[FIXED] How i can add conditional steps in jenkinsfile

Issue

Im trying to perform multiple steps in Jenkinsfile, these steps are containing shell commands which is taking time until i get the final output.

since these steps are dependent on each other, how i can add condition if the output of first cmd is equal to something ("session started")then perform the 2nd, if not then print some message =("string").

stage() {

    agent {
        docker {
            label 'MyDocker',
            image 'myIMG'
        }
    }

    steps {
        sh label: 'Creating container', script: 'docker run --privileged -d -p 4750:4723 --name mycontainer myimg'
        sh label: 'Building ', script: 'docker exec -it mycontainer test'
    }
}

Solution

If you need conditions like this at steps level, you have to use a script step and write some Groovy code.

stage() { 
    agent {
        docker {
            label 'MyDocker',
            image 'myIMG'
        }
    }
    steps {
        script {
            def output = sh returnStdout: true, label: 'Creating container', script: 'docker run --privileged -d -p 4750:4723 --name mycontainer myimg'
            if( output.indexOf('session started') >= 0 ) {
                sh label: 'Building ', script: 'docker exec -it mycontainer test'
            }
            else {
                echo "This is the output: $output"
            }
        }
    }
}

I've added parameter returnStdout: true to return the output from the shell command.

To check the output I'm using a substring search output.indexOf to make the code more robust. You could of course compare 1:1 by replacing it with output == 'session started'.

Answered By - zett42
Answer Checked By - Candace Johnson (JavaFixing Volunteer)