build: make groovy version configurable

Make the groovy version configurable by property or env variable.

Author: matrei

build.gradle

@@ -10,6 +10,11 @@ ext.set('grailsVersion', libs.versions.grails.get())
 ext.set('isSnapshot', projectVersion.endsWith('-SNAPSHOT'))
 ext.set('isReleaseVersion', !isSnapshot)
 
+def groovyVersion = findProperty('groovyVersion') ?: System.getenv('GROOVY_VERSION')
+if (groovyVersion) {
+    ext.set('groovy.version', groovyVersion)
+}
+
 if(isReleaseVersion) {
     nexusPublishing {
         String nexusUser = System.getenv('SONATYPE_USERNAME')
@@ -35,7 +40,7 @@ subprojects {
         mavenCentral()
         maven { url = 'https://repo.grails.org/grails/core' }
         // mavenLocal() // Keep, this will be uncommented and used by CI (groovy-joint-workflow)
-        if (libs.versions.groovy.get().endsWith('-SNAPSHOT')) {
+        if (groovyVersion?.endsWith('-SNAPSHOT')) {
             // Used for testing locally against the latest snapshot of Groovy
             // Usage: ./gradlew -PgroovyVersion=X.X.X-SNAPSHOT build
             maven {

settings.gradle

@@ -25,18 +25,6 @@ buildCache {
 
 rootProject.name = 'grails-async'
 
-dependencyResolutionManagement {
-    versionCatalogs {
-        libs {
-            def groovyVersion = System.getenv('GROOVY_VERSION')
-            if (groovyVersion) {
-                logger.warn "Using custom version $groovyVersion of Groovy due to GROOVY_VERSION being set."
-                version('groovy', groovyVersion)
-            }
-        }
-    }
-}
-
 include 'docs'
 include 'grails-async-core'
 include 'grails-async-gpars'