Automatically exclude Mill transitive depedencies from build classpath

[lolgab]

Plugins should add Mill dependencies as provided, but sometimes they don't and Mill breaks when you update Mill to a newer version which adds new fields to traits.
Mill could solve the problem by automatically add exclusion rules for mill-scalalib and its other artifacts when adding dependencies to the build via import $ivy..

[lolgab]

This was already fixed in #3189.
I just triggered a new snapshot release for it.

[lolgab]

I tried with the latest snapshot but it doesn't seem to be solved.
Reproduction:

// build.sc
import $ivy.`com.disneystreaming.smithy4s::smithy4s-mill-codegen-plugin::0.18.22`

import mill._
import mill.scalalib._

object root extends RootModule with ScalaModule {
  def scalaVersion = "3.4.2"
}

.mill-version

0.11.7-118-56323c

Errors with:

java.lang.AbstractMethodError: Receiver class millbuild.build$root$ does not define or inherit an implementation of the resolved method 'abstract mill.define.ModuleRef mill$scalalib$JavaModule$$super$zincWorker()' of interface mill.scalalib.JavaModule.
    mill.scalalib.JavaModule.zincWorker(JavaModule.scala:38)
    mill.scalalib.JavaModule.zincWorker$(JavaModule.scala:38)
    millbuild.build$root$.zincWorker(build.sc:27)
    mill.scalalib.ScalaModule.$anonfun$compile$1(ScalaModule.scala:287)
    scala.collection.mutable.HashMap.getOrElseUpdate(HashMap.scala:469)
    mill.moduledefs.Cacher.cachedTarget(Cacher.scala:10)
    mill.moduledefs.Cacher.cachedTarget$(Cacher.scala:9)
    mill.define.Module$BaseClass.cachedTarget(Module.scala:58)
    mill.scalalib.ScalaModule.compile(ScalaModule.scala:280)
    mill.scalalib.ScalaModule.compile$(ScalaModule.scala:280)
    millbuild.build$root$.compile(build.sc:27)
    java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.base/java.lang.reflect.Method.invoke(Method.java:566)
    mill.resolve.Resolve$.$anonfun$instantiateTarget$2(Resolve.scala:96)

[lefou]

I guess to understand this issue better, we should draft an integration test for reproduction. Then we can try to fix this on Mill's side.

[lolgab]

This seems related to #2985

[lefou]

This seems related to #2985

I don't think so. #2985 is explicitly bumping a dependency, which is supposed to be provided by Mill. This is different from resolving a transitive dependency.

[lefou]

The issue is, the exclusion filter introduced in #3189 contains less mill modules and transitive dependencies then I thought, hence the filtering in incomplete.