FewestModules can result in filenames that are greater than 255 Characters

[dispalt]

So I have a private repository where I attempted to break a bunch of scalajs code into modules. Alot of those modules reference the same code, so it creates filenames longer than 255 characters which basically no filesystem supports. I can't share the code but I do feel like someone on the maintainer team would understand how this might happen. So I switched to smallest modules and the problem went away.

Happy to attempt to put something together but figured I'd file the issue first.

[gzm0]

Yeah... The problematic function is here:

scala-js/linker/shared/src/main/scala/org/scalajs/linker/frontend/modulesplitter/MaxModuleAnalyzer.scala

Line 53 in 95c6419

private def buildModuleIDs(publicIDsUnordered: Iterable[ModuleID],

For internal modules we can pretty much chose whatever ID we want, as long as it is somewhat stable (same code should go into same module ID).

I chose this ID pattern so it's easy to understand the origin. Maybe we need to switch to less human readable IDs.