# ProteanOS Development Kit
# lib/feed.sh
# Functions for handling feed index files
#
# 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 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/>.

[ "x${_FEED_SM+set}" = 'xset' ] && return 0
_FEED_SM=1

use fd

feed_download()
{
	local feed_index="${1}"

	wget -O - "${feed_index}"

	return 0
}

feed_find_pkgs()
{
	local deps_file="${1}"
	local line=
	local deps_fd=
	local pkg=
	local deps=
	local all_deps=
	local dep=
	local pkgs=
	local new_deps=

	fopen "${deps_file}" 'w'
	deps_fd=${FD}

	pkg=''
	all_deps=''
	IFS=''
	while read -r line; do
		unset IFS
		if [ "x${line}" != 'x' ]; then
			case "${line}" in
				'Package:'*)
					pkg="${line#Package:}"
					pkg="${pkg## }"
					;;
				*'Depends:'*)
					deps="${line#*Depends:}"
					deps="${deps## }"
					all_deps="${all_deps}${deps}, "
					;;
			esac
		else
			if profile_include_pkg "${pkg}"; then
				pkgs="${pkgs} ${pkg}"
			fi
			new_deps=''
			IFS=", ${HT}${LF}"
			for dep in ${all_deps}; do
				unset IFS
				# Trim off " |.*$" and " (.*$" (versions and
				# disjunctions).
				dep="$(printf '%s ' ${dep} | cut -d ' ' -f 1)"
				new_deps="${new_deps} ${dep}"
			done
			unset IFS
			printf '%s%s\n' "${pkg}" "${new_deps}" >&${deps_fd}
			pkg=''
			all_deps=''
		fi
	done
	unset IFS

	fclose ${deps_fd}

	return 0
}