Jenkins Pipeline - wait for non-job items (ComputedFolder, Multibranch Pipeline Project)

[Amedee Van Gasse]

I'm using multibranch pipelines projects in Jenkins.

I let Jenkins index new branches.

I need Jenkins to wait until indexing of a multibranch pipeline project is complete.

This is my current code:

    def triggerScanMultibranchPipeline(projectDir, repo) {

        def multibranchProject = Jenkins.instance.getItemByFullName "$projectDir/$repo"

        multibranchProject.scheduleBuild()

        while (multibranchProject == null || multibranchProject.isDisabled()) {

            sleep 1000 //1000 milliseconds = 1 second

        }

        sleep time: 1, unit: 'SECONDS'

    }

Already tried:

* change (second) sleep to 30 seconds

This increases duration of the build each time `triggerScanMultibranchPipeline` is called.

I cannot use `"wait: true"` for the indexing to complete, because waiting for non-job items is not supported.

See https://github.com/jenkinsci/pipeline-build-step-plugin/blob/pipeline-build-step-2.13/src/main/java/org/jenkinsci/plugins/workflow/support/steps/build/BuildTriggerStepExecution.java#L80

How can I let Jenkins wait until the branch indexing of the Multibranch Pipeline Project is complete?