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# -*- coding: utf-8 -*-
"""
sphinx.util.matching
~~~~~~~~~~~~~~~~~~~~
Pattern-matching utility functions for Sphinx.
:copyright: Copyright 2007-2014 by the Sphinx team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import re
def _translate_pattern(pat):
"""Translate a shell-style glob pattern to a regular expression.
Adapted from the fnmatch module, but enhanced so that single stars don't
match slashes.
"""
i, n = 0, len(pat)
res = ''
while i < n:
c = pat[i]
i += 1
if c == '*':
if i < n and pat[i] == '*':
# double star matches slashes too
i += 1
res = res + '.*'
else:
# single star doesn't match slashes
res = res + '[^/]*'
elif c == '?':
# question mark doesn't match slashes too
res = res + '[^/]'
elif c == '[':
j = i
if j < n and pat[j] == '!':
j += 1
if j < n and pat[j] == ']':
j += 1
while j < n and pat[j] != ']':
j += 1
if j >= n:
res = res + '\\['
else:
stuff = pat[i:j].replace('\\', '\\\\')
i = j + 1
if stuff[0] == '!':
# negative pattern mustn't match slashes too
stuff = '^/' + stuff[1:]
elif stuff[0] == '^':
stuff = '\\' + stuff
res = '%s[%s]' % (res, stuff)
else:
res += re.escape(c)
return res + '$'
def compile_matchers(patterns):
return [re.compile(_translate_pattern(pat)).match for pat in patterns]
_pat_cache = {}
def patmatch(name, pat):
"""Return if name matches pat. Adapted from fnmatch module."""
if pat not in _pat_cache:
_pat_cache[pat] = re.compile(_translate_pattern(pat))
return _pat_cache[pat].match(name)
def patfilter(names, pat):
"""Return the subset of the list NAMES that match PAT.
Adapted from fnmatch module.
"""
if pat not in _pat_cache:
_pat_cache[pat] = re.compile(_translate_pattern(pat))
match = _pat_cache[pat].match
return filter(match, names)
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