#!/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:=icingaweb2}
: ${UPSTREAM_GIT_URL:=https://github.com/Icinga/$PROJECT.git}
: ${UPSTREAM_GIT_BRANCH:=master}

workdir=`pwd`

set -x

if [ -z "$UPSTREAM_GIT_NOREPO" ]; then
    if [ -d "${PROJECT}.git/" ]; then
        cd "${PROJECT}.git"
        if [ ! -d .git ]; then
            echo "This is not a GIT repository: $(pwd)" >&2
            exit 1
        fi
        if [ -z "$UPSTREAM_GIT_NOUPDATE" ]; then
            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/${UPSTREAM_GIT_BRANCH}"
        fi
        git clean -fdx
    elif [ -z "$UPSTREAM_GIT_NOUPDATE" ]; then
        git clone -b "${UPSTREAM_GIT_BRANCH}" "${UPSTREAM_GIT_URL}" "${PROJECT}.git/"
        cd "${PROJECT}.git"
    else
        echo "Missing '${PROJECT}.git' directory!" >&2
        exit 1
    fi
fi

git_version=$(git describe --tags "${UPSTREAM_GIT_BRANCH}")
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 "${tarball}" "${UPSTREAM_GIT_BRANCH}"

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

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