expression-tag-template-workflow.yaml

apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: expression-tag-template-
  labels:
    workflows.argoproj.io/test: "true"
  annotations:
    # available in v3.1.0
    workflows.argoproj.io/version: ">= 3.1.0"
spec:
  entrypoint: main
  templates:
    - name: main
      dag:
        tasks:
          - name: task-0
            template: pod-0
            arguments:
              parameters:
                - name: foo
                  value: "{{=item}}"
            # withParam must be a JSON list encoded as a string, so you use `toJson` to perform the conversion
            withParam: "{{=toJson(filter([1, 3], {# > 1}))}}"
    - name: pod-0
      inputs:
        parameters:
          - name: foo
      container:
        image: argoproj/argosay:v2
        # in this example, we use `asInt` to cast a parameter (which are ALWAYS strings) to an int so we can
        # multiple by 10
        args:
          - echo
          - |
            hello {{=asInt(inputs.parameters.foo) * 10}} @ {{=sprig.date('2006', workflow.creationTimestamp)}}
          - /output
      outputs:
        parameters:
          - name: output
            valueFrom:
              path: /output