Jenkins: Ignore failure in pipeline build step

Question

With jenkins build flow plugin this was possible:

ignore(FAILURE){
    build( "system-check-flow" )
}

How to do this with Declarative Pipeline syntax?

Answer 1

To ignore a failed step in declarative pipeline you basically have two options:

1. Use script step and try-catch block (similar to previous proposition by R_K but in declarative style)

stage('someStage') {
    steps {
        script {
            try {
                build job: 'system-check-flow'
            } catch (err) {
                echo err.getMessage()
            }
        }
        echo currentBuild.result
    }
}

2. Use catchError

stage('someStage') {
    steps {
        catchError {
            build job: 'system-check-flow'
        }
        echo currentBuild.result
    }
}

In both cases the build won't be aborted upon exception in build job: 'system-check-flow'. In both cases the echo step (and any other following) will be executed.

But there's one important difference between these two options. In first case if the try section raises an exception the overall build status won't be changed (so echo currentBuild.result => SUCCESS). In the second case you overall build will fail (so echo currentBuild.result => FAILURE).

This is important, because you can always fail the overall build in first case (by setting currentBuild.result = 'FAILURE') but you can't repair build in second option (currentBuild.result = 'SUCCESS' won't work).