debian/preinst

   1 #! /bin/sh
   2
   3 set -e
   4
   5 # dpkg does this for us while we are upgrading..
   6 #if [ "$1" = "upgrade" -a -L /var/state/apt -a -e /var/lib/apt -a ! -L /var/state/apt ] && dpkg --compare-versions "$2" ">=" "0.4.10"; then
   7 #  rm /var/state/apt
   8 #fi
   9
  10 if [ "$1" = "upgrade" -o "$1" = "install" -a "$2" != "" ]; then
  11   if [ ! -e /var/lib/apt -a -e /var/state/apt ]; then
  12     # upgrading from /var/state/apt using apt.
  13     # it's probably running now so we want to ensure /var/state/apt
  14     # is still valid afterwards. and since we're upgrading
  15
  16     if [ -x /usr/bin/perl -a -d /var/state/apt -a ! -L /var/state/apt ] &&
  17       perl -e 'exit 1 if ((stat("/var/lib"))[0] != (stat("/var/state/apt"))[0])'
  18     then
  19       # same fs, we can mv it
  20       mv /var/state/apt /var/lib/apt
  21       ln -s ../lib/apt /var/state/apt
  22       # note that this symlink (/var/state/apt) will be removed when
  23       # dpkg finishes unpacking the apt we're about to install; this is okay
  24     else
  25       # scary, let's just symlink it and hope
  26       ln -s /var/state/apt /var/lib/apt
  27     fi
  28   fi
  29   touch /var/lib/apt/lists/partial/.delete-me-later || true
  30 fi
  31
  32 #DEBHELPER#