Jenkins Pipeline and stash Pull Request Builder not working on PR create/update

Below is the requirement needed to achieve using the Jenkins Pipeline and i am new bee into Jenkins Pipeline.

• After completing development work and pushing his changes to

Bitbucket the user creates a pull request.

• In order to approve a pull request we require at least one successful

Jenkins build. Thereby we would like to get only the build result of
the code checked in for the pull request.

• When a pull request is created/updated Jenkins shall be triggered

automatically for real continuous integration.

• The build result shall be reported back to Bitbucket.

Used Stash Pull Request Builder and stash Notifier for the above process which is working for Normal Freestyle Project.

We need to migrate the similar functionality using Jenkins pipeline, So have created the jenkins job as below.

The pipeline script to checks out the PR branch and trigger build is as below

node {
    stage('Checkout') {         
        checkout(
        [
            $class: 'GitSCM',
            extensions: [               
                [$class: 'CleanCheckout'],              
            ],
            branches: [
                [name: '']
            ], 
            userRemoteConfigs: 
            [[
                credentialsId: 'id', 
                url: 'repourl.git'
                refspec: ('+refs/pull-requests/*/from:refs/remotes/origin/pr/*/from'), 
                branch: ('origin/pr/${pullRequestId}/from')
            ]]
        ])
    }

    stage('Build') {    
        sh 'make'
    }
    stage('notify') {
    step([$class: 'StashNotifier'])
        try {
            // Do stuff
            currentBuild.result = 'SUCCESS'     
        } catch(err) {
            currentBuild.result = 'FAILED'
        }
    step([$class: 'StashNotifier'])
   }

}

Though i have done the above configuration when i create/update the PR, the build is not automatically triggered in jenkins. I guess the notification from stash to jenkins did not happen because we specify `"ori

In groovy script, you need to reference environment variables in a different way than in bash.

So probably this line is causing trouble:

branch: ('origin/pr/${pullRequestId}/from')

Try using:

branch: ('origin/pr/' + env.pullRequestId + '/from')

StackExchange DevOps Q#1525, answer score: 3