Re: v2.9.3 and v2.10.0: `name-ref' HEAD gives wrong branch name

From: Jakub Narębski <jnareb@gmail.com>
Date: Sep 21, 2016, 13:43 UTC
Message-ID: <b1d35732-4b4c-e0c1-59da-44d3e3b28799@gmail.com>
In-Reply-To: <CAGyf7-FR11Ludt3vNZX7Ek4n_JLSON5+Y9By83GvNgpg94TWcg@mail.gmail.com>

W dniu 20.09.2016 o 20:54, Bryan Turner pisze:

Show 12 quoted lines

> On Tue, Sep 20, 2016 at 9:23 AM, Steffen Nurpmeso <steffen@sdaoden.eu> wrote:
>> Hello again,
>>
>> yah, sorry, i'm back again..
>> I try to find a way to find the name of the current branch in an
>> automated way, because i need to ensure that a commit happens on
>> it and no other branch.  Now the problem arises that the commit
>> ref at the time of that commit maybe shared in between several
>> different branches, but no more thereafter, of course:
>>
>>   ?0[steffen@wales ]$ git branch|grep '^*'
>>   * stable/v14.9

Not good, 'git branch' is a porcelain (user facing) command, so it output may change; e.g. '*' could be replaced with '•'. For example output for detached HEAD had changed!

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>>   ?0[steffen@wales ]$ git name-rev --name-only HEAD
>>   stable/v14.8
>>
>> Is there another way except looking into .git/HEAD or using sed(1)
>> on the output of `branch' to find the right name?
> 
> Have you tried "git symbolic-ref HEAD"?
> 
> $ git symbolic-ref HEAD
> refs/heads/master
> 
> If you don't want the fully-qualified ref, you can add --short:
> 
> $ git symbolic-ref --short HEAD
> master

This does not work for detached HEAD, but perhaps you don't need to worry about this.

  $ git rev-parse --symbolic-full-name HEAD
  refs/heads/master

But

  $ git checkout HEAD^0
  Note: checking out 'HEAD^0'.

  You are in 'detached HEAD' state. [...]
 
  $ git rev-parse --symbolic-full-name HEAD
  HEAD

  $ git symbolic-ref HEAD
  fatal: ref HEAD is not a symbolic ref

  $ git branch
  * (HEAD detached at 3e2ebf9)
    master

-- 
Jakub Narębski