unfork scala-js (fatal warnings issue)

[SethTisue]

I tried:

commands += "set every scalacOptions -= \"-Xfatal-warnings\""

but it looks like -= and set every don't like each other:

[scala-js] Cyclic reference involving 
[scala-js]    {file:/home/jenkins/workspace/scala-2.12.x-integrate-community-build/target-0.9.1/project-builds/scala-js-fc1ee6e96289c6fc597166f4987765ab422ca46f/}scalajs/*:scalacOptions
[scala-js]    */*:scalacOptions
[scala-js]  at sbt.Dag$Cyclic.$colon$colon(Dag.scala:67)

perhaps some incantation involving in ThisBuild or in Global would do the trick. if not, maybe contribute an upstream patch that makes this easier to control

[SethTisue]

ah, it wasn't just that I couldn't find the right sbt gymnastics, the lack of a good solution for this general problem is lightbend-labs/dbuild#144

[SethTisue]

once #185 is fixed, we just need to generalize appendScalacOptions a little so removeScalacOptions is supported as well