expression-destructure-json.yaml

apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: expression-destructure-json-
  annotations:
    workflows.argoproj.io/version: ">= 3.1.0"
spec:
  arguments:
    parameters:
      - name: config
        value: '{"a": "1", "b": "2", "c": "3"}'
  entrypoint: main
  templates:
    - name: main
      inputs:
        parameters:
          - name: a
            value: "{{=jsonpath(workflow.parameters.config, '$.a')}}"
          - name: b
            value: "{{=jsonpath(workflow.parameters.config, '$.b')}}"
          - name: c
            value: "{{=jsonpath(workflow.parameters.config, '$.c')}}"
      script:
        env:
          - name: A
            value: "{{inputs.parameters.a}}"
          - name: B
            value: "{{inputs.parameters.b}}"
          - name: C
            value: "{{inputs.parameters.c}}"
        image: debian:9.4
        command: [bash]
        source: |
          echo "$A$B$C"