Add non-regression test for forced Scala versions

modules/build/src/main/scala/scala/build/Build.scala

@@ -883,7 +883,8 @@ object Build {
           scalaVersion = params.scalaVersion,
           scalaBinaryVersion = params.scalaBinaryVersion,
           scalacOptions = scalacOptions.toSeq.map(_.value),
-          compilerClassPath = scalaArtifacts.compilerClassPath
+          compilerClassPath = scalaArtifacts.compilerClassPath,
+          bridgeJarsOpt = scalaArtifacts.bridgeJarsOpt
         )
         Some(compilerParams)
 

modules/build/src/main/scala/scala/build/Project.scala

@@ -47,7 +47,8 @@ final case class Project(
     val scalaConfigOpt = scalaCompiler.map { scalaCompiler0 =>
       bloopScalaConfig("org.scala-lang", "scala-compiler", scalaCompiler0.scalaVersion).copy(
         options = updateScalacOptions(scalaCompiler0.scalacOptions).map(_.value),
-        jars = scalaCompiler0.compilerClassPath.map(_.toNIO).toList
+        jars = scalaCompiler0.compilerClassPath.map(_.toNIO).toList,
+        bridgeJars = scalaCompiler0.bridgeJarsOpt.map(_.map(_.toNIO).toList)
       )
     }
     baseBloopProject(
@@ -228,6 +229,7 @@ object Project {
       options = Nil,
       jars = Nil,
       analysis = None,
-      setup = None
+      setup = None,
+      bridgeJars = None
     )
 }

modules/build/src/main/scala/scala/build/ScalaCompilerParams.scala

@@ -4,5 +4,6 @@ final case class ScalaCompilerParams(
   scalaVersion: String,
   scalaBinaryVersion: String,
   scalacOptions: Seq[String],
-  compilerClassPath: Seq[os.Path]
+  compilerClassPath: Seq[os.Path],
+  bridgeJarsOpt: Option[Seq[os.Path]]
 )

modules/integration/src/test/scala/scala/cli/integration/RunTestsDefault.scala

@@ -129,4 +129,41 @@ class RunTestsDefault extends RunTestDefinitions(scalaVersionOpt = None) {
     }
   }
 
+  test("Force Scala version") {
+    val sv = "3.2.2-SNAPSHOT"
+    val inputs = TestInputs(
+      os.rel / "Hello.scala" ->
+        s"""//> using scala "$sv!"
+           |
+           |@main
+           |def hello(): Unit =
+           |  println(s"Hello from Scala $sv")
+           |""".stripMargin
+    )
+    inputs.fromRoot { root =>
+      val repo = root / "repo"
+      for {
+        name <- Seq("scala3-library_3", "scala3-compiler_3", "tasty-core_3", "scala3-sbt-bridge")
+        ext  <- Seq("pom", "jar")
+      } {
+        val strPath = os.proc(
+          TestUtil.cs,
+          "get",
+          s"https://repo1.maven.org/maven2/org/scala-lang/$name/3.3.0-RC1-bin-20230120-d6cc101-NIGHTLY/$name-3.3.0-RC1-bin-20230120-d6cc101-NIGHTLY.$ext"
+        )
+          .call(cwd = root)
+          .out.trim()
+        os.copy(
+          os.Path(strPath, root),
+          repo / "org" / "scala-lang" / name / sv / s"$name-$sv.$ext",
+          createFolders = true
+        )
+      }
+      val res = os.proc(TestUtil.cli, "run", "Hello.scala", "-r", repo.toNIO.toUri.toASCIIString)
+        .call(cwd = root)
+      val output = res.out.trim()
+      expect(output == s"Hello from Scala $sv")
+    }
+  }
+
 }

modules/options/src/main/scala/scala/build/Artifacts.scala

@@ -134,6 +134,15 @@ object Artifacts {
         val compilerDependenciesMessage =
           s"Downloading Scala ${scalaArtifactsParams.params.scalaVersion} compiler"
 
+        val bridgeDependenciesOpt =
+          Option.when(scalaArtifactsParams.params.scalaVersion.startsWith("3.")) {
+            Seq(
+              dep"org.scala-lang:scala3-sbt-bridge:${scalaArtifactsParams.params.scalaVersion}"
+            )
+          }
+        val bridgeDependenciesMessage =
+          s"Downloading Scala ${scalaArtifactsParams.params.scalaVersion} bridge"
+
         val compilerPlugins0 = value {
           scalaArtifactsParams.compilerPlugins
             .map { posDep =>
@@ -165,6 +174,21 @@ object Artifacts {
           ).left.flatMap(_.maybeRecoverWithDefault(Seq.empty, maybeRecoverOnError))
         }
 
+        val bridgeJarsOpt = bridgeDependenciesOpt match {
+          case None => None
+          case Some(bridgeDependencies) =>
+            val jars = value {
+              artifacts(
+                Positioned.none(bridgeDependencies),
+                allExtraRepositories,
+                Some(scalaArtifactsParams.params),
+                logger,
+                cache.withMessage(bridgeDependenciesMessage)
+              ).left.flatMap(_.maybeRecoverWithDefault(Seq.empty, maybeRecoverOnError))
+            }.map(_._2)
+            Some(jars)
+        }
+
         def fetchedArtifactToPath(fetched: Fetch.Result): Seq[os.Path] =
           fetched.fullDetailedArtifacts.collect { case (_, _, _, Some(f)) => os.Path(f, Os.pwd) }
 
@@ -265,7 +289,8 @@ object Artifacts {
           scalaNativeCli,
           internalDependencies,
           scalapyDependencies,
-          scalaArtifactsParams.params
+          scalaArtifactsParams.params,
+          bridgeJarsOpt
         )
         Some(scala)
 

modules/options/src/main/scala/scala/build/ScalaArtifacts.scala

@@ -10,7 +10,8 @@ final case class ScalaArtifacts(
   scalaNativeCli: Seq[os.Path],
   internalDependencies: Seq[AnyDependency],
   extraDependencies: Seq[AnyDependency],
-  params: ScalaParameters
+  params: ScalaParameters,
+  bridgeJarsOpt: Option[Seq[os.Path]]
 ) {
 
   lazy val compilerClassPath: Seq[os.Path] =

modules/options/src/main/scala/scala/build/options/BuildOptions.scala

@@ -258,6 +258,8 @@ final case class BuildOptions(
     val svOpt: Option[String] = scalaOptions.scalaVersion match {
       case Some(MaybeScalaVersion(None)) =>
         None
+      case Some(MaybeScalaVersion(Some(svInput))) if svInput.endsWith("!") =>
+        Some(svInput.stripSuffix("!"))
       case Some(MaybeScalaVersion(Some(svInput))) =>
         val sv = value {
           svInput match {