypats(kindpats) |
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89 self.patternspat, pm = _buildmatch(ctx, kindpats, '$') |
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90 matchfns.append(pm) |
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91 |
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92 if not matchfns: |
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93 m = util.always |
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94 self._always = True |
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95 elif len(matchfns) == 1: |
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96 m = matchfns[0] |
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97 else: |
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98 def m(f): |
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99 for matchfn in matchfns: |
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100 if not matchfn(f): |
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101 return False |
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102 return True |
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103 |
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104 self.matchfn = m |
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105 self._fmap = set(self._files) |
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106 |
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107 def __call__(self, fn): |
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108 return self.matchfn(fn) |
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109 def __iter__(self): |
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110 for f in self._files: |
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111 yield f |
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112 |
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113 # Callbacks related to how the matcher is used by dirstate.walk. |
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114 # Subscribers to these events must monkeypatch the matcher object. |
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115 def bad(self, f, msg): |
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116 '''Callback from dirstate.walk for each explicit file that can't be |
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117 found/accessed, with an error message.''' |
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118 pass |
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119 |
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120 # If an explicitdir is set, it will be called when an explicitly listed |
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121 # directory is visited. |
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122 explicitdir = None |
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123 |
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124 # If an traversedir is set, it will be called when a directory discovered |
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125 # by recursive traversal is visited. |
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126 traversedir = None |
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127 |
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128 def abs(self, f): |
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129 '''Convert a repo path back to path that is relative to the root of the |
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130 matcher.''' |
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131 return f |
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132 |
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133 def rel(self, f): |
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134 '''Convert repo path back to path that is relative to cwd of matcher.''' |
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135 return util.pathto(self._root, self._cwd, f) |
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136 |
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137 def uipath(self, f): |
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138 '''Convert repo path to a display path. If patterns or -I/-X were used |
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139 to create this matcher, the display path will be relative to cwd. |
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140 Otherwise it is relative to the root of the repo.''' |
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141 return (self._pathrestricted and self.rel(f)) or self.abs(f) |
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142 |
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143 def files(self): |
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144 '''Explicitly listed files or patterns or roots: |
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145 if no patterns or .always(): empty list, |
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146 if exact: list exact files, |
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147 if not .anypats(): list all files and dirs, |
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148 else: optimal roots''' |
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149 return self._files |
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150 |
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151 def exact(self, f): |
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152 '''Returns True if f is in .files().''' |
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153 return f in self._fmap |
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154 |
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155 def anypats(self): |
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156 '''Matcher uses patterns or include/exclude.''' |
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157 return self._anypats |
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158 |
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159 def always(self): |
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160 '''Matcher will match everything and .files() will be empty |
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161 - optimization might be possible and necessary.''' |
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162 return self._always |
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164 def exact(root, cwd, files): |
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165 return match(root, cwd, files, exact=True) |
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166 |
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167 def always(root, cwd): |
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168 return match(root, cwd, []) |
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169 |
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170 class narrowmatcher(match): |
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171 """Adapt a matcher to work on a subdirectory only. |
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172 |
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173 The paths are remapped to remove/insert the path as needed: |
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174 |
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175 >>> m1 = match('root', '', ['a.txt', 'sub/b.txt']) |
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176 >>> m2 = narrowmatcher('sub', m1) |
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177 >>> bool(m2('a.txt')) |
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178 False |
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179 >>> bool(m2('b.txt')) |
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180 True |
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181 >>> bool(m2.matchfn('a.txt')) |
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182 False |
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183 >>> bool(m2.matchfn('b.txt')) |
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184 True |
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185 >>> m2.files() |
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186 ['b.txt'] |
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187 >>> m2.exact('b.txt') |
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188 True |
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189 >>> util.pconvert(m2.rel('b.txt')) |
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190 'sub/b.txt' |
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191 >>> def bad(f, msg): |
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192 ... print "%s: %s" % (f, msg) |
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193 >>> m1.bad = bad |
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194 >>> m2.bad('x.txt', 'No such file') |
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195 sub/x.txt: No such file |
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196 >>> m2.abs('c.txt') |
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197 'sub/c.txt' |
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198 """ |
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199 |
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200 def __init__(self, path, matcher): |
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201 self._root = matcher._root |
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202 self._cwd = matcher._cwd |
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203 self._path = path |
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204 self._matcher = matcher |
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205 self._always = matcher._always |
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206 self._pathrestricted = matcher._pathrestricted |
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207 |
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208 self._files = [f[len(path) + 1:] for f in matcher._files |
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209 if f.startswith(path + "/")] |
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210 self._anypats = matcher._anypats |
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211 self.matchfn = lambda fn: matcher.matchfn(self._path + "/" + fn) |
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212 self._fmap = set(self._files) |
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213 |
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214 def abs(self, f): |
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215 return self._matcher.abs(self._path + "/" + f) |
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216 |
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217 def bad(self, f, msg): |
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218 self._matcher.bad(self._path + "/" + f, msg) |
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219 |
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220 def rel(self, f): |
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221 return self._matcher.rel(self._path + "/" + f) |
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222 |
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223 def patkind(pattern, default=None): |
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224 '''If pattern is 'kind:pat' with a known kind, return kind.''' |
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225 return _patsplit(pattern, default)[0] |
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226 |
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227 def _patsplit(pattern, default): |
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228 """Split a string into the optional pattern kind prefix and the actual |
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229 pattern.""" |
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230 if ':' in pattern: |
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231 kind, pat = pattern.split(':', 1) |
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232 if kind in ('re', 'glob', 'path', 'relglob', 'relpath', 'relre', |
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233 'listfile', 'listfile0', 'set'): |
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234 return kind, pat |
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235 return default, pattern |
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236 |
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237 def _globre(pat): |
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238 r'''Convert an extended glob string to a regexp string. |
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239 |
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240 >>> print _globre(r'?') |
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241 . |
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242 >>> print _globre(r'*') |
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243 [^/]* |
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244 >>> print _globre(r'**') |
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245 .* |
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246 >>> print _globre(r'**/a') |
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247 (?:.*/)?a |
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248 >>> print _globre(r'a/**/b') |
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249 a\/(?:.*/)?b |
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250 >>> print _globre(r'[a*?!^][^b][!c]') |
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251 [a*?!^][\^b][^c] |
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252 >>> print _globre(r'{a,b}') |
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253 (?:a|b) |
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254 >>> print _globre(r'.\*\?') |
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255 \.\*\? |
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256 ''' |
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257 i, n = 0, len(pat) |
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258 res = '' |
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259 group = 0 |
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260 escape = util.re.escape |
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261 def peek(): |
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262 return i < n and pat[i] |
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263 while i < n: |
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264 c = pat[i] |
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265 i += 1 |
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266 if c not in '*?[{},\\': |
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267 res += escape(c) |
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268 elif c == '*': |
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269 if peek() == '*': |
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270 i += 1 |
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271 if peek() == '/': |
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272 i += 1 |
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273 res += '(?:.*/)?' |
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274 else: |
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275 res += '.*' |
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276 else: |
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277 res += '[^/]*' |
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278 elif c == '?': |
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279 res += '.' |
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280 elif c == '[': |
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281 j = i |
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282 if j < n and pat[j] in '!]': |
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283 j += 1 |
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284 while j < n and pat[j] != ']': |
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285 j += 1 |
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286 if j >= n: |
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287 res += '\\[' |
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288 else: |
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289 stuff = pat[i:j].replace('\\','\\\\') |
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290 i = j + 1 |
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291 if stuff[0] == '!': |
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292 stuff = '^' + stuff[1:] |
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293 elif stuff[0] == '^': |
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294 stuff = '\\' + stuff |
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295 res = '%s[%s]' % (res, stuff) |
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296 elif c == '{': |
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297 group += 1 |
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298 res += '(?:' |
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299 elif c == '}' and group: |
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300 res += ')' |
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301 group -= 1 |
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302 elif c == ',' and group: |
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303 res += '|' |
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304 elif c == '\\': |
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305 p = peek() |
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306 if p: |
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307 i += 1 |
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308 res += escape(p) |
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309 else: |
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310 res += escape(c) |
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311 else: |
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312 res += escape(c) |
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313 return res |
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314 |
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315 def _regex(kind, pat, globsuffix): |
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316 '''Convert a (normalized) pattern of any kind into a regular expression. |
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317 globsuffix is appended to the regexp of globs.''' |
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318 if not pat: |
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319 return '' |
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320 if kind == 're': |
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321 return pat |
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322 if kind == 'path': |
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323 return '^' + util.re.escape(pat) + '(?:/|$)' |
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324 if kind == 'relglob': |
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325 return '(?:|.*/)' + _globre(pat) + globsuffix |
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326 if kind == 'relpath': |
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327 return util.re.escape(pat) + '(?:/|$)' |
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328 if kind == 'relre': |
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329 if pat.startswith('^'): |
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330 return pat |
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331 return '.*' + pat |
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332 return _globre(pat) + globsuffix |
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333 |
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334 def _buildmatch(ctx, kindpats, globsuffix): |
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335 '''Return regexp string and a matcher function for kindpats. |
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336 globsuffix is appended to the regexp of globs.''' |
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337 fset, kindpats = _expandsets(kindpats, ctx) |
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338 if not kindpats: |
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339 return "", fset.__contains__ |
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340 |
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341 regex, mf = _buildregexmatch(kindpats, globsuffix) |
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342 if fset: |
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343 return regex, lambda f: f in fset or mf(f) |
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344 return regex, mf |
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345 |
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346 def _buildregexmatch(kindpats, globsuffix): |
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347 """Build a match function from a list of kinds and kindpats, |
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348 return regexp string and a matcher function.""" |
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349 try: |
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350 regex = '(?:%s)' % '|'.join([_regex(k, p, globsuffix) |
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351 for (k, p) in kindpats]) |
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352 if len(regex) > 20000: |
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353 raise OverflowError |
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354 return regex, _rematcher(regex) |
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355 except OverflowError: |
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356 # We're using a Python with a tiny regex engine and we |
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357 # made it explode, so we'll divide the pattern list in two |
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358 # until it works |
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359 l = len(kindpats) |
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360 if l < 2: |
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361 raise |
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362 regexa, a = _buildregexmatch(kindpats[:l//2], globsuffix) |
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363 regexb, b = _buildregexmatch(kindpats[l//2:], globsuffix) |
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364 return regex, lambda s: a(s) or b(s) |
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365 except re.error: |
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366 for k, p in kindpats: |
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367 try: |
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368 _rematcher('(?:%s)' % _regex(k, p, globsuffix)) |
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369 except re.error: |
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370 raise util.Abort(_("invalid pattern (%s): %s") % (k, p)) |
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371 raise util.Abort(_("invalid pattern")) |
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372 |
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373 def _normalize(patterns, default, root, cwd, auditor): |
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374 '''Convert 'kind:pat' from the patterns list to tuples with kind and |
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375 normalized and rooted patterns and with listfiles expanded.''' |
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376 kindpats = [] |
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377 for kind, pat in [_patsplit(p, default) for p in patterns]: |
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378 if kind in ('glob', 'relpath'): |
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379 pat = pathutil.canonpath(root, cwd, pat, auditor) |
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380 elif kind in ('relglob', 'path'): |
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381 pat = util.normpath(pat) |
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382 elif kind in ('listfile', 'listfile0'): |
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383 try: |
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384 files = util.readfile(pat) |
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385 if kind == 'listfile0': |
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386 files = files.split('\0') |
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387 else: |
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388 files = files.splitlines() |
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389 files = [f for f in files if f] |
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390 except EnvironmentError: |
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391 raise util.Abort(_("unable to read file list (%s)") % pat) |
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392 kindpats += _normalize(files, default, root, cwd, auditor) |
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393 continue |
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394 # else: re or relre - which cannot be normalized |
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395 kindpats.append((kind, pat)) |
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396 return kindpats |
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397 |
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398 def _roots(kindpats): |
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399 '''return roots and exact explicitly listed files from patterns |
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400 |
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401 >>> _roots([('glob', 'g/*'), ('glob', 'g'), ('glob', 'g*')]) |
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402 ['g', 'g', '.'] |
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403 >>> _roots([('relpath', 'r'), ('path', 'p/p'), ('path', '')]) |
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404 ['r', 'p/p', '.'] |
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405 >>> _roots([('relglob', 'rg*'), ('re', 're/'), ('relre', 'rr')]) |
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406 ['.', '.', '.'] |
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407 ''' |
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408 r = [] |
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409 for kind, pat in kindpats: |
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410 if kind == 'glob': # find the non-glob prefix |
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411 root = [] |
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412 for p in pat.split('/'): |
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413 if '[' in p or '{' in p or '*' in p or '?' in p: |
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414 break |
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415 root.append(p) |
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416 r.append('/'.join(root) or '.') |
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417 elif kind in ('relpath', 'path'): |
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418 r.append(pat or '.') |
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419 else: # relglob, re, relre |
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420 r.append('.') |
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421 return r |
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422 |
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423 def _anypats(kindpats): |
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424 for kind, pat in kindpats: |
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425 if kind in ('glob', 're', 'relglob', 'relre', 'set'): |
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426 return True |