Re: Git bug

From: Gabriel Furstenheim Milerud <furstenheim@gmail.com>
Date: Apr 17, 2023, 09:46 UTC
Message-ID: <CAJN3DWoZcKP-Ft=fPvKeCgtGgfEGMrbSmfMaATjH_cuKRPbnpA@mail.gmail.com>
In-Reply-To: <CAJN3DWpvh8uHnRFnaPgg8U6dW=3xP9YULBe-xfeTAg2SV7K+oQ@mail.gmail.com>

In case someone stumbles onto this. The right way to do it is:

git rev-parse --symbolic-full-name --abbrev-ref=loose @{-1}

On Sat, 15 Apr 2023 at 11:00, Gabriel Furstenheim Milerud <furstenheim@gmail.com> wrote:

Show 81 quoted lines

>
> Sorry, my bad. I didn't realize that it worked based on commits. I got confused by git checkout -, which doesn't.
>
> Cheers
>
> On Fri, 14 Apr 2023, 18:07 René Scharfe, <l.s.r@web.de> wrote:
>>
>> Am 14.04.23 um 11:41 schrieb Gabriel Furstenheim Milerud:
>> > Thank you for filling out a Git bug report!
>> > Please answer the following questions to help us understand your issue.
>> >
>> > What did you do before the bug happened? (Steps to reproduce your issue)
>> >> repository in branch A
>> > git name-rev $(git rev-parse HEAD) --name-only
>> >> returns A
>> > git checkout B
>> > git name-rev $(git rev-parse HEAD) --name-only
>> >
>> >
>> >
>> > What did you expect to happen? (Expected behavior)
>> > It should return B
>> >
>> > What happened instead? (Actual behavior)
>> > It returns A
>>
>> Do you have a short recipe for creating the branches to reproduce this
>> behavior?  Here's my (failed) attempt:
>>
>>    # create repository
>>    git init -q /tmp/repo
>>    cd /tmp/repo
>>
>>    # create branch a
>>    echo a >a
>>    git add a
>>    git commit -q -m a
>>    git branch a
>>
>>    # create branch b
>>    echo b >b
>>    git add b
>>    git commit -q -m b
>>    git branch b
>>
>> With that done Git v2.34.1 gives me the output you expect:
>>
>>    $ git switch a
>>    Switched to branch 'a'
>>    $ git name-rev $(git rev-parse HEAD) --name-only
>>    a
>>
>>    $ git switch b
>>    Switched to branch 'b'
>>    $ git name-rev $(git rev-parse HEAD) --name-only
>>    b
>>
>> > What's different between what you expected and what actually happened?
>> > git rev-parse does not seem to update. Same is happenning with git
>> > rev-parse @{-1}
>>
>>    $ git name-rev $(git rev-parse @{-1}) --name-only
>>    a
>>
>> This is expected because @{-1} means the branch/commit checked out
>> before the current one.
>>
>> What does "git rev-parse HEAD" return for you in each case?  Do your
>> branches perhaps have the same HEAD commit?
>>
>> > Anything else you want to add:
>> > git version 2.34.1
>> >
>> > I recently migrated to ubuntu 22. In ubuntu 18 with previous git
>> > version is was working as expected.
>>
>> I guess you use LTS releases, i.e. jammy (22.04) and bionic (18.04)?
>> bionic shipped with Git 2.17.1 according to https://packages.ubuntu.com/
>>
>> René
>>