Re: Commit to more than one branch at once?

From: Sean <seanlkml@sympatico.ca>
Date: Oct 6, 2006, 18:38 UTC
Message-ID: <BAYC1-PASMTP020F3D66B3E46CDBE82D40AE130@CEZ.ICE>
In-Reply-To: <45269E02.50407@s5r6.in-berlin.de>

On Fri, 06 Oct 2006 20:18:42 +0200 Stefan Richter <stefanr@s5r6.in-berlin.de> wrote:

Show 6 quoted lines

> if I git-cherry-pick a commit from branch A into branch B, this is shown
> as a difference in "git-log B..A".
> 
> Is it possible to commit a change to two or more branches but preserve
> the identity of the change? IOW, is there an alternative to
> git-cherry-pick that does not have above mentioned side effect?

Short answer:

No.

Slightly longer answer:

Only merging the branches will make the commit show up in branch B with the same SHA1 number (or identity) that it had in branch A. This is a fundamental part of Git. The sha1 of each commit is based in part on the sha1 of its parent. Thus it's impossible[1] to copy a commit to another branch (ie. reparent it) without changing its identity.

Sean

[1]  Okay, more or less impossible.. don't ask me do the math.