#!/bin/bash

# Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
# based on distrib-info by Jacques Gelinas
# Debian support shoe-horned in by Matthew Lavy <mml@mupsych.org>
#
# 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, 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  

# This scripts knows about every possible distribution (well, it should)
# It is passed a vserver name and a key (a command). The key represent a task.
# It executes the command and output on stdout.
# For example
# distrib-info vserver1 pkgversion
# If vserver1 is a redhat system, it executes
# rpm -qa --queryformat "%{name}=%{version}-%{release}
: ${UTIL_VSERVER_VARS:=$(dirname $0)/util-vserver-vars}
test -e "$UTIL_VSERVER_VARS" || {
    echo "Can not find util-vserver installation; aborting..."
    exit 1
}
. "$UTIL_VSERVER_VARS"

if [ "$1" = "" ] ; then
	echo distrib-info vserver-name command [ args ... ] >&2
	echo Commands are: >&2
	echo dumpfiles: Shows all files owned by a package >&2
	echo pkgversion: reports all packages and their version/release >&2
	echo unifiles: reports all unify-able file of a package >&2
	exit 1
fi
if [ "$1" = "/" ] ; then
	DISTDIR=/
	CHROOTCMD=
elif [ -d "$1" ] ; then
	DISTDIR=$1
	CHROOTCMD="$SBINDIR/chroot $DISTDIR"
else
	DISTDIR=$VROOTDIR/$1
	CHROOTCMD="$SBINDIR/chroot $DISTDIR"
fi
KEY=$2
shift
shift
if [ -f $DIRDIR/etc/redhat-release -o -f $DISTDIR/etc/mandrake-release ] ; then
	case $KEY in
	pkgversion)
		$CHROOTCMD /bin/rpm -qa --queryformat "%{name}=%{version}-%{release}\n"
		;;
	unifiles)
		# We remove /etc and /var/log to make sure no special file
		# there will be unified
		$CHROOTCMD /bin/rpm -ql --dump $* \
			| $PKGLIBDIR/parserpmdump /etc/
		;;
	dumpfiles)
		$CHROOTCMD /bin/rpm -ql $*
		;;
	*)
		echo unknown request $KEY >&2
		;;
	esac
elif [ -f $DISTDIR/etc/debian_version ] ; then
	case $KEY in
	pkgversion)
	    $CHROOTCMD /usr/bin/dpkg-query -W \
		--showformat='${Package}=${Version}#${Status}\n' \
		| perl -pe 's/(.+)-.*/$1/' \
		| grep "install ok installed" | cut -d"#" -f1
	    ;;
	unifiles)
	    echo $* | perl -pe 's/(.+)-.*/$1/' \
		| xargs $CHROOTCMD /usr/bin/dpkg -L \
		| grep -v  "^/etc\|^/var"
	    ;;
	dumpfiles)
	    echo $* | perl -pe 's/(.+)-.*/$1/' \
		| xargs $CHROOTCMD /usr/bin/dpkg -L
	    ;;
	*)
	    echo unknown request $KEY >&2
	    ;;
	esac
else
	echo Distribution not supported yet >&2
fi