Mercurial > hg
annotate mercurial/match.py @ 24695:419528cb05b6
subrepo: convert the os.path references in git to vfs
There are a handful of os.path references in the free functions at the top of
the module that will be trickier to remove.
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Sat, 07 Feb 2015 12:57:40 -0500 |
parents | 36872036169b |
children | 0b1577c892f2 |
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 propertycache = util.propertycache |
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13 |
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14 def _rematcher(regex): |
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15 '''compile the regexp with the best available regexp engine and return a |
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16 matcher function''' |
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17 m = util.re.compile(regex) |
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18 try: |
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19 # slightly faster, provided by facebook's re2 bindings |
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20 return m.test_match |
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21 except AttributeError: |
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22 return m.match |
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23 |
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24 def _expandsets(kindpats, ctx): |
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25 '''Returns the kindpats list with the 'set' patterns expanded.''' |
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26 fset = set() |
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27 other = [] |
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28 |
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29 for kind, pat in kindpats: |
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30 if kind == 'set': |
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31 if not ctx: |
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32 raise util.Abort("fileset expression with no context") |
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33 s = ctx.getfileset(pat) |
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34 fset.update(s) |
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35 continue |
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36 other.append((kind, pat)) |
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37 return fset, other |
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38 |
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39 def _kindpatsalwaysmatch(kindpats): |
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40 """"Checks whether the kindspats match everything, as e.g. |
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41 'relpath:.' does. |
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42 """ |
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43 for kind, pat in kindpats: |
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44 if pat != '' or kind not in ['relpath', 'glob']: |
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45 return False |
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46 return True |
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47 |
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48 class match(object): |
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49 def __init__(self, root, cwd, patterns, include=[], exclude=[], |
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50 default='glob', exact=False, auditor=None, ctx=None): |
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51 """build an object to match a set of file patterns |
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52 |
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53 arguments: |
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54 root - the canonical root of the tree you're matching against |
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55 cwd - the current working directory, if relevant |
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56 patterns - patterns to find |
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57 include - patterns to include (unless they are excluded) |
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58 exclude - patterns to exclude (even if they are included) |
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59 default - if a pattern in patterns has no explicit type, assume this one |
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60 exact - patterns are actually filenames (include/exclude still apply) |
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61 |
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62 a pattern is one of: |
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63 'glob:<glob>' - a glob relative to cwd |
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64 're:<regexp>' - a regular expression |
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65 'path:<path>' - a path relative to repository root |
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66 'relglob:<glob>' - an unrooted glob (*.c matches C files in all dirs) |
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67 'relpath:<path>' - a path relative to cwd |
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68 'relre:<regexp>' - a regexp that needn't match the start of a name |
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69 'set:<fileset>' - a fileset expression |
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70 '<something>' - a pattern of the specified default type |
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71 """ |
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72 |
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73 self._root = root |
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74 self._cwd = cwd |
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75 self._files = [] # exact files and roots of patterns |
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76 self._anypats = bool(include or exclude) |
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77 self._always = False |
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78 self._pathrestricted = bool(include or exclude or patterns) |
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79 |
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80 matchfns = [] |
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81 if include: |
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82 kindpats = _normalize(include, 'glob', root, cwd, auditor) |
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83 self.includepat, im = _buildmatch(ctx, kindpats, '(?:/|$)') |
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84 matchfns.append(im) |
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85 if exclude: |
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86 kindpats = _normalize(exclude, 'glob', root, cwd, auditor) |
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87 self.excludepat, em = _buildmatch(ctx, kindpats, '(?:/|$)') |
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88 matchfns.append(lambda f: not em(f)) |
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89 if exact: |
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90 if isinstance(patterns, list): |
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91 self._files = patterns |
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92 else: |
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93 self._files = list(patterns) |
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94 matchfns.append(self.exact) |
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95 elif patterns: |
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96 kindpats = _normalize(patterns, default, root, cwd, auditor) |
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97 if not _kindpatsalwaysmatch(kindpats): |
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98 self._files = _roots(kindpats) |
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99 self._anypats = self._anypats or _anypats(kindpats) |
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100 self.patternspat, pm = _buildmatch(ctx, kindpats, '$') |
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101 matchfns.append(pm) |
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102 |
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103 if not matchfns: |
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104 m = util.always |
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105 self._always = True |
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106 elif len(matchfns) == 1: |
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107 m = matchfns[0] |
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108 else: |
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109 def m(f): |
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110 for matchfn in matchfns: |
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111 if not matchfn(f): |
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112 return False |
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113 return True |
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114 |
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115 self.matchfn = m |
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116 self._fmap = set(self._files) |
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117 |
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118 def __call__(self, fn): |
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119 return self.matchfn(fn) |
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120 def __iter__(self): |
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121 for f in self._files: |
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122 yield f |
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123 |
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124 # Callbacks related to how the matcher is used by dirstate.walk. |
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125 # Subscribers to these events must monkeypatch the matcher object. |
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126 def bad(self, f, msg): |
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127 '''Callback from dirstate.walk for each explicit file that can't be |
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128 found/accessed, with an error message.''' |
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129 pass |
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130 |
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131 # If an explicitdir is set, it will be called when an explicitly listed |
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132 # directory is visited. |
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133 explicitdir = None |
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134 |
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135 # If an traversedir is set, it will be called when a directory discovered |
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136 # by recursive traversal is visited. |
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137 traversedir = None |
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138 |
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139 def abs(self, f): |
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140 '''Convert a repo path back to path that is relative to the root of the |
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141 matcher.''' |
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142 return f |
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143 |
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144 def rel(self, f): |
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145 '''Convert repo path back to path that is relative to cwd of matcher.''' |
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146 return util.pathto(self._root, self._cwd, f) |
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147 |
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148 def uipath(self, f): |
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149 '''Convert repo path to a display path. If patterns or -I/-X were used |
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150 to create this matcher, the display path will be relative to cwd. |
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151 Otherwise it is relative to the root of the repo.''' |
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152 return (self._pathrestricted and self.rel(f)) or self.abs(f) |
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153 |
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154 def files(self): |
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155 '''Explicitly listed files or patterns or roots: |
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156 if no patterns or .always(): empty list, |
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157 if exact: list exact files, |
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158 if not .anypats(): list all files and dirs, |
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159 else: optimal roots''' |
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160 return self._files |
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161 |
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162 @propertycache |
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163 def _dirs(self): |
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164 return set(util.dirs(self._fmap)) | set(['.']) |
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165 |
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166 def visitdir(self, dir): |
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167 '''Helps while traversing a directory tree. Returns the string 'all' if |
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168 the given directory and all subdirectories should be visited. Otherwise |
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169 returns True or False indicating whether the given directory should be |
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170 visited. If 'all' is returned, calling this method on a subdirectory |
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171 gives an undefined result.''' |
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172 if not self._fmap or self.exact(dir): |
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173 return 'all' |
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174 return dir in self._dirs |
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175 |
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176 def exact(self, f): |
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177 '''Returns True if f is in .files().''' |
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178 return f in self._fmap |
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179 |
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180 def anypats(self): |
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181 '''Matcher uses patterns or include/exclude.''' |
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182 return self._anypats |
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183 |
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184 def always(self): |
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185 '''Matcher will match everything and .files() will be empty |
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186 - optimization might be possible and necessary.''' |
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187 return self._always |
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189 def isexact(self): |
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190 return self.matchfn == self.exact |
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191 |
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192 def exact(root, cwd, files): |
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193 return match(root, cwd, files, exact=True) |
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194 |
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195 def always(root, cwd): |
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196 return match(root, cwd, []) |
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197 |
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198 class narrowmatcher(match): |
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199 """Adapt a matcher to work on a subdirectory only. |
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200 |
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201 The paths are remapped to remove/insert the path as needed: |
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202 |
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203 >>> m1 = match('root', '', ['a.txt', 'sub/b.txt']) |
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204 >>> m2 = narrowmatcher('sub', m1) |
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205 >>> bool(m2('a.txt')) |
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206 False |
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207 >>> bool(m2('b.txt')) |
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208 True |
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209 >>> bool(m2.matchfn('a.txt')) |
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210 False |
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211 >>> bool(m2.matchfn('b.txt')) |
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212 True |
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213 >>> m2.files() |
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214 ['b.txt'] |
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215 >>> m2.exact('b.txt') |
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216 True |
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217 >>> util.pconvert(m2.rel('b.txt')) |
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218 'sub/b.txt' |
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219 >>> def bad(f, msg): |
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220 ... print "%s: %s" % (f, msg) |
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221 >>> m1.bad = bad |
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222 >>> m2.bad('x.txt', 'No such file') |
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223 sub/x.txt: No such file |
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224 >>> m2.abs('c.txt') |
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225 'sub/c.txt' |
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226 """ |
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227 |
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228 def __init__(self, path, matcher): |
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229 self._root = matcher._root |
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230 self._cwd = matcher._cwd |
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231 self._path = path |
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232 self._matcher = matcher |
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233 self._always = matcher._always |
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234 self._pathrestricted = matcher._pathrestricted |
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235 |
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236 self._files = [f[len(path) + 1:] for f in matcher._files |
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237 if f.startswith(path + "/")] |
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238 self._anypats = matcher._anypats |
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239 self.matchfn = lambda fn: matcher.matchfn(self._path + "/" + fn) |
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240 self._fmap = set(self._files) |
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241 |
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242 def abs(self, f): |
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243 return self._matcher.abs(self._path + "/" + f) |
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244 |
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245 def bad(self, f, msg): |
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246 self._matcher.bad(self._path + "/" + f, msg) |
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247 |
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248 def rel(self, f): |
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249 return self._matcher.rel(self._path + "/" + f) |
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250 |
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251 def patkind(pattern, default=None): |
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252 '''If pattern is 'kind:pat' with a known kind, return kind.''' |
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253 return _patsplit(pattern, default)[0] |
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254 |
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255 def _patsplit(pattern, default): |
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256 """Split a string into the optional pattern kind prefix and the actual |
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257 pattern.""" |
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258 if ':' in pattern: |
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259 kind, pat = pattern.split(':', 1) |
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260 if kind in ('re', 'glob', 'path', 'relglob', 'relpath', 'relre', |
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261 'listfile', 'listfile0', 'set'): |
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262 return kind, pat |
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263 return default, pattern |
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264 |
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265 def _globre(pat): |
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266 r'''Convert an extended glob string to a regexp string. |
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267 |
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268 >>> print _globre(r'?') |
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269 . |
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270 >>> print _globre(r'*') |
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271 [^/]* |
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272 >>> print _globre(r'**') |
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273 .* |
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274 >>> print _globre(r'**/a') |
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275 (?:.*/)?a |
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276 >>> print _globre(r'a/**/b') |
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277 a\/(?:.*/)?b |
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278 >>> print _globre(r'[a*?!^][^b][!c]') |
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279 [a*?!^][\^b][^c] |
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280 >>> print _globre(r'{a,b}') |
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281 (?:a|b) |
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282 >>> print _globre(r'.\*\?') |
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283 \.\*\? |
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284 ''' |
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285 i, n = 0, len(pat) |
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286 res = '' |
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287 group = 0 |
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288 escape = util.re.escape |
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289 def peek(): |
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290 return i < n and pat[i] |
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291 while i < n: |
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292 c = pat[i] |
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293 i += 1 |
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294 if c not in '*?[{},\\': |
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295 res += escape(c) |
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296 elif c == '*': |
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|
297 if peek() == '*': |
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298 i += 1 |
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299 if peek() == '/': |
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300 i += 1 |
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|
301 res += '(?:.*/)?' |
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302 else: |
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303 res += '.*' |
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|
304 else: |
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|
305 res += '[^/]*' |
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|
306 elif c == '?': |
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|
307 res += '.' |
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|
308 elif c == '[': |
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|
309 j = i |
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310 if j < n and pat[j] in '!]': |
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311 j += 1 |
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312 while j < n and pat[j] != ']': |
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313 j += 1 |
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314 if j >= n: |
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|
315 res += '\\[' |
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|
316 else: |
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317 stuff = pat[i:j].replace('\\','\\\\') |
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318 i = j + 1 |
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319 if stuff[0] == '!': |
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|
320 stuff = '^' + stuff[1:] |
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321 elif stuff[0] == '^': |
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322 stuff = '\\' + stuff |
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323 res = '%s[%s]' % (res, stuff) |
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|
324 elif c == '{': |
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|
325 group += 1 |
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|
326 res += '(?:' |
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327 elif c == '}' and group: |
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|
328 res += ')' |
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329 group -= 1 |
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330 elif c == ',' and group: |
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331 res += '|' |
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|
332 elif c == '\\': |
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333 p = peek() |
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|
334 if p: |
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|
335 i += 1 |
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|
336 res += escape(p) |
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337 else: |
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338 res += escape(c) |
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339 else: |
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340 res += escape(c) |
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341 return res |
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342 |
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343 def _regex(kind, pat, globsuffix): |
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344 '''Convert a (normalized) pattern of any kind into a regular expression. |
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345 globsuffix is appended to the regexp of globs.''' |
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346 if not pat: |
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347 return '' |
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348 if kind == 're': |
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349 return pat |
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350 if kind == 'path': |
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351 return '^' + util.re.escape(pat) + '(?:/|$)' |
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352 if kind == 'relglob': |
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353 return '(?:|.*/)' + _globre(pat) + globsuffix |
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354 if kind == 'relpath': |
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355 return util.re.escape(pat) + '(?:/|$)' |
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356 if kind == 'relre': |
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357 if pat.startswith('^'): |
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358 return pat |
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359 return '.*' + pat |
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360 return _globre(pat) + globsuffix |
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361 |
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362 def _buildmatch(ctx, kindpats, globsuffix): |
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363 '''Return regexp string and a matcher function for kindpats. |
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364 globsuffix is appended to the regexp of globs.''' |
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365 fset, kindpats = _expandsets(kindpats, ctx) |
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366 if not kindpats: |
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367 return "", fset.__contains__ |
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368 |
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369 regex, mf = _buildregexmatch(kindpats, globsuffix) |
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370 if fset: |
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371 return regex, lambda f: f in fset or mf(f) |
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372 return regex, mf |
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373 |
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374 def _buildregexmatch(kindpats, globsuffix): |
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375 """Build a match function from a list of kinds and kindpats, |
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376 return regexp string and a matcher function.""" |
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377 try: |
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378 regex = '(?:%s)' % '|'.join([_regex(k, p, globsuffix) |
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379 for (k, p) in kindpats]) |
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380 if len(regex) > 20000: |
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381 raise OverflowError |
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382 return regex, _rematcher(regex) |
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383 except OverflowError: |
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384 # We're using a Python with a tiny regex engine and we |
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385 # made it explode, so we'll divide the pattern list in two |
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386 # until it works |
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387 l = len(kindpats) |
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388 if l < 2: |
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389 raise |
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390 regexa, a = _buildregexmatch(kindpats[:l//2], globsuffix) |
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391 regexb, b = _buildregexmatch(kindpats[l//2:], globsuffix) |
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392 return regex, lambda s: a(s) or b(s) |
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393 except re.error: |
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394 for k, p in kindpats: |
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395 try: |
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396 _rematcher('(?:%s)' % _regex(k, p, globsuffix)) |
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397 except re.error: |
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398 raise util.Abort(_("invalid pattern (%s): %s") % (k, p)) |
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399 raise util.Abort(_("invalid pattern")) |
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400 |
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401 def _normalize(patterns, default, root, cwd, auditor): |
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402 '''Convert 'kind:pat' from the patterns list to tuples with kind and |
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403 normalized and rooted patterns and with listfiles expanded.''' |
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404 kindpats = [] |
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405 for kind, pat in [_patsplit(p, default) for p in patterns]: |
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406 if kind in ('glob', 'relpath'): |
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407 pat = pathutil.canonpath(root, cwd, pat, auditor) |
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408 elif kind in ('relglob', 'path'): |
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409 pat = util.normpath(pat) |
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410 elif kind in ('listfile', 'listfile0'): |
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411 try: |
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412 files = util.readfile(pat) |
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413 if kind == 'listfile0': |
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414 files = files.split('\0') |
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415 else: |
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416 files = files.splitlines() |
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417 files = [f for f in files if f] |
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418 except EnvironmentError: |
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419 raise util.Abort(_("unable to read file list (%s)") % pat) |
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420 kindpats += _normalize(files, default, root, cwd, auditor) |
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421 continue |
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422 # else: re or relre - which cannot be normalized |
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423 kindpats.append((kind, pat)) |
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424 return kindpats |
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425 |
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426 def _roots(kindpats): |
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427 '''return roots and exact explicitly listed files from patterns |
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428 |
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429 >>> _roots([('glob', 'g/*'), ('glob', 'g'), ('glob', 'g*')]) |
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430 ['g', 'g', '.'] |
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431 >>> _roots([('relpath', 'r'), ('path', 'p/p'), ('path', '')]) |
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432 ['r', 'p/p', '.'] |
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433 >>> _roots([('relglob', 'rg*'), ('re', 're/'), ('relre', 'rr')]) |
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434 ['.', '.', '.'] |
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435 ''' |
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436 r = [] |
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437 for kind, pat in kindpats: |
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438 if kind == 'glob': # find the non-glob prefix |
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439 root = [] |
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440 for p in pat.split('/'): |
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441 if '[' in p or '{' in p or '*' in p or '?' in p: |
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442 break |
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443 root.append(p) |
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444 r.append('/'.join(root) or '.') |
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445 elif kind in ('relpath', 'path'): |
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446 r.append(pat or '.') |
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447 else: # relglob, re, relre |
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448 r.append('.') |
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449 return r |
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450 |
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451 def _anypats(kindpats): |
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452 for kind, pat in kindpats: |
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453 if kind in ('glob', 're', 'relglob', 'relre', 'set'): |
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454 return True |