epm-requires

#!/bin/sh
#
# Copyright (C) 2012-2013, 2016  Etersoft
# Copyright (C) 2012-2013, 2016  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_requires_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 --requires -p $pkg_files
			;;
		deb)
			assure_exists dpkg
			a='' docmd dpkg -I $pkg_files | grep "^ *Depends:" | sed "s|^ *Depends:||g"
			;;
		*)
			fatal "Have no suitable command for $PKGTYPE"
			;;
	esac
}

epm_requires_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
		# FIXME: too low level of requires name (libSOME.so)
		if is_installed $pkg_names ; then
			CMD="rpm -q --requires"
		else
			#EXTRA_SHOWDOCMD=' | grep "Depends:"'
			#docmd apt-cache show $pkg_names | grep "Depends:"
			#return
			CMD="apt-cache depends"
		fi

		;;
	#zypper-rpm)
	#	# FIXME: use hi level commands
	#	CMD="rpm -q --requires"
	#	;;
	urpm-rpm)
		CMD="urpmq --requires"
		;;
	yum-rpm)
		if is_installed $pkg_names ; then
			CMD="rpm -q --requires"
		else
			CMD="yum deplist"
		fi
		;;
	dnf-rpm)
		if is_installed $pkg_names ; then
			CMD="rpm -q --requires"
		else
			CMD="dnf repoquery --requires"
		fi
		;;
	pacman)
		CMD="pactree"
		;;
	apt-dpkg|aptitude-dpkg)
		# FIXME: need fix for a few names case
		if is_installed $pkg_names ; then
			showcmd dpkg -s $pkg_names
			a='' dpkg -s $pkg_names | grep "^Depends:" | sed "s|^Depends:||g"
			return
		else
			CMD="apt-cache depends"
		fi
		;;
	emerge)
		assure_exists equery
		CMD="equery depgraph"
		;;
	pkgng)
		#CMD="pkg rquery '%dn-%dv'"
		CMD="pkg info -d"
		;;
	xbps)
		CMD="xbps-query -x"
		;;
	aptcyg)
		#CMD="apt-cyg depends"
		# print show version
		docmd apt-cyg show $pkg_names | grep "^requires: " | sed "s|^requires: ||g"
		return
		;;
	*)
		fatal "Have no suitable command for $PMTYPE"
		;;
esac


docmd $CMD $pkg_names

}

epm_requires()
{
	[ -n "$pkg_filenames" ] || fatal "Requires: missing package(s) name"
	epm_requires_files $pkg_files
	# shellcheck disable=SC2046
	epm_requires_names $(print_name $pkg_names)
}