Gitflow and triggering snapshot dependencies for maven multimodule builds

[Richard Hierlmeier]

I try to setup Jenkins Job for a Maven multimodule build. The development team likes to follow a gitflow workflow.

• We use a Bitbucket Team Project

• We have a develop branch that builds and deploys the SNAPSHOT versions to nexus.

• Each feature is developed in a separate feature branch. The feature branches only install, but do not deploy the artifacts.

• It is normal that the poms of the feature branch has the same version number as the branch of the develop branch.

Is setup the following pipeline for this job:

def branchType = getBranchType "${env.BRANCH_NAME}"

def buildGoals = "clean install"
if (branchType == "dev") {
    buildGloals = "clean deploy"
}

pipeline {
    agent {
        node { label 'maven' }
    }
    triggers {
        upstream(upstreamProjects: 'Nightly Build Trigger', threshold: hudson.model.Result.SUCCESS)
        snapshotDependencies()
    }
    stages {
        stage('Build and Deploy') {
            steps {
                withMaven(
                        mavenLocalRepo: '.repository'
                        ) {
                            sh "mvn ${buildGoals}"
                        }
            }
        }
    }
}

In the config of the Bitbucket Team Project I selected the option "Build whenever a SNAPSHOT dependency is built" in the section ""Scan Organization Folder Triggers":

My multi module build has two artifacts: A 1.0.0-SNAPSHOT and B 1.0.0-SNAPSHOT. B depends on A.
The version numbers in the feature branch and in the develop branch are equal.

I run now the in the following problem:

Build of develop branch builds A 1.0.0-SNAPSHOT  -> Build of feature branch is triggered, because module B has module A 1.0.0-SNAPSHOT as dependency
Build of feature branch builds A 1.0.0-SNAPSHOT -> Build of develop branch is triggered, because moduel B has module A 1.0.0-SNAPSHOT as dependnecy.

We have an infinite loop.

How can we avoid this situation?

I tried the following:

triggers {
   upstream(upstreamProjects: 'Nightly Build Trigger', threshold: hudson.model.Result.SUCCESS)
   if (branchType == "dev" ) {      
      snapshotDependencies()
   }
}

But I get a syntax error.

[Richard Hierlmeier]

It seems that this is a known problem. I found the following Jira issue: JENKINS-47996