Create an empty class to enforce resolving ivy deps by mill for dummy modules (#1374)

When IntelliJ import scala-cli BSP project, it throws dummy.amm[2.13.4].bspCompileClassesPath java.lang.NullPointerException. To fix it, scala-cli creates dummy class to enforce compiling module by mill

Author: lwronski

build.sc

@@ -142,21 +142,13 @@ object dummy extends Module {
     def ivyDeps = Agg(
       Deps.ammonite
     )
-    def compile = T {
-      resolvedRunIvyDeps()
-      null: mill.scalalib.api.CompilationResult
-    }
   }
   object scalafmt extends ScalaModule with Bloop.Module {
     def skipBloop    = true
     def scalaVersion = Scala.defaultInternal
     def ivyDeps = Agg(
       Deps.scalafmtCli
     )
-    def compile = T {
-      resolvedRunIvyDeps()
-      null: mill.scalalib.api.CompilationResult
-    }
   }
 }
 

modules/dummy/amm/src/main/scala/AmmDummy.scala

@@ -0,0 +1,3 @@
+/** Create an empty class to enforce resolving ivy deps by mill for `amm` module
+  */
+class AmmDummy

modules/dummy/scalafmt/src/main/scala/ScalafmtDummy.scala

@@ -0,0 +1,3 @@
+/** Create an empty class to enforce resolving ivy deps by mill for `scalafmt` module
+  */
+class ScalafmtDummy