65 lines
2.0 KiB
Python
65 lines
2.0 KiB
Python
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import os
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import sys
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try:
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from functools import wraps
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except ImportError:
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# only needed for Python 2.4
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def wraps(_):
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def _wraps(func):
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return func
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return _wraps
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__unittest = True
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def _relpath_nt(path, start=os.path.curdir):
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"""Return a relative version of a path"""
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if not path:
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raise ValueError("no path specified")
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start_list = os.path.abspath(start).split(os.path.sep)
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path_list = os.path.abspath(path).split(os.path.sep)
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if start_list[0].lower() != path_list[0].lower():
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unc_path, rest = os.path.splitunc(path)
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unc_start, rest = os.path.splitunc(start)
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if bool(unc_path) ^ bool(unc_start):
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raise ValueError("Cannot mix UNC and non-UNC paths (%s and %s)"
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% (path, start))
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else:
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raise ValueError("path is on drive %s, start on drive %s"
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% (path_list[0], start_list[0]))
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# Work out how much of the filepath is shared by start and path.
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for i in range(min(len(start_list), len(path_list))):
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if start_list[i].lower() != path_list[i].lower():
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break
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else:
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i += 1
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rel_list = [os.path.pardir] * (len(start_list)-i) + path_list[i:]
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if not rel_list:
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return os.path.curdir
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return os.path.join(*rel_list)
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# default to posixpath definition
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def _relpath_posix(path, start=os.path.curdir):
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"""Return a relative version of a path"""
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if not path:
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raise ValueError("no path specified")
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start_list = os.path.abspath(start).split(os.path.sep)
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path_list = os.path.abspath(path).split(os.path.sep)
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# Work out how much of the filepath is shared by start and path.
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i = len(os.path.commonprefix([start_list, path_list]))
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rel_list = [os.path.pardir] * (len(start_list)-i) + path_list[i:]
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if not rel_list:
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return os.path.curdir
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return os.path.join(*rel_list)
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if os.path is sys.modules.get('ntpath'):
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relpath = _relpath_nt
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else:
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relpath = _relpath_posix
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