1 files changed, 33 insertions, 0 deletions
diff --git a/scripts/check_whitespace.sh b/scripts/check_whitespace.sh
new file mode 100755
index 0000000..a38d4ce
--- /dev/null
+++ b/scripts/check_whitespace.sh
@@ -0,0 +1,33 @@
+# Copyright 2018 Google
+#
+# Licensed 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.
+
+# Fail on an trailing whitespace characters, excluding
+#   * binary files (-I)
+#   * nanopb-generated files
+#
+# Note: specifying revisions we care about makes this go slower than just
+# grepping through the whole repo.
+options=(
+  -n  # show line numbers
+  -I  # exclude binary files
+  ' $'
+)
+
+git grep "${options[@]}" \
+    -- ':(exclude)Firestore/Protos/nanopb'
+if [[ $? == 0 ]]; then
+  echo "ERROR: Trailing whitespace found in the files above. Please fix."
+  exit 1
+fi
+