#!/bin/bash
# Copyright (c) 2017 Icinga Development Team <info@icinga.com>
# Licensed as GPL-2.0+

set -e

while getopts ":p:U:b:" opt
do
    case "$opt" in
    p)
        PROJECT="$OPTARG"
        ;;
    U)
        UPSTREAM_GIT_URL="$OPTARG"
        ;;
    b)
        UPSTREAM_GIT_BRANCH="$OPTARG"
        ;;
    \?)
        echo "Unknown argument: $OPTARG" >&2
        exit 1
        ;;
    esac
done

: ${PROJECT:=icinga2}
: ${UPSTREAM_GIT_URL:=https://github.com/Icinga/$PROJECT.git}
: ${UPSTREAM_GIT_BRANCH:=master}

workdir=`pwd`

set -x

if [ -d "${PROJECT}.git/" ]; then
    cd "${PROJECT}.git"
    if [ ! -d .git ]; then
        echo "This is not a GIT repository: $(pwd)" >&2
        exit 1
    fi
    if [ "$(git config remote.origin.url)" != "${UPSTREAM_GIT_URL}" ]; then
        git remote set-url origin "${UPSTREAM_GIT_URL}"
    fi
     git fetch origin -p
    git checkout -f "${UPSTREAM_GIT_BRANCH}"
    git reset --hard "origin/${UPSTREAM_GIT_BRANCH}"
    git clean -fdx
else
    git clone -b "${UPSTREAM_GIT_BRANCH}" "${UPSTREAM_GIT_URL}" "${PROJECT}.git/"
    cd "${PROJECT}.git"
fi

git_version=$(git describe --tags HEAD)
package_version=$(echo "$git_version" | sed -e 's/^v//' -e 's/-/./g')
tarball="${workdir}/${PROJECT}-${package_version}.tar"

git archive --format=tar --prefix="${PROJECT}-${package_version}/" -o "${tarball}" HEAD

# creating version file for tarball
mkdir "${PROJECT}-${package_version}"
echo "#define VERSION \"$git_version\"" > "${PROJECT}-${package_version}/"icinga-version.h.force
tar --append -f "${tarball}" "${PROJECT}-${package_version}/"*
rm -rf "${PROJECT}-${package_version}"

# pack tarball
gzip -vf9 "${tarball}"
sha256sum "${tarball}.gz"

# store package version for build scripts
echo -e "${package_version}\t$(git rev-parse HEAD)\t$(basename "${tarball}.gz")\t${UPSTREAM_GIT_BRANCH}" > "${workdir}/${PROJECT}.version"