Is the following expression a valid check for successCondition in the ResourceTemplate

[nitishm]

https://argoproj.github.io/argo-workflows/fields/#fields_39

successCondition: func() string {
   res := successCheck() // Do some checks
  if  res {
    return "true"
  }
  return "false"
}()

[terrytangyuan]

The current implementation uses https://pkg.go.dev/k8s.io/apimachinery/pkg/labels#Parse to parse the success and failure conditions. You can read more about the syntax in the documentation.

[nitishm]

Tried reading the docs but I still don't understand how it knows to parse the status field of the k8s resource. I understand labels in the context of the metadata but am having a hard time figuring out how this works.

[terrytangyuan]

It’s using https://github.com/tidwall/gjson to get the field from a k8s resource object. Related code:

• argo-workflows/workflow/executor/resource.go

  Line 235 in bdd44c7

  func matchConditions(jsonBytes []byte, successReqs labels.Requirements, failReqs labels.Requirements) (bool, error) {

  
  *

  argo-workflows/workflow/executor/resource.go

  Line 129 in bdd44c7

  // Get returns the value for the provided label.