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#!@@SHELL@@
#
# opkhelper
# src/oh-unpacksource
# Unpack native or upstream source.
#
# Copyright (C) 2012 Patrick "P. J." McDermott
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

. @@LIBDIR@@/messages
. @@LIBDIR@@/locale

# Global parameters:
UPSTREAM_ARCHIVE_BASE=
UPSTREAM_ARCHIVE=
UPSTREAM_ARCHIVE_Z=
UPSTREAM_ARCHIVE_DIR=

main()
{
	oh_locale_set
	oh_set_source_dir ..

	if [ "${#}" -ne 0 ]; then
		oh_usage
		exit 1
	fi

	if [ -d ../src ]; then
		unpack_native
	else
		unpack_upstream
	fi
}

unpack_native()
{
	oh_info "${oh_str_unpacking_native}"
	cp -Rp ../src src || oh_error "${oh_str_cant_unpack_native}"
}

unpack_upstream()
{
	get_upstream_archive
	get_upstream_compression
	get_upstream_dir
	extract_upstream
}

get_upstream_archive()
{
	UPSTREAM_ARCHIVE_BASE="${OH_SOURCE}-${OH_SOURCE_VERSION_UPSTREAM}.orig.tar."
	UPSTREAM_ARCHIVE=$(find .. -name "${UPSTREAM_ARCHIVE_BASE}*")
	case "$(echo "${UPSTREAM_ARCHIVE}" | grep -v '^$' | wc -l)" in
		0)
			oh_error "${oh_str_no_sources}"
			;;
		1)
			;;
		*)
			oh_error "${oh_str_multiple_upstream_sources}"
			;;
	esac
}

get_upstream_compression()
{
	z_ext="${UPSTREAM_ARCHIVE#../${UPSTREAM_ARCHIVE_BASE}}"
	case "${z_ext}" in
		gz)
			UPSTREAM_ARCHIVE_Z=z
			;;
		bz2)
			UPSTREAM_ARCHIVE_Z=j
			;;
		lz)
			UPSTREAM_ARCHIVE_Z=a
			;;
		Z)
			UPSTREAM_ARCHIVE_Z=Z
			;;
		*)
			oh_error "${oh_str_unsupported_archive_compression}" "${z_ext}"
			;;
	esac
}

get_upstream_dir()
{
	UPSTREAM_ARCHIVE_DIR=$(tar "-t${UPSTREAM_ARCHIVE_Z}f" \
		"${UPSTREAM_ARCHIVE}" | sed -n 's@^\./\([^/]*\)$@\1@p')
	case "$(echo "${UPSTREAM_ARCHIVE_DIR}" | grep -v '^$' | wc -l)" in
		0)
			oh_error "${oh_str_no_upstream_dirs}"
			;;
		1)
			;;
		*)
			oh_error "${oh_str_multiple_top_upstream_dirs}"
	esac
}

extract_upstream()
{
	oh_info "${oh_str_unpacking_upstream}"
	tar "-x${UPSTREAM_ARCHIVE_Z}f" "${UPSTREAM_ARCHIVE}" || \
		oh_error "${oh_str_cant_unpack_upstream}"
	mv "${UPSTREAM_ARCHIVE_DIR}" src || oh_error "${oh_str_cant_move_native}"
}

main "${@}"