How to set Jenkins environment variables in run-time

Question

I want to set some jenkins environment variables in run time based on my computation. How can i set this run-time in my jenkinsfile's step section.

for example: based on my calculation i get abc=1. How can i set this in real time in my jenkinsfile's step section so that i can use it later by calling $abc.

I am declaring my pipeline and environment variables as explained here: https://jenkins.io/doc/pipeline/tour/environment/

i'm using Jenkins ver. 2.41

Answer 1

Here an example how to set variables and use it in the same Jenkinsfile. The Variable versionToDeploy will be used by the build job step.

pipeline {
    agent any
    stages {
        stage('Example') {
            steps {
                echo 'build the artifacts'
                script {
                    versionToDeploy = '2.3.0'
                }
            }
        }
    }
    post { 
        success { 
            echo 'start deploy job'
            build job: 'pipeline-declarative-multi-job-deploy', parameters: [[$class: 'StringParameterValue', name: 'version', value: versionToDeploy]]
        }
    }
}