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#!@@SH@@
#
# opkbuild
# src/ob-genchanges.sh
# Generates a changes file to describe binary packages and their changes.
#
# Copyright (C) 2013 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 2 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/>.

. '@@PKGLIBDIR@@/load.sm'

ob_use locale
ob_use output
ob_use package

main()
{
	ob_set_text_domain 'opkbuild'

	ob_init_package '..' || exit 1
	ob_parse_package_metadata -c '.opkbuild.cache' || exit 1

	if [ -n "${OB_DO_SOURCE}" ]; then
		changes="${OPK_SOURCE}_${OPK_SOURCE_VERSION}_src_all.changes"
		ob_info "$(ob_get_msg 'gen_changes')" "${changes}"
		exec 3>"../../${changes}"
		write_changes "${OPK_SOURCE_VERSION}" 'src' 'all'
		write_files_src
		exec 3>&-
	else
		changes="${OPK_SOURCE}_${OPK_SOURCE_VERSION}"
		changes="${changes}_${OPK_HOST_ARCH}_${OPK_HOST_PLAT}.changes"
		ob_info "$(ob_get_msg 'gen_changes')" "${changes}"
		exec 3>"../../${changes}"
		write_changes "${OPK_BINARY_VERSION}" \
			"${OPK_HOST_ARCH}" "${OPK_HOST_PLAT}"
		write_files_bin
		exec 3>&-
	fi
}

write_changes()
{
	version="${1}"
	arch="${2}"
	plat="${3}"

	printf 'Format: 1.0\n' >&3

	printf 'Source: %s\n' "${OPK_SOURCE}" >&3
	printf 'Binary: %s\n' "$(ob_get_binary_packages)" >&3
	printf 'Version: %s\n' "${version}" >&3
	printf 'Architecture: %s\n' "${arch}" >&3
	printf 'Platform: %s\n' "${plat}" >&3

	printf 'Distribution: %s\n' \
		"$(ob_get_source_parameter 'Distribution')" >&3
	printf 'Maintainer: %s\n' "$(ob_get_source_parameter 'Maintainer' | \
		tr '\n' ' ')" >&3
	printf 'Changed-By: %s\n' "$(ob_get_source_parameter 'Uploader')" >&3
	printf 'Date: %s\n' "$(ob_get_source_parameter 'Date')" >&3

	printf 'Description:\n' >&3
	for pkg in $(ob_get_binary_packages); do
		ob_set_package_substvars "${pkg}"
		desc="$(ob_get_binary_parameter "${pkg}" 'Description' | \
			head -n 1)"
		desc="$(ob_substvars "${desc}")"
		printf ' %s - %s\n' "${pkg}" "${desc}" >&3
	done

	printf 'Changes:\n%s\n' "$(ob_get_source_parameter 'Changes' | \
		sed 's/^$/./; s/^/ /;')" >&3
}

write_files_src()
{
	printf 'Files:\n' >&3
	file="src-${OPK_SOURCE}_${OPK_SOURCE_VERSION}_src_all.opk"
	printf ' %s %s %s\n' \
		"$(wc -c "../../${file}" | cut -d ' ' -f 1)" \
		'base' "${file}" >&3
}

write_files_bin()
{
	printf 'Files:\n' >&3
	for pkg in ${OPK_PACKAGES_REDUCED}; do
		arch="$(ob_get_binary_parameter "${pkg}" 'Architecture')"
		[ "${arch}" != 'all' ] && arch="${OPK_HOST_ARCH}"
		plat="$(ob_get_binary_parameter "${pkg}" 'Platform')"
		[ "${plat}" != 'all' ] && plat="${OPK_HOST_PLAT}"
		file="${pkg}_${version}_${arch}_${plat}.opk"
		printf ' %s %s %s\n' \
			"$(wc -c "../../${file}" | cut -d ' ' -f 1)" \
			'base' "${file}" >&3
	done
}

main "${@}"