# opkhelper
# lib/buildsystem
# Interface for interacting with software build systems.
#
# 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 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/>.

[ -n "${_OH_BUILDSYSTEM_SM}" ] && return 0
_OH_BUILDSYSTEM_SM='true'

_OH_BUILDSYSTEMS='
autoconf
make
'

oh_buildsystems_init()
{
	_oh_local _ohbsi_bs

	for _ohbsi_bs in ${_OH_BUILDSYSTEMS}; do
		oh_use "buildsystem/${_ohbsi_bs}"
	done

	_OH_BUILDSYSTEM_WORK_AREA="${PWD}"
	_OH_BUILDSYSTEM_SOURCE_DIR="$(cd src && pwd)"

	[ -z "${_OH_BUILDSYSTEM_BUILD_DIR}" ] && \
		_OH_BUILDSYSTEM_BUILD_DIR="${PWD}/src"
	[ -z "${_OH_BUILDSYSTEM_DESTDIR}" ] && \
		_OH_BUILDSYSTEM_DESTDIR="${PWD}/dest"
	[ -z "${_OH_BUILDSYSTEM_SYSTEM}" ] && \
		_OH_BUILDSYSTEM_SYSTEM=''
}

oh_set_buildsystem_option()
{
	_oh_local _ohsbso_name _obsbso_value

	if [ ${#} -eq 2 ]; then
		_ohsbso_name="${1}"
		_ohsbso_value="${2}"
	else
		_oh_return 125
		return ${?}
	fi

	case "${_ohsbso_name}" in
		'build-dir')
			_OH_BUILDSYSTEM_BUILD_DIR="${_ohsbso_value}"
			;;
		'destdir')
			_OH_BUILDSYSTEM_DESTDIR="${_ohsbso_value}"
			;;
		'build-system')
			_OH_BUILDSYSTEM_SYSTEM="${_ohsbso_value}"
			;;
		*)
			_oh_return 125
			return ${?}
			;;
	esac
}

oh_buildsystem_do()
{
	_oh_local _ohbsd_step _ohbsd_bs _ohbsd_done

	if [ ${#} -ge 1 ]; then
		_ohbsd_step="${1}"
		shift 1
	else
		_oh_return 125
		return ${?}
	fi

	_ohbsd_done='false'

	if [ -n "${_OH_BUILDSYSTEM_SYSTEM}" ]; then
		if "_oh_${_OH_BUILDSYSTEM_SYSTEM}_can_${_ohbsd_step}"; then
			"_oh_${_OH_BUILDSYSTEM_SYSTEM}_${_ohbsd_step}" "${@}"
			_ohbsd_done='true'
		fi
	else
		for _ohbsd_bs in ${_OH_BUILDSYSTEMS}; do
			if "_oh_${_ohbsd_bs}_can_${_ohbsd_step}"; then
				"_oh_${_ohbsd_bs}_${_ohbsd_step}" "${@}"
				_ohbsd_done='true'
				break
			fi
		done
	fi

	if ! ${_ohbsd_done}; then
		: error
	fi
}