{
  "name":"My md5 pipeline",
  "components":{
    "do_hash":{
      "repository":"$USER/$USER",
      "script":"hash.py",
      "script_version":"master",
      "runtime_constraints":{
        "docker_image":"arvados/jobs"
      },
      "script_parameters":{
        "input":{
          "required": true,
          "dataclass": "Collection"
        }
      }
    }
  }
}