#!/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}

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')
prefix="${PROJECT}-${package_version}"
tarball="${prefix}.orig.tar"

git archive --format=tar --prefix="${prefix}/" -o "../${tarball}" "${UPSTREAM_GIT_BRANCH}"

cd ../

# create files with the properly set versions for snapshot
rm -rf "${prefix:?}/"

mkdir -p "${prefix}"/library/Icinga/Application
sed -e "s~const VERSION.*~const VERSION = '${package_version}';~" \
    "${PROJECT}.git"/library/Icinga/Application/Version.php \
    > "${prefix}"/library/Icinga/Application/Version.php

for module in $(cd "${PROJECT}.git/modules"; ls); do
    test -e "${PROJECT}.git/modules/${module}/module.info" || continue
    mkdir -p "${prefix}/modules/${module}"
    sed -e "s~^Version:.*~Version: ${package_version}~" \
        "${PROJECT}.git/modules/${module}/module.info" \
        > "${prefix}/modules/${module}/module.info"
done

# add to tarball and remove tmpdir
tar --append -f "${tarball}" "${prefix}"/
rm -rf "${prefix:?}/"

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

# store package version for build scripts
printf '%s\t%s\t%s\t%s' \
  "${package_version}" \
  "$(git rev-parse "${UPSTREAM_GIT_BRANCH}")" \
  "$(basename "${tarball}.gz")" \
  "${UPSTREAM_GIT_BRANCH}" \
  > "${PROJECT}.version"