Running Groovy scripts from Gradle using a different version of Groovy

You can create directory src/main/groovy, put your script called myscript.groovy in there:

println "hello world from groovy version ${GroovySystem.version}"

Then, have a build.gradle file in your project root directory:

apply plugin: 'groovy'

repositories {
    mavenCentral()
}

dependencies {
    compile 'org.codehaus.groovy:groovy-all:2.0.5'
}

task runScript (dependsOn: 'classes', type: JavaExec) {
    main = 'myscript'
    classpath = sourceSets.main.runtimeClasspath
}

Then, you can execute your script (with output)

hw@hbook:ex $ gradle runScript
:compileJava UP-TO-DATE
:compileGroovy
:processResources UP-TO-DATE
:classes
:runScript
hello world from groovy version 2.0.5

BUILD SUCCESSFUL

Total time: 6.118 secs