Minimal Gradle Build file for Groovy project creation

build.gradle

apply plugin: 'groovy'
apply plugin: 'idea'

task initProject(description: 'Initialize project directory structure.') << {
    // Default package to be created in each src dir.
    def defaultPackage = 'com/robbyp/greg'

    ['java', 'groovy', 'resources'].each {
        // convention.sourceSets contains the directory structure
        // for our Groovy project. So we use this struture
        // and make a directory for each node.
        sourceSets*."${it}".srcDirs*.each { dir ->
            def newDir = new File(dir, defaultPackage)
            logger.info "Creating directory $newDir"  // gradle -i shows this message.
            newDir.mkdirs()  // Create dir.
        }
    }
}

task wrapper(type: Wrapper) {
    gradleVersion = '1.0'
}