Jenkins multibranch pipeline Scan without execution - jenkins

Question

Is it possible to Scan a Multibranch Pipeline to detect the branches with a Jenkinsfile, but without the pipeline execution?
My projects have different branches and I don't want that all the children pipelines branches with a Jenkinsfile to start to execute when I launch a build scan from the parent pipeline multibranch.

Answer 1

In your Branch Sources section you can add a Property named Suppress automatic SCM triggering.
This prevents Jenkins from building everything with an Jenkinsfile.

Answer 2

Also, you can do it programatically
import jenkins.branch.*
import jenkins.model.Jenkins
for (f in Jenkins.instance.getAllItems(jenkins.branch.MultiBranchProject.class)) {
if (f.parent instanceof jenkins.branch.OrganizationFolder) {
continue;
}
for (s in f.sources) {
def prop = new jenkins.branch.NoTriggerBranchProperty();
def propList = [prop] as jenkins.branch.BranchProperty[];
def strategy = new jenkins.branch.DefaultBranchPropertyStrategy(propList);
s.setStrategy(strategy);
}
f.computation.run()
}
This is a Groovy snippet you can execute in Jenkins, it's gonna do the scanning but will not start new "builds" for all discovered branches.

Answer 3

If you are using job-dsl you could simply do this and it will scan everything without actually running the build the first time you index.
organizationFolder('Some folder name') {
buildStrategies {
skipInitialBuildOnFirstBranchIndexing()
}
}

Answer 4

To add to #Stqs's answer, you could also set noTriggerBranchProperty it using Job DSL plugin, e.g.:
multibranchPipelineJob('example') {
...
branchSources {
branchSource {
...
strategy {
defaultBranchPropertyStrategy {
props {
// Suppresses the normal SCM commit trigger coming from branch indexing
noTriggerBranchProperty()
...
}
}
}
}
}
...
}

Answer 5

organizationFolder('my-folder') {
buildStrategies {
buildRegularBranches()
buildChangeRequests {
ignoreTargetOnlyChanges true
ignoreUntrustedChanges false
}
}
}
Note: plugin basic-branch-build-strategies is required
REFERENCES:
https://issues.jenkins.io/browse/JENKINS-63799
http://jenkins-ci.361315.n4.nabble.com/JobDSL-an-example-of-configuring-a-bitbucket-source-trait-of-bitbucketForkDiscovery-in-the-multibrand-td5014968.html#a5015085

Answer 6

After much struggle I've found this solution, it should only avoid triggering the build when branch indexing and not disable automatic build after commit. Just add it in the first stage of your project:
when {
not {
expression {
def causes = currentBuild.getBuildCauses()
String causesClass = causes._class[0]
return causesClass.contains('BranchIndexingCause')
}
}
}