Re: [PATCH] Support working directory located at root

[Nguyen Thai Ngoc Duy <pclouds@gmail.com>]

2010/2/9 Junio C Hamano <gitster@pobox.com>:
> Nguyễn Thái Ngọc Duy <pclouds@gmail.com> writes:
>
>> Git should work regardless where the working directory is located,
>> even at root. This patch fixes two places where it assumes working
>> directory always have parent directory.
>>
>> In setup_git_directory_gently(), when Git goes up to root and finds
>> .git there, it happily sets worktree to "".
>
> If you mean "instead set it to "/" and things will work much better."
> I agree with the reasoning (not suggesting to reword---just trying to
> make sure I understood what you meant).

Yes.

>
>> In prefix_path(), loosen the outside repo check a little bit. Usually
>> when a path XXX is inside worktree /foo, it must be either "/foo", or
>> "/foo/...". When worktree is simply "/", we can safely ignore the
>> check: we have a slash at the beginning already.
>
> The logic for the "are we inside?" check above sounds correct.  When
> work_tree is at root, have "/" in it, and len inside the "if orig is
> absolute" block is 1, so memmove() strips out the leading '/' and makes
> the result relative to the root level.  Am I reading the code right?

You are. But I suspect my change in this code is not enough and caused
the problem (on msys?) for Hannes. If the worktree somehow is '//' and
sanitized is '/etc/resolv.conf', then we could end up eating two
chars, leading to "'tc/resolv.conf' not match" error.

Hannes, can you put a "printf("%s\n", work_tree);" in prefix_path() to
see if it's the case?
-- 
Duy