[SPARK-7977] [BUILD] Disallowing println

Author: Jonathan Alter <jonalter@users.noreply.github.com>

Closes #7093 from jonalter/SPARK-7977 and squashes the following commits:

ccd44cc [Jonathan Alter] Changed println to log in ThreadingSuite
7fcac3e [Jonathan Alter] Reverting to println in ThreadingSuite
10724b6 [Jonathan Alter] Changing some printlns to logs in tests
eeec1e7 [Jonathan Alter] Merge branch 'master' of github.com:apache/spark into SPARK-7977
0b1dcb4 [Jonathan Alter] More println cleanup
aedaf80 [Jonathan Alter] Merge branch 'master' of github.com:apache/spark into SPARK-7977
925fd98 [Jonathan Alter] Merge branch 'master' of github.com:apache/spark into SPARK-7977
0c16fa3 [Jonathan Alter] Replacing some printlns with logs
45c7e05 [Jonathan Alter] Merge branch 'master' of github.com:apache/spark into SPARK-7977
5c8e283 [Jonathan Alter] Allowing println in audit-release examples
5b50da1 [Jonathan Alter] Allowing printlns in example files
ca4b477 [Jonathan Alter] Merge branch 'master' of github.com:apache/spark into SPARK-7977
83ab635 [Jonathan Alter] Fixing new printlns
54b131f [Jonathan Alter] Merge branch 'master' of github.com:apache/spark into SPARK-7977
1cd8a81 [Jonathan Alter] Removing some unnecessary comments and printlns
b837c3a [Jonathan Alter] Disallowing println

3 files changed, 8 insertions, 0 deletions

diff --git a/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkILoop.scala b/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkILoop.scala
index 7a5e94da5c..3c90287249 100644
--- a/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkILoop.scala
+++ b/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkILoop.scala
@@ -943,7 +943,9 @@ object SparkILoop {
             val s = super.readLine()
             // helping out by printing the line being interpreted.
             if (s != null)
+              // scalastyle:off println
               output.println(s)
+              // scalastyle:on println
             s
           }
         }
diff --git a/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkIMain.scala b/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkIMain.scala
index 1cb910f376..56c009a4e3 100644
--- a/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkIMain.scala
+++ b/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkIMain.scala
@@ -129,7 +129,9 @@ class SparkIMain(@BeanProperty val factory: ScriptEngineFactory, initialSettings
   }
   private def tquoted(s: String) = "\"\"\"" + s + "\"\"\""
   private val logScope = scala.sys.props contains "scala.repl.scope"
+  // scalastyle:off println
   private def scopelog(msg: String) = if (logScope) Console.err.println(msg)
+  // scalastyle:on println
 
   // argument is a thunk to execute after init is done
   def initialize(postInitSignal: => Unit) {
@@ -1297,8 +1299,10 @@ class SparkISettings(intp: SparkIMain) {
   def deprecation_=(x: Boolean) = {
     val old = intp.settings.deprecation.value
     intp.settings.deprecation.value = x
+    // scalastyle:off println
     if (!old && x) println("Enabled -deprecation output.")
     else if (old && !x) println("Disabled -deprecation output.")
+    // scalastyle:on println
   }
   def deprecation: Boolean = intp.settings.deprecation.value
 
diff --git a/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkReplReporter.scala b/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkReplReporter.scala
index 0711ed4871..272f81eca9 100644
--- a/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkReplReporter.scala
+++ b/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkReplReporter.scala
@@ -42,7 +42,9 @@ class SparkReplReporter(intp: SparkIMain) extends ConsoleReporter(intp.settings,
       }
       else super.printMessage(msg)
     }
+    // scalastyle:off println
     else Console.println("[init] " + msg)
+    // scalastyle:on println
   }
 
   override def displayPrompt() {