Gitops

This example showcases the hello world example of Hera in a GitOps style. The workflow gets a global parameter set called msg. This parameter has neither a value nor a value_from set. This supports the generation of a workflow YAML file that has the full definition and supports submission via argo submit hello.yaml -p msg="hello". This parameterizes the workflow global parameter called msg to have a value of hello. This hello is then passed to the Task via the global parameter w.get_parameter('msg'), which sets the '{{workflow.parameters.msg}}' on the task parameter definition.

from hera import Parameter, Task, Workflow


def say(msg: str):
    print(msg)


with Workflow("hera-gitops-say", parameters=[Parameter('msg')]) as w:
    Task("t", say, inputs=[w.get_parameter('msg')])

with open('hello.yaml', 'w') as f:
    f.write(w.to_yaml())

# the above is followed up by issuing `argo submit hello.yaml -p msg="hello"`