Add cleanup Patches function to not modify patches with no changes

rebuildPatches.sh

@@ -2,14 +2,24 @@
 
 basedir=$(dirname $(readlink -f $0))
 echo "Rebuilding patch files from current fork state..."
-
+function cleanupPatches {
+    cd $1
+    for patch in *.patch; do
+        lines=$(git diff --staged $patch | grep -E "^(\+|\-)" | grep -Ev "(From [a-z0-9]{32,}|--- a|+++ b)" | wc -l)
+        if [ "$lines" == "0" ] ; then
+            git reset HEAD $patch >/dev/null
+            git checkout -- $patch >/dev/null
+        fi
+    done
+}
 function savePatches {
     what=$1
     target=$2
     cd $basedir/$target/
-    git format-patch -o $basedir/${what}-Patches/ upstream/master
+    git format-patch -N -o $basedir/${what}-Patches/ upstream/master
     cd $basedir
     git add $basedir/${what}-Patches
+    cleanupPatches $basedir/${what}-Patches
     echo "  Patches saved for $what to $what-Patches/"
 }