additional warning when ignoring project load failure

main/Main.scala

@@ -354,7 +354,11 @@ object BuiltinCommands
 		else if(matches(Quit))
 			s.exit(ok = false)
 		else if(matches("ignore"))
+		{
+			val hadPrevious = Project.isProjectLoaded(s)
+			logger(s).warn("Ignoring load failure: " + (if(hadPrevious) "using previously loaded project." else "no project loaded."))
 			s
+		}
 		else
 		{
 			println("Invalid response.")

main/Project.scala

@@ -129,6 +129,7 @@ object Project extends Init[Scope] with ProjectExtra
 	def getOrError[T](state: State, key: AttributeKey[T], msg: String): T = state get key getOrElse error(msg)
 	def structure(state: State): BuildStructure = getOrError(state, stateBuildStructure, "No build loaded.")
 	def session(state: State): SessionSettings = getOrError(state, sessionSettings, "Session not initialized.")
+	def isProjectLoaded(state: State): Boolean = (state has sessionSettings) && (state has stateBuildStructure)
 
 	def extract(state: State): Extracted  =  extract( session(state), structure(state) )
 	def extract(se: SessionSettings, st: BuildStructure): Extracted  =  Extracted(st, se, se.current)

main/State.scala

@@ -40,6 +40,7 @@ trait StateOps {
 	def get[T](key: AttributeKey[T]): Option[T]
 	def put[T](key: AttributeKey[T], value: T): State
 	def remove(key: AttributeKey[_]): State
+	def has(key: AttributeKey[_]): Boolean
 	def baseDir: File
 	def locked[T](file: File)(t: => T): T
 	def runExitHooks(): State
@@ -72,6 +73,7 @@ object State
 		def exit(ok: Boolean) = setResult(Some(Exit(if(ok) 0 else 1)))
 		def get[T](key: AttributeKey[T]) = s.attributes get key
 		def put[T](key: AttributeKey[T], value: T) = s.copy(attributes = s.attributes.put(key, value))
+		def has(key: AttributeKey[_]) = s.attributes contains key
 		def remove(key: AttributeKey[_]) = s.copy(attributes = s.attributes remove key)
 		def fail =
 		{