Pass parameters in a pipeline

In most pipelines, the edges between nodes are defined by outputs and inputs. Edges can be also used to pass parameters between nodes.

- step:
    name: Train model
    image: tensorflow/tensorflow:2.4.1
    command:
    - print "{parameters}"
    - python train.py {parameters}
    parameters:
    - name: user-id
      default: 345345
      multiple-separator: ','
      optional: false
      type: integer

- step:
    name: Test model
    image: tensorflow/tensorflow:2.4.1
    command:
    - print "{parameters}"
    - python train.py {parameters}
    parameters:
    - name: user-id
      default: 3
      multiple-separator: ','
      optional: false
      type: integer

- pipeline:
    name: Parameter to parameter
    nodes:
    - name: train-model
      step: Train model
      type: execution
    - name: test-model
      step: Test model
      type: execution
    edges:
    - [train-model.parameter.user-id, test-model.parameter.user-id]