Split a 'normal' (non-unified) patch file with multiple files into separate small patches

split-normal-diff.sh

#!/bin/sh

SPLITLINE="diff -r orig/"
[ -n "$1" ] && SPLITLINE="$1"

FILE=
SPLITLEN=`echo $SPLITLINE | wc -c`

while read LINE; do
	if echo $LINE | grep "^$SPLITLINE" > /dev/null; then
		FILE="`echo \"$LINE\" | tail -c +$SPLITLEN | sed 's@ .*@@'`"
		FILE="$FILE.patch"
		echo "Saving to file $FILE"
	else
		echo "$LINE" >> "$FILE"
	fi
done

echo "Now execute:"
cat <<EOF
find -name '*.patch' -exec sh -c 'echo {} | sed "s@\(.*\)[.]patch@\1 \1.patch@" | xargs patch -n' \;
EOF