Jenkinsfile get current tag

Question

Is there a way to get the current tag ( or null if there is none ) for a job in a Jenkinsfile? The background is that I only want to build some artifacts ( android APKs ) when t

Answer 1

An example of declarative pipeline following the OP usecase: "do something if this particular commit has a tag attached":

def gitTag = null
pipeline {
  agent any
  stages {
    stage('Checkout') {
      steps {
        checkout(...)
        script {
          gitTag=sh(returnStdout: true, script: "git tag --contains | head -1").trim()
        }
      }
    }
    stage('If tagged') {
      when {
        expression {
          return gitTag;
        }
      }
      steps {
        // ... do something only if there's a tag on this particular commit
      }
    }
  }
}

In my case, I have:

• one repository for multiple projects
• each one with their own version tags such as 'MYPROJECT_1.4.23'
• and I want to use the second part of the tag '1.4.23' to tag my images for example

I need to analyze the current tag to check if it concerns my pipeline project (using a PROJECT_NAME variable per project):

def gitTag = null
def gitTagVersion = null
pipeline {
  agent any
  stages {
    stage('Checkout') {
      steps {
        checkout(...)
        script {
          gitTag=sh(returnStdout: true, script: "git tag --contains | head -1").trim()
          if(gitTag) {
            def parts = gitTag.split('_')
            if( parts.size()==2 && parts[0]==PROJECT_NAME ) {
              gitTagVersion=parts[1]
            }
          }
        }
      }
    }
    stage('If tagged') {
      when {
        expression {
          return gitTagVersion;
        }
      }
      steps {
        // ... do something only if there's a tag for this project on this particular commit
      }
    }
  }
}

Note that I'm new at Jenkins and Groovy and that this may be written more simply/cleanly (suggestions welcome).

(with Jenkins 2.268)