[cfe-dev] [Openmp-dev] [llvm-dev] Updates on SVN to GitHub migration

Tom Stellard via cfe-dev cfe-dev at lists.llvm.org
Mon Oct 22 10:45:23 PDT 2018

On 10/22/2018 08:31 AM, David Greene wrote:
> I had a short side-conversation at one of the roundtables about existing
> users of the subproject repositories.  It would be helpful to have
> instructions about the best way to move local branches in those
> repositories to the monorepo and some scripts to help with the
> transition.  I know someone posted an example project a while ago with
> some scripts but my sense is that those scripts were particular to that
> project and maybe not generally applicable.
> Once the monorepo goes live (tomorrow?), what happens to the existing
> subproject mirrors?  Do they get wiped away and replaced with history
> from the monorepo?  Or are entirely new mirrors created?  Or do they
> just continue to mirror SVN until SVN becomes read-only?

After Tuesday, the existing sub-projects mirrors will continue to mirror SVN
as they do today.  It's undecided what will happen once SVN becomes read-only.


> The first option would essentially be a rewrite of history for the
> subproject repositories.  We'll need to know if/when that is going to
> happen.
>                           -David
> Jonas Hahnfeld via Openmp-dev <openmp-dev at lists.llvm.org> writes:
>> (+openmp-dev, they should know about this!)
>> Recapping the "Concerns"
>> (https://llvm.org/docs/Proposals/GitHubMove.html#id12) there is a
>> proposal of "single-subproject Git mirrors" for people who are only
>> contributing to standalone subprojects. I think this will be easy in
>> the transition period, we can just continue to move the current
>> official git mirrors. Will this "service" be continued after GitHub
>> becomes the 'one source of truth'? I'd strongly vote for yes, but I'm
>> not sure how that's going to work on a technical level.
>> Thanks,
>> Jonas
>> On 2018-10-20 03:14, Tom Stellard via llvm-dev wrote:
>>> On 10/19/2018 05:47 PM, Tom Stellard via lldb-dev wrote:
>>>> TLDR: Official monorepo repository will be published on
>>>> Tuesday, Oct 23, 2018.  After this date, you should modify
>>>> your workflows to use the monorepo ASAP.  Current workflows
>>>> will be supported for at most 1 more year.
>>>> Hi,
>>>> We had 2 round-tables this week at the Developer Meeting to
>>>> discuss the SVN to GitHub migration, and I wanted to update
>>>> the rest of the community on what we discussed.
>>>> The most important outcome from that meeting is that we
>>>> now have a timeline for completing the transition which looks
>>>> like this:
>>> Step 1:
>>>> Tues Oct 23, 2018:
>>>> The latest monorepo prototype[1] will be moved over to the LLVM
>>>> organization github project[2] and will begin mirroring the current
>>>> SVN repository.  Commits will still be made to the SVN repository
>>>> just as they are today.
>>>> All community members should begin migrating their workflows that
>>>> rely on SVN or the current git mirrors to use the new monorepo.
>>>> For CI jobs or internal mirrors pulling from SVN or
>>>> http://llvm.org/git/*.git you should modify them to pull from
>>>> the new monorepo and also to deal with the new repository
>>>> layout.
>>>> For Developers, you should begin using the new monorepo
>>>> for your development and using the provided scripts[3]
>>>> to commit your code.  These scripts will allow to commit
>>>> to SVN from the monorepo without using git-svn
>>> Sorry hit send before I was done.  Here is the rest of the mail:
>>> Step 2:
>>> Around the time of next year's developer meeting (1 year at the most),
>>> we will turn off commit access to the SVN server and enable commit
>>> access to the monorepo.  At this point the monorepo will become the
>>> 'one source of truth' for the project.  Community members *must* have
>>> updated their workflows by this date and are encouraged to begin
>>> updating workflows ASAP.
>>> A lot of people asked at the developer meeting about the future
>>> of bugzilla and phabricator and whether or not we will use
>>> github issues and pull requests.  These are important questions,
>>> but are unrelated to the migration of the code.
>>> We also came up with a TODO list for things we want to accomplish
>>> as a community in the next year and beyond related to github.  I
>>> am working on putting these into bugzilla so we can track progress
>>> better and I will send a follow-up email about this.
>>> -Tom
>>>> [1] https://github.com/llvm-git-prototype/llvm>> [2] https://github.com/llvm/>> [3]
>>>> https://llvm.org/docs/GettingStarted.html#for-developers-to-work-with-a-git-monorepo>>
>>>> _______________________________________________
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>>>> lldb-dev at lists.llvm.org
>>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev>>
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