title: rsync alternative to Jenkins Copy Artifacts plugin?
body: <p>I'm working on a set of builds related to our online images (such as wordpress content).  Overall it's a large workflow, so it's broken into several jobs.</p>
  
  <p>A couple jobs need to copy a large number of artifacts from other jobs; I've been using the Copy Artifacts plugin but it's too slow for my case and rsync would be much better suited.</p>
  
  <p>Is it possible to effectively get the source artifact directory for the upstream build so that I can pass it to rsync in place of using the Copy Artifacts plugin?  I'd like to have a simple script like:</p>
  
  <p><code>rsync -a --delete $UPSTREAM_ARTIFACT_DIR $WORKSPACE</code></p>