prefix automatic imports with _root_. Fixes #173.

main/Load.scala

@@ -69,7 +69,7 @@ object Load
 	def buildGlobalSettings(base: File, files: Seq[File], config: LoadBuildConfiguration): ClassLoader => Seq[Setting[_]] =
 	{	
 		val eval = mkEval(data(config.globalPluginClasspath), base, defaultEvalOptions)
-		val imports = baseImports ++ importAll(config.globalPluginNames)
+		val imports = baseImports ++ importAllRoot(config.globalPluginNames)
 		EvaluateConfigurations(eval, files, imports)
 	}
 	def loadGlobal(state: State, base: File, global: File, config: LoadBuildConfiguration): LoadBuildConfiguration =
@@ -497,6 +497,7 @@ object Load
 		ModuleUtilities.getObject(pluginName, loader).asInstanceOf[Plugin].settings
 
 	def importAll(values: Seq[String]) = if(values.isEmpty) Nil else values.map( _ + "._" ).mkString("import ", ", ", "") :: Nil
+	def importAllRoot(values: Seq[String]) = importAll(values.map("_root_." + _))
 		
 	def findPlugins(analysis: inc.Analysis): Seq[String]  =  discover(analysis, "sbt.Plugin")
 	def findDefinitions(analysis: inc.Analysis): Seq[String]  =  discover(analysis, "sbt.Build")
@@ -566,7 +567,7 @@ object Load
 		def imports = getImports(unit)
 		override def toString = unit.toString
 	}
-	def getImports(unit: BuildUnit) = baseImports ++ importAll(unit.plugins.pluginNames ++ unit.definitions.buildNames)
+	def getImports(unit: BuildUnit) = baseImports ++ importAllRoot(unit.plugins.pluginNames ++ unit.definitions.buildNames)
 
 	def referenced[PR <: ProjectReference](definitions: Seq[ProjectDefinition[PR]]): Seq[PR] = definitions flatMap { _.referenced }
 	

sbt/src/sbt-test/project/auto-import/changes/build.sbt

@@ -0,0 +1,3 @@
+maxErrors := xyz
+
+name := "Demo"

sbt/src/sbt-test/project/auto-import/project/P.scala

@@ -0,0 +1,14 @@
+package name.example
+
+import sbt._
+
+object P extends Plugin {
+	val xyz = 3
+	val checkMaxErrors = TaskKey[Unit]("check-max-errors")
+	val checkName = TaskKey[Unit]("check-name")
+
+	override def settings = Seq[Setting[_]](
+		checkMaxErrors <<= Keys.maxErrors map { me => assert(me == xyz, "Expected maxErrors to be " + xyz + ", but it was " + me ) },
+		checkName <<= Keys.name map { n => assert(n == "Demo", "Expected name to be 'Demo', but it was '" + n + "'" ) }
+	)
+}

sbt/src/sbt-test/project/auto-import/test

@@ -0,0 +1,8 @@
+-> check-name
+-> check-max-errors
+
+$ copy-file changes/build.sbt build.sbt
+> reload
+
+> check-name
+> check-max-errors