Add aliases to coverage options

Author: TheElectronWill

compiler/src/dotty/tools/dotc/Compiler.scala

@@ -59,7 +59,7 @@ class Compiler {
 
   /** Phases dealing with the transformation from pickled trees to backend trees */
   protected def transformPhases: List[List[Phase]] =
-    List(new InstrumentCoverage) ::  // Perform instrumentation for code coverage (if -coverage setting is set)
+    List(new InstrumentCoverage) ::  // Perform instrumentation for code coverage (if -coverage-out is set)
     List(new FirstTransform,         // Some transformations to put trees into a canonical form
          new CheckReentrant,         // Internal use only: Check that compiled program has no data races involving global vars
          new ElimPackagePrefixes,    // Eliminate references to package prefixes in Select nodes

compiler/src/dotty/tools/dotc/config/ScalaSettings.scala

@@ -117,8 +117,8 @@ trait CommonScalaSettings:
   val unchecked: Setting[Boolean] = BooleanSetting("-unchecked", "Enable additional warnings where generated code depends on assumptions.", initialValue = true, aliases = List("--unchecked"))
   val language: Setting[List[String]] = MultiStringSetting("-language", "feature", "Enable one or more language features.", aliases = List("--language"))
   /* Coverage settings */
-  val coverageOutputDir = PathSetting("-coverage-out", "Destination for coverage classfiles and instrumentation data.", "")
-  val coverageSourceroot = PathSetting("-coverage-sourceroot", "An alternative root dir of your sources used to relativize.", ".")
+  val coverageOutputDir = PathSetting("-coverage-out", "Destination for coverage classfiles and instrumentation data.", "", aliases = List("--coverage-out"))
+  val coverageSourceroot = PathSetting("-coverage-sourceroot", "An alternative root dir of your sources used to relativize.", ".", aliases = List("--coverage-sourceroot"))
 
   /* Other settings */
   val encoding: Setting[String] = StringSetting("-encoding", "encoding", "Specify character encoding used by source files.", Properties.sourceEncoding, aliases = List("--encoding"))