The Atom editor plugin language-jenkins highlights the syntax for Jenkinsfile.

However, my Jenkinsfiles are not always named Jenkinsfile, but usually have extension: Jenkinsfile-x86, Jenkinsfile-arm, Jenkinsfile-test, etc.

How would I need to modify the Atom plugin source code in order to support any file name starting with Jenkinsfile*?

This poor man's solution works, but...:

'fileTypes': [
  'Jenkinsfile',
  'Jenkinsfile-x86',
  'Jenkinsfile-arm',
  'Jenkinsfile-test'
]