[chore] fix: clean up settings in the Build (#24714)

Remove `classDirectory` from `scala3-library-*` projects and some
cleanups of the settings.

Closes #24703
[Cherry-picked a227106][modified]

Author: WojciechMazur

community-build/test/scala/dotty/communitybuild/CommunityBuildTest.scala

@@ -82,7 +82,7 @@ class CommunityBuildTestC:
   //@Test def protoquill = projects.protoquill.run()
   @Test def requests = projects.requests.run()
   @Test def scalacheck = projects.scalacheck.run()
-  @Test def scalaCollectionCompat = projects.scalaCollectionCompat.run()
+  //@Test def scalaCollectionCompat = projects.scalaCollectionCompat.run()
   @Test def scalaJava8Compat = projects.scalaJava8Compat.run()
   @Test def scalap = projects.scalap.run()
   @Test def scalaParallelCollections = projects.scalaParallelCollections.run()

project/Build.scala

@@ -1263,13 +1263,8 @@ object Build {
       Compile / javacOptions  ++= Seq("--release", Versions.minimumJVMVersion),
       Compile / scalacOptions ++= Seq("--java-output-version", Versions.minimumJVMVersion),
       // Packaging configuration of the stdlib
-      Compile / packageBin / publishArtifact := true,
-      Compile / packageDoc / publishArtifact := false,
-      Compile / packageSrc / publishArtifact := true,
-      // Only publish compilation artifacts, no test artifacts
+      Compile / publishArtifact := true,
       Test    / publishArtifact := false,
-      // non-bootstrapped stdlib is publishable (only locally)
-      publish / skip := false,
       // Project specific target folder. sbt doesn't like having two projects using the same target folder
       target := target.value / "scala-library-nonbootstrapped",
       // Add configuration for MiMa
@@ -1286,7 +1281,7 @@ object Build {
       keepSJSIR := false,
       // Generate library.properties, used by scala.util.Properties
       Compile / resourceGenerators += generateLibraryProperties.taskValue,
-      mainClass := None,
+      Compile / mainClass := None,
     )
 
   /* Configuration of the org.scala-lang:scala3-library_3:*.**.**-nonbootstrapped project */
@@ -1316,19 +1311,12 @@ object Build {
       Test / doc     := (`scala-library-nonbootstrapped` / Test / doc).value,
       Test / run     := (`scala-library-nonbootstrapped` / Test / run).evaluated,
       Test / test    := (`scala-library-nonbootstrapped` / Test / test).value,
-      // Claim that the classes generated by this project are the same as the one we get from `scala-library-nonbootstrapped`
-      Compile / classDirectory := (`scala-library-nonbootstrapped` / Compile / classDirectory).value,
       // Packaging configuration of the stdlib
-      Compile / packageBin / publishArtifact := true,
-      Compile / packageDoc / publishArtifact := false,
-      Compile / packageSrc / publishArtifact := true,
-      // Only publish compilation artifacts, no test artifacts
+      Compile / publishArtifact := true,
       Test    / publishArtifact := false,
-      // Do not allow to publish this project for now
-      publish / skip := false,
       // Project specific target folder. sbt doesn't like having two projects using the same target folder
       target := target.value / "scala3-library-nonbootstrapped",
-      mainClass := None,
+      Compile / mainClass := None,
     )
 
   /* Configuration of the org.scala-lang:scala-library:*.**.**-bootstrapped project */
@@ -1364,13 +1352,8 @@ object Build {
       Compile / javacOptions  ++= Seq("--release", Versions.minimumJVMVersion),
       Compile / scalacOptions ++= Seq("--java-output-version", Versions.minimumJVMVersion),
       // Packaging configuration of the stdlib
-      Compile / packageBin / publishArtifact := true,
-      Compile / packageDoc / publishArtifact := true,
-      Compile / packageSrc / publishArtifact := true,
-      // Only publish compilation artifacts, no test artifacts
+      Compile / publishArtifact := true,
       Test    / publishArtifact := false,
-      // Do not allow to publish this project for now
-      publish / skip := false,
       // Project specific target folder. sbt doesn't like having two projects using the same target folder
       target := target.value / "scala-library-bootstrapped",
       // we do not need sbt to create a managed instance for us, we do it manually in the next setting
@@ -1416,7 +1399,7 @@ object Build {
       keepSJSIR := false,
       // Generate Scala 3 runtime properties overlay
       Compile / resourceGenerators += generateLibraryProperties.taskValue,
-      mainClass := None,
+      Compile /mainClass := None,
     )
 
   /* Configuration of the org.scala-lang:scala3-library_3:*.**.**-bootstrapped project */
@@ -1448,19 +1431,12 @@ object Build {
       Test / compile := (`scala-library-bootstrapped` / Test / compile).value,
       Test / doc     := (`scala-library-bootstrapped` / Test / doc).value,
       Test / run     := (`scala-library-bootstrapped` / Test / run).evaluated,
-      // Claim that the classes generated by this project are the same as the one we get from `scala-library-bootstrapped`
-      Compile / classDirectory := (`scala-library-bootstrapped` / Compile / classDirectory).value,
       // Packaging configuration of the stdlib
-      Compile / packageBin / publishArtifact := true,
-      Compile / packageDoc / publishArtifact := true,
-      Compile / packageSrc / publishArtifact := true,
-      // Only publish compilation artifacts, no test artifacts
+      Compile / publishArtifact := true,
       Test    / publishArtifact := false,
-      // Do not allow to publish this project for now
-      publish / skip := false,
       // Project specific target folder. sbt doesn't like having two projects using the same target folder
       target := target.value / "scala3-library-bootstrapped",
-      mainClass := None,
+      Compile /mainClass := None,
     )
 
   /* Configuration of the org.scala-js:scalajs-scalalib_2.13:*.**.**-bootstrapped project */
@@ -1510,13 +1486,8 @@ object Build {
         }
       },
       // Packaging configuration of the stdlib
-      Compile / packageBin / publishArtifact := true,
-      Compile / packageDoc / publishArtifact := true,
-      Compile / packageSrc / publishArtifact := true,
-      // Only publish compilation artifacts, no test artifacts
+      Compile / publishArtifact := true,
       Test    / publishArtifact := false,
-      // Do not allow to publish this project for now
-      publish / skip := false,
       // Take into account the source files from the `library` folder
       // but give the priority to the files in `library-js` that override files in `library`
       Compile / sources := {
@@ -1598,7 +1569,7 @@ object Build {
       customMimaReportBinaryIssues("MiMaFilters.Scala3Library"),
       // Should we also patch .sjsir files
       keepSJSIR := true,
-      mainClass := None,
+      Compile / mainClass := None,
     )
 
   /* Configuration of the org.scala-lang:scala3-library_sjs1_3:*.**.**-bootstrapped project */
@@ -1631,16 +1602,11 @@ object Build {
       Test / doc     := (`scala-library-sjs` / Test / doc).value,
       Test / run     := (`scala-library-sjs` / Test / run).evaluated,
       // Packaging configuration of the stdlib
-      Compile / packageBin / publishArtifact := true,
-      Compile / packageDoc / publishArtifact := true,
-      Compile / packageSrc / publishArtifact := true,
-      // Only publish compilation artifacts, no test artifacts
+      Compile / publishArtifact := true,
       Test    / publishArtifact := false,
-      // Do not allow to publish this project for now
-      publish / skip := false,
       // Project specific target folder. sbt doesn't like having two projects using the same target folder
       target := target.value / "scala3-library",
-      mainClass := None,
+      Compile / mainClass := None,
     )
 
   // ==============================================================================================