annotate mercurial/match.py @ 11632:f418d2570920

log: document the different phases in walkchangerevs
author Nicolas Dumazet <nicdumz.commits@gmail.com>
date Tue, 20 Jul 2010 14:32:33 +0900
parents 08a0f04b56bd
children b046b90c4ae5
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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 or any later version.
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7
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8 import re
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9 import util
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10
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11 class match(object):
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12 def __init__(self, root, cwd, patterns, include=[], exclude=[],
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13 default='glob', exact=False):
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14 """build an object to match a set of file patterns
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15
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16 arguments:
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17 root - the canonical root of the tree you're matching against
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18 cwd - the current working directory, if relevant
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19 patterns - patterns to find
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20 include - patterns to include
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21 exclude - patterns to exclude
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22 default - if a pattern in names has no explicit type, assume this one
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23 exact - patterns are actually literals
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24
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25 a pattern is one of:
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26 'glob:<glob>' - a glob relative to cwd
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27 're:<regexp>' - a regular expression
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28 'path:<path>' - a path relative to canonroot
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29 'relglob:<glob>' - an unrooted glob (*.c matches C files in all dirs)
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30 'relpath:<path>' - a path relative to cwd
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31 'relre:<regexp>' - a regexp that needn't match the start of a name
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32 '<something>' - a pattern of the specified default type
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33 """
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34
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35 self._root = root
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36 self._cwd = cwd
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37 self._files = []
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38 self._anypats = bool(include or exclude)
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39
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40 if include:
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41 im = _buildmatch(_normalize(include, 'glob', root, cwd), '(?:/|$)')
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42 if exclude:
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43 em = _buildmatch(_normalize(exclude, 'glob', root, cwd), '(?:/|$)')
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44 if exact:
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45 self._files = patterns
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46 pm = self.exact
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47 elif patterns:
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48 pats = _normalize(patterns, default, root, cwd)
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49 self._files = _roots(pats)
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50 self._anypats = self._anypats or _anypats(pats)
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51 pm = _buildmatch(pats, '$')
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52
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53 if patterns or exact:
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54 if include:
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55 if exclude:
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56 m = lambda f: im(f) and not em(f) and pm(f)
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57 else:
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58 m = lambda f: im(f) and pm(f)
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59 else:
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60 if exclude:
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61 m = lambda f: not em(f) and pm(f)
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62 else:
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63 m = pm
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64 else:
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65 if include:
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66 if exclude:
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67 m = lambda f: im(f) and not em(f)
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68 else:
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69 m = im
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70 else:
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71 if exclude:
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72 m = lambda f: not em(f)
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73 else:
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74 m = lambda f: True
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75
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76 self.matchfn = m
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77 self._fmap = set(self._files)
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78
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79 def __call__(self, fn):
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80 return self.matchfn(fn)
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81 def __iter__(self):
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82 for f in self._files:
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83 yield f
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84 def bad(self, f, msg):
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85 '''callback for each explicit file that can't be
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86 found/accessed, with an error message
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87 '''
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88 pass
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89 def dir(self, f):
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90 pass
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91 def missing(self, f):
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92 pass
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93 def exact(self, f):
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94 return f in self._fmap
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95 def rel(self, f):
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96 return util.pathto(self._root, self._cwd, f)
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97 def files(self):
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98 return self._files
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99 def anypats(self):
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100 return self._anypats
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101
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102 class exact(match):
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103 def __init__(self, root, cwd, files):
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104 match.__init__(self, root, cwd, files, exact = True)
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105
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106 class always(match):
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107 def __init__(self, root, cwd):
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108 match.__init__(self, root, cwd, [])
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109
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110 def patkind(pat):
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111 return _patsplit(pat, None)[0]
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112
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113 def _patsplit(pat, default):
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114 """Split a string into an optional pattern kind prefix and the
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115 actual pattern."""
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116 if ':' in pat:
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117 kind, val = pat.split(':', 1)
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118 if kind in ('re', 'glob', 'path', 'relglob', 'relpath', 'relre'):
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119 return kind, val
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120 return default, pat
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121
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122 def _globre(pat):
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123 "convert a glob pattern into a regexp"
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124 i, n = 0, len(pat)
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125 res = ''
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126 group = 0
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127 escape = re.escape
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128 def peek():
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129 return i < n and pat[i]
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130 while i < n:
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131 c = pat[i]
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132 i += 1
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133 if c not in '*?[{},\\':
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134 res += escape(c)
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135 elif c == '*':
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136 if peek() == '*':
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137 i += 1
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138 res += '.*'
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139 else:
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140 res += '[^/]*'
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141 elif c == '?':
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142 res += '.'
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143 elif c == '[':
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144 j = i
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parents: 8568
diff changeset
145 if j < n and pat[j] in '!]':
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parents: 8568
diff changeset
146 j += 1
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Matt Mackall <mpm@selenic.com>
parents: 8568
diff changeset
147 while j < n and pat[j] != ']':
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parents: 8568
diff changeset
148 j += 1
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parents: 8568
diff changeset
149 if j >= n:
7fe2012b3bd0 match: move util match functions over
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parents: 8568
diff changeset
150 res += '\\['
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parents: 8568
diff changeset
151 else:
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Matt Mackall <mpm@selenic.com>
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diff changeset
152 stuff = pat[i:j].replace('\\','\\\\')
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diff changeset
153 i = j + 1
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parents: 8568
diff changeset
154 if stuff[0] == '!':
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Matt Mackall <mpm@selenic.com>
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diff changeset
155 stuff = '^' + stuff[1:]
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diff changeset
156 elif stuff[0] == '^':
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diff changeset
157 stuff = '\\' + stuff
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parents: 8568
diff changeset
158 res = '%s[%s]' % (res, stuff)
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parents: 8568
diff changeset
159 elif c == '{':
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Matt Mackall <mpm@selenic.com>
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diff changeset
160 group += 1
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parents: 8568
diff changeset
161 res += '(?:'
7fe2012b3bd0 match: move util match functions over
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diff changeset
162 elif c == '}' and group:
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parents: 8568
diff changeset
163 res += ')'
7fe2012b3bd0 match: move util match functions over
Matt Mackall <mpm@selenic.com>
parents: 8568
diff changeset
164 group -= 1
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parents: 8568
diff changeset
165 elif c == ',' and group:
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diff changeset
166 res += '|'
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diff changeset
167 elif c == '\\':
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diff changeset
168 p = peek()
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diff changeset
169 if p:
7fe2012b3bd0 match: move util match functions over
Matt Mackall <mpm@selenic.com>
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diff changeset
170 i += 1
8583
19d1b2aec562 match: optimize escaping in _globre
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diff changeset
171 res += escape(p)
8570
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diff changeset
172 else:
8583
19d1b2aec562 match: optimize escaping in _globre
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parents: 8582
diff changeset
173 res += escape(c)
8570
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parents: 8568
diff changeset
174 else:
8583
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Matt Mackall <mpm@selenic.com>
parents: 8582
diff changeset
175 res += escape(c)
8582
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Matt Mackall <mpm@selenic.com>
parents: 8581
diff changeset
176 return res
8570
7fe2012b3bd0 match: move util match functions over
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diff changeset
177
8574
63a7ed2128d5 match: unnest functions in _matcher
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diff changeset
178 def _regex(kind, name, tail):
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diff changeset
179 '''convert a pattern into a regular expression'''
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diff changeset
180 if not name:
63a7ed2128d5 match: unnest functions in _matcher
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diff changeset
181 return ''
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diff changeset
182 if kind == 're':
63a7ed2128d5 match: unnest functions in _matcher
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diff changeset
183 return name
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
184 elif kind == 'path':
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diff changeset
185 return '^' + re.escape(name) + '(?:/|$)'
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parents: 8573
diff changeset
186 elif kind == 'relglob':
8582
a4c199e12b5a match: remove head and tail args from _globre
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parents: 8581
diff changeset
187 return '(?:|.*/)' + _globre(name) + tail
8574
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
188 elif kind == 'relpath':
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
189 return re.escape(name) + '(?:/|$)'
63a7ed2128d5 match: unnest functions in _matcher
Matt Mackall <mpm@selenic.com>
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diff changeset
190 elif kind == 'relre':
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
191 if name.startswith('^'):
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diff changeset
192 return name
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
193 return '.*' + name
8582
a4c199e12b5a match: remove head and tail args from _globre
Matt Mackall <mpm@selenic.com>
parents: 8581
diff changeset
194 return _globre(name) + tail
8574
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
195
8580
f648c096f6d0 match: rename _matchfn to _buildmatch
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parents: 8579
diff changeset
196 def _buildmatch(pats, tail):
8574
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
197 """build a matching function from a set of patterns"""
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
198 try:
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
199 pat = '(?:%s)' % '|'.join([_regex(k, p, tail) for (k, p) in pats])
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
200 if len(pat) > 20000:
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
201 raise OverflowError()
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
202 return re.compile(pat).match
63a7ed2128d5 match: unnest functions in _matcher
Matt Mackall <mpm@selenic.com>
parents: 8573
diff changeset
203 except OverflowError:
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
204 # We're using a Python with a tiny regex engine and we
63a7ed2128d5 match: unnest functions in _matcher
Matt Mackall <mpm@selenic.com>
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diff changeset
205 # made it explode, so we'll divide the pattern list in two
63a7ed2128d5 match: unnest functions in _matcher
Matt Mackall <mpm@selenic.com>
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diff changeset
206 # until it works
63a7ed2128d5 match: unnest functions in _matcher
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diff changeset
207 l = len(pats)
63a7ed2128d5 match: unnest functions in _matcher
Matt Mackall <mpm@selenic.com>
parents: 8573
diff changeset
208 if l < 2:
63a7ed2128d5 match: unnest functions in _matcher
Matt Mackall <mpm@selenic.com>
parents: 8573
diff changeset
209 raise
8580
f648c096f6d0 match: rename _matchfn to _buildmatch
Matt Mackall <mpm@selenic.com>
parents: 8579
diff changeset
210 a, b = _buildmatch(pats[:l//2], tail), _buildmatch(pats[l//2:], tail)
8574
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
211 return lambda s: a(s) or b(s)
63a7ed2128d5 match: unnest functions in _matcher
Matt Mackall <mpm@selenic.com>
parents: 8573
diff changeset
212 except re.error:
63a7ed2128d5 match: unnest functions in _matcher
Matt Mackall <mpm@selenic.com>
parents: 8573
diff changeset
213 for k, p in pats:
63a7ed2128d5 match: unnest functions in _matcher
Matt Mackall <mpm@selenic.com>
parents: 8573
diff changeset
214 try:
63a7ed2128d5 match: unnest functions in _matcher
Matt Mackall <mpm@selenic.com>
parents: 8573
diff changeset
215 re.compile('(?:%s)' % _regex(k, p, tail))
63a7ed2128d5 match: unnest functions in _matcher
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diff changeset
216 except re.error:
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
217 raise util.Abort("invalid pattern (%s): %s" % (k, p))
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parents: 8573
diff changeset
218 raise util.Abort("invalid pattern")
63a7ed2128d5 match: unnest functions in _matcher
Matt Mackall <mpm@selenic.com>
parents: 8573
diff changeset
219
8578
8388ef8d21cd match: tweak some names
Matt Mackall <mpm@selenic.com>
parents: 8577
diff changeset
220 def _normalize(names, default, root, cwd):
8574
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
221 pats = []
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
222 for kind, name in [_patsplit(p, default) for p in names]:
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
223 if kind in ('glob', 'relpath'):
8578
8388ef8d21cd match: tweak some names
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parents: 8577
diff changeset
224 name = util.canonpath(root, cwd, name)
8574
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
225 elif kind in ('relglob', 'path'):
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
226 name = util.normpath(name)
63a7ed2128d5 match: unnest functions in _matcher
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parents: 8573
diff changeset
227
63a7ed2128d5 match: unnest functions in _matcher
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diff changeset
228 pats.append((kind, name))
8576
ec4ed21db4b2 match: split up _normalizepats
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parents: 8575
diff changeset
229 return pats
8574
63a7ed2128d5 match: unnest functions in _matcher
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diff changeset
230
8576
ec4ed21db4b2 match: split up _normalizepats
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diff changeset
231 def _roots(patterns):
ec4ed21db4b2 match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents: 8575
diff changeset
232 r = []
ec4ed21db4b2 match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents: 8575
diff changeset
233 for kind, name in patterns:
8584
0f06e72abfdc match: fold _globprefix into _roots
Matt Mackall <mpm@selenic.com>
parents: 8583
diff changeset
234 if kind == 'glob': # find the non-glob prefix
0f06e72abfdc match: fold _globprefix into _roots
Matt Mackall <mpm@selenic.com>
parents: 8583
diff changeset
235 root = []
0f06e72abfdc match: fold _globprefix into _roots
Matt Mackall <mpm@selenic.com>
parents: 8583
diff changeset
236 for p in name.split('/'):
0f06e72abfdc match: fold _globprefix into _roots
Matt Mackall <mpm@selenic.com>
parents: 8583
diff changeset
237 if '[' in p or '{' in p or '*' in p or '?' in p:
0f06e72abfdc match: fold _globprefix into _roots
Matt Mackall <mpm@selenic.com>
parents: 8583
diff changeset
238 break
0f06e72abfdc match: fold _globprefix into _roots
Matt Mackall <mpm@selenic.com>
parents: 8583
diff changeset
239 root.append(p)
0f06e72abfdc match: fold _globprefix into _roots
Matt Mackall <mpm@selenic.com>
parents: 8583
diff changeset
240 r.append('/'.join(root) or '.')
8574
63a7ed2128d5 match: unnest functions in _matcher
Matt Mackall <mpm@selenic.com>
parents: 8573
diff changeset
241 elif kind in ('relpath', 'path'):
8576
ec4ed21db4b2 match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents: 8575
diff changeset
242 r.append(name or '.')
8574
63a7ed2128d5 match: unnest functions in _matcher
Matt Mackall <mpm@selenic.com>
parents: 8573
diff changeset
243 elif kind == 'relglob':
8576
ec4ed21db4b2 match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents: 8575
diff changeset
244 r.append('.')
ec4ed21db4b2 match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents: 8575
diff changeset
245 return r
ec4ed21db4b2 match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents: 8575
diff changeset
246
ec4ed21db4b2 match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents: 8575
diff changeset
247 def _anypats(patterns):
ec4ed21db4b2 match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents: 8575
diff changeset
248 for kind, name in patterns:
ec4ed21db4b2 match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents: 8575
diff changeset
249 if kind in ('glob', 're', 'relglob', 'relre'):
ec4ed21db4b2 match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents: 8575
diff changeset
250 return True