Support for Java 17

[onukristo]

With

buildscript {
	dependencies {
		classpath "org.grails:grails-gradle-plugin:5.1.4"
	}
}

sourceCompatibility = 17
targetCompatibility = 17

on JDK 17, we get an error on ./gradlew assemble.

* What went wrong:
Execution failed for task ':my-service:findMainClass'.
> Unsupported class file major version 61

With

buildscript {
	dependencies {
		classpath "org.grails:grails-gradle-plugin:5.1.4"
		// To support JDK 17. Try to remove each time you upgrade grails-gradle-plugin.
		classpath "org.codehaus.groovy:groovy:3.0.10"
	}
}

it works.

Please remove the need to manually add classpath "org.codehaus.groovy:groovy:3.0.10" line.

---

./gradlew --version

------------------------------------------------------------
Gradle 7.4.2
------------------------------------------------------------

Build time:   2022-03-31 15:25:29 UTC
Revision:     540473b8118064efcc264694cbcaa4b677f61041

Kotlin:       1.5.31
Groovy:       3.0.9
Ant:          Apache Ant(TM) version 1.10.11 compiled on July 10 2021
JVM:          17.0.3 (Azul Systems, Inc. 17.0.3+7-LTS)
OS:           Linux 5.11.0-37-generic amd64

[arixmkii]

You can try gradle 7.5-rc1, which includes Groovy 3.0.10

% gradle -v

------------------------------------------------------------
Gradle 7.5-rc-1
------------------------------------------------------------

Build time:   2022-05-12 19:09:23 UTC
Revision:     8d531f6b22fb3a97fb623f949c5e7bae8a2e1fe2

Kotlin:       1.6.21
Groovy:       3.0.10
Ant:          Apache Ant(TM) version 1.10.11 compiled on July 10 2021
JVM:          18.0.1 (Eclipse Adoptium 18.0.1+10)
OS:           Mac OS X 12.4 aarch64