google/traceur-compiler — pull request #649 by johnjbarton (2014-01-08 23:36:51+00:00)
Title: Rebuild when any .js file in src/ changes.

The build/dep.mk approach to triggering builds requires
approximately 2x more time per build than the build.
In general we do not include any files in src/ that we
do not compile into traceur.
Therefore simply depending upon src/**/*.js will make
builds faster without triggering extra builds