Mercurial > hg
annotate mercurial/match.py @ 17509:f7767f52e9eb
spelling: recursion
author | timeless@mozdev.org |
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date | Fri, 17 Aug 2012 13:58:18 -0700 |
parents | 8d08a28aa63e |
children | e95ec38f86b0 |
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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 scmutil, util, fileset |
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10 from i18n import _ |
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12 def _rematcher(pat): |
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13 m = util.compilere(pat) |
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14 try: |
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15 # slightly faster, provided by facebook's re2 bindings |
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16 return m.test_match |
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17 except AttributeError: |
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18 return m.match |
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19 |
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20 def _expandsets(pats, ctx): |
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21 '''convert set: patterns into a list of files in the given context''' |
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22 fset = set() |
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23 other = [] |
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24 |
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25 for kind, expr in pats: |
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26 if kind == 'set': |
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27 if not ctx: |
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28 raise util.Abort("fileset expression with no context") |
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29 s = fileset.getfileset(ctx, expr) |
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30 fset.update(s) |
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31 continue |
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32 other.append((kind, expr)) |
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33 return fset, other |
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34 |
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35 class match(object): |
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36 def __init__(self, root, cwd, patterns, include=[], exclude=[], |
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37 default='glob', exact=False, auditor=None, ctx=None): |
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38 """build an object to match a set of file patterns |
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39 |
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40 arguments: |
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41 root - the canonical root of the tree you're matching against |
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42 cwd - the current working directory, if relevant |
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43 patterns - patterns to find |
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44 include - patterns to include |
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45 exclude - patterns to exclude |
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46 default - if a pattern in names has no explicit type, assume this one |
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47 exact - patterns are actually literals |
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48 |
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49 a pattern is one of: |
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50 'glob:<glob>' - a glob relative to cwd |
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51 're:<regexp>' - a regular expression |
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52 'path:<path>' - a path relative to canonroot |
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53 'relglob:<glob>' - an unrooted glob (*.c matches C files in all dirs) |
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54 'relpath:<path>' - a path relative to cwd |
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55 'relre:<regexp>' - a regexp that needn't match the start of a name |
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56 'set:<fileset>' - a fileset expression |
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57 '<something>' - a pattern of the specified default type |
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58 """ |
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59 |
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60 self._root = root |
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61 self._cwd = cwd |
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62 self._files = [] |
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63 self._anypats = bool(include or exclude) |
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64 self._ctx = ctx |
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65 |
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66 if include: |
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67 pats = _normalize(include, 'glob', root, cwd, auditor) |
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68 self.includepat, im = _buildmatch(ctx, pats, '(?:/|$)') |
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69 if exclude: |
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70 pats = _normalize(exclude, 'glob', root, cwd, auditor) |
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71 self.excludepat, em = _buildmatch(ctx, pats, '(?:/|$)') |
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72 if exact: |
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73 if isinstance(patterns, list): |
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74 self._files = patterns |
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75 else: |
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76 self._files = list(patterns) |
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77 pm = self.exact |
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78 elif patterns: |
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79 pats = _normalize(patterns, default, root, cwd, auditor) |
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80 self._files = _roots(pats) |
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81 self._anypats = self._anypats or _anypats(pats) |
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82 self.patternspat, pm = _buildmatch(ctx, pats, '$') |
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83 |
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84 if patterns or exact: |
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85 if include: |
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86 if exclude: |
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87 m = lambda f: im(f) and not em(f) and pm(f) |
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88 else: |
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89 m = lambda f: im(f) and pm(f) |
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90 else: |
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91 if exclude: |
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92 m = lambda f: not em(f) and pm(f) |
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93 else: |
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94 m = pm |
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95 else: |
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96 if include: |
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97 if exclude: |
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98 m = lambda f: im(f) and not em(f) |
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99 else: |
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100 m = im |
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101 else: |
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102 if exclude: |
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103 m = lambda f: not em(f) |
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104 else: |
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105 m = lambda f: True |
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106 |
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107 self.matchfn = m |
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108 self._fmap = set(self._files) |
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109 |
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110 def __call__(self, fn): |
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111 return self.matchfn(fn) |
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112 def __iter__(self): |
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113 for f in self._files: |
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114 yield f |
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115 def bad(self, f, msg): |
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116 '''callback for each explicit file that can't be |
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117 found/accessed, with an error message |
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118 ''' |
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119 pass |
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120 def dir(self, f): |
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121 pass |
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122 def missing(self, f): |
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123 pass |
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124 def exact(self, f): |
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125 return f in self._fmap |
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126 def rel(self, f): |
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127 return util.pathto(self._root, self._cwd, f) |
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128 def files(self): |
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129 return self._files |
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130 def anypats(self): |
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131 return self._anypats |
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132 def always(self): |
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133 return False |
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135 class exact(match): |
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136 def __init__(self, root, cwd, files): |
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137 match.__init__(self, root, cwd, files, exact = True) |
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138 |
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139 class always(match): |
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140 def __init__(self, root, cwd): |
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141 match.__init__(self, root, cwd, []) |
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142 def always(self): |
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143 return True |
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144 |
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145 class narrowmatcher(match): |
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146 """Adapt a matcher to work on a subdirectory only. |
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147 |
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148 The paths are remapped to remove/insert the path as needed: |
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149 |
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150 >>> m1 = match('root', '', ['a.txt', 'sub/b.txt']) |
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151 >>> m2 = narrowmatcher('sub', m1) |
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152 >>> bool(m2('a.txt')) |
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153 False |
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154 >>> bool(m2('b.txt')) |
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155 True |
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156 >>> bool(m2.matchfn('a.txt')) |
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157 False |
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158 >>> bool(m2.matchfn('b.txt')) |
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159 True |
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160 >>> m2.files() |
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161 ['b.txt'] |
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162 >>> m2.exact('b.txt') |
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163 True |
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164 >>> m2.rel('b.txt') |
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165 'b.txt' |
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166 >>> def bad(f, msg): |
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167 ... print "%s: %s" % (f, msg) |
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168 >>> m1.bad = bad |
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169 >>> m2.bad('x.txt', 'No such file') |
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170 sub/x.txt: No such file |
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171 """ |
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172 |
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173 def __init__(self, path, matcher): |
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174 self._root = matcher._root |
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175 self._cwd = matcher._cwd |
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176 self._path = path |
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177 self._matcher = matcher |
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178 |
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179 self._files = [f[len(path) + 1:] for f in matcher._files |
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180 if f.startswith(path + "/")] |
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181 self._anypats = matcher._anypats |
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182 self.matchfn = lambda fn: matcher.matchfn(self._path + "/" + fn) |
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183 self._fmap = set(self._files) |
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184 |
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185 def bad(self, f, msg): |
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186 self._matcher.bad(self._path + "/" + f, msg) |
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187 |
8568 | 188 def patkind(pat): |
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189 return _patsplit(pat, None)[0] |
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190 |
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191 def _patsplit(pat, default): |
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192 """Split a string into an optional pattern kind prefix and the |
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193 actual pattern.""" |
8579 | 194 if ':' in pat: |
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|
195 kind, val = pat.split(':', 1) |
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|
196 if kind in ('re', 'glob', 'path', 'relglob', 'relpath', 'relre', |
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|
197 'listfile', 'listfile0', 'set'): |
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198 return kind, val |
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199 return default, pat |
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|
200 |
8582
a4c199e12b5a
match: remove head and tail args from _globre
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8581
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|
201 def _globre(pat): |
8570
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202 "convert a glob pattern into a regexp" |
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203 i, n = 0, len(pat) |
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204 res = '' |
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|
205 group = 0 |
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|
206 escape = re.escape |
10282
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|
207 def peek(): |
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208 return i < n and pat[i] |
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|
209 while i < n: |
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210 c = pat[i] |
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|
211 i += 1 |
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212 if c not in '*?[{},\\': |
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|
213 res += escape(c) |
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214 elif c == '*': |
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|
215 if peek() == '*': |
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216 i += 1 |
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217 res += '.*' |
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218 else: |
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219 res += '[^/]*' |
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220 elif c == '?': |
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221 res += '.' |
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222 elif c == '[': |
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223 j = i |
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224 if j < n and pat[j] in '!]': |
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225 j += 1 |
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226 while j < n and pat[j] != ']': |
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227 j += 1 |
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228 if j >= n: |
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229 res += '\\[' |
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230 else: |
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231 stuff = pat[i:j].replace('\\','\\\\') |
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232 i = j + 1 |
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233 if stuff[0] == '!': |
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234 stuff = '^' + stuff[1:] |
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235 elif stuff[0] == '^': |
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|
236 stuff = '\\' + stuff |
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237 res = '%s[%s]' % (res, stuff) |
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238 elif c == '{': |
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239 group += 1 |
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240 res += '(?:' |
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241 elif c == '}' and group: |
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242 res += ')' |
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243 group -= 1 |
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244 elif c == ',' and group: |
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245 res += '|' |
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246 elif c == '\\': |
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247 p = peek() |
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248 if p: |
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249 i += 1 |
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250 res += escape(p) |
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251 else: |
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252 res += escape(c) |
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253 else: |
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254 res += escape(c) |
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255 return res |
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256 |
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257 def _regex(kind, name, tail): |
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258 '''convert a pattern into a regular expression''' |
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259 if not name: |
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260 return '' |
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261 if kind == 're': |
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262 return name |
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263 elif kind == 'path': |
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264 return '^' + re.escape(name) + '(?:/|$)' |
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265 elif kind == 'relglob': |
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266 return '(?:|.*/)' + _globre(name) + tail |
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267 elif kind == 'relpath': |
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268 return re.escape(name) + '(?:/|$)' |
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269 elif kind == 'relre': |
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270 if name.startswith('^'): |
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271 return name |
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272 return '.*' + name |
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273 return _globre(name) + tail |
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274 |
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275 def _buildmatch(ctx, pats, tail): |
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276 fset, pats = _expandsets(pats, ctx) |
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277 if not pats: |
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278 return "", fset.__contains__ |
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279 |
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280 pat, mf = _buildregexmatch(pats, tail) |
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281 if fset: |
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282 return pat, lambda f: f in fset or mf(f) |
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283 return pat, mf |
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284 |
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285 def _buildregexmatch(pats, tail): |
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286 """build a matching function from a set of patterns""" |
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287 try: |
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288 pat = '(?:%s)' % '|'.join([_regex(k, p, tail) for (k, p) in pats]) |
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289 if len(pat) > 20000: |
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cleanup: "raise SomeException()" -> "raise SomeException"
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290 raise OverflowError |
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291 return pat, _rematcher(pat) |
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292 except OverflowError: |
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293 # We're using a Python with a tiny regex engine and we |
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294 # made it explode, so we'll divide the pattern list in two |
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295 # until it works |
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296 l = len(pats) |
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297 if l < 2: |
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298 raise |
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299 pata, a = _buildregexmatch(pats[:l//2], tail) |
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300 patb, b = _buildregexmatch(pats[l//2:], tail) |
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add debugignore which yields the combined ignore patten of the .hgignore files
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301 return pat, lambda s: a(s) or b(s) |
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302 except re.error: |
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303 for k, p in pats: |
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304 try: |
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305 _rematcher('(?:%s)' % _regex(k, p, tail)) |
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306 except re.error: |
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307 raise util.Abort(_("invalid pattern (%s): %s") % (k, p)) |
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308 raise util.Abort(_("invalid pattern")) |
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309 |
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310 def _normalize(names, default, root, cwd, auditor): |
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311 pats = [] |
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312 for kind, name in [_patsplit(p, default) for p in names]: |
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313 if kind in ('glob', 'relpath'): |
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bfeaa88b875d
move canonpath from util to scmutil
Adrian Buehlmann <adrian@cadifra.com>
parents:
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diff
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314 name = scmutil.canonpath(root, cwd, name, auditor) |
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315 elif kind in ('relglob', 'path'): |
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316 name = util.normpath(name) |
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317 elif kind in ('listfile', 'listfile0'): |
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318 try: |
14248
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319 files = util.readfile(name) |
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320 if kind == 'listfile0': |
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321 files = files.split('\0') |
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322 else: |
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|
323 files = files.splitlines() |
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324 files = [f for f in files if f] |
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325 except EnvironmentError: |
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326 raise util.Abort(_("unable to read file list (%s)") % name) |
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327 pats += _normalize(files, default, root, cwd, auditor) |
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328 continue |
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329 |
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330 pats.append((kind, name)) |
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331 return pats |
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332 |
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333 def _roots(patterns): |
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334 r = [] |
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335 for kind, name in patterns: |
8584
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336 if kind == 'glob': # find the non-glob prefix |
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337 root = [] |
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338 for p in name.split('/'): |
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339 if '[' in p or '{' in p or '*' in p or '?' in p: |
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340 break |
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341 root.append(p) |
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342 r.append('/'.join(root) or '.') |
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343 elif kind in ('relpath', 'path'): |
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344 r.append(name or '.') |
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345 elif kind == 'relglob': |
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346 r.append('.') |
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347 return r |
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348 |
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349 def _anypats(patterns): |
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350 for kind, name in patterns: |
16182
bd12ef347680
match: consider filesets as "anypats"
Patrick Mezard <patrick@mezard.eu>
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15029
diff
changeset
|
351 if kind in ('glob', 're', 'relglob', 'relre', 'set'): |
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352 return True |