[Gradle] get project path

printpath.gradle

task printpath << {
    println "current project path: $projectDir"
    def parentDirPath = parent.projectDir
    println "parent project path: $parentDirPath"
    def rootDirPath = rootProject.projectDir
    println "root project path: $rootDirPath"
    println "root project path: $rootDir" // this will be same as above.
}