CLI does not correctly generate script templates that use the runner

[elliotgunton]

Pre-bug-report checklist

1. This bug can be reproduced using pure Argo YAML

• Yes 👉 Please report a bug to the Argo Workflows GitHub 👈
• No

If yes, it is more likely to be an Argo bug unrelated to Hera. Please double check before submitting an issue to Hera.

2. This bug occurs in Hera when...

• exporting to YAML
• submitting to Argo
• running on Argo with the Hera runner
• other:

Bug report

Describe the bug
A clear and concise description of what the bug is:
See title/repro below

To Reproduce
Full Hera code to reproduce the bug:

1. Create a folder with a Python file in it:

tree .
.
├── hera_example
│   ├── new_decorators.py

2. Add Python code (adapted from new_decorators_basic_script.py example)

from hera.shared import global_config
from hera.workflows import Input, Output, WorkflowTemplate

global_config.experimental_features["decorator_syntax"] = True

w = WorkflowTemplate(name="my-template")

class MyInput(Input):
    user: str

@w.set_entrypoint
@w.script()
def hello_world(my_input: MyInput) -> Output:
    output = Output()
    output.result = f"Hello Hera User: {my_input.user}!"
    return output

3. Run hera generate yaml hera_example/new_decorators.py to get the following yaml:

apiVersion: argoproj.io/v1alpha1
kind: WorkflowTemplate
metadata:
  name: my-template
spec:
  entrypoint: hello-world
  templates:
  - inputs:
      parameters:
      - name: user
    name: hello-world
    script:
      args:
      - -m
      - hera.workflows.runner
      - -e
      - new_decorators:hello_world
      command:
      - python
      env:
      - name: hera__script_annotations
        value: ''
      - name: hera__outputs_directory
        value: /tmp/hera-outputs
      - name: hera__script_pydantic_io
        value: ''
      image: python:3.8
      source: '{{inputs.parameters}}'

Notice that the entrypoint is not hera_example.new_decorators:hello_world, meaning this script would not work as it won't find the module/file when installed in a Docker container.

Expected behavior
A clear and concise description of what you expected to happen:

hera generate should match w.to_yaml() output (when run from a separate Python script) with full module path:

apiVersion: argoproj.io/v1alpha1
kind: WorkflowTemplate
metadata:
  name: my-template
spec:
  entrypoint: hello-world
  templates:
  - inputs:
      parameters:
      - name: user
    name: hello-world
    script:
      args:
      - -m
      - hera.workflows.runner
      - -e
      - hera_example.new_decorators:hello_world
      command:
      - python
      env:
      - name: hera__script_annotations
        value: ''
      - name: hera__outputs_directory
        value: /tmp/hera-outputs
      - name: hera__script_pydantic_io
        value: ''
      image: python:3.8
      source: '{{inputs.parameters}}'

Environment

• hera[experimental]==5.16.2
• Python Version: 3.12.4

Additional context
Add any other context about the problem here.