Hi *, Quick notice: I spent some time hacking to get Phabricator to build code reviews you publish against the GHC repository. It luckily was not that hard to do so - hooray! Go here for an example: https://phabricator.haskell.org/D64 Look at the top set of information, and find 'Build Status'. This points to the current build being produced for this revision. Icon colors are - red is failed, blue is in progress, green means good. The build is driven by an application called 'Harbormaster'. Harbormaster makes an HTTP request when a new diff is posted, which triggers a build on a backend system that applies the diff and runs ./validate. Now, look at this specific link: https://phabricator.haskell.org/D64#16 I updated the diff, and the build failed and notified Harbormaster. This adds a notification to the page (just below the comment I linked), emails interested parties, and marks the build status at the top. After a build happens, a bot named `phaskell` will drop by and give some results. Validate logs are gzip'd, and uploaded to Phabricator as .txt.gz files. You can download them and look at the full results. If the build fails, the tests that failed are output in the comment on the revision automatically. Builds happen per diff. This means they happen every time you run 'arc diff'. This is all extremely new. Please be nice to it. :) However - if you have some cool changes, please post them! I might just post some to let it do ./validate - it's nice if the machines can just do the work and you can be lazy. :) In the future, Phabricator's Drydock and Harbormaster applications will expand to hopefully do this on their own, with no custom infrastructure from us. We can also utilize resources more effectively. Here's where you can look for the current build queue: https://phabricator.haskell.org/harbormaster/query/all/ The build queue is currently serial - that means the system only runs one build at a time on a 4 core dedicated machine. This simplifies the management but it does mean it could get slightly backed up. It's only a 30 minute wait to validate something though, and that can probably be improved further. Next up: Linking Phabricator to Trac. P.S. The way it works technically is Phabricator -> HTTP GET -> Build machine. This machine runs an HTTP Server - a Python Flask server that simply runs a build script, which reports back to phabricator.haskell.org with JSON requests. Phabricator requests are HTTPS secured. GET requests are securely tunneled over an encrypted pipe (spiped). This build script update Harbormaster's status, post comments, and uploads the build log. Source code: https://github.com/haskell-infra/phab-ghc-builder -- Regards, Austin Seipp, Haskell Consultant Well-Typed LLP, http://www.well-typed.com/