jdk/jdk repository transitions to Git, GitHub and Skara: September 5

[Erik Helin]

Hi all,

We are now getting closer to the jdk/jdk repository [0] transitioning to 
Git, GitHub and Skara. JEP 357 [0] and JEP 369 [1] were targeted to JDK 
16 at the end of May 2020 [2]. It was then also communicated that the 
jdk/jdk repository would transition "early September 2020" [3].

The exact target date for the transition of the jdk/jdk repository is 
now set to Saturday September 5, 2020. We aim to complete the transition 
during the weekend of September 5 - 6, 2020. Starting from September 4 
the Mercurial repository for jdk/jdk [0] will become read-only and the 
Git repository for jdk/jdk [5] will become read-write on Monday September 7.

If you are an OpenJDK Author, Committer or Reviewer, then please make 
sure you that you are ready for the transition by following the "Getting 
Started" guide on the Skara wiki [7]. In particular, make sure that you 
associate your GitHub username and OpenJDK username, see the "Getting 
Started" guide for details. Feel free to try out the new tools and make 
sure that everything works in the OpenJDK playground repository [8].

For those of you doing backports to jdk-updates repositories there is a 
Skara CLI tool, git hg-export, that will export commits from an OpenJDK 
Git repository in a format expected by hg and the OpenJDK Mercurial 
repositories [9]. A "clean" backport of a Git commit looks like the 
following:

$ git clone https://git.openjdk.java.net/jdk
$ git -C jdk hg-export <REV> | hg -R /path/to/hg/repo import

As part of transitioning the jdk/jdk repository we will also transition 
the jdk/client repository [6]. There is work ongoing that might result 
in jdk/client being archived instead of transitioned, but that work is 
not guaranteed to be done by September 5. We will send out more details 
on this as we get closer.

The jdk/submit [10] repository will not be transitioned, the equivalent 
functionality is provided by the /test pull request command [11].

There are continuously updated read-only mirrors of the jdk/jdk [5], 
jdk/client [12] and jdk/sandbox [13] repositories available if you want 
to create personal forks ahead of the transition. Note that the 
jdk/jdk15 [14] repository will stay on Mercurial as well as the 
jdk-updates/jdk15u [15] repository (at least for the time being).

If you have any questions just send an email to skara-dev at openjdk.java.net!

Thanks,
Erik and Robin

[0]: https://hg.openjdk.java.net/jdk/jdk
[1]: https://openjdk.java.net/jeps/357
[2]: https://openjdk.java.net/jeps/369
[3]: https://mail.openjdk.java.net/pipermail/jdk-dev/2020-May/004335.html
[4]: https://mail.openjdk.java.net/pipermail/jdk-dev/2020-May/004322.html
[5]: https://github.com/openjdk/jdk
[6]: https://hg.openjdk.java.net/jdk/client
[7]: https://wiki.openjdk.java.net/display/SKARA/Skara#Skara-GettingStarted
[8]: https://github.com/openjdk/playground
[9]: https://wiki.openjdk.java.net/display/SKARA/git-hg-export
[10]: https://hg.openjdk.java.net/jdk/submit
[11]: 
https://wiki.openjdk.java.net/display/SKARA/Pull+Request+Commands#PullRequestCommands-/test
[12]: https://github.com/jdk/client
[13]: https://github.com/jdk/jdk-sandbox
[14]: https://hg.openjdk.java.net/jdk/jdk15
[15]: https://hg.openjdk.java.net/jdk-updates/jdk15u