#!@@SHELL@@
#
# opkhelper
# src/oh-checkbuilddeps
# Make sure that package build dependencies are installed.
#
# 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@@/opkhelper/controlfields
. @@LIBDIR@@/opkhelper/messages

print_usage()
{
	printf 'Usage: %s [-s status-override]\n' "${1}"
}

opts=$(getopt -n "${0}" -o 's:' -- "${@}")
if [ ${?} -ne 0 ]; then
	print_usage "${0}" >&2
	exit 1;
fi
eval set -- "${opts}"
while true; do
	case "${1}" in
		-s)
			status_file="${2}"
			shift 2
			break
			;;
		--)
			shift
			break
			;;
		*)
			print_usage "${0}" >&2
			exit 1
			;;
	esac
done
if [ "${1}" = '--' ]; then
	shift
fi

if [ ${#} -ne 0 ]; then
	print_usage ${0} >&2
	exit 1
fi

oh_info 'Checking build dependencies...'

IFS=','
for dep in $(oh_get_field Build-Depends); do
	# XXX: Do all shells split fields in a 'for' construct all at once, or do
	# some split only as much as they need each iteration?
	unset IFS

	# Strip leading and trailing whitespace.
	dep=$(echo ${dep} | sed 's/^ *\(.*\) *$/\1/')

	# Check for the dependency in the package status override file, if provided.
	if [ -n "${status_file}" ]; then
		grep "${dep}" "${status_file}" > /dev/null
		if [ ${?} -eq 0 ]; then
			continue;
		fi
	fi

	# TODO: Test this.
	if [ -z "$(opkg status "${dep}" | grep "^Package: ${dep}")" ]; then
		oh_error 'Dependency %s not installed' "${dep}"
	fi
done

unset IFS