#!/bin/sh

#
# pkgupdate - backup, then update packages cleverly from pkgsrc
#
#  Copyright (c) 2004, 2005, 2006 Karsten Kruse tecneeq(at)tecneeq(dot)de
#  All rights reserved.
#
#  Redistribution and use in source and binary forms, with or without
#  modification, are permitted provided that the following conditions
#  are met:
#
#  1. Redistributions of source code must retain the above copyright
#     notice, this list of conditions and the following  disclaimer.
#  2. Redistributions in binary form must reproduce the above copyright
#     notice, this list of conditions and the following disclaimer in
#     the documentation and/or other materials provided with the
#     distribution.
#  3. Neither the name of the author nor the names of its contributors
#     may be used to endorse or promote products derived from this
#     software without specific prior written permission.
#
#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
#  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
#  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
#  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
#  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
#  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
#  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
#  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
#  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

my_pkg_backups="/tmp/pkgbackup"
my_pkg_list="/usr/pkgsrc/pkgchk.conf"
my_temp="/tmp/saveupdate"

die() {
  echo Error: $1
  exit 1
}

mkdir -p $my_temp || die "could not create the directory $my_temp"

# needed software
for i in pkglint pkgdepgraph pkg_tarup ; do
  pkg_info -qe $i || die "$i is needed but not yet installed"
done

# find newer packages
lintpkgsrc -i > $my_temp/update.txt

echo "Generating list of packages to backup and delete"
pkgdepgraph -D $my_temp/update.txt  > $my_temp/delete.txt

echo "Generating list of packages to rebuild"
pkgdepgraph -R $my_temp/update.txt > $my_temp/rebuild.sh

export PKGREPOSITORY=${PKGREPOSITORY:-$my_pkg_backups}
echo "Backing up installed packages to $PKGREPOSITORY"
mkdir -p $PKGREPOSITORY || die "could not create $PKGREPOSITORY"
pkg_tarup `cat $my_temp/delete.txt` | egrep -v "^Registering |^Creating binary"
echo "In case something goes wrong you can install your old packages wich"
echo "are saved to $PKGREPOSITORY"

echo "Deleting old, installed packages"
pkg_delete `cat $my_temp/delete.txt`

echo "Rebuilding the new packages"
sh $my_temp/rebuild.sh

rm -rf $my_temp || die "could not remove the directory $my_temp"

# eof