Re: bug? in checkout with ambiguous refnames

Hi,

On Wed, Jan 12, 2011 at 12:46:00PM -0500, Jeff King wrote:

On Wed, Jan 12, 2011 at 10:11:30AM +0100, Uwe Kleine-König wrote:

quoted

quoted

quoted

So working copy and cache are at refs/tags/sgu/mxs-amba-uart, HEAD
points to refs/heads/sgu/mxs-amba-uart

Yeah, we generally resolve ambiguities in favor of the tag (and that
warning comes from deep within get_sha1_basic). So the real bug here is
that it still said "Switched to branch", which is totally wrong.

I wonder how I can resolve the ambiguity when calling checkout.  (Well
apart from changing either branch name or tag name)

git checkout refs/heads/sgu/mxs-amba-uart results in a detached HEAD.

You can't disambiguate to the branch without going to a detached HEAD in
the current code; it's just broken[1].

With the patch here:

  http://article.gmane.org/gmane.comp.version-control.git/164986

it will disambiguate to the branch by default, and if you want the tag,
you can do:

  git checkout tags/sgu/mxs-amba-uart

that's fine.

[1]: You can't do it with checkout, that is. You can still hack around
     it with:

        branch=refs/heads/sgu/mxs-amba-uart
        git read-tree -m -u $branch &&
        git symbolic-ref HEAD $branch

I did

	git checkout refs/heads/sgu/mxs-amba-uart
	git symbolic-ref HEAD refs/heads/sgu/mxs-amba-uart

:-)

Uwe

     which is a simplified version of what checkout is doing.

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Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |