#!/bin/bash

die() { echo "Error: $@"; exit 1; }

SINCE="$1"
[[ -z ${SINCE} ]] && die "missing param SINCE"
PATCH_DIR="./patches"

[[ ! -d ${PATCH_DIR} ]] && install -d ${PATCH_DIR}

commit_list=( $(git log --since "${SINCE}" -p --reverse | grep '^commit' | sed 's:commit\ \(.*\):\1:') )

count="${#commit_list[*]}"
for (( i=0; i<count;i++))
do
	git show "${commit_list[${i}]}" > ${PATCH_DIR}/"${i}-${commit_list[$i]}.patch"
done