Add -optimise as a separate matrix test

Bootstrap with -optimise is almost twice slower, until that's improved it's probably best to bootstrap without.

Author: OlivierBlanvillain

.drone.yml

@@ -1,8 +1,8 @@
 # After updating this file, you need to re-sign it:
 #
 # - Install [drone-cli](http://readme.drone.io/usage/getting-started-cli/)
-# - Copy your token from  http://dotty-ci.epfl.ch/account (Click SHOW TOKEN)
-# - (export DRONE_TOKEN=your-token; export DRONE_SERVER=http://dotty-ci.epfl.ch; drone sign lampepfl/dotty)
+# - Copy your token from http://dotty-ci.epfl.ch/account (Click SHOW TOKEN)
+# - DRONE_TOKEN=your-token DRONE_SERVER=http://dotty-ci.epfl.ch drone sign lampepfl/dotty
 #
 # Please note that the signing can only be done by collaborators.
 
@@ -76,3 +76,5 @@ matrix:
       CI_PUBLISH: false
     - CI_TEST: dotty-bootstrapped/test
       CI_PUBLISH: false
+    - CI_TEST: ;set bootstrapOptimised in ThisBuild := true ;dotty-bootstrapped/test
+      CI_PUBLISH: false

.drone.yml.sig

@@ -1 +1 @@
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project/Build.scala

@@ -25,6 +25,7 @@ import org.scalajs.sbtplugin.ScalaJSPlugin.autoImport._
 object ExposedValues extends AutoPlugin {
   object autoImport {
     val bootstrapFromPublishedJars = Build.bootstrapFromPublishedJars
+    val bootstrapOptimised = Build.bootstrapOptimised
   }
 }
 
@@ -52,6 +53,7 @@ object Build {
   val JENKINS_BUILD = "dotty.jenkins.build"
   val DRONE_MEM = "dotty.drone.mem"
 
+
   val agentOptions = List(
     // "-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=5005"
     // "-agentpath:/home/dark/opt/yjp-2013-build-13072/bin/linux-x86-64/libyjpagent.so"
@@ -84,12 +86,14 @@ object Build {
   lazy val dottydoc = inputKey[Unit]("run dottydoc")
 
   lazy val bootstrapFromPublishedJars = settingKey[Boolean]("If true, bootstrap dotty from published non-bootstrapped dotty")
+  lazy val bootstrapOptimised = settingKey[Boolean]("Bootstrap with -optimise")
 
   // Used in build.sbt
   lazy val thisBuildSettings = Def.settings(
     // Change this to true if you want to bootstrap using a published non-bootstrapped compiler
     bootstrapFromPublishedJars := false,
 
+    bootstrapOptimised := false,
 
     // Override `runCode` from sbt-dotty to use the language-server and
     // vscode extension from the source repository of dotty instead of a
@@ -167,8 +171,6 @@ object Build {
     // otherwise sbt 0.13 incremental compilation breaks (https://github.com/sbt/sbt/issues/3142)
     scalacOptions ++= Seq("-bootclasspath", sys.props("sun.boot.class.path")),
 
-    scalacOptions += "-optimise",
-
     // sbt gets very unhappy if two projects use the same target
     target := baseDirectory.value / ".." / "out" / "bootstrap" / name.value,
 
@@ -177,6 +179,13 @@ object Build {
     // ...but scala-library is
     libraryDependencies += "org.scala-lang" % "scala-library" % scalacVersion,
 
+    scalacOptions ++= {
+      if (bootstrapOptimised.value)
+        Seq("-optimise")
+      else
+        Seq()
+    },
+
     ivyConfigurations ++= {
       if (bootstrapFromPublishedJars.value)
         Seq(Configurations.ScalaTool)