Greetings! I've written a brief blog that describes how Wikimedia uses
optional build steps as an enhancement to ResourceLoader and our
evolving pipeline. If you use ResourceLoader in your projects, you may
find it helpful:
https://phabricator.wikimedia.org/phame/post/view/206/all_code_is_built/
Thank you to the following reviewers for their great feedback: Jan
Drewniak, Santhosh Thottingal, Daniel Cipoletti, Joe Walsh, Bernd
Sitzmann, and Mónica Pinedo Bajo.
Stephen