Jenkinsfile stage when branch regex not working

Question

I have a declarative jenkinsfile setup and one of the stages I need to run when the branch has a certain naming convention. For some reason the stage is not running with the when block added as shown below:

when {
  branch pattern: '^([0-9]{5}-)?(?i)external-resources-.*',
  comparator: 'REGEXP'
}

So the example above I would like the stage to run when the branch matches anything that has the name external-resources in it. All other branches should be ignored.

Thank you for any help you can provide.

VonC_6309 · Answer

You can test first your regexp in regex101.com: adding a (?i) in the middle of it won't work.

As explained in "Grails/Groovy regular expression- how to use (?i) to make everything case insensitive?", you need to put it at the beginning.

(?i)^([0-9]{5}-)?external-resources-.*

Jenkinsfile stage when branch regex not working

1 Answers