author | Stuart W Marks <smarks@smarks.org> |
Thu, 17 Sep 2009 22:39:38 -0700 | |
changeset 9468 | b2310903c462 |
parent 9036 | 32e678f9045f |
child 10263 | 25e572394f5c |
permissions | -rw-r--r-- |
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Generally replace "file name" with "filename" in help and comments.
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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, incorporated herein by reference. |
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|
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import re |
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import util |
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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): |
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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), '(?:/|$)') |
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if exclude: |
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em = _buildmatch(_normalize(exclude, 'glob', root, cwd), '(?:/|$)') |
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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) |
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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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|
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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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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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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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def patkind(pat): |
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return _patsplit(pat, None)[0] |
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def _patsplit(pat, default): |
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"""Split a string into an optional pattern kind prefix and the |
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actual pattern.""" |
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if ':' in pat: |
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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(): return i < n and pat[i] |
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129 |
while i < n: |
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130 |
c = pat[i] |
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131 |
i = i+1 |
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132 |
if c not in '*?[{},\\': |
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133 |
res += escape(c) |
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|
134 |
elif c == '*': |
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|
135 |
if peek() == '*': |
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|
136 |
i += 1 |
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|
137 |
res += '.*' |
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|
138 |
else: |
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|
139 |
res += '[^/]*' |
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|
140 |
elif c == '?': |
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|
141 |
res += '.' |
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|
142 |
elif c == '[': |
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|
143 |
j = i |
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|
144 |
if j < n and pat[j] in '!]': |
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|
145 |
j += 1 |
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|
146 |
while j < n and pat[j] != ']': |
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|
147 |
j += 1 |
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|
148 |
if j >= n: |
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|
149 |
res += '\\[' |
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|
150 |
else: |
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|
151 |
stuff = pat[i:j].replace('\\','\\\\') |
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|
152 |
i = j + 1 |
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|
153 |
if stuff[0] == '!': |
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|
154 |
stuff = '^' + stuff[1:] |
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|
155 |
elif stuff[0] == '^': |
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|
156 |
stuff = '\\' + stuff |
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|
157 |
res = '%s[%s]' % (res, stuff) |
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|
158 |
elif c == '{': |
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|
159 |
group += 1 |
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|
160 |
res += '(?:' |
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|
161 |
elif c == '}' and group: |
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|
162 |
res += ')' |
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|
163 |
group -= 1 |
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|
164 |
elif c == ',' and group: |
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|
165 |
res += '|' |
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|
166 |
elif c == '\\': |
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|
167 |
p = peek() |
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changeset
|
168 |
if p: |
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|
169 |
i += 1 |
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|
170 |
res += escape(p) |
8570
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|
171 |
else: |
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|
172 |
res += escape(c) |
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|
173 |
else: |
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|
174 |
res += escape(c) |
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|
175 |
return res |
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|
176 |
|
8574
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|
177 |
def _regex(kind, name, tail): |
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|
178 |
'''convert a pattern into a regular expression''' |
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|
179 |
if not name: |
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|
180 |
return '' |
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|
181 |
if kind == 're': |
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|
182 |
return name |
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changeset
|
183 |
elif kind == 'path': |
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|
184 |
return '^' + re.escape(name) + '(?:/|$)' |
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|
185 |
elif kind == 'relglob': |
8582
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|
186 |
return '(?:|.*/)' + _globre(name) + tail |
8574
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|
187 |
elif kind == 'relpath': |
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|
188 |
return re.escape(name) + '(?:/|$)' |
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|
189 |
elif kind == 'relre': |
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|
190 |
if name.startswith('^'): |
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|
191 |
return name |
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changeset
|
192 |
return '.*' + name |
8582
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|
193 |
return _globre(name) + tail |
8574
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|
194 |
|
8580
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diff
changeset
|
195 |
def _buildmatch(pats, tail): |
8574
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|
196 |
"""build a matching function from a set of patterns""" |
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|
197 |
try: |
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|
198 |
pat = '(?:%s)' % '|'.join([_regex(k, p, tail) for (k, p) in pats]) |
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|
199 |
if len(pat) > 20000: |
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|
200 |
raise OverflowError() |
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|
201 |
return re.compile(pat).match |
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changeset
|
202 |
except OverflowError: |
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|
203 |
# We're using a Python with a tiny regex engine and we |
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|
204 |
# made it explode, so we'll divide the pattern list in two |
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|
205 |
# until it works |
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|
206 |
l = len(pats) |
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changeset
|
207 |
if l < 2: |
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|
208 |
raise |
8580
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changeset
|
209 |
a, b = _buildmatch(pats[:l//2], tail), _buildmatch(pats[l//2:], tail) |
8574
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|
210 |
return lambda s: a(s) or b(s) |
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changeset
|
211 |
except re.error: |
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|
212 |
for k, p in pats: |
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|
213 |
try: |
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changeset
|
214 |
re.compile('(?:%s)' % _regex(k, p, tail)) |
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|
215 |
except re.error: |
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|
216 |
raise util.Abort("invalid pattern (%s): %s" % (k, p)) |
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|
217 |
raise util.Abort("invalid pattern") |
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|
218 |
|
8578 | 219 |
def _normalize(names, default, root, cwd): |
8574
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|
220 |
pats = [] |
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|
221 |
for kind, name in [_patsplit(p, default) for p in names]: |
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|
222 |
if kind in ('glob', 'relpath'): |
8578 | 223 |
name = util.canonpath(root, cwd, name) |
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|
224 |
elif kind in ('relglob', 'path'): |
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|
225 |
name = util.normpath(name) |
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|
226 |
|
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|
227 |
pats.append((kind, name)) |
8576
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|
228 |
return pats |
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|
229 |
|
8576
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|
230 |
def _roots(patterns): |
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|
231 |
r = [] |
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|
232 |
for kind, name in patterns: |
8584
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|
233 |
if kind == 'glob': # find the non-glob prefix |
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|
234 |
root = [] |
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|
235 |
for p in name.split('/'): |
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|
236 |
if '[' in p or '{' in p or '*' in p or '?' in p: |
0f06e72abfdc
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|
237 |
break |
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|
238 |
root.append(p) |
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|
239 |
r.append('/'.join(root) or '.') |
8574
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|
240 |
elif kind in ('relpath', 'path'): |
8576
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|
241 |
r.append(name or '.') |
8574
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|
242 |
elif kind == 'relglob': |
8576
ec4ed21db4b2
match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents:
8575
diff
changeset
|
243 |
r.append('.') |
ec4ed21db4b2
match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents:
8575
diff
changeset
|
244 |
return r |
ec4ed21db4b2
match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents:
8575
diff
changeset
|
245 |
|
ec4ed21db4b2
match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents:
8575
diff
changeset
|
246 |
def _anypats(patterns): |
ec4ed21db4b2
match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents:
8575
diff
changeset
|
247 |
for kind, name in patterns: |
ec4ed21db4b2
match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents:
8575
diff
changeset
|
248 |
if kind in ('glob', 're', 'relglob', 'relre'): |
ec4ed21db4b2
match: split up _normalizepats
Matt Mackall <mpm@selenic.com>
parents:
8575
diff
changeset
|
249 |
return True |