Re: GPG signing for git commit?

On Fri, Apr 17, 2009 at 06:36:40PM +0000, Sitaram Chamarty wrote:

On 2009-04-17, Jeff King [off-list ref] wrote:

quoted

quoted

If you set GIT_COMMITTER_*, won't it change the SHA of the
commit itself?  I always thought so...

No. Pushing will never create a new commit, so there are no new SHA-1s
calculated. But the reflog entry will contain GIT_COMMITTER_*, and is a
simple text file.

cool -- I didn't know this.  Thanks!

One last question: where do you set it, in the pre-commit
hook on the server?

No, for two reasons:

  1. The pre-commit hook is run when making a local commit. For pushing,
     you would want the pre-receive hook.

  2. Hooks are executed as child processes of receive-pack, so they
     can't impact the environment it sees.

I think you would need to intercept the call to receive-pack (e.g., by
replacing it with a wrapper script), set the variables based on ssh keys
used (or whatever criteria you want), and then exec receive-pack.

-Peff