Jenkinsfile that extract git info, build multi-stage docker image, push to nexus and deploy to kubernetes

Jenkinsfile

node {
    def rock

    def branch
    def commit

    def nexussrv = "nexus.example.de"
    def nexussrv_office = "${nexussrv}:8843"
    def nexussrv_datacenter = "${nexussrv}:9843"

    stage('Clone repository') {
        def scmVars = checkout scm

        origin_branch = scmVars.GIT_BRANCH
        branch = origin_branch.tokenize('/')[1]
        long_commit = scmVars.GIT_COMMIT
        commit = long_commit.take(8)
    }

    stage('Install dependencies') {
        docker.build("rock/dependencies", "-f docker/000-Dependencies.Dockerfile .")
    }

    stage('Test') {
        docker.build("rock/test", "-f docker/111-Test.Dockerfile .")
    }

    stage('Build') {
        docker.build("rock/build", "-f docker/222-Build.Dockerfile .")
    }

    stage('Package') {
        rock = docker.build("ll/rock", "-f docker/333-Nginx.Dockerfile .")
    }

    stage('Push image') {
      switch (branch) {
        case "master":
          docker.withRegistry("http://${nexussrv_office}", 'nexus-credentials') {
            rock.push("latest")
            rock.push("${commit}")
          }
        default:
          docker.withRegistry("http://${nexussrv_office}", 'nexus-credentials') {
            rock.push("${branch}")
            rock.push("${commit}")
          }
      }
    }

    stage('Deploy into Kubernetes') {
      switch (branch) {
        case "master":
            sh("kubectl set image deployment/rock rock=${nexussrv_datacenter}/ll/rock:${commit} --namespace=staging --context kube01")
            sh("kubectl set image deployment/rock rock=${nexussrv_datacenter}/ll/rock:${commit} --namespace=staging --context kube02")
        default:
            echo "docker image: ${nexussrv_office}/ll/rock:${commit} created."
      }
    }
}