fix RuleCompiler initialization by propertly setting classpath and ou…

…tputDir

scalafix-reflect/src/main/scala-3/scalafix/internal/reflect/RuleCompiler.scala

@@ -7,6 +7,7 @@ import dotty.tools.dotc.util.SourceFile
 import dotty.tools.dotc.reporting.StoreReporter
 import dotty.tools.dotc.interactive.InteractiveDriver
 import dotty.tools.io.AbstractFile as DottyAbstractFile
+import dotty.tools.io.VirtualDirectory as DottyVirtualDirectory
 
 import scala.reflect.io.VirtualDirectory
 import scala.reflect.io.AbstractFile
@@ -21,21 +22,15 @@ class RuleCompiler(
     classpath: String,
     target: AbstractFile = new VirtualDirectory("(memory)", None)
 ) {
-  // we are not configuring any settings!
-  // private val settings = new Settings()
-  // settings.deprecation.value = true // enable detailed deprecation warnings
-  // settings.unchecked.value = true // enable detailed unchecked warnings
-  // settings.outputDirs.setSingleOutput(target)
-  // settings.classpath.value = classpath
-  private val settings = "-unchecked" :: "-deprecation" :: Nil
-  private val driver = new InteractiveDriver(settings.distinct)
+  private val settings = "-unchecked" :: "-deprecation" :: "-classpath" :: classpath :: Nil
+  private val driver = new InteractiveDriver(settings)
   private val reporter: StoreReporter = new StoreReporter()
   private var ctx: FreshContext = driver.currentCtx.fresh
-
+  private val dottyVirtualDirectory = new DottyVirtualDirectory(target.name, None)
+
   ctx = ctx
     .setReporter(reporter)
-    .setSetting(ctx.settings.outputDir, DottyAbstractFile.getFile(target.path))
-    .setSetting(ctx.settings.classpath, classpath)
+    .setSetting(ctx.settings.outputDir, dottyVirtualDirectory)
 
   private val compiler: Compiler = new Compiler()
   private val classLoader: AbstractFileClassLoader =