in src/main/jbake/templates/runonce/OncePerBuild.groovy [19:26]
def execute(jbakeConfig) {
// I used this to test the mechanism, feel
// free to remove this code once this method
// starts doing something useful
// new File("/tmp/sling-site-once.txt").append("The build ran at "
// + new java.util.Date()
// + " with config " + jbakeConfig + "\n")
}