on-load message customizable, more specific message for plugin projects

main/Defaults.scala

@@ -108,6 +108,7 @@ object Defaults extends BuildCommon
 	def projectCore: Seq[Setting[_]] = Seq(
 		name <<= thisProject(_.id),
 		logManager <<= extraLoggers(LogManager.defaults),
+		onLoadMessage <<= onLoadMessage or (name, thisProjectRef)("Set current project to " + _ + " (in build " + _.build +")"),
 		runnerTask
 	)
 	def paths = Seq(

main/GlobalPlugin.scala

@@ -57,6 +57,7 @@ object GlobalPlugin
 	private[this] def log(s: State) = CommandSupport.logger(s)
 	val globalPluginSettings = inScope(Scope.GlobalScope in LocalRootProject)(Seq(
 		organization := "org.scala-tools.sbt",
+		onLoadMessage <<= Keys.baseDirectory("Loading global plugins from " + _),
 		name := "global-plugin",
 		sbtPlugin := true,
 		version := "0.0"

main/Keys.scala

@@ -46,6 +46,7 @@ object Keys
 	val initialize = SettingKey[Unit]("initialize", "A convenience setting for performing side-effects during initialization.")
 	val onLoad = SettingKey[State => State]("on-load", "Transformation to apply to the build state when the build is loaded.")
 	val onUnload = SettingKey[State => State]("on-unload", "Transformation to apply to the build state when the build is unloaded.")
+	val onLoadMessage = SettingKey[String]("on-load-message", "Message to display when the project is loaded.")
 
 	val onComplete = SettingKey[() => Unit]("on-complete", "Hook to run when task evaluation completes.  The type of this setting is subject to change, pending the resolution of SI-2915.")
 // https://issues.scala-lang.org/browse/SI-2915

main/Load.scala

@@ -403,8 +403,12 @@ object Load
 			case Some(cp) => cp.data.fullClasspath
 			case None => Nil
 		}
+	val autoPluginSettings: Seq[Setting[_]] = inScope(GlobalScope in LocalRootProject)(Seq(
+		Keys.sbtPlugin :== true,
+		Keys.onLoadMessage <<= Keys.baseDirectory("Loading project definition from " + _)
+	))
 	def enableSbtPlugin(config: LoadBuildConfiguration): LoadBuildConfiguration =
-		config.copy(injectSettings = config.injectSettings.copy(global = (Keys.sbtPlugin in Global in LocalRootProject :== true) +: config.injectSettings.global))
+		config.copy(injectSettings = config.injectSettings.copy(global = autoPluginSettings ++ config.injectSettings.global))
 	def activateGlobalPlugin(config: LoadBuildConfiguration): LoadBuildConfiguration =
 		config.globalPlugin match
 		{

main/Project.scala

@@ -172,8 +172,8 @@ object Project extends Init[Scope] with ProjectExtra
 		val structure = Project.structure(s)
 		val ref = Project.current(s)
 		val project = Load.getProject(structure.units, ref.build, ref.project)
-		val label = Keys.name in ref get structure.data getOrElse ref.project
-		logger(s).info("Set current project to " + label + " (in build " + ref.build +")")
+		val msg = Keys.onLoadMessage in ref get structure.data getOrElse ""
+		if(!msg.isEmpty) logger(s).info(msg)
 		def get[T](k: SettingKey[T]): Option[T] = k in ref get structure.data
 		def commandsIn(axis: ResolvedReference) = commands in axis get structure.data toList ;