title: Jenkins - How to pass parameters from a downstream job to its parent upstream?
body: <p>After cracking the reverse problem, I now need to pass some simple data back from each downstream job to its parent.
  One obvious option is to write the data to a file, save it as an artifact and then have the parent upstream job retrieve the artifacts of all its downstream jobs.</p>
  
  <p>Any other idea? I have not seen any plugins for this and both the Build Pipeline and Workflow plugin seem to be overkill for this.</p>
  
  <p>Thanks,
  Amir</p>