tools/check-whitespace.sh: check for trailing whitespaces

File types that we don't format automatically can end up
with such basic untidiness as trailing whitespaces.
Check for these. Remove all existing precedents.

1 files changed, 31 insertions, 0 deletions

diff --git a/tools/check-whitespace.sh b/tools/check-whitespace.sh
new file mode 100755
index 000000000..a23196601
--- /dev/null
+++ b/tools/check-whitespace.sh
@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+# Copyright 2020 syzkaller project authors. All rights reserved.
+# Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+FILES=0
+FAILED=""
+RE="[[:space:]]$"
+LAST_EMPTY=""
+for F in $(find . -name "*.sh" -o -name "*.S" -o -name "*.py" -o -name "*.yml" -o -name "*.yaml" -o -name "*.md" | \
+		egrep -v "/vendor/|/gen/"); do
+	((FILES+=1))
+	L=0
+	while IFS= read -r LINE; do
+		((L+=1))
+		if [[ $LINE =~ $RE ]]; then
+			echo "$F:$L:1: Trailing whitespace at the end of the line. Please remove."
+			echo "$LINE"
+			FAILED="1"
+		fi
+		LAST_EMPTY=""
+		if [ "$LINE" == "" ]; then
+			LAST_EMPTY="1"
+		fi
+	done < "$F"
+	if [ "$LAST_EMPTY" != "" ]; then
+		echo "$F:$L:1: Trailing empty line at the end of the file. Please remove."
+		FAILED="1"
+	fi
+done
+if [ "$FAILED" != "" ]; then exit 1; fi
+echo "$FILES files checked for whitespaces"