#!/bin/bash
#
# Copyright (C) 2006-2008 Eric Shubert <ejs@shubes.net>
#
# Remove troublesome and obsolete packages when upgrading
#
# This script is invoked by qtp-newmodel and qtp-build-rpms.
# Some packages need to be removed before upgrading as a one-time measure:
#   .) courier-imap-toaster-doc is obsolete
#   .) horde-toaster is obsolete
#   .) libdomainkeys was changed to libdomainkeys-toaster
#   .) control-panel-toaster needs to be removed if courier-imap-toaster
#        is less than version 4, due to the addition of courier-auth-toaster
#   .) send-emails-toaster is a sub-package to control-panel-toaster,
#        so it should be removed too to avoid problems with restarting
#
# note, it'd be nice to identify specific version/releases here
#
#   Future Enhancements
#     .) only remove packages when absolutely necessary
#        (control-panel-toaster)
#
###################################################################
# change log
# 04/20/08 shubes - modified clamav for versions <1.3.17
# 04/05/08 shubes - removed spamassassin-toaster, as that .spec file is fixed
#                   (as of spamassassin-toaster-3.1.4-1.3.14)
# 03/21/07 shubes - check if package is installed before comparing
# 03/09/07 shubes - added clamav if version <1.3.11
# 10/20/06 shubes - created, consolidating logic from calling programs.
###################################################################
## check and set up the environment
#
a1_initialization(){

UPDT_PACKAGES=$(cat $CURRENT_PACKAGES)

if [ -z "${UPDT_PACKAGES}" ] ; then
  echo "$me Error - package list not found"
  exit 1
fi

# if running in sandbox, indicate so in message
sandbox_msg=""
if [ -f /boot/.$(basename $SANDBOX) ]; then
  sandbox_msg="from sandbox (not for real)"
fi

. qtp-config -s
}

###################################################################
## create list of obsolete packages
## any toaster-debuginfo packages are obsolete too
#
a3_obsolete_packages(){

removepkgs="\
courier-imap-toaster-doc \
horde-toaster \
libdomainkeys \
spamassassin \
spamassassin-tools \
"
for dbg_pkg in $(rpm -qa | grep toaster-debuginfo); do
  removepkgs="$removepkgs $dbg_pkg"
done
}

###################################################################
## remove packages only if they're being installed
#
a5_problem_packages(){

# any version of these packages will be removed
remove_list="\
control-panel \
"
# only packages <= the specific version will be removed
remove_older="\
clamav-toaster-0.92.1-1.3.17 \
"
for UPDT_PKG in $UPDT_PACKAGES; do
  UPDT_PKGNAME=${UPDT_PKG%-[^-]*-[^-]*.src.rpm}
  UPDT_NAME=${UPDT_PKGNAME%-toaster}
  b52_remove_any_version
  b54_remove_older_version
done
}

###################################################################
## add package to list if installed, regardless of version
#
b52_remove_any_version(){

for remove_name in $remove_list; do
  if [ "$UPDT_NAME" == "$remove_name" ]; then
    if [ "$UPDT_NAME" == "control-panel" ]; then
      removepkgs="$removepkgs send-emails-toaster"
    fi
    removepkgs="$removepkgs $UPDT_PKGNAME"
  fi
done
}

###################################################################
## add package to list if installed verion is older than specified version
#
b54_remove_older_version(){

for remove_pkg in $remove_older; do
  remove_pkgname=${remove_pkg%-[^-]*-[^-]*}
  if [ "$UPDT_PKGNAME" == "$remove_pkgname" ]; then
    QMT_PKGVER=$(rpm -q $remove_pkgname)
    if [ $? == "0" ]; then
      QMT_PKGNAME=${QMT_PKGVER%-[^-]*-[^-]*}
      QMT_VERSION=${QMT_PKGVER#${QMT_PKGNAME}-}
      installed_pkgver=$remove_pkg
      x01_compare_versions
      if [ $? == "1" ]; then
        removepkgs="$removepkgs $UPDT_PKGNAME"
      fi
    fi
  fi
done
}

###################################################################
## remove packages in list if they're installed
#
a7_remove_packages(){

for pkg in $removepkgs; do
  rpm -q $pkg > /dev/null \
    && rpm -e --nodeps $pkg >>logfile 2>&1 \
    && echo "REMOVED $pkg $sandbox_msg" | tee -a $logfile
done
}

###################################################################
## main script execution begins here
#

me=$(basename $0)
myver=v0.3.1
echo "$me $myver"

a1_initialization

a3_obsolete_packages

a5_problem_packages

a7_remove_packages

exit 0