Autolanding your patch(es) to Try via Bugzilla

We're ready for a soft release of the first step in our very experimental autolanding system. Experimental meaning: we reserve the right to pull the plug, take it down for tweaks, and some information may be lost when bugs arise.  You can check the if the autoland system is up and running by going to http://bit.ly/autoland_status

This is the Try branch only portion of what will become a system to automate and more easily manage multiple branch landings.  Marc Jessome, our returning Release Engineering intern, and myself have this as a Q1 goal.  There are several issues to be resolved with this system and the link above will keep you appraised of what the goals and known issues are. We will be working hard over the next two months to make this a secure, reliable system for landing patches with minimal developer time spent pulling, pushing, and watching tbpl.  The hope is that it will also become a useful tool for Release Coordinators to track that a fix lands across several branches as needed.  Future features will include a bugzilla extension to securely interact with this system and remove the need for whiteboard tag changes and a RESTful API so the whole process could be initiated through the command line.  We appreciate constructive feedback but please hold off on scope creep suggestions :) 

Here's how it works right now:

1. Attach patches to your bug Note: if you (the attacher) do not have permission to push to Try, get an r+ from someone who does
2. Use this documentation to determine the appropriate whiteboard tag and enter it in the bug so our autolanding poller will pick up on your request
3. The autoland system, which tracks all bugs with autolanding requests, will queue up your patchset and then pull it from the queue, apply the list of patches in your bug (or those in the whiteboard tag) to a clean pull of mozilla-central tip, commit each patch as the patch author, and finally push to try as Autoland User
4. A comment will be posted in your bug with the results (hopefully successful) of the push attempt, and the whiteboard tag will read [autoland-in-queue]
5. After all builds complete, their results get posted back to your bug (just like with the current '--post-to-bugzilla Bug #' flag in trychooser) and the [autoland-in-queue] whiteboard tag will be removed

There is a threshold on how many bugs the autoland system will push and track at a given time.  We are curious to learn about usage and load on this system so please give it a try and inform us of any issues in IRC: #build or #developers channels are the best places to find myself (lsblakk) or Marc (mjessome) and chat us up about this initiative.