Merge prepareIDE with configureIDE

In the next commit we'll extend configureIDE to work even when it needs
to update some settings to set the scalaVersion to Dotty. Since this
update takes some time and is discarded at the end of the task, it makes
sense to run the configuration and compilation steps in the same task to
avoid having to do the settings update twice.

Author: smarter

project/Build.scala

@@ -94,7 +94,7 @@ object Build {
     // Override `launchIDE` from sbt-dotty to use the language-server and
     // vscode extension from the source repository of dotty instead of a
     // published version.
-    launchIDE := (run in `dotty-language-server`).dependsOn(prepareIDE).toTask("").value
+    launchIDE := (run in `dotty-language-server`).dependsOn(configureIDE).toTask("").value
   )
 
   // Only available in vscode-dotty
@@ -882,7 +882,7 @@ object Build {
 
 
       sbtPlugin := true,
-      version := "0.1.1",
+      version := "0.1.2-SNAPSHOT",
       ScriptedPlugin.scriptedSettings,
       ScriptedPlugin.sbtTestDirectory := baseDirectory.value / "sbt-test",
       ScriptedPlugin.scriptedBufferLog := false,

sbt-dotty/src/dotty/tools/sbtplugin/DottyIDEPlugin.scala

@@ -44,12 +44,11 @@ object DottyIDEPlugin extends AutoPlugin {
   }
 
   private val projectConfig = taskKey[Option[ProjectConfig]]("")
-  private val configureIDE = taskKey[Unit]("Generate IDE config files")
   private val compileForIDE = taskKey[Unit]("Compile all projects supported by the IDE")
   private val runCode = taskKey[Unit]("")
 
   object autoImport {
-    val prepareIDE = taskKey[Unit]("Prepare for IDE launch")
+    val configureIDE = taskKey[Unit]("Generate IDE config files")
     val launchIDE = taskKey[Unit]("Run Visual Studio Code on this project")
   }
 
@@ -64,6 +63,11 @@ object DottyIDEPlugin extends AutoPlugin {
     Def.derive(projectConfig := {
       if (sources.value.isEmpty) None
       else {
+        // Not needed to generate the config, but this guarantees that the
+        // generated config is usable by an IDE without any extra compilation
+        // step.
+        val _ = compile.value
+
         val id = s"${thisProject.value.id}/${configuration.value.name}"
         val compilerVersion = scalaVersion.value
           .replace("-nonbootstrapped", "") // The language server is only published bootstrapped
@@ -135,11 +139,6 @@ object DottyIDEPlugin extends AutoPlugin {
         .start()
     },
 
-    prepareIDE := {
-      val x1 = configureIDE.value
-      val x2 = compileForIDE.value
-    },
-
-    launchIDE := runCode.dependsOn(prepareIDE).value
+    launchIDE := runCode.dependsOn(configureIDE).value
   )
 }