How to specify when branch NOT (branch name) in jenkinsfile?

Question

How can I specify something like the following in my Jenkinsfile?

when branch not x

I know how to specify branch specific tasks like:

stage('Master Branch Tasks') {         when {             branch "master"         }         steps {           sh '''#!/bin/bash -l           Do some stuff here           '''         } } 

However I'd like to specify a stage for when branch is not master or staging like the following:

stage('Example') {     if (env.BRANCH_NAME != 'master' && env.BRANCH_NAME != 'staging') {         echo 'This is not master or staging'     } else {         echo 'things and stuff'     } } 

However the above does not work and fails with the following errors:

WorkflowScript: 62: Not a valid stage section definition: "if   WorkflowScript: 62: Nothing to execute within stage "Example"  

Note source for my failed try: https://jenkins.io/doc/book/pipeline/syntax/#flow-control

Answer 1

With this issue resolved, you can now do this:

stage('Example (Not master)') {    when {        not {            branch 'master'        }    }    steps {      sh 'do-non-master.sh'    } }