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Code Issues Releases Wiki Activity

Issue #5117: My previous commit for this issue broke posix buildbot.

This commit is contained in:
Hirokazu Yamamoto 2010-10-19 01:23:51 +00:00
parent 50f7d7e213
commit 8596ef7064
1 changed files with 23 additions and 12 deletions
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31
Lib/ntpath.py
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@ -483,27 +483,38 @@ realpath = abspath
supports_unicode_filenames = (hasattr(sys, "getwindowsversion") and supports_unicode_filenames = (hasattr(sys, "getwindowsversion") and
sys.getwindowsversion()[3] >= 2) sys.getwindowsversion()[3] >= 2)
def _abspath_split(path):
abs = abspath(normpath(path))
prefix, rest = splitunc(abs)
is_unc = bool(prefix)
if not is_unc:
prefix, rest = splitdrive(abs)
return is_unc, prefix, [x for x in rest.split(sep) if x]
def relpath(path, start=curdir): def relpath(path, start=curdir):
"""Return a relative version of a path""" """Return a relative version of a path"""
if not path: if not path:
raise ValueError("no path specified") raise ValueError("no path specified")
start_list = [x for x in abspath(start).split(sep) if x]
path_list = [x for x in abspath(path).split(sep) if x] start_is_unc, start_prefix, start_list = _abspath_split(start)
if start_list[0].lower() != path_list[0].lower(): path_is_unc, path_prefix, path_list = _abspath_split(path)
unc_path, rest = splitunc(path)
unc_start, rest = splitunc(start) if path_is_unc ^ start_is_unc:
if bool(unc_path) ^ bool(unc_start):
raise ValueError("Cannot mix UNC and non-UNC paths (%s and %s)" raise ValueError("Cannot mix UNC and non-UNC paths (%s and %s)"
% (path, start)) % (path, start))
if path_prefix.lower() != start_prefix.lower():
if path_is_unc:
raise ValueError("path is on UNC root %s, start on UNC root %s"
% (path_prefix, start_prefix))
else: else:
raise ValueError("path is on drive %s, start on drive %s" raise ValueError("path is on drive %s, start on drive %s"
% (path_list[0], start_list[0])) % (path_prefix, start_prefix))
# Work out how much of the filepath is shared by start and path. # Work out how much of the filepath is shared by start and path.
for i in range(min(len(start_list), len(path_list))): i = 0
if start_list[i].lower() != path_list[i].lower(): for e1, e2 in zip(start_list, path_list):
if e1.lower() != e2.lower():
break break
else:
i += 1 i += 1
rel_list = [pardir] * (len(start_list)-i) + path_list[i:] rel_list = [pardir] * (len(start_list)-i) + path_list[i:]