How do I add a build step to a Jenkins job programmatically?

Question

I am writing a Jenkins plugin, and I want it to create a new job (in the perform(...) method, as a build step).

I know that I can create a job like this:

 FreeStyleProject proj =
       Hudson.getInstance().createProject(FreeStyleProject.class, "New job");

and I can add properties to it using proj.addProperty(someJobProperty).

How can I then also add a build step to the project, programmatically, like the properties? Specifically, I would like to add an Execute shell and Copy Artifact build step.

I have been looking through the Jenkins JavaDoc, especially the Job page, and I haven't been able to find anything that would help me.

Answer 1

The project has a method getBuildersList() which returns the list of all the build steps. You can add a build step to the project by simply adding a build step to the list returned by this method. The object you are adding to the list must be a Builder.

I did it like this (using the plugin from the Jenkins HelloWorld tutorial as an example):

proj.getBuildersList().add(new HelloWorldBuilder("Bobbly"));

This adds a Hello World build step to the project.

Similarly, there is a getPublishersList() method which returns the list of all the post-build steps and contains Publisher objects.