This repo recreates the set up of my project, in which you can see the issue with as little stuff as I could manage.
This line (20) silently breaks the Scala.js module fastOpt compilation:
def scalacPluginIvyDeps = Agg(ivy"org.wartremover:::wartremover:2.4.5")When compiling a Scala.js project using Mill, the classes definied in the project are not included in the resulting out.js file. In the browser, the error you get in the console is:
ReferenceError: ClearColor is not defined
The line that triggers the bad behaviour is:
def scalacPluginIvyDeps = Agg(ivy"org.wartremover:::wartremover:2.4.5")If you comment it out, the fastOpt output is consistently:
Linker: Compute reachability: 151171 us
Linker: Assemble LinkedClasses: 197694 us
Basic Linking: 495893 us
Emitter: Class tree cache stats: reused: 252 -- invalidated: 260
Emitter: Method tree cache stats: resued: 0 -- invalidated: 1002
Emitter (write output): 316585 us
...and that works. Put the line wartremover line back in, you get:
Linker: Compute reachability: 169524 us
Linker: Assemble LinkedClasses: 215669 us
Basic Linking: 552414 us
Emitter: Class tree cache stats: reused: 249 -- invalidated: 258
Emitter: Method tree cache stats: resued: 0 -- invalidated: 969
Emitter (write output): 364436 us
Which does not work.
Have tried wartremover 2.4.3, 2.4.4, and 2.4.5.
In my real project, the resulting JS file is 380kb instead of the expected 4.7Mb.
There is a simple build script to get you started that replicates my use case:
bash localbuild.shThe project has a shared library that is published to your local ivy cache as foobar#shared.
foo-sbt and foo-mill are identical more or less, and both produce a fastOpt(JS) output file.
Both can be tested be going into their respective testharness folder and running:
npm install
npm startThen navigating to http://localhost:1234/.
Comment / uncomment line 20 of foo-mill/build.sc and rebuild with mill foo.fastOpt.
Note I've been deleting the out directory between builds just to ensure a clean build.