pathaddition.match

+ 1 #============================================================================ + 2 #Name : match.py + 3 #Part of : Helium + 4 + 5 #Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). + 6 #All rights reserved. + 7 #This component and the accompanying materials are made available + 8 #under the terms of the License "Eclipse Public License v1.0" + 9 #which accompanies this distribution, and is available + 10 #at the URL "http://www.eclipse.org/legal/epl-v10.html". + 11 # + 12 #Initial Contributors: + 13 #Nokia Corporation - initial contribution. + 14 # + 15 #Contributors: + 16 # + 17 #Description: + 18 #=============================================================================== + 19 + 20 """ This module provides support for Ant-style wildcards, + 21 which are not the same as regular expressions (which are documented in the re module). + 22 """ + 23 import os.path + 24 import pathaddition.relative + 25 import logging + 26 import fnmatch + 27 import re + 28 import sys + 29 + 30 _logger = logging.getLogger('path.match') + 31 #logging.basicConfig() + 32 + 33 # local regular expression cache. + 34 _cache = {} + 35 +

36 -def ant_match(name, pattern, casesensitive=True): +

37 """Check if name matches pattern (Ant-style wildcards). + 38 """ + 39 _logger.debug("ant_match: path='%s' pattern='%s'" % (name, pattern)) + 40 if pattern.endswith('/') or pattern.endswith('\\'): + 41 pattern = pattern + '**' + 42 _logger.debug("ant_match: pattern ending with / or \ pattern='%s'" % (pattern)) + 43 name = os.path.normpath(name) + 44 pattern = os.path.normpath(pattern) + 45 name = name.replace('/', os.sep) + 46 name = name.replace('\\', os.sep) + 47 pattern = pattern.replace('/', os.sep) + 48 pattern = pattern.replace('\\', os.sep) + 49 _logger.debug("ant_match:normpath: path='%s' pattern='%s'" % (name, pattern)) + 50 + 51 if not _cache.has_key(pattern): + 52 res = translate(pattern) + 53 _logger.debug("ant_match: regexp=%s" % (res)) + 54 if sys.platform == "win32" or not casesensitive: + 55 _cache[pattern] = re.compile(res, re.I) + 56 else: + 57 _cache[pattern] = re.compile(res) + 58 return _cache[pattern].match(name) is not None +

59 + 60 +

61 -def translate(pat): +

62 """Translate a Ant-style PATTERN to a regular expression. + 63 + 64 There is no way to quote meta-characters. + 65 """ + 66 + 67 i, n = 0, len(pat) + 68 res = '' + 69 while i < n: + 70 c = pat[i] + 71 i = i+1 + 72 if c == '*': + 73 # identifying a ** + 74 if i < len(pat) and pat[i] == '*': + 75 res = res + "(?:(?:^|%s)[^%s]+)*(?:^|%s|$)" % (os.sep.replace('\\','\\\\'), os.sep.replace('\\','\\\\'), os.sep.replace('\\','\\\\')) + 76 i = i+1 + 77 # skipping next \ or / + 78 if i < len(pat) and pat[i] == os.sep: + 79 i = i+1 + 80 else: + 81 res = res + '[^%s]*' % os.sep.replace('\\','\\\\') + 82 elif c == '?': + 83 res = res + '[^%s]*' % os.sep.replace('\\','\\\\') + 84 elif c == '[': + 85 j = i + 86 if j < n and pat[j] == '!': + 87 j = j+1 + 88 if j < n and pat[j] == ']': + 89 j = j+1 + 90 while j < n and pat[j] != ']': + 91 j = j+1 + 92 if j >= n: + 93 res = res + '\\[' + 94 else: + 95 stuff = pat[i:j].replace('\\','\\\\') + 96 i = j+1 + 97 if stuff[0] == '!': + 98 stuff = '^' + stuff[1:] + 99 elif stuff[0] == '^': +100 stuff = '\\' + stuff +101 res = '%s[%s]' % (res, stuff) +102 else: +103 +104 if c == os.sep and i+2 <= len(pat) and pat[i] == "*" and pat[i+1] == "*": +105 # res = res + "?" +106 pass +107 else: +108 res = res + re.escape(c) +109 return res + "$" +

110 +

Source Code for Module pathaddition.match