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Filename : install
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#!/bin/bash

# Set the textdomain for the translations using $"..."
TEXTDOMAIN="apt"

# Get the configuration from /etc/apt/apt.conf
CLEAN="prompt"
OPTS=""
DSELECT_UPGRADE_OPTS="-f"
APTGET="/usr/bin/apt-get"
DPKG="/usr/bin/dpkg"
DPKG_OPTS="--admindir=$1"
APT_OPT0="-oDir::State::status=$1/status"
APT_OPT1="-oDPkg::Options::=$DPKG_OPTS"
set -e
RES=$(apt-config shell CLEAN DSelect::Clean OPTS DSelect::Options \
                      DPKG Dir::Bin::dpkg/f APTGET Dir::Bin::apt-get/f \
		      ARCHIVES Dir::Cache::Archives/d \
		      WAIT DSelect::WaitAfterDownload/b \
		      CHECKDIR DSelect::CheckDir/b)
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
}

if [ "$WAIT" = "true" ]; then
   $APTGET $DSELECT_UPGRADE_OPTS $OPTS "$APT_OPT0" "$APT_OPT1" -d dselect-upgrade
   echo $"Press [Enter] to continue." && read RES
   $APTGET $DSELECT_UPGRADE_OPTS $OPTS "$APT_OPT0" "$APT_OPT1" dselect-upgrade
   RES=$?
else
   $APTGET $DSELECT_UPGRADE_OPTS $OPTS "$APT_OPT0" "$APT_OPT1" dselect-upgrade
   RES=$?
fi

# 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 $ARCHIVES/partial | grep -E -v "^lock$|^partial$" | wc -l) \
        -eq 0 ]; then
      exit 0
   fi

   NEWLS=$(ls -ld $ARCHIVES)
   if [ "$CHECKDIR" = "true" ]; then
      if [ "$OLDLS" = "$NEWLS" ]; then
         exit 0
      fi
   fi
   
   # Check the cleaning mode
   case $(echo $CLEAN | tr '[:upper:]' '[:lower:]') in
     auto)
       $APTGET "$APT_OPT0" "$APT_OPT1" autoclean &&
	   echo $"Press [Enter] to continue." && read RES && exit 0;
       ;;
     always)
       $APTGET "$APT_OPT0" "$APT_OPT1" clean &&
	   echo $"Press [Enter] to continue." && read RES && exit 0;
       ;;
     prompt)
       exec 3>&1
       echo -n $"Do you want to erase any previously downloaded .deb files?"
       if [ $(yesno "" y) = y ]; then
          $APTGET "$APT_OPT0" "$APT_OPT1" clean &&
	    echo $"Press [Enter] to continue." && read RES && exit 0;
       fi
       ;;
     *) 
       ;;
   esac   
else
   echo $"Some errors occurred while unpacking. Packages that were installed"
   echo $"will be configured. 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 && $DPKG "$DPKG_OPTS" --configure -a
   exit 100
fi

exit $?