I found two distutils error on windows.

1. If the implementation of ensure_relative is correct, test should be
fixed like attached patch.

2. I got tar error. This happens because tar command I'm using cannot
recognize path with drive letter. For example, "tar -cf r:/foo ." fails
with error. I'm using http://gnuwin32.sourceforge.net/packages/gtar.htm

E:\python-dev\trunk\Lib\distutils\tests>py test_archive_util.py
..tar: Cannot open
c:\docume~1\whiter~1\locals~1\temp\tmprd9lcc\archive.tar: Fun
ction not implemented
tar: Error is not recoverable: exiting now
E.
======================================================================
ERROR: test_make_tarball (__main__.ArchiveUtilTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "test_archive_util.py", line 35, in test_make_tarball
    make_tarball(base_name, '.')
  File "e:\python-dev\trunk\lib\distutils\archive_util.py", line 47, in
make_tar
ball
    spawn(cmd, dry_run=dry_run)
  File "e:\python-dev\trunk\lib\distutils\spawn.py", line 37, in spawn
    _spawn_nt(cmd, search_path, dry_run=dry_run)
  File "e:\python-dev\trunk\lib\distutils\spawn.py", line 86, in _spawn_nt
    "command '%s' failed with exit status %d" % (cmd[0], rc)
DistutilsExecError: command 'tar' failed with exit status 2

----------------------------------------------------------------------
Ran 4 tests in 0.591s

FAILED (errors=1)
[32258 refs]

Here is workaround for second issue. If there is tar command for windows
which supports drive letter, I think I should use it instead of
workaround or fix, though.

I am currently working on the removal of 'tar' in favor of the usage of
tarinfo, so I'll get back to you in this issue when it's ready

(and also fix the test in 2.6 for this case)

ok done, thanks for the patch;

> 2. I got tar error. This happens because tar command I'm using cannot
> recognize path with drive letter. For example, "tar -cf r:/foo ." fails
> with error. I'm using http://gnuwin32.sourceforge.net/packages/gtar.htm

I don't think this is a bug in distutils, but rather in the tar command
that you are using.