In initStringCodecs avoid reflect universe initialization

This showed up in profiling. It's known that TypeTags are expensive. Even
more so if the reflect universe is accessed during startup when the
class loading and JIT compiler are busy enough with other stuff.

internal/util-logging/src/main/scala/sbt/util/LogExchange.scala

@@ -67,9 +67,15 @@ sealed abstract class LogExchange {
     import sbt.internal.util.codec.TraceEventShowLines._
     import sbt.internal.util.codec.SuccessEventShowLines._
 
-    registerStringCodec[Throwable]
-    registerStringCodec[TraceEvent]
-    registerStringCodec[SuccessEvent]
+    // Register these StringCodecs manually, because this method will be called at the very startup of sbt
+    // and we'll try not to initialize the universe in StringTypeTag.apply
+    // If these classes are moved around, both the fully qualified names and the strings need to be adapted.
+    // A better long-term solution could be to make StringTypeTag.apply a macro.
+    registerStringCodecByStringTypeTag[_root_.scala.Throwable](StringTypeTag("scala.Throwable"))
+    registerStringCodecByStringTypeTag[_root_.sbt.internal.util.TraceEvent](
+      StringTypeTag("sbt.internal.util.TraceEvent"))
+    registerStringCodecByStringTypeTag[_root_.sbt.internal.util.SuccessEvent](
+      StringTypeTag("sbt.internal.util.SuccessEvent"))
   }
 
   // This is a dummy layout to avoid casting error during PatternLayout.createDefaultLayout()
@@ -102,6 +108,10 @@ sealed abstract class LogExchange {
 
   def registerStringCodec[A: ShowLines: TypeTag]: Unit = {
     val tag = StringTypeTag[A]
+    registerStringCodecByStringTypeTag(tag)
+  }
+
+  private[sbt] def registerStringCodecByStringTypeTag[A: ShowLines](tag: StringTypeTag[A]): Unit = {
     val ev = implicitly[ShowLines[A]]
     val _ = getOrElseUpdateStringCodec(tag.key, ev)
   }