ce18ecc89e
Mingw python has a different os.path setup from native python, and has os.sep and os.altsep reversed. In that case, the normsep function was doing the wrong thing, leading to all sorts of problems. While fixing this, also ensure the corresponding unit test covers this peculiarity, even when running under the native win32 python.
137 lines
3.8 KiB
Python
137 lines
3.8 KiB
Python
# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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from __future__ import absolute_import
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import posixpath
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import os
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import re
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'''
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Like os.path, with a reduced set of functions, and with normalized path
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separators (always use forward slashes).
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Also contains a few additional utilities not found in os.path.
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'''
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def normsep(path):
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'''
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Normalize path separators, by using forward slashes instead of whatever
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os.sep is.
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'''
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if os.sep != '/':
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path = path.replace(os.sep, '/')
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if os.altsep and os.altsep != '/':
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path = path.replace(os.altsep, '/')
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return path
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def relpath(path, start):
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rel = normsep(os.path.relpath(path, start))
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return '' if rel == '.' else rel
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def realpath(path):
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return normsep(os.path.realpath(path))
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def abspath(path):
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return normsep(os.path.abspath(path))
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def join(*paths):
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return normsep(os.path.join(*paths))
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def normpath(path):
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return posixpath.normpath(normsep(path))
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def dirname(path):
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return posixpath.dirname(normsep(path))
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def commonprefix(paths):
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return posixpath.commonprefix([normsep(path) for path in paths])
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def basename(path):
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return os.path.basename(path)
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def splitext(path):
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return posixpath.splitext(normsep(path))
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def split(path):
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'''
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Return the normalized path as a list of its components.
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split('foo/bar/baz') returns ['foo', 'bar', 'baz']
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'''
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return normsep(path).split('/')
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def basedir(path, bases):
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'''
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Given a list of directories (bases), return which one contains the given
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path. If several matches are found, the deepest base directory is returned.
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basedir('foo/bar/baz', ['foo', 'baz', 'foo/bar']) returns 'foo/bar'
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('foo' and 'foo/bar' both match, but 'foo/bar' is the deepest match)
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'''
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path = normsep(path)
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bases = [normsep(b) for b in bases]
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if path in bases:
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return path
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for b in sorted(bases, reverse=True):
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if b == '' or path.startswith(b + '/'):
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return b
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re_cache = {}
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def match(path, pattern):
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'''
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Return whether the given path matches the given pattern.
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An asterisk can be used to match any string, including the null string, in
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one part of the path:
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'foo' matches '*', 'f*' or 'fo*o'
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However, an asterisk matching a subdirectory may not match the null string:
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'foo/bar' does *not* match 'foo/*/bar'
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If the pattern matches one of the ancestor directories of the path, the
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patch is considered matching:
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'foo/bar' matches 'foo'
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Two adjacent asterisks can be used to match files and zero or more
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directories and subdirectories.
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'foo/bar' matches 'foo/**/bar', or '**/bar'
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'''
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if not pattern:
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return True
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if pattern not in re_cache:
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p = re.escape(pattern)
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p = re.sub(r'(^|\\\/)\\\*\\\*\\\/', r'\1(?:.+/)?', p)
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p = re.sub(r'(^|\\\/)\\\*\\\*$', r'(?:\1.+)?', p)
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p = p.replace(r'\*', '[^/]*') + '(?:/.*)?$'
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re_cache[pattern] = re.compile(p)
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return re_cache[pattern].match(path) is not None
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def rebase(oldbase, base, relativepath):
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'''
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Return relativepath relative to base instead of oldbase.
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'''
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if base == oldbase:
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return relativepath
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if len(base) < len(oldbase):
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assert basedir(oldbase, [base]) == base
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relbase = relpath(oldbase, base)
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result = join(relbase, relativepath)
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else:
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assert basedir(base, [oldbase]) == oldbase
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relbase = relpath(base, oldbase)
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result = relpath(relativepath, relbase)
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result = normpath(result)
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if relativepath.endswith('/') and not result.endswith('/'):
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result += '/'
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return result
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