Re: [Qemu-devel] [RFC PATCH 1/1] OpenBIOS: Switch over to official OpenBIOS git repo

[Jeff Cody <jcody@redhat.com>]

On Mon, Jun 27, 2016 at 07:48:23AM +0100, Mark Cave-Ayland wrote:
> On 21/06/16 14:48, Mark Cave-Ayland wrote:
> 
> > On 21/06/16 11:28, Stefan Hajnoczi wrote:
> > 
> >> On Tue, Jun 21, 2016 at 01:40:42AM -0400, Jeff Cody wrote:
> >>> This update should preserve git history, and allow seamless switching
> >>> over to the official openbios git repo, rather than pulling from the
> >>> svn mirror.  All prior history from the svn repository should still be
> >>> preserved (i.e., commit hashes are the same for historical commits).
> >>>
> >>> In the roms/openbios submodule, the branch "origin/official" is the
> >>> latest mirror of the official git repository (fetched daily).
> >>>
> >>> Signed-off-by: Jeff Cody <jcody@redhat.com>
> >>> ---
> >>>  roms/openbios | 2 +-
> >>>  1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> Assuming the git.qemu-project.org openbios.git remote and .git/config
> >> mirror setting has been updated to use the new upstream git repo:
> >>
> >> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
> > 
> > Is it possible to switch this around, so that there is a legacy branch
> > which points to the current HEAD and master points to the new, upstream
> > git HEAD? Then it means if someone clones either the
> > git.qemu-project.org repository or the official repository then the
> > default master branch will point to the same HEAD.
> 
> Urgent ping? It has been another week, we're coming up to soft freeze
> and the PPC guys are urgently after an OpenBIOS fix.
> 
> As per the above I'd really like the branches switched around so that
> both the git.qemu-project.org master and github.com master are exactly
> the same HEAD although I believe it may be technically possible to do
> this part separately once the HEAD switch is in? If so, please can we
> apply this and then I can line up and attempt to push the outstanding
> patches to the new github master later this evening.
>

If we want something other than this patch, so that the openbios git repo
hosted on qemu.org has 'master' as the new github tracking, we might be able
to do that with a git-merge.  Here are the three methods I am thinking of:


A) For 'master' referencing new github hashes:
    git fetch github
    git merge --no-edit github/master
    git push /pub/git/openbios.git master:master


B) Old, prior behavior for SVN:
    git svn fetch svn
    git merge git-svn
    git push /pub/git/openbios.git master:master


C) Current behavior, as of the submitted patch above, this is what is being run:
    git svn fetch svn
    git merge git-svn
    git fetch github
    git push /pub/git/openbios.git master:master
    git push /pub/git/openbios.git official:official
(This seemed safest to run, as old behavior remains unchanged)

If we do A), we'll have merge commits with just the auto-generated merge
message, and I'm not sure this is what you want.  Thoughts?

Jeff