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