Add Java version - see guardian/gha-scala-library-release-workflow#36 #86
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See guardian/gha-scala-library-release-workflow#36 -
gha-scala-library-release-workflowhas moved to requiring projects to specify what version of Java they want to use to build, and this is expressed through anasdf-formatted.tool-versionsfile.This allows individual projects to experiment with later (or even earlier) versions of Java if they wish, without requiring all other projects using
gha-scala-library-release-workflowto upgrade their version of Java at the same time."But what if we need to support older versions of Java?"
Note that, although this PR specifies Java 21 (the latest LTS release of Java, which apparently has several performance benefits) for the library build, the artifacts released by the project do not need to require Java 21 - so long as the
scalacOptionsdefined in the project'sbuild.sbtincludes a-releaseflag, we can specify that we want the artifacts to support some older version of Java (eg-release:11for Java 11).