config.yml

#@ load("@ytt:data", "data")
#@ load("@ytt:template", "template")

#@ def dep_yaml(deployment):
#@ key = "deploy:{}".format(deployment.name)
#@ return {key: {"script": deployment.script}}
#@ end

#@ for deployment in data.values.deployments:
  _: #@ template.replace(dep_yaml(deployment))
#@ end

values.yml

#@data/values
---
deployments:
    -   name: develop
        script: ./bin/deploy/develop.sh
    -   name: staging
        script: ./bin/deploy/staging.sh
    -   name: productive
        script: ./bin/deploy/productive.sh