Jenkinsfile Multibranch Pipeline Github Maven Checkout Directory Issues

[Tony Murphy]

Hi

I'm using the new Jenkins Pipelines and I need some help.

I was under the illusion that once I setup my multi branch pipeline that was it as far as checkouts and branch management was concerned. But it seems that I was mistaken.

I had issues where for example mvn command was not running in the directory were the code was checkout out to. The command seemed to be running in a <branch_name> folder, while the code was in a sibling folder with a <branch_name>@scripts name (hope that makes sense)

`checkout scm` does not work for me btw

I would be grateful if someone could confirm I'm on the right track, could suggest improvements or confirm that it won't always be like this :)

#!groovy

githubCredentials = 'github_credentials'
def projectBranch = "${env.BRANCH_NAME}"

node {

    def javaHome = tool "java8" // ensure Java 8 is installed
    def projectRepoURL = 'g...@github.com:tonymurphy/jenkins-test.git'
    echo "${env.getEnvironment()}"
    def mvnHome  = tool "mvn-3.2.2"

    wrap([$class: 'AnsiColorBuildWrapper', colorMapName: 'xterm']) {

        stage "Checkout"
        sh("git config --global credential.helper cache")
        checkout([$class           : 'GitSCM',
                  branches         : [[name: projectBranch]],
                  extensions       : [[$class: 'RelativeTargetDirectory', relativeTargetDir: 'jenkins-test'], [$class: 'CheckoutOption', timeout: 100000]],
                  userRemoteConfigs: [[credentialsId: githubCredentials, url: projectRepoURL]]])

        stage 'Build'
        withEnv(["PATH+ACTIVATOR=${tool 'activator-1.3.x'}", "PATH+JDK=${javaHome}/bin", "JAVA_HOME=${javaHome}"]) {
            dir("jenkins-test") {
                sh "${mvnHome}/bin/mvn clean compile test "
                step([$class: 'ArtifactArchiver', artifacts: '**/target/*.jar', fingerprint: true])
                step([$class: 'JUnitResultArchiver', testResults: '**/target/surefire-reports/TEST-*.xml'])

            }
        }
    }
}

Thanks!

[Baptiste Mathus]

Not sure I get what your actual issue is. Could you maybe rephrase it to say what you see, compared to what you expect, and provide the error logs and so on?

Cheers

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[Tony Murphy]

Sorry, I wasn't clear

1. I created a simple maven project (https://github.com/tonymurphy/jenkins-test), the Jenkins file did not have any checkout step (code sample below).
   
2. I created a multibranch pipeline project using Jenkins 2. Jenkins then indexed the branches. I was able to use the Jenkins UI to run the build
3. On running the build, ${mvnHome}/bin/mvn clean compile test failed, the error was pom.xml not found
4. I determined that the mvn command had been running from the "wrong" directory
   
5. I then had to add the checkout step, adding code to check out the branch, add also switch into code check out folder dir("jenkins-test")
   
6. I really like the new Jenkins pipeline - but the additional steps were not obvious and unexpected. I suspect I'm missing something, and my "workaround" is heavy handed
   

-- broken Jenkins file

I hope this makes more sense

Thanks

#!groovy

node {

    def javaHome = tool "java8" // ensure Java 8 is installed
    def projectRepoURL = 'g...@github.com:tonymurphy/jenkins-test.git'
    echo "${env.getEnvironment()}"
    def mvnHome  = tool "mvn-3.2.2"

    wrap([$class: 'AnsiColorBuildWrapper', colorMapName: 'xterm']) {

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[Baptiste Mathus]

Step 5, you say you added a checkout step, but can't see it. Why didn't you leave it? It's indeed required to have the sources.

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