From 245c8a538128c20e6b775d1545016e151707259f Mon Sep 17 00:00:00 2001
From: Jakob Odersky <jodersky@gmail.com>
Date: Wed, 14 Oct 2015 18:28:25 -0700
Subject: [PATCH] Add [warn] tag to fatal warnings

---
 project/SparkBuild.scala | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index 1339980c38800..5d561e888a98d 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -160,7 +160,7 @@ object SparkBuild extends PomBuild {
     // Code snippet taken from https://issues.scala-lang.org/browse/SI-8410.
     compile in Compile := {
       val analysis = (compile in Compile).value
-      val s = streams.value
+      val out = streams.value
 
       def logProblem(l: (=> String) => Unit, f: File, p: xsbti.Problem) = {
         l(f.toString + ":" + p.position.line.fold("")(_ + ":") + " " + p.message)
@@ -177,7 +177,14 @@ object SparkBuild extends PomBuild {
             failed = failed + 1
           }
 
-          logProblem(if (deprecation) s.log.warn else s.log.error, k, p)
+          val printer: (=> String) => Unit = s => if (deprecation) {
+            out.log.warn(s)
+          } else {
+            out.log.error("[warn] " + s)
+          }
+
+          logProblem(printer, k, p)
+
         }
       }