How to set Jenkins JDK/Environment before deployment?

Question

we want to provide an auto-installer for my company. So that the developers do not have to set up their workbench with a very long installation guide. We managed to provide 90%.

Last week we received an email that we should configure Jenkins during the installation. The first part of configuring the Proxy Setting is via a groovy script.

Groovy file:

pc = new hudson.ProxyConfiguration(name, port, userName, password, noProxyHost);
jenkins.model.Jenkins.instance.proxy = pc;
println "Jenkins-Proxy settings updated!

Commandline

type set setJenkinsProxy.groovy | java -jar jenkins-cli.jar -s 
http://localhost:8080/jenkins groovy =

The next part is to set the already installed JDK. First thought was to use a groovy script to set the JDK.

Groovy file:

jdk = new hudson.model.JDK(name, home, list);
jdklist = []
jdklist.add(jdk)
jenkins.model.Jenkins.instance.JDKs = jdk;
println "JDK settings updated!

Even with a runnable .jar file, that will use the jenkins-cli.jar, it didn't work.

JDK.jar

public static void main(String[] args) {

            JDK jdk = new JDK(args[0], args[1]);

            List<JDK> jdklist = new ArrayList<JDK>();
            jdklist.add(jdk);
            jenkins.model.Jenkins.jdks = jdklist;

            System.out.println("Jenkins JDK set!");

        }

Is there a proper way to set this Environment? I would really appreciate any way of help.

EDIT: Would like to set Jenkins Location as well as Email- Notification too.

Answer 1

and here the example to set the jdk (groovy script executing via commandline)

name = "Java";
home = "C:\\Program Files\\Java\\jdk1.7.0_40";
list = null;

dis = new hudson.model.JDK.DescriptorImpl();
dis.setInstallations( new hudson.model.JDK(name, home));

println "JDK settings updated!"