Mercurial > hg
annotate mercurial/match.py @ 23027:3971f64d7a25
glossary: add deprecated and experimental
author | Matt Mackall <mpm@selenic.com> |
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date | Fri, 17 Oct 2014 12:34:27 -0500 |
parents | bbb2f8b0459e |
children | 88d2d77eb981 |
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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 |
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69 matchfns = [] |
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70 if include: |
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71 kindpats = _normalize(include, 'glob', root, cwd, auditor) |
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72 self.includepat, im = _buildmatch(ctx, kindpats, '(?:/|$)') |
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73 matchfns.append(im) |
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74 if exclude: |
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75 kindpats = _normalize(exclude, 'glob', root, cwd, auditor) |
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76 self.excludepat, em = _buildmatch(ctx, kindpats, '(?:/|$)') |
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77 matchfns.append(lambda f: not em(f)) |
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78 if exact: |
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79 if isinstance(patterns, list): |
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80 self._files = patterns |
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81 else: |
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82 self._files = list(patterns) |
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83 matchfns.append(self.exact) |
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84 elif patterns: |
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85 kindpats = _normalize(patterns, default, root, cwd, auditor) |
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86 self._files = _roots(kindpats) |
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87 self._anypats = self._anypats or _anypats(kindpats) |
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88 self.patternspat, pm = _buildmatch(ctx, kindpats, '$') |
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89 matchfns.append(pm) |
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90 |
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91 if not matchfns: |
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92 m = util.always |
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93 self._always = True |
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94 elif len(matchfns) == 1: |
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95 m = matchfns[0] |
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96 else: |
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97 def m(f): |
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98 for matchfn in matchfns: |
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99 if not matchfn(f): |
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100 return False |
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101 return True |
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102 |
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103 self.matchfn = m |
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104 self._fmap = set(self._files) |
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105 |
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106 def __call__(self, fn): |
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107 return self.matchfn(fn) |
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108 def __iter__(self): |
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109 for f in self._files: |
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110 yield f |
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111 |
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112 # Callbacks related to how the matcher is used by dirstate.walk. |
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113 # Subscribers to these events must monkeypatch the matcher object. |
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114 def bad(self, f, msg): |
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115 '''Callback from dirstate.walk for each explicit file that can't be |
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116 found/accessed, with an error message.''' |
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117 pass |
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118 |
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119 # If an explicitdir is set, it will be called when an explicitly listed |
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120 # directory is visited. |
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121 explicitdir = None |
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122 |
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123 # If an traversedir is set, it will be called when a directory discovered |
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124 # by recursive traversal is visited. |
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125 traversedir = None |
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126 |
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127 def rel(self, f): |
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128 '''Convert repo path back to path that is relative to cwd of matcher.''' |
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129 return util.pathto(self._root, self._cwd, f) |
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130 |
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131 def files(self): |
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132 '''Explicitly listed files or patterns or roots: |
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133 if no patterns or .always(): empty list, |
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134 if exact: list exact files, |
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135 if not .anypats(): list all files and dirs, |
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136 else: optimal roots''' |
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137 return self._files |
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138 |
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139 def exact(self, f): |
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140 '''Returns True if f is in .files().''' |
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141 return f in self._fmap |
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142 |
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143 def anypats(self): |
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144 '''Matcher uses patterns or include/exclude.''' |
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145 return self._anypats |
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146 |
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147 def always(self): |
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148 '''Matcher will match everything and .files() will be empty |
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149 - optimization might be possible and necessary.''' |
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150 return self._always |
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152 class exact(match): |
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153 def __init__(self, root, cwd, files): |
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154 match.__init__(self, root, cwd, files, exact=True) |
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155 |
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156 class always(match): |
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157 def __init__(self, root, cwd): |
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158 match.__init__(self, root, cwd, []) |
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159 |
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160 class narrowmatcher(match): |
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161 """Adapt a matcher to work on a subdirectory only. |
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162 |
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163 The paths are remapped to remove/insert the path as needed: |
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164 |
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165 >>> m1 = match('root', '', ['a.txt', 'sub/b.txt']) |
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166 >>> m2 = narrowmatcher('sub', m1) |
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167 >>> bool(m2('a.txt')) |
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168 False |
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169 >>> bool(m2('b.txt')) |
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170 True |
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171 >>> bool(m2.matchfn('a.txt')) |
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172 False |
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173 >>> bool(m2.matchfn('b.txt')) |
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174 True |
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175 >>> m2.files() |
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176 ['b.txt'] |
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177 >>> m2.exact('b.txt') |
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178 True |
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179 >>> m2.rel('b.txt') |
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180 'b.txt' |
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181 >>> def bad(f, msg): |
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182 ... print "%s: %s" % (f, msg) |
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183 >>> m1.bad = bad |
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184 >>> m2.bad('x.txt', 'No such file') |
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185 sub/x.txt: No such file |
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186 """ |
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187 |
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188 def __init__(self, path, matcher): |
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189 self._root = matcher._root |
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190 self._cwd = matcher._cwd |
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191 self._path = path |
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192 self._matcher = matcher |
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193 self._always = matcher._always |
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194 |
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195 self._files = [f[len(path) + 1:] for f in matcher._files |
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196 if f.startswith(path + "/")] |
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197 self._anypats = matcher._anypats |
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198 self.matchfn = lambda fn: matcher.matchfn(self._path + "/" + fn) |
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199 self._fmap = set(self._files) |
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200 |
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201 def bad(self, f, msg): |
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202 self._matcher.bad(self._path + "/" + f, msg) |
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203 |
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204 def patkind(pattern, default=None): |
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205 '''If pattern is 'kind:pat' with a known kind, return kind.''' |
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206 return _patsplit(pattern, default)[0] |
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207 |
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208 def _patsplit(pattern, default): |
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209 """Split a string into the optional pattern kind prefix and the actual |
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210 pattern.""" |
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211 if ':' in pattern: |
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212 kind, pat = pattern.split(':', 1) |
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213 if kind in ('re', 'glob', 'path', 'relglob', 'relpath', 'relre', |
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214 'listfile', 'listfile0', 'set'): |
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215 return kind, pat |
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216 return default, pattern |
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217 |
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218 def _globre(pat): |
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219 r'''Convert an extended glob string to a regexp string. |
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220 |
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221 >>> print _globre(r'?') |
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222 . |
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223 >>> print _globre(r'*') |
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224 [^/]* |
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225 >>> print _globre(r'**') |
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226 .* |
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227 >>> print _globre(r'**/a') |
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228 (?:.*/)?a |
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229 >>> print _globre(r'a/**/b') |
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230 a\/(?:.*/)?b |
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231 >>> print _globre(r'[a*?!^][^b][!c]') |
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232 [a*?!^][\^b][^c] |
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233 >>> print _globre(r'{a,b}') |
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234 (?:a|b) |
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235 >>> print _globre(r'.\*\?') |
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236 \.\*\? |
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237 ''' |
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238 i, n = 0, len(pat) |
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239 res = '' |
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240 group = 0 |
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241 escape = util.re.escape |
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242 def peek(): |
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243 return i < n and pat[i] |
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244 while i < n: |
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245 c = pat[i] |
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246 i += 1 |
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247 if c not in '*?[{},\\': |
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248 res += escape(c) |
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249 elif c == '*': |
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250 if peek() == '*': |
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251 i += 1 |
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252 if peek() == '/': |
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253 i += 1 |
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254 res += '(?:.*/)?' |
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255 else: |
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256 res += '.*' |
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257 else: |
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258 res += '[^/]*' |
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259 elif c == '?': |
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260 res += '.' |
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261 elif c == '[': |
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262 j = i |
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263 if j < n and pat[j] in '!]': |
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264 j += 1 |
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265 while j < n and pat[j] != ']': |
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266 j += 1 |
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267 if j >= n: |
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268 res += '\\[' |
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269 else: |
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270 stuff = pat[i:j].replace('\\','\\\\') |
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271 i = j + 1 |
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272 if stuff[0] == '!': |
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273 stuff = '^' + stuff[1:] |
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274 elif stuff[0] == '^': |
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275 stuff = '\\' + stuff |
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276 res = '%s[%s]' % (res, stuff) |
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277 elif c == '{': |
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278 group += 1 |
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279 res += '(?:' |
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280 elif c == '}' and group: |
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281 res += ')' |
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282 group -= 1 |
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283 elif c == ',' and group: |
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284 res += '|' |
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285 elif c == '\\': |
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286 p = peek() |
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287 if p: |
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288 i += 1 |
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289 res += escape(p) |
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290 else: |
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291 res += escape(c) |
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292 else: |
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293 res += escape(c) |
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294 return res |
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295 |
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296 def _regex(kind, pat, globsuffix): |
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297 '''Convert a (normalized) pattern of any kind into a regular expression. |
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298 globsuffix is appended to the regexp of globs.''' |
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299 if not pat: |
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300 return '' |
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301 if kind == 're': |
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302 return pat |
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303 if kind == 'path': |
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304 return '^' + util.re.escape(pat) + '(?:/|$)' |
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305 if kind == 'relglob': |
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306 return '(?:|.*/)' + _globre(pat) + globsuffix |
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307 if kind == 'relpath': |
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308 return util.re.escape(pat) + '(?:/|$)' |
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309 if kind == 'relre': |
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310 if pat.startswith('^'): |
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311 return pat |
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312 return '.*' + pat |
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313 return _globre(pat) + globsuffix |
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314 |
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315 def _buildmatch(ctx, kindpats, globsuffix): |
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316 '''Return regexp string and a matcher function for kindpats. |
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317 globsuffix is appended to the regexp of globs.''' |
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318 fset, kindpats = _expandsets(kindpats, ctx) |
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319 if not kindpats: |
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320 return "", fset.__contains__ |
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321 |
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322 regex, mf = _buildregexmatch(kindpats, globsuffix) |
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323 if fset: |
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324 return regex, lambda f: f in fset or mf(f) |
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325 return regex, mf |
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326 |
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327 def _buildregexmatch(kindpats, globsuffix): |
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328 """Build a match function from a list of kinds and kindpats, |
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329 return regexp string and a matcher function.""" |
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330 try: |
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331 regex = '(?:%s)' % '|'.join([_regex(k, p, globsuffix) |
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332 for (k, p) in kindpats]) |
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333 if len(regex) > 20000: |
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334 raise OverflowError |
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335 return regex, _rematcher(regex) |
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336 except OverflowError: |
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337 # We're using a Python with a tiny regex engine and we |
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338 # made it explode, so we'll divide the pattern list in two |
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339 # until it works |
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340 l = len(kindpats) |
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341 if l < 2: |
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342 raise |
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343 regexa, a = _buildregexmatch(kindpats[:l//2], globsuffix) |
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344 regexb, b = _buildregexmatch(kindpats[l//2:], globsuffix) |
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345 return regex, lambda s: a(s) or b(s) |
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346 except re.error: |
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347 for k, p in kindpats: |
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348 try: |
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349 _rematcher('(?:%s)' % _regex(k, p, globsuffix)) |
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350 except re.error: |
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351 raise util.Abort(_("invalid pattern (%s): %s") % (k, p)) |
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352 raise util.Abort(_("invalid pattern")) |
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353 |
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354 def _normalize(patterns, default, root, cwd, auditor): |
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355 '''Convert 'kind:pat' from the patterns list to tuples with kind and |
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356 normalized and rooted patterns and with listfiles expanded.''' |
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357 kindpats = [] |
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358 for kind, pat in [_patsplit(p, default) for p in patterns]: |
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359 if kind in ('glob', 'relpath'): |
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360 pat = pathutil.canonpath(root, cwd, pat, auditor) |
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361 elif kind in ('relglob', 'path'): |
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362 pat = util.normpath(pat) |
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363 elif kind in ('listfile', 'listfile0'): |
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364 try: |
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365 files = util.readfile(pat) |
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366 if kind == 'listfile0': |
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367 files = files.split('\0') |
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368 else: |
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369 files = files.splitlines() |
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370 files = [f for f in files if f] |
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371 except EnvironmentError: |
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372 raise util.Abort(_("unable to read file list (%s)") % pat) |
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373 kindpats += _normalize(files, default, root, cwd, auditor) |
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374 continue |
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375 # else: re or relre - which cannot be normalized |
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376 kindpats.append((kind, pat)) |
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377 return kindpats |
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378 |
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379 def _roots(kindpats): |
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380 '''return roots and exact explicitly listed files from patterns |
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381 |
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382 >>> _roots([('glob', 'g/*'), ('glob', 'g'), ('glob', 'g*')]) |
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383 ['g', 'g', '.'] |
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384 >>> _roots([('relpath', 'r'), ('path', 'p/p'), ('path', '')]) |
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385 ['r', 'p/p', '.'] |
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386 >>> _roots([('relglob', 'rg*'), ('re', 're/'), ('relre', 'rr')]) |
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387 ['.', '.', '.'] |
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388 ''' |
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389 r = [] |
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390 for kind, pat in kindpats: |
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391 if kind == 'glob': # find the non-glob prefix |
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392 root = [] |
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393 for p in pat.split('/'): |
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394 if '[' in p or '{' in p or '*' in p or '?' in p: |
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395 break |
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396 root.append(p) |
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397 r.append('/'.join(root) or '.') |
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398 elif kind in ('relpath', 'path'): |
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399 r.append(pat or '.') |
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400 else: # relglob, re, relre |
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401 r.append('.') |
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402 return r |
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403 |
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404 def _anypats(kindpats): |
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405 for kind, pat in kindpats: |
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406 if kind in ('glob', 're', 'relglob', 'relre', 'set'): |
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407 return True |