Reducing the ouput of run-tests script.

.gitignore

@@ -47,3 +47,4 @@ spark-*-bin.tar.gz
 unit-tests.log
 /lib/
 rat-results.txt
+scalastyle.txt

dev/run-tests

@@ -39,18 +39,17 @@ JAVA_VERSION=$($java_cmd -version 2>&1 | sed 's/java version "\(.*\)\.\(.*\)\..*
 echo "========================================================================="
 echo "Running Apache RAT checks"
 echo "========================================================================="
-
 dev/check-license
 
 echo "========================================================================="
 echo "Running Scala style checks"
 echo "========================================================================="
-sbt/sbt clean scalastyle
+dev/scalastyle
 
 echo "========================================================================="
 echo "Running Spark unit tests"
 echo "========================================================================="
-sbt/sbt assembly test
+sbt/sbt assembly test | grep -v "info.*Resolving"
 
 echo "========================================================================="
 echo "Running PySpark tests"

dev/scalastyle

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+sbt/sbt clean scalastyle > scalastyle.txt
+ERRORS=$(cat scalastyle.txt | grep -e "error file")
+if test ! -z "$ERRORS"; then
+    echo -e "Scalastyle checks failed at following occurrences:\n$ERRORS"
+    exit 1
+else
+    echo -e "Scalastyle checks passed.\n"
+fi