Mercurial > hg
annotate mercurial/match.py @ 9183:d0225fa2f6c4
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author | Martin Geisler <mg@lazybytes.net> |
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date | Wed, 22 Jul 2009 22:50:34 +0200 |
parents | 0289f384e1e5 |
children | 32e678f9045f |
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 |
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6 # GNU General Public License version 2, incorporated herein by reference. |
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7 |
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8 import util, re |
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10 class match(object): |
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11 def __init__(self, root, cwd, patterns, include=[], exclude=[], |
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12 default='glob', exact=False): |
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13 """build an object to match a set of file patterns |
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14 |
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15 arguments: |
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16 root - the canonical root of the tree you're matching against |
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17 cwd - the current working directory, if relevant |
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18 patterns - patterns to find |
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19 include - patterns to include |
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20 exclude - patterns to exclude |
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21 default - if a pattern in names has no explicit type, assume this one |
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22 exact - patterns are actually literals |
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23 |
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24 a pattern is one of: |
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25 'glob:<glob>' - a glob relative to cwd |
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26 're:<regexp>' - a regular expression |
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27 'path:<path>' - a path relative to canonroot |
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28 'relglob:<glob>' - an unrooted glob (*.c matches C files in all dirs) |
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29 'relpath:<path>' - a path relative to cwd |
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30 'relre:<regexp>' - a regexp that needn't match the start of a name |
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31 '<something>' - a pattern of the specified default type |
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32 """ |
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33 |
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34 self._root = root |
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35 self._cwd = cwd |
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36 self._files = [] |
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37 self._anypats = bool(include or exclude) |
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38 |
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39 if include: |
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40 im = _buildmatch(_normalize(include, 'glob', root, cwd), '(?:/|$)') |
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41 if exclude: |
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42 em = _buildmatch(_normalize(exclude, 'glob', root, cwd), '(?:/|$)') |
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43 if exact: |
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44 self._files = patterns |
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45 pm = self.exact |
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46 elif patterns: |
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47 pats = _normalize(patterns, default, root, cwd) |
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48 self._files = _roots(pats) |
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49 self._anypats = self._anypats or _anypats(pats) |
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50 pm = _buildmatch(pats, '$') |
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51 |
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52 if patterns or exact: |
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53 if include: |
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54 if exclude: |
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55 m = lambda f: im(f) and not em(f) and pm(f) |
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56 else: |
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57 m = lambda f: im(f) and pm(f) |
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58 else: |
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59 if exclude: |
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60 m = lambda f: not em(f) and pm(f) |
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61 else: |
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62 m = pm |
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63 else: |
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64 if include: |
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65 if exclude: |
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66 m = lambda f: im(f) and not em(f) |
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67 else: |
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68 m = im |
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69 else: |
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70 if exclude: |
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71 m = lambda f: not em(f) |
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72 else: |
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73 m = lambda f: True |
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74 |
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75 self.matchfn = m |
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76 self._fmap = set(self._files) |
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77 |
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78 def __call__(self, fn): |
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79 return self.matchfn(fn) |
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80 def __iter__(self): |
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81 for f in self._files: |
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82 yield f |
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83 def bad(self, f, msg): |
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84 '''callback for each explicit file that can't be |
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85 found/accessed, with an error message |
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86 ''' |
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87 pass |
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88 def dir(self, f): |
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89 pass |
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90 def missing(self, f): |
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91 pass |
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92 def exact(self, f): |
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93 return f in self._fmap |
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94 def rel(self, f): |
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95 return util.pathto(self._root, self._cwd, f) |
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96 def files(self): |
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97 return self._files |
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98 def anypats(self): |
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99 return self._anypats |
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101 class exact(match): |
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102 def __init__(self, root, cwd, files): |
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103 match.__init__(self, root, cwd, files, exact = True) |
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104 |
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105 class always(match): |
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106 def __init__(self, root, cwd): |
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107 match.__init__(self, root, cwd, []) |
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108 |
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110 return _patsplit(pat, None)[0] |
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111 |
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112 def _patsplit(pat, default): |
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113 """Split a string into an optional pattern kind prefix and the |
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114 actual pattern.""" |
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116 kind, val = pat.split(':', 1) |
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117 if kind in ('re', 'glob', 'path', 'relglob', 'relpath', 'relre'): |
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118 return kind, val |
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119 return default, pat |
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120 |
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121 def _globre(pat): |
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122 "convert a glob pattern into a regexp" |
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123 i, n = 0, len(pat) |
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124 res = '' |
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125 group = 0 |
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126 escape = re.escape |
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127 def peek(): return i < n and pat[i] |
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128 while i < n: |
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129 c = pat[i] |
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130 i = i+1 |
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131 if c not in '*?[{},\\': |
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132 res += escape(c) |
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133 elif c == '*': |
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134 if peek() == '*': |
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135 i += 1 |
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136 res += '.*' |
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137 else: |
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138 res += '[^/]*' |
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139 elif c == '?': |
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140 res += '.' |
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141 elif c == '[': |
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142 j = i |
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143 if j < n and pat[j] in '!]': |
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144 j += 1 |
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145 while j < n and pat[j] != ']': |
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146 j += 1 |
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147 if j >= n: |
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148 res += '\\[' |
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149 else: |
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150 stuff = pat[i:j].replace('\\','\\\\') |
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151 i = j + 1 |
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152 if stuff[0] == '!': |
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153 stuff = '^' + stuff[1:] |
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154 elif stuff[0] == '^': |
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155 stuff = '\\' + stuff |
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156 res = '%s[%s]' % (res, stuff) |
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157 elif c == '{': |
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158 group += 1 |
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159 res += '(?:' |
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160 elif c == '}' and group: |
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161 res += ')' |
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162 group -= 1 |
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163 elif c == ',' and group: |
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164 res += '|' |
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165 elif c == '\\': |
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166 p = peek() |
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167 if p: |
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168 i += 1 |
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169 res += escape(p) |
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170 else: |
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171 res += escape(c) |
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172 else: |
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173 res += escape(c) |
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174 return res |
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175 |
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176 def _regex(kind, name, tail): |
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177 '''convert a pattern into a regular expression''' |
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178 if not name: |
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179 return '' |
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180 if kind == 're': |
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181 return name |
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182 elif kind == 'path': |
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183 return '^' + re.escape(name) + '(?:/|$)' |
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184 elif kind == 'relglob': |
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185 return '(?:|.*/)' + _globre(name) + tail |
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186 elif kind == 'relpath': |
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187 return re.escape(name) + '(?:/|$)' |
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188 elif kind == 'relre': |
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189 if name.startswith('^'): |
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190 return name |
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191 return '.*' + name |
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192 return _globre(name) + tail |
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193 |
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194 def _buildmatch(pats, tail): |
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195 """build a matching function from a set of patterns""" |
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196 try: |
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197 pat = '(?:%s)' % '|'.join([_regex(k, p, tail) for (k, p) in pats]) |
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198 if len(pat) > 20000: |
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199 raise OverflowError() |
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200 return re.compile(pat).match |
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201 except OverflowError: |
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202 # We're using a Python with a tiny regex engine and we |
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203 # made it explode, so we'll divide the pattern list in two |
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204 # until it works |
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205 l = len(pats) |
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206 if l < 2: |
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207 raise |
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208 a, b = _buildmatch(pats[:l//2], tail), _buildmatch(pats[l//2:], tail) |
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209 return lambda s: a(s) or b(s) |
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210 except re.error: |
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211 for k, p in pats: |
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212 try: |
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213 re.compile('(?:%s)' % _regex(k, p, tail)) |
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214 except re.error: |
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215 raise util.Abort("invalid pattern (%s): %s" % (k, p)) |
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216 raise util.Abort("invalid pattern") |
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217 |
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219 pats = [] |
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220 for kind, name in [_patsplit(p, default) for p in names]: |
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221 if kind in ('glob', 'relpath'): |
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223 elif kind in ('relglob', 'path'): |
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224 name = util.normpath(name) |
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225 |
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226 pats.append((kind, name)) |
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227 return pats |
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228 |
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229 def _roots(patterns): |
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230 r = [] |
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231 for kind, name in patterns: |
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232 if kind == 'glob': # find the non-glob prefix |
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233 root = [] |
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234 for p in name.split('/'): |
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235 if '[' in p or '{' in p or '*' in p or '?' in p: |
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236 break |
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237 root.append(p) |
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238 r.append('/'.join(root) or '.') |
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239 elif kind in ('relpath', 'path'): |
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240 r.append(name or '.') |
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241 elif kind == 'relglob': |
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242 r.append('.') |
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243 return r |
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244 |
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245 def _anypats(patterns): |
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246 for kind, name in patterns: |
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247 if kind in ('glob', 're', 'relglob', 'relre'): |
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248 return True |