`$?` is a uniqued space-separated list of all prerequisites modified after the target was modified `$^` is a uniqued space-separated list of all prerequisites regardless of when the target/prerequisite was modified We want to use the latter since we always want to `cat` all the JS/CSS files, not just the recently edited ones.
Created attachment 423566 [details] Patch
Created attachment 423567 [details] Patch
Comment on attachment 423567 [details] Patch Nice, r=me
Committed r274625: <https://commits.webkit.org/r274625> All reviewed patches have been landed. Closing bug and clearing flags on attachment 423567 [details].
<rdar://problem/75565469>