Re: Finding the name of the parent branch?

From: Pascal Obry <pascal@obry.net>
Date: Jan 30, 2009, 12:56 UTC
Message-ID: <a2633edd0901300456y48e8d78fn199675f2ae105c8@mail.gmail.com>
In-Reply-To: <adf1fd3d0901300318s5a0e4c94gab5f31342643ea52@mail.gmail.com>

Santi,

Thanks for you reply.

> I think your definition is not well defined. A, B and C are just
> branches of you project, technically they are equivalent. Maybe you

Right. Yet I want to know from which branch a branch as been started.

You need this to get the proper merge-base for example:

   $ git merge-base C A
      1

   $ git merge-base B C
      2

   $ git merge-base B A
      1

I always know on which topic branch I'm but, as shown above, depending on the parent branch passed to merge-base you do not get the same branch-point. This is fine.

So, when I'm in a topic branch I want to find the name of the parent branch. The one given when creating the branch:

   $ git branch B C

A "stupid" solution whould be to iterate over all branches. Looking for the merge-base and at the end output the branch having the youngest merge-base. I'm looking for something more efficient...

Show 14 quoted lines

> are thinking that the common commits of, say A and B, really belongs
> to A, but this is not the case they belong to both branches. In git a
> branch is really just a pointer to a commit and by extension the
> history, it is not a series of commits.
>
> Just a counterexample, just rearranging you graph:
>
>                        o---B
>                        /
>                   o---2---o---o---o---C
>                  /
>          ---o---1---o---o---o---A
>
> From you description: For B I would get C and for C I would get A.

Don't see this as a counter-example as it is exactly my example.

Did I missed something?

Pascal.

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