From 8fa44ee11730ae73d38e10c6f291e3b1459495ae Mon Sep 17 00:00:00 2001
From: Oleg Hahm <oleg@hobbykeller.org>
Date: Wed, 18 Feb 2015 16:12:17 +0100
Subject: [PATCH 1/2] dist/tools: check for whitespace errors

---
 dist/tools/whitespacecheck/check.sh | 37 +++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100755 dist/tools/whitespacecheck/check.sh

diff --git a/dist/tools/whitespacecheck/check.sh b/dist/tools/whitespacecheck/check.sh
new file mode 100755
index 0000000000..4b31f9e97f
--- /dev/null
+++ b/dist/tools/whitespacecheck/check.sh
@@ -0,0 +1,37 @@
+#!/bin/sh
+
+# Copyright 2015 Oliver Hahm <oliver.hahm@inria.fr>
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
+# If no branch but an option is given, unset BRANCH.
+# Otherwise, consume this parameter.
+BRANCH="${1}"
+if echo "${BRANCH}" | grep -q '^-'; then
+    if [ $(git rev-parse --abbrev-ref HEAD) != "master" ]; then
+        BRANCH="master"
+    else
+        BRANCH=""
+    fi
+else
+    if [ -n "${BRANCH}" ]; then
+        shift 1
+    fi
+fi
+
+
+# select files to check
+if [ -z "${BRANCH}" ]; then
+    BRANCH=$(git rev-list HEAD | tail -n 1)
+fi
+
+git diff --check $(git merge-base ${BRANCH} HEAD) > /dev/null
+if [ $? -gt 0 ]
+then
+    echo "ERROR: This change introduces new whitespace errors"
+    exit 1
+else
+    exit 0
+fi

From 05fc8493d34f6993c476ed1953502e9225201337 Mon Sep 17 00:00:00 2001
From: Oleg Hahm <oleg@hobbykeller.org>
Date: Wed, 18 Feb 2015 16:37:30 +0100
Subject: [PATCH 2/2] travis: added whitespace error to travis config

---
 .travis.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 98721225ff..4fa9f0b95a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -44,6 +44,8 @@ script:
     - make -s -C ./examples/default info-concurrency
     - git rebase riot/master || git rebase --abort
 
+    - ./dist/tools/whitespacecheck/check.sh master || exit
+
     - ./dist/tools/licenses/check.sh master --diff-filter=MR --error-exitcode=0 || exit
     - ./dist/tools/licenses/check.sh master --diff-filter=AC || exit