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#!/bin/env bash

if [ -n "$debug" ] ; then
set -x
fi

BIN_DIR=$(dirname "$0")
CORE_DIR=$(realpath "$BIN_DIR/..")
GEN_BZ2=false
GEN_MD5=false
GEN_XZ=false
OUT_DIR="${CORE_DIR?}"
VERSION=

usage()
{
cat <<EOF
Usage: $0 [ --xz ] [ --bz2 ] [ --md5 ] [ --output-dir=<output location> ]
          [ --core-dir=<core-repo-location ] [--version=<package_version] label

    --xz         generate a package compressed with xz (default)
    --bz2        generate a package compressed with bz2. Note if you specify
                 both --cz and --bz2, both are created. if you specify neither
                 --xz is impliied.
    --md5        generate a md5 signature for the generated pacakge(s)
    --output-dir where to put the generated packages
    --core-dir   location of the core repo to extract sources from.
                 by default this is one directory up from the position
                 of this script.
    --version    version string used to generate the name of the pacakge
                 the source pacakge name is libreoffice-<version>.tar.[bz2|xz]

EOF
}
while [ "${1}" != "" ]; do
    parm=${1%%=*}
    arg=${1#*=}
    has_arg=
    if [ "${1}" != "${parm?}" ] ; then
	has_arg=1
    else
	arg=""
    fi
#    echo "parm=!${parm}!"
#    echo "arg=!${arg}!"
    case "${parm}" in
        -2|--bz2)
	    GEN_BZ2=true
	    ;;
	-x|--xz)
	    GEN_XZ=true
	    ;;
	-5|--md5)
	    GEN_MD5=true
	    ;;
	-o|--output-dir)
	    if [ -z "${has_arg}" ] ; then
		shift;
		arg="$1"
	    fi
	    if [ -z "${arg}" ] ; then
		echo "Missing argument for option $parm" 1>&2
		exit -1
	    else
		OUT_DIR="$arg"
	    fi
	    ;;
	-v|--version)
	    if [ -z "${has_arg}" ] ; then
		shift;
		arg="$1"
	    fi
	    if [ -z "${arg}" ] ; then
		echo "Missing argument for option $parm" 1>&2
		exit -1
	    else
		VERSION="$arg"
	    fi
	    ;;
	-h|--help)
	    usage
	    exit 0
	    ;;
        -*)
	    echo "Invalid option $1" 1>&2
	    exit -1
	    ;;
	*)
	    if [ -z "${LABEL}" ] ; then
		LABEL="$parm"
	    else
		echo "Too many arguments..  $@" 1>&2
		exit -1
	    fi
	    ;;
    esac
    shift
done

# we need a label
if [ -z "${LABEL}" ] ; then
    echo "Missing argument. we need a git label as source" 1>&2
    exit 1
fi

# default to xz compression
if ! ${GEN_BZ2?} && ! ${GEN_XZ?} ; then
    GEN_XZ=true
fi

# --version= is mandatory
if [ -z "${VERSION}" ] ; then
    VERSION="${LABEL?}"
fi

base_name="libreoffice-${VERSION}"

# --output-dir default to core-dir
if [ -z "${OUT_DIR}" ] ; then
    OUT_DIR="$CORE_DIR?}"
fi

if [ ! -d "${CORE_DIR?}" ] ; then
    echo "Core repo directory $CORE_DIR does not exist or is not a directory" 1>&2
    exit 1
fi

if [ ! -d "${CORE_DIR?}/.git" ] ; then
    echo "Core repo $CORE_DIR is not a git repo" 1>&2
    exit 1
fi

if [ ! -d "${OUT_DIR?}" ] ; then
    echo "Output directory $OUT_DIR does not exist or is not a directory" 1>&2
    exit 1
fi


pushd "${CORE_DIR}" > /dev/null


echo "archiving core..."
git archive --format=tar --prefix="${base_name?}" -o "${OUT_DIR}/${base_name}.tar" ${LABEL?}


concatenate_list=
for module in dictionaries helcontent2 translations ; do
    if [ ! -f ${module?}/.git ] ; then
	echo "Warning: module $module is not present" 1>&2
    else
	echo "archiving ${module?}..."
	git archive --format=tar --prefix="${base_name?}/${module?}" -o "${OUT_DIR}/${base_name}-${module?}.tar" ${LABEL?}
	concatenate_list="${concatenate_list?} ${OUT_DIR}/${base_name}-${module?}.tar"
    fi
done

if [ -n "${concatenate_list?}" ] ; then
    tar --concatenate --file="${OUT_DIR}/${base_name}.tar" ${concatenate_list?}
    rm ${concatenate_list?}
fi

if ${GEN_BZ2?} ; then
    echo "bzip2 compression..."
    bzip2 -fkz "${OUT_DIR}/${base_name}.tar"
    if ${GEN_MD5?} ; then
	echo "md5sum..."
	md5sum "${OUT_DIR}/${base_name}.tar.bz2" > "${OUT_DIR}/${base_name}.tar.bz2.md5"
    fi
fi

if ${GEN_XZ?} ; then
    echo "xz compression..."
    xz -fz "${OUT_DIR}/${base_name}.tar"
    if ${GEN_MD5?} ; then
	echo "md5sum..."
	md5sum "${OUT_DIR}/${base_name}.tar.xz" > "${OUT_DIR}/${base_name}.tar.zx.md5"
    fi
else
    rm "${OUT_DIR}/${base_name}.tar"
fi

echo "Done."