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Re: [SOLVED] `git fetch tag NAME' into mirror repo does not update HEAD, what to do?

From
Tomas Carnecky <tom@dbservice.com>
Date
Aug 12, 2010, 13:34 UTC
Message-ID
<4C63F860.2090600@dbservice.com>
In-Reply-To
<201008121522.55020.brian.foster@innova-card.com>
On 8/12/10 3:22 PM, Brian Foster wrote:
Show 8 quoted lines
> On Thursday 12 August 2010 14:32:41 Tomas Carnecky wrote:
>>                                                         When you use
>> 'git update-ref --no-deref HEAD v2' it will modify HEAD
> 
>  NO, it gets an error (following is from a modified version
>  of my previously-posted script):
> + git update-ref --no-deref HEAD v2          
> error: Trying to write non-commit object 2bc324e6a68cb3704448c9f63ddc3bc0260c0b48 to branch HEAD                                                                                

Oh the subtleties when working with plumbing: git update-ref --no-deref HEAD v2^{commit}

Show 14 quoted lines
>  Using ‘git update-ref --no-deref HEAD FETCH_HEAD’ does
>  not error, and, as you say (below), does seem to give
>  me a detached head.
> 
>> 'git update-ref --no-deref HEAD v2' it will modify HEAD directly and
>> have it point directly to the same commit as v2 (also called detached HEAD).
> 
>  I do_not_ want a detached head!  This has perhaps been
>  confused by my improperly saying “update HEAD” when I
>  meant “update the master branch”.  If you look back at
>  my originally-posted diagrams, it's a reasonable guess
>  I don't want a detached head.  Having HEAD continue to
>  be a symref to refs/heads/master (which, in this case,
>  is the same commit as v2) is correct.

Just make sure your tools and scripts don't break when you reset the branch like that (especially when the update is non-fast forward as fetch+reset won't warn you when this happens).

tom
Previous: Brian FosterNext: Brian Foster
Message 8 of 11 in “[Q] `git fetch tag NAME' into mirror repo does not update HEAD, what to do?”
  1. Brian FosterAug 12, 2010
  2. Tomas CarneckyAug 12, 2010
  3. Brian FosterAug 12, 2010
  4. Tomas CarneckyAug 12, 2010
  5. [SOLVED] `git fetch tag NAME' into mirror repo does not update HEAD, what to do?Brian Foster, Aug 12, 2010
  6. Tomas CarneckyAug 12, 2010
  7. Brian FosterAug 12, 2010
  8. Tomas CarneckyAug 12, 2010
  9. Brian FosterAug 13, 2010
  10. Brandon CaseyAug 12, 2010
  11. Brian FosterAug 13, 2010

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