Jenkins API with Groovy: setUpstreamProjects

[Sverre Moe]

I want to dynamically set the downstream projects with a Groovy script. 

I can get the list of downstream projects, but I cannot find a setter. 

hudson.model.Hudson.instance.items.each { project ->
    if (project.name.equals("myProject")) {
        project.getUpstreamProjects().each { upstreamProject ->
            println("Upstream Project: " + upstreamProject.name)
        }
    }
}

Is it possible to set this value from a Groovy script?

When I create the Post-build Action "Build other projects" and add projectB for projectA. Then projectB will list projectA as a upstream project (should it not be downstream?). This I find confusing because projectA is a library used by projectB. So actually then projectB is a upstream project of projectA.

projectA should list projectB as upstream project, and projectB should list projectA as downstream project.

Or perhaps I am getting the meaning of downstream/upstream wrong:

https://wiki.jenkins-ci.org/display/JENKINS/Terminology

The Groovy script building projectA, should it then set downstream or upstream when it wants to build projectB after a successful build?

[Baptiste Mathus]

Upstream means a project is kind of above of some others in the build lifecycle. See it as a waterfall if you like, and water in a waterfall goes down (more rarely up ;-)).

You also must think of the required building order: to build your final artifact(s). In your case, you must indeed have built projectA before projectB since A is a library used by B. So A is indeed upstream in this regard.

So yes, if you say in A configuration that B should be started after it, then B is indeed downstream to A (and A is upstream to B).

About doing that in Groovy, can't have a look just now, but you have a lot of examples here: https://wiki.jenkins-ci.org/display/JENKINS/Jenkins+Script+Console should be a good starting point.

HTH

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Baptiste <Batmat> MATHUS - http://batmat.net
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[Sverre Moe]

Have not found any code examples of how to set upstream projects. Neither does it seems possible with the Jenkins API.

I tried to add directly in config.xml

<upstreamProject>myLib++</upstreamProject>

<upstreamProject>myLib2++</upstreamProject>

But it didn't take.

According to both JSON and XML schema both downstreamProject and upstreamProject should be possible.