New candidate JEP: 357: Migrate from Mercurial to Git

Emmanuel Bourg ebourg at
Fri Jul 26 10:22:01 UTC 2019

Le 26/07/2019 à 11:31, Maurizio Cimadamore a écrit :

> Joe, does that mean (I hope) that we won't witness _two_ separate
> transitions (e.g. hg to self-hosted git, then self-hosted git to hosted
> git) ? Or is that still on the card somehow?
> Every time we change repository (as has happened twice already with the
> consolidation effort first, and the creation of the jdk/jdk repo later),
> there is a lot of cost for all the infrastructure that surrounds the
> JDK. Being the maintainer of several automated build and test and merge
> systems for the various Amber, Valhalla and Panama projects make me feel
> this pain acutely :-) (and I know I'm not alone in this)

Assuming the OpenJDK Git repository is first self hosted, a later move
to GitHub could be done without disrupting the infrastructure. Both
repositories could be kept in sync. That's how the Apache Software
Foundation operates with GitHub: the repositories are self hosted *and*
mirrored to GitHub, and commits are accepted on both ends.

Emmanuel Bourg

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