can we support variables in workflow templateRef name?

[larrycai]

it could be quite big topic to see whether workflowtemplate can support version like github actions (it needs to involve argocd as well), but start small one

Whether we can have variables in workflow templateRef name?

Like the $wftversion in templateRef

Use case

• deployed workflow template in different versions, needs to switch fast by global variables
• it can be used during debug as well, since product flow points to latest stable one

see code sample

apiVersion: argoproj.io/v1alpha1
kind: WorkflowTemplate
metadata:
  name: hello-world-at-v0.1.0
spec:
  templates:
    - name: hello-world
      inputs:
        parameters:
          - name: msg
            value: "hello world"
      container:
        image: docker/whalesay
        command: [cowsay]
        args: ["{{inputs.parameters.msg}}"]
---
apiVersion: argoproj.io/v1alpha1
kind: WorkflowTemplate
metadata:
  name: hello-world-at-master
spec:
  templates:
    - name: hello-world
      inputs:
        parameters:
          - name: msg
            value: "hello world"
      container:
        image: docker/whalesay
        command: [cowsay]
        args: ["{{inputs.parameters.msg}}"]
---
apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: hello-world-local-arg-
spec:
  entrypoint: whalesay
  arguments:
    parameters:
      - name: wftversion
        value: master
  templates:
    - name: whalesay
      steps:
        - - name: hello-world
            templateRef:
              name: hello-world-at-${wftversion}
              template: hello-world

[DiegoFlop]

I use variables on name of template, but is very limited because only I can use inputs parameters as a variable. Using "{{}}" but I can't use expr, when I use expr I get error on a UI.

I opened an issue #8938

[CRASH-Tech]

Can you show your example?

[br05s]

I would love to see this as well. I either have to define every possibility and use conditions or do a workflow of workflows type setup. The former is not great because there's a lot of copy/paste. I personally don't care for the latter because I like the workflows to all be self-contained instead of submitting a separate workflow for a portion.