libraries.gradle

ext {
    libs = libsMap(
            slf4j_api: 'org.slf4j:slf4j-api:1.7.16',
            groovy_all: 'org.codehaus.groovy:groovy-all:2.4.6',
            groovy: 'org.spockframework:spock-core:1.0-groovy-2.4',
            http_builder: 'org.codehaus.groovy.modules.http-builder:http-builder:0.7.2',
            logback: 'ch.qos.logback:logback-classic:1.1.5',
            gpars: "org.codehaus.gpars:gpars:1.2.1"
    )
}

def libsMap(Map<String, ?> map) {
    def processMap
    processMap = { innerMap ->
        innerMap.each {
            if (it.value instanceof Map) {
                innerMap[it.key] = processMap(it.value)
            }
        }
        innerMap.asImmutable().withDefault {
            throw new InvalidUserDataException(
                    "No entry '$it' in dependency map (candidates: ${innerMap.keySet().sort().join(", ")})" )
        }
    }
    processMap(map)
}