A plain ./gradlew build fails outright on a machine whose default java
is newer than 23, which is now an ordinary thing for a distro to ship.
Gradle 8.12 cannot run there, and what it says about it is that it
could not create task ':test' because type T is not present - nothing
about Java, and nothing to act on.
build.sh picks a JDK between 17 and 23 and builds with that. JAVA_HOME
wins if it already points at a usable one, otherwise the openjdk paths
are tried in turn; if there is nothing to pick it says so and names the
range, rather than leaving the Gradle error to be decoded. Arguments
pass through, so it is a wrapper around the wrapper and not a second
way to describe the build.
It reports the jar by reading mod_id and mod_version out of
gradle.properties instead of listing build/libs, which keeps old
versions sitting in that directory from being mistaken for the build
that just ran.
The toolchain is untouched by any of this - the mod still compiles
against Java 21, whatever Gradle itself is running on.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Amir Alexander Abdelbaki