Add a script to check whether all project sources are properly formatted

tools/check-formatting.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+source $(dirname $0)/env.sh
+
+cd $LUNA_ROOT
+
+SOURCES=($(find kernel/src -type f | grep "\.c") $(find kernel/include -type f))
+SOURCES+=($(find libs/libc/src -type f | grep "\.c") $(find libs/libc/include -type f))
+SOURCES+=($(find apps/src -type f))
+
+ALL_OK=1
+
+for f in ${SOURCES[@]}
+do
+    clang-format -n $f 2>&1 | grep ".*" >/dev/null
+    if [ "$?" = "0" ]
+    then
+        echo "File $f needs formatting"
+        ALL_OK=0
+    fi
+done
+
+if [ $ALL_OK = "1" ]
+then
+    echo "All files OK"
+    exit 0
+fi
+
+exit 1