#!@@SH@@
#
# opkbuild
# src/opkbuild
# Build opkg packages.
#
# 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/>.

. '@@LIBOPKBUILD@@/load.sm'

ob_use locale
ob_use output
ob_use package
ob_use metadata

opt_build=
opt_target=
opt_host_arch=
opt_host_plat=
opt_check_build_deps=
opt_clean=
opt_uid0_cmd=

main()
{
	ob_set_text_domain 'opkbuild'

	get_options "${@}"
	shift $(($OPTIND - 1))
	if [ ${#} -ne 0 ]; then
		usage
		exit 1
	fi

	test_uid0_cmd

	ob_info "$(ob_get_msg 'setup_arch_plat')"
	setup_arch_plat

	ob_info "$(ob_get_msg 'make_work_area')"
	mkdir -p 'tmp'
	cd 'tmp'

	ob_info "$(ob_get_msg 'parse_package_metadata')"
	ob_init_package '..'
	ob_parse_package_metadata -c '.opkbuild.cache'

	ob_info "$(ob_get_msg 'build_source')"
	build_source

	ob-checkbuilddeps

	pkgs="$(ob_get_binary_packages -a "${OB_HOST_ARCH}")"

	eval "$(ob-buildenv)"

	ob-unpacksource
	ob-applypatches
	ob-installplatconf

	./build build
	${opt_uid0_cmd} ./build install

	ob-installdocs
	ob-gencontrol
	ob-buildopk

	ob-genchanges

	if "${opt_clean}"; then
		cd ..
		rm -Rf 'tmp'
	fi
}

usage()
{
	printf "$(ob_get_msg 'usage')\n" 'opkbuild'
}

help()
{
	usage
	printf '%s\n' "$(ob_get_msg 'help')"
}

version()
{
	printf "$(ob_get_msg 'version')\n" \
		'opkbuild' '@@PACKAGE_NAME@@' '@@PACKAGE_VERSION@@'
}

get_options()
{
	# Parse and handle command-line options.
	while getopts 'bBASFT:a:P:DdCcr:hV' opt; do
		case "${opt}" in
			b)
				if [ -n "${opt_build}" ]; then
					oh_error "${oh_str_bbasf_mutex}"
				fi
				opt_build='binary'
				;;
			B)
				if [ -n "${opt_build}" ]; then
					oh_error "${oh_str_bbasf_mutex}"
				fi
				opt_build='binary-arch'
				;;
			A)
				if [ -n "${opt_build}" ]; then
					oh_error "${oh_str_bbasf_mutex}"
				fi
				opt_build='binary-indep'
				;;
			S)
				if [ -n "${opt_build}" ]; then
					oh_error "${oh_str_bbasf_mutex}"
				fi
				opt_build='source'
				;;
			F)
				if [ -n "${opt_build}" ]; then
					oh_error "${oh_str_bbasf_mutex}"
				fi
				opt_build='full'
				;;
			T)
				opt_target="${OPTARG}"
				;;
			a)
				opt_host_arch="${OPTARG}"
				;;
			P)
				opt_host_plat="${OPTARG}"
				;;
			D)
				opt_check_build_deps='true'
				;;
			d)
				opt_check_build_deps='false'
				;;
			C)
				opt_clean='true'
				;;
			c)
				opt_clean='false'
				;;
			r)
				opt_uid0_cmd="${OPTARG}"
				;;
			h)
				help
				exit 0
				;;
			V)
				version
				exit 0
				;;
			?)
				ob_error "$(ob_get_msg 'bad_opt')" "${opt}"
				exit 1
				;;
		esac
	done

	# Set default option values.
	[ -z "${opt_build}" ] && opt_build='full'
	[ -z "${opt_check_build_deps}" ] && opt_check_build_deps='true'
	[ -z "${opt_uid0_cmd}" ] && opt_uid0_cmd='fakeroot'

	# Set default target and cleaning behavior.
	if [ -n "${opt_target}" ]; then
		[ -z "${opt_clean}" ] && opt_clean='false'
	else
		if [ "${opt_build}" = 'full' ]; then
			opt_target='binary'
		else
			opt_target="${opt_build}"
		fi
		[ -z "${opt_clean}" ] && opt_clean='true'
	fi
}

test_uid0_cmd()
{
	# Verify that the UID 0 command works.
	test_uid=$("${opt_uid0_cmd}" id -u)

	if [ ${?} -ne 0 ]; then
		ob_error "$(ob_get_msg 'uid0_cmd_not_found')" "${opt_uid0_cmd}"
	fi

	if [ ${test_uid} -ne 0 ]; then
		ob_error "$(ob_get_msg 'uid0_cmd_bad_uid')" "${opt_uid0_cmd}"
	fi
}

setup_arch_plat()
{
	OB_BUILD_ARCH="$(ob_get_system_arch)"
	OB_BUILD_PLATFORM="$(ob_get_system_plat)"

	if [ -n "${opt_host_arch}" ]; then
		OB_HOST_ARCH="${opt_host_arch}"
	else
		OB_HOST_ARCH="${OB_BUILD_ARCH}"
	fi

	if [ -n "${opt_host_plat}" ]; then
		OB_HOST_PLATFORM="${opt_host_plat}"
	else
		OB_HOST_PLATFORM="${OB_BUILD_PLATFORM}"
	fi

	IFS=- read OB_BUILD_ARCH_CPU OB_BUILD_ARCH_KERNEL OB_BUILD_ARCH_LIBS <<EOF
${OB_BUILD_ARCH}
EOF
	IFS=- read OB_HOST_ARCH_CPU OB_HOST_ARCH_KERNEL OB_HOST_ARCH_LIBS <<EOF
${OB_HOST_ARCH}
EOF
}

build_source()
{
	src="$(ob_get_source_parameter 'Source')"
	ver="$(ob_get_source_parameter 'Version')"
	src_pkg_data_base="src:${src}.data/usr/src/${src}_${ver}"

	"${opt_uid0_cmd}" mkdir -p \
		"${src_pkg_data_base}" || \
		ob_error "$(ob_get_msg 'cant_make_src_pkg_dir')"

	for file in ../*; do
		case "${file}" in
			../tmp)
				;;
			../*)
				"${opt_uid0_cmd}" cp -R "${file}" "${src_pkg_data_base}" || \
					ob_error "$(ob_get_msg 'cant_install_src_pkg_file')"
				;;
		esac
	done

	# TODO: gencontrol, buildopk.

	rm -Rf "src:${src}.data" || ob_error "$(ob_get_msg 'cant_rm_src_pkg_data')"
}

main "${@}"