jenkins job cloning

script.groovy

def projects = [
        "scala-nightly-checkinit",
        "scala-nightly-main",
        "scala-nightly-rangepos",
        "scala-nightly-windows"
]

inst = jenkins.model.Jenkins.instance;
def oldVersion = "2.10.x"
def newVersion = "2.11.x"
for (p in projects) {
  def templateProject = inst.getItem(p + "-" + oldVersion);
  def newProject = inst.copy(templateProject, p + "-" + newVersion);
  println("created " + newProject);
  def branchParam = newProject.actions.find{ it instanceof ParametersDefinitionProperty }?.getParameterDefinition("branch");
  if (branchParam != null) {
     branchParam.setDefaultValue(newVersion) ;
     println("found and updated branch parameter");
  }
}