check_format.sh: enforce newline at end of file

Change-Id: I4fd1338ec3d95ffcd8a0727e87b845399676ccfa
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>

scripts/check_format.sh

@@ -30,4 +30,7 @@ else
 	exit 0
 fi
 
+git ls-files -z '*.c' '*.cpp' '*.h' '*.txt' '*.md' '*.mk' '*.txt' '*.sh' '*.py' | \
+	xargs -0 -P8 -n1 scripts/eofnl
+
 exit 0

scripts/eofnl

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# Make sure file has a trailing newline
+
+f="$1"
+
+if [ -z "$f" ]; then
+	echo "usage: $0 <file>"
+	exit 1
+fi
+
+if [[ -f "$f" && $(tail -c1 "$f") ]]; then
+	echo "$f: No newline at end of file"
+	echo '' >> "$f"
+	exit 1
+else
+	exit 0
+fi