Re: Cannot checkout a branch / worktree shows multiple branches for the same directory

[Mike Rappazzo <rappazzo@gmail.com>]

On Thu, Apr 14, 2016 at 3:51 PM, Krzysztof Voss <k.voss@usask.ca> wrote:
> Hi,
>
> I stumbled upon an interesting problem when checking out a branch.
> I had to switch to a testing branch to merge in some changes from yet
> another branch, but when I tried to check out the testing branch I got
> a message saying that I'm already on the target branch.
>
> I used worktree a few times, but the checkouts were always in their
> own directories.
> It crossed my mind that this behaviour may be related, so I took a
> look at the worktree list and noticed that according to that list
> there are three branches at the same time in one directory.
>
> It may be a conicidence and I have no confidence in saying that these
> issues are related.
> Can someone shed some light on this issue for me?
>
>
>     $ git --version
>     git version 2.7.0.235.g07c314d
>
>     $ git status -uno -sb
>     ## ticket-22444
>     M src/core/parsers/ParserBase.py
>     M src/core/parsers/test/ParserBase_test.py
>
>     $ git stash
>     Saved working directory and index state WIP on ticket-22444:
> 7c5edaa #22444 refactoring
>     HEAD is now at 7c5edaa #22444 refactoring
>
>     $ git co testing
>     fatal: 'testing' is already checked out at '/home/k/workspace/moyo'
>
>     $ pwd
>     /home/k/workspace/moyo
>
>     $ git branch | grep '*'
>     * ticket-22444
>
>     $ git worktree list
>     /home/k/workspace/moyo  7c5edaa [ticket-22444]
>     /var/home/k/moyo-lsf  349613d (detached HEAD)
>     /home/k/workspace/moyo  265b7f9 (detached HEAD)
>     /home/k/workspace/moyo  c852282 [testing]

This looks a lot like the `update_linked_gitdir()` bug that (I
thought) was fixed[1].  Is
it possible that you had this problem since before the bug was fixed
and are just
noticing it now?

If you look in '/home/k/workspace/moyo/.git/worktrees/`  I suspect
that there are 3 dirs
in there, two of which have a file 'gitdir' which have the contents
'.git'.  These _should_
instead point to the '.git' file in your other work trees.  It would
be nice to know the last
time that those bad worktrees were updated.

If you know where the other worktrees are located, then you should be able to
manually update this file in each of the worktree dirs.
Alternatively, you can manually
remove the bad linked worktrees (`rm -r .git/worktrees/bad_wt`).

[1] http://thread.gmane.org/gmane.comp.version-control.git/284284

>
>     $ uname -a
>     Linux k 3.13.0-83-generic #127-Ubuntu SMP Fri Mar 11 00:25:37 UTC
> 2016 x86_64 x86_64 x86_64 GNU/Linux
>
>     $ cat /etc/lsb-release
>     DISTRIB_ID=Ubuntu
>     DISTRIB_RELEASE=14.04
>     DISTRIB_CODENAME=trusty
>     DISTRIB_DESCRIPTION="Ubuntu 14.04.4 LTS"
>
>
> Thanks,
> Krzysztof
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