gistfile1.yml

---
stages:
    network_provisioning: &network_provisioning
       title: Network Provisioning
       env: [ ENV_VAR1, ENV_VAR2 ]
       shell: ip create $ENV_VAR

    storage_provisioning: &storage_provisioning
       title: Storage Provisioning
       shell: shell command 1
       env: []

    vm_provisioning:
       title: VM Provisioning
       shell: shell command 2
       env: []

environments: 
    env_class_1:
        title: Environment Class 2
        stages: 
            network_provisioning: *network_provisioning
            storage_provisioning: *storage_provisioning

        settings:
            networking:
                ip:
                    type: ip_address
                    title: IP Address
                    var: IP_ADDRESS