Regular Expression Matching in Workflow Conditions

[mio4kon]

I am currently working with Argo Workflows and trying to utilize regular expressions in the when conditions of my workflow tasks. Specifically, I am attempting to match a branch name that starts with "release" using the following expression:

when: "{{=jsonpath(workflow.parameters.metaData, '$.repoInfo.branch') =~ '^release.*'}}"

However, I am encountering errors related to the syntax, such as Invalid token: '{{='. It seems that the use of = before the expression is causing issues.

I would like to clarify the correct way to use regular expressions in the when conditions. Is there a specific syntax or method that I should follow to achieve this functionality?

[jswxstw]

The operator of regex in expr-lang is matches, please try as below:

when: "{{=jsonpath(workflow.parameters.metaData, '$.repoInfo.branch') matches '^release.*'}}"

[mio4kon]

Thanks！