Re: Alternates corruption issue

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On Tue, Jan 31, 2012 at 04:22:58PM -0600, Jonathan Nieder wrote:

> Forgetting the algorithms:
> 
>  (A) means "find what repository we are in the worktree for, or,
>  barring that, what bare repository we are in".
> 
>  (B) means "find which repository the user pointed to.  To be extra
>  nice, we allow a '.git' extension to be left out, so the URL used
>  doesn't have to include the redundant information that this is a
>  git repository, and we even allow pointing to the toplevel of a
>  worktree instead of a repository, too."

I can see that as a plausible interpretation. But I think your "means"
is kind of vague.  In other words, we are assigning a meaning that is
not actually documented anywhere, and which we are hoping matches user
expectations. So the correct behavior kind of depends on your mental
model. IOW, I find your mental model plausible, but it is not the one
that I had.

But like I said, I'm OK either way. I'll prepare this fix with the least
behavior change possible. Then doing your change on top should be a
trivial rearrangement of the lookup arrays (the "hard" part for your
proposed change is adding in the is_git_directory() calls[1], but I'll
do that as part of mine).

> I admit part of the reason I care is that just putting "" first would
> probably taken care of the more important part of
> <http://bugs.debian.org/399041>.

Would that fix it? If I understand it, the repo in question is bare with
a ".git" directory inside it. Your proposed change would make "git
ls-remote foo" work, but wouldn't "cd foo && git log" still be broken?
At the very least, it would show a completely different repo than
ls-remote.

-Peff

[1] Without the is_git_directory() check, the ordering you propose
    breaks things very badly. Because if I point to a non-bare directory
    "foo", we say "OK, foo exists" and never look at "foo/.git". So
    instead, we have to say "OK, foo exists, but hey, it looks nothing
    like a .git directory" and keep trying.
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