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RELEASING.md

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Releasing

Prerequisites

JDK 8 and JDK 11

Releasing Akka requires running on JDK 11, but also having JDK 8 installed. The reason for this is that we want the Akka artifacts to be usable with JRE 8, but also want to compile some classes with JDK11-specific types.

In the future we might be able to update the build to work without having JDK 8 installed, by using the -release option.

One Time GPG and sbt-pgp setup

If you have not set up GPG or used sbt-pgp on the release machine

  • Check the sbt-pgp usage for any setup steps you may still need, for example:
sbt> set pgpReadOnly := false
sbt> pgp-cmd gen-key
  • Check that signing works with sbt> publishLocalSigned

Mac

When releasing from MacOS you may want to use YubiKey or have MacGPG installed.

Windows

When releasing from Windows, you need MinGW and a gpg distribution such as Gpg4Win

Git

Make sure you have set core.autocrlf to false in your ~/.gitconfig, otherwise git might convert line endings in some cases.

Whitesource

Make sure you have the Lightbend Whitesource credentials configured in your ~/.sbt/1.0/private-credentials.sbt.

Install Graphviz

Graphvis is needed for the scaladoc generation build task, which is part of the release.

Release script instructions

Make sure you have completed the setup in project/scripts/release.

Snapshot releases

Nightly snapshot releases are created from master and published to https://repo.akka.io/snapshots by https://jenkins.akka.io:8498/job/akka-publish-nightly/

To create snapshot versions manually, use sbt clean publish. The release artifacts are created in akka-*/target/repository and can be copied over to a maven server. If you have access, the Jenkins job at https://jenkins.akka.io:8498/job/akka-publish-wip/ can be used to publish a snapshot to https://repo.akka.io/snapshots from any branch.

Release steps

  • Do a project/scripts/release <version> dry run
  • If all goes well, project/scripts/release --real-run <version>
  • Log into sonatype, 'close' the staging repo.
  • Test the artifacts by adding resolvers += "Staging Repo" at "https://oss.sonatype.org/content/repositories/comtypesafe-xxxx" to a test project
  • If all is well, 'release' the staging repo.

Announcing

  • Prepare milestone on github:

  • go to the Milestones tab

  • move all open issues so that this milestone contains completed work only

  • close that milestone

  • create a new milestone for next patch version

  • In case of a new minor release:

  • update the branch descriptions at CONTRIBUTING.md#branches-summary

  • write blog post for akka.io and lightbend.com

  • Create an announcement as a PR against akka/akka.github.com .

    • credits can be generated with scripts/authors.scala v2.3.5 v2.3.6
    • also update the latest variable in _config.yml.

Now wait until all artifacts have been properly propagated. Then:

  • Update MiMa.latestPatchOf and PR that change (project/MiMa.scala)

  • Change the symbolic links from 'current': ssh akkarepo@gustav.akka.io ./update-akka-current-version.sh <x.y.z>

  • Publish the release announcement

  • Tweet about it

  • Post about it on Discuss

  • Post about it on Gitter

Update references

Update the versions used in: