author | Nishanth Amuluru <nishanth@fossee.in> |
Sat, 08 Jan 2011 11:20:57 +0530 | |
changeset 69 | c6bca38c1cbf |
permissions | -rw-r--r-- |
69
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# match.py - filename matching |
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# |
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# Copyright 2008, 2009 Matt Mackall <mpm@selenic.com> and others |
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# |
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# This software may be used and distributed according to the terms of the |
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# GNU General Public License version 2 or any later version. |
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import re |
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import util |
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from i18n import _ |
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|
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class match(object): |
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def __init__(self, root, cwd, patterns, include=[], exclude=[], |
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default='glob', exact=False, auditor=None): |
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"""build an object to match a set of file patterns |
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|
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arguments: |
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root - the canonical root of the tree you're matching against |
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cwd - the current working directory, if relevant |
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patterns - patterns to find |
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include - patterns to include |
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exclude - patterns to exclude |
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default - if a pattern in names has no explicit type, assume this one |
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exact - patterns are actually literals |
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|
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a pattern is one of: |
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'glob:<glob>' - a glob relative to cwd |
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're:<regexp>' - a regular expression |
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'path:<path>' - a path relative to canonroot |
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'relglob:<glob>' - an unrooted glob (*.c matches C files in all dirs) |
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'relpath:<path>' - a path relative to cwd |
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'relre:<regexp>' - a regexp that needn't match the start of a name |
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'<something>' - a pattern of the specified default type |
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""" |
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self._root = root |
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self._cwd = cwd |
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self._files = [] |
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self._anypats = bool(include or exclude) |
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|
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if include: |
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im = _buildmatch(_normalize(include, 'glob', root, cwd, auditor), |
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'(?:/|$)') |
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if exclude: |
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em = _buildmatch(_normalize(exclude, 'glob', root, cwd, auditor), |
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'(?:/|$)') |
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if exact: |
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self._files = patterns |
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pm = self.exact |
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elif patterns: |
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pats = _normalize(patterns, default, root, cwd, auditor) |
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self._files = _roots(pats) |
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self._anypats = self._anypats or _anypats(pats) |
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pm = _buildmatch(pats, '$') |
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|
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if patterns or exact: |
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if include: |
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if exclude: |
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m = lambda f: im(f) and not em(f) and pm(f) |
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else: |
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m = lambda f: im(f) and pm(f) |
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else: |
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if exclude: |
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m = lambda f: not em(f) and pm(f) |
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else: |
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m = pm |
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else: |
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if include: |
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if exclude: |
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m = lambda f: im(f) and not em(f) |
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else: |
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m = im |
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else: |
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if exclude: |
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m = lambda f: not em(f) |
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else: |
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m = lambda f: True |
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self.matchfn = m |
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self._fmap = set(self._files) |
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def __call__(self, fn): |
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return self.matchfn(fn) |
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def __iter__(self): |
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for f in self._files: |
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yield f |
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def bad(self, f, msg): |
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'''callback for each explicit file that can't be |
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found/accessed, with an error message |
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''' |
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pass |
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def dir(self, f): |
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pass |
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def missing(self, f): |
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pass |
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def exact(self, f): |
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return f in self._fmap |
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def rel(self, f): |
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return util.pathto(self._root, self._cwd, f) |
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def files(self): |
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return self._files |
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def anypats(self): |
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return self._anypats |
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|
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class exact(match): |
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def __init__(self, root, cwd, files): |
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match.__init__(self, root, cwd, files, exact = True) |
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|
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class always(match): |
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def __init__(self, root, cwd): |
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match.__init__(self, root, cwd, []) |
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|
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class narrowmatcher(match): |
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114 |
"""Adapt a matcher to work on a subdirectory only. |
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116 |
The paths are remapped to remove/insert the path as needed: |
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|
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118 |
>>> m1 = match('root', '', ['a.txt', 'sub/b.txt']) |
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119 |
>>> m2 = narrowmatcher('sub', m1) |
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|
120 |
>>> bool(m2('a.txt')) |
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121 |
False |
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122 |
>>> bool(m2('b.txt')) |
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123 |
True |
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124 |
>>> bool(m2.matchfn('a.txt')) |
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125 |
False |
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126 |
>>> bool(m2.matchfn('b.txt')) |
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127 |
True |
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128 |
>>> m2.files() |
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129 |
['b.txt'] |
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130 |
>>> m2.exact('b.txt') |
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131 |
True |
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132 |
>>> m2.rel('b.txt') |
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133 |
'b.txt' |
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|
134 |
>>> def bad(f, msg): |
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135 |
... print "%s: %s" % (f, msg) |
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136 |
>>> m1.bad = bad |
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137 |
>>> m2.bad('x.txt', 'No such file') |
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|
138 |
sub/x.txt: No such file |
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|
139 |
""" |
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140 |
|
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141 |
def __init__(self, path, matcher): |
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142 |
self._root = matcher._root |
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143 |
self._cwd = matcher._cwd |
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144 |
self._path = path |
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145 |
self._matcher = matcher |
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146 |
|
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147 |
self._files = [f[len(path) + 1:] for f in matcher._files |
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|
148 |
if f.startswith(path + "/")] |
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|
149 |
self._anypats = matcher._anypats |
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150 |
self.matchfn = lambda fn: matcher.matchfn(self._path + "/" + fn) |
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151 |
self._fmap = set(self._files) |
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152 |
|
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|
153 |
def bad(self, f, msg): |
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154 |
self._matcher.bad(self._path + "/" + f, msg) |
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155 |
|
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|
156 |
def patkind(pat): |
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|
157 |
return _patsplit(pat, None)[0] |
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|
158 |
|
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|
159 |
def _patsplit(pat, default): |
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|
160 |
"""Split a string into an optional pattern kind prefix and the |
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|
161 |
actual pattern.""" |
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|
162 |
if ':' in pat: |
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|
163 |
kind, val = pat.split(':', 1) |
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|
164 |
if kind in ('re', 'glob', 'path', 'relglob', 'relpath', 'relre'): |
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|
165 |
return kind, val |
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|
166 |
return default, pat |
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|
167 |
|
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|
168 |
def _globre(pat): |
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|
169 |
"convert a glob pattern into a regexp" |
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|
170 |
i, n = 0, len(pat) |
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|
171 |
res = '' |
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|
172 |
group = 0 |
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|
173 |
escape = re.escape |
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|
174 |
def peek(): |
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|
175 |
return i < n and pat[i] |
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|
176 |
while i < n: |
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|
177 |
c = pat[i] |
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|
178 |
i += 1 |
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|
179 |
if c not in '*?[{},\\': |
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|
180 |
res += escape(c) |
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|
181 |
elif c == '*': |
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|
182 |
if peek() == '*': |
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|
183 |
i += 1 |
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|
184 |
res += '.*' |
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|
185 |
else: |
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|
186 |
res += '[^/]*' |
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|
187 |
elif c == '?': |
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|
188 |
res += '.' |
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|
189 |
elif c == '[': |
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changeset
|
190 |
j = i |
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|
191 |
if j < n and pat[j] in '!]': |
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|
192 |
j += 1 |
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changeset
|
193 |
while j < n and pat[j] != ']': |
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|
194 |
j += 1 |
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changeset
|
195 |
if j >= n: |
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changeset
|
196 |
res += '\\[' |
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changeset
|
197 |
else: |
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changeset
|
198 |
stuff = pat[i:j].replace('\\','\\\\') |
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changeset
|
199 |
i = j + 1 |
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diff
changeset
|
200 |
if stuff[0] == '!': |
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changeset
|
201 |
stuff = '^' + stuff[1:] |
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changeset
|
202 |
elif stuff[0] == '^': |
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changeset
|
203 |
stuff = '\\' + stuff |
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changeset
|
204 |
res = '%s[%s]' % (res, stuff) |
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changeset
|
205 |
elif c == '{': |
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diff
changeset
|
206 |
group += 1 |
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diff
changeset
|
207 |
res += '(?:' |
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diff
changeset
|
208 |
elif c == '}' and group: |
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changeset
|
209 |
res += ')' |
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Nishanth Amuluru <nishanth@fossee.in>
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diff
changeset
|
210 |
group -= 1 |
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Nishanth Amuluru <nishanth@fossee.in>
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diff
changeset
|
211 |
elif c == ',' and group: |
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Added buildout stuff and made changes accordingly
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parents:
diff
changeset
|
212 |
res += '|' |
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Added buildout stuff and made changes accordingly
Nishanth Amuluru <nishanth@fossee.in>
parents:
diff
changeset
|
213 |
elif c == '\\': |
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Added buildout stuff and made changes accordingly
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parents:
diff
changeset
|
214 |
p = peek() |
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Nishanth Amuluru <nishanth@fossee.in>
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diff
changeset
|
215 |
if p: |
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diff
changeset
|
216 |
i += 1 |
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Added buildout stuff and made changes accordingly
Nishanth Amuluru <nishanth@fossee.in>
parents:
diff
changeset
|
217 |
res += escape(p) |
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Added buildout stuff and made changes accordingly
Nishanth Amuluru <nishanth@fossee.in>
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diff
changeset
|
218 |
else: |
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Nishanth Amuluru <nishanth@fossee.in>
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diff
changeset
|
219 |
res += escape(c) |
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Added buildout stuff and made changes accordingly
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diff
changeset
|
220 |
else: |
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Nishanth Amuluru <nishanth@fossee.in>
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diff
changeset
|
221 |
res += escape(c) |
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changeset
|
222 |
return res |
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changeset
|
223 |
|
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diff
changeset
|
224 |
def _regex(kind, name, tail): |
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changeset
|
225 |
'''convert a pattern into a regular expression''' |
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|
226 |
if not name: |
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|
227 |
return '' |
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diff
changeset
|
228 |
if kind == 're': |
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diff
changeset
|
229 |
return name |
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Added buildout stuff and made changes accordingly
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diff
changeset
|
230 |
elif kind == 'path': |
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Added buildout stuff and made changes accordingly
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parents:
diff
changeset
|
231 |
return '^' + re.escape(name) + '(?:/|$)' |
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Added buildout stuff and made changes accordingly
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diff
changeset
|
232 |
elif kind == 'relglob': |
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Added buildout stuff and made changes accordingly
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diff
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|
233 |
return '(?:|.*/)' + _globre(name) + tail |
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Added buildout stuff and made changes accordingly
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diff
changeset
|
234 |
elif kind == 'relpath': |
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Added buildout stuff and made changes accordingly
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parents:
diff
changeset
|
235 |
return re.escape(name) + '(?:/|$)' |
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Added buildout stuff and made changes accordingly
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parents:
diff
changeset
|
236 |
elif kind == 'relre': |
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diff
changeset
|
237 |
if name.startswith('^'): |
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diff
changeset
|
238 |
return name |
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diff
changeset
|
239 |
return '.*' + name |
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return _globre(name) + tail |
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241 |
|
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def _buildmatch(pats, tail): |
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243 |
"""build a matching function from a set of patterns""" |
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244 |
try: |
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pat = '(?:%s)' % '|'.join([_regex(k, p, tail) for (k, p) in pats]) |
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if len(pat) > 20000: |
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247 |
raise OverflowError() |
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return re.compile(pat).match |
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249 |
except OverflowError: |
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250 |
# We're using a Python with a tiny regex engine and we |
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251 |
# made it explode, so we'll divide the pattern list in two |
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252 |
# until it works |
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253 |
l = len(pats) |
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254 |
if l < 2: |
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255 |
raise |
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256 |
a, b = _buildmatch(pats[:l//2], tail), _buildmatch(pats[l//2:], tail) |
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257 |
return lambda s: a(s) or b(s) |
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258 |
except re.error: |
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259 |
for k, p in pats: |
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260 |
try: |
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261 |
re.compile('(?:%s)' % _regex(k, p, tail)) |
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262 |
except re.error: |
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263 |
raise util.Abort(_("invalid pattern (%s): %s") % (k, p)) |
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264 |
raise util.Abort(_("invalid pattern")) |
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265 |
|
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266 |
def _normalize(names, default, root, cwd, auditor): |
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267 |
pats = [] |
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268 |
for kind, name in [_patsplit(p, default) for p in names]: |
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269 |
if kind in ('glob', 'relpath'): |
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270 |
name = util.canonpath(root, cwd, name, auditor) |
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271 |
elif kind in ('relglob', 'path'): |
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name = util.normpath(name) |
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273 |
|
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274 |
pats.append((kind, name)) |
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275 |
return pats |
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276 |
|
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277 |
def _roots(patterns): |
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278 |
r = [] |
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279 |
for kind, name in patterns: |
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280 |
if kind == 'glob': # find the non-glob prefix |
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281 |
root = [] |
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282 |
for p in name.split('/'): |
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283 |
if '[' in p or '{' in p or '*' in p or '?' in p: |
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284 |
break |
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285 |
root.append(p) |
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286 |
r.append('/'.join(root) or '.') |
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287 |
elif kind in ('relpath', 'path'): |
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288 |
r.append(name or '.') |
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289 |
elif kind == 'relglob': |
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290 |
r.append('.') |
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291 |
return r |
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292 |
|
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293 |
def _anypats(patterns): |
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294 |
for kind, name in patterns: |
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295 |
if kind in ('glob', 're', 'relglob', 'relre'): |
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296 |
return True |