apt/dselect/install

#!/bin/sh

# Get the configuration from /etc/apt/apt.conf
CLEAN="prompt"
OPTS="-f"
APTGET="/usr/bin/apt-get"
DPKG="/usr/bin/dpkg"
set -e
RES=`apt-config shell CLEAN DSelect::Clean OPTS DSelect::Options \
                      DPKG Dir::Bin::dpkg APTGET Dir::Bin::apt-get \
		      ARCHIVES Dir::Cache::Archives/`
eval $RES
set +e

# Yes/No Prompter
yesno() {
# $1 = prompt
# $2 = default(y)
	local ans def defp
	if [ "$2" ];then
		case $2 in
			Y|y)	defp="(Y/n)" def=y;;
			N|n)	defp="(y/N)" def=n;;
			*)	echo "Bad default setting!" 1>&2; exit 1;;
		esac
	else
		defp="(y/N)" def=n
	fi
	while :;do
		echo -n "$1$defp" 1>&3
		read ans
		case $ans in
			Y|y|N|n)	break;;
			"")		ans=$def;break;;
		esac
		echo
	done
	echo $ans | tr YN yn
}

$APTGET $OPTS dselect-upgrade
RES=$?

# 1 means the user choose no at the prompt
if [ $RES -eq 1 ]; then
  exit 0
fi

# Finished OK
if [ $RES -eq 0 ]; then

   if [ `ls $ARCHIVES $ARCHIVES/partial | egrep -v "^lock$|^partial$" | wc -l` \
        -eq 0 ]; then
      exit 0
   fi
   
   # Check the cleaning mode
   case `echo $CLEAN | tr '[:upper:]' '[:lower:]'` in
     auto)
       $APTGET autoclean && echo "Press enter to continue." && read RES && exit 0;
       ;;
     always)
       $APTGET clean && echo "Press enter to continue." && read RES && exit 0;
       ;;
     prompt)
       exec 3>&1
       if [ `yesno "Do you want to erase the downloaded .deb files " y` = y ]; then
          $APTGET clean && echo "Press enter to continue." && read RES && exit 0;
       fi
       ;;
     *) 
       ;;
   esac   
else
   echo "Some errors occurred while unpacking. I'm going to configure the"
   echo "packages that were installed. This may result in duplicate errors"
   echo "or errors caused by missing dependencies. This is OK, only the errors"
   echo "above this message are important. Please fix them and run [I]nstall again"
   echo "Press enter to continue."
   read RES && $DPKG --configure -a
   exit 100
fi

exit $?