#!/bin/sh
#
# Copyright (C) 2013  Etersoft
# Copyright (C) 2013  Vitaly Lipatov <lav@etersoft.ru>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#

load_helper epm-query
load_helper epm-print

epm_provides_files()
{
	local pkg_files="$*"
	[ -n "$pkg_files" ] || return

	local PKGTYPE="$(get_package_type $pkg_files)"

	case $PKGTYPE in
		rpm)
			assure_exists rpm
			docmd rpm -q --provides -p $pkg_files
			;;
		deb)
			assure_exists dpkg
			# FIXME: will we provide ourself?
			docmd dpkg -I $pkg_files | grep "^ *Provides:" | sed "s|^ *Provides:||g"
			;;
		*)
			fatal "Have no suitable command for $PMTYPE"
			;;
	esac
}


epm_provides_names()
{
	local pkg_names="$*"
	local CMD
	[ -n "$pkg_names" ] || return

# by package name
case $PMTYPE in
	apt-rpm)
		# FIXME: need fix for a few names case
		# TODO: separate this function to two section
		if is_installed $pkg_names ; then
			CMD="rpm -q --provides"
		else
			EXTRA_SHOWDOCMD=' | grep "Provides:"'
			docmd apt-cache show $pkg_names | grep "Provides:"
			return
		fi
		;;
	urpm-rpm|zypper-rpm|yum-rpm|dnf-rpm)
		if is_installed $pkg_names ; then
			CMD="rpm -q --provides"
		else
			fatal "FIXME: use hi level commands"
		fi
		;;
	emerge)
		assure_exists equery
		CMD="equery files"
		;;
#	yum-rpm)
#		CMD="yum deplist"
#		;;
	pkgng)
		CMD="pkg info -b"
		;;
	apt-dpkg)
		# FIXME: need fix for a few names case
		if is_installed $pkg_names ; then
			info "Please inform the author how to get provides from dpkg"
		fi
		#	CMD="rpm -q --provides"
		#else
			EXTRA_SHOWDOCMD=' | grep "Provides:"'
			docmd apt-cache show $pkg_names | grep "Provides:"
			return
		#fi
		;;
	*)
		fatal "Have no suitable command for $PMTYPE"
		;;
esac

docmd $CMD $pkg_names

}

epm_provides()
{
	[ -n "$pkg_filenames" ] || fatal "Provides: missing package(s) name"

	epm_provides_files $pkg_files
	# shellcheck disable=SC2046
	epm_provides_names $(print_name $pkg_names)
}