#!/usr/bin/env bash
set -e

show_help()
{
    echo -e "`basename $0`  [option] [argument]"
    echo
    echo -e "Options:"
    echo -e "  -h    show this help."
    echo -e "  -v    with argument version (3.0.0 by default)."
    echo -e "  -f    with argument format (tar.xz by default) used by git archive."
    echo
    echo -e "Examples:"
    echo -e "  to build base on version \`2.4.1' with format \`tar.xz', run:"
    echo -e "    `basename $0` -f tar.xz -v 2.4.1"
}

while getopts "hv:f:" opt
do
    case ${opt} in
        h)
            show_help
            exit 0
            ;;
        v)
            if [ "${OPTARG}" = v* ]; then
                version=${OPTARG#"v"}
            else
                version=${OPTARG}
            fi
            ;;
        f)
            format=${OPTARG}
            ;;
        *)
            exit 1
            ;;
    esac
done

: ${version:=3.0.0}
: ${format:=tar.gz}

name="shadowsocks-libev"
spec_name="shadowsocks-libev.spec"

pushd `git rev-parse --show-toplevel`
git archive "v${version}" --format="${format}" --prefix="${name}-${version}/" -o rpm/SOURCES/"${name}-${version}.${format}"
pushd rpm

sed -e "s/^\(Version:	\).*$/\1${version}/" \
    -e "s/^\(Source0:	\).*$/\1${name}-${version}.${format}/" \
    SPECS/"${spec_name}".in > SPECS/"${spec_name}"

rpmbuild -bb SPECS/"${spec_name}" --define "%_topdir `pwd`"