#!/bin/sh

if [ ! -e "$1" ]; then
	echo "usage: $0 target"
	exit 1
fi

if [ ! -e "$1.orig" ]; then
	mv "$1" "$1.orig"
	cp "$1.orig" "$1"
fi
$EDITOR "$1"

PORTDIR=../..

while [ ! -e ${PORTDIR}/work ]; do
	PORTDIR="../${PORTDIR}"
	if echo "$PORTDIR" | grep -qE '.{20}'; then
		echo "Cannot find ../.../work"
		exit 1
	fi
done

mkdir -p ${PORTDIR}/files
filename=`echo "$1" | sed -e 's|^\./||; s|/|-|g; s|^|patch-|'`
diff -u "$1.orig" "$1" | tee ${PORTDIR}/files/"$filename" &&
	echo "Placed to ${PORTDIR}/files/$filename"