How to set the project name/group/version, plus {source,target} compatibility in the same file?

gradle.properties:

theGroup=some.group
theName=someName
theVersion=1.0
theSourceCompatibility=1.6

settings.gradle:

rootProject.name = theName

build.gradle:

apply plugin: "java"

group = theGroup
version = theVersion
sourceCompatibility = theSourceCompatibility