#!/bin/bash

if [ $# -ne 2 ] ; then

    echo "Usage:"

    echo "   $0 <git-dir> <base-tag>"

    exit 1

fi

git_dir="$1"

base_tag="$2"

target_dir="$(pwd)"

pushd "$git_dir" >/dev/null

git format-patch -k -o "$target_dir" "$base_tag" >/dev/null

popd >/dev/null

echo "# Patches exported from source git"

i=1

for p in *.patch ; do

    printf "# "

    sed '/^Subject:/{s/^Subject: //;p};d' "$p"

    printf "Patch%s: %s\n" $i "$p"

    i=$(($i + 1))

done