debian/wmaker.preinst

   1 #! /bin/sh
   2
   3 # set some variables to make the thing a bit more readable...
   4
   5 remove_diversion ()
   6 {
   7   real_file=$1
   8   temp_file=$1.wmaker-tmp
   9   diversion=$2
  10
  11   if [ -e ${real_file} ] ; then
  12     mv ${real_file} ${temp_file}
  13   fi
  14   dpkg-divert --remove --rename --quiet --package wmaker \
  15     --divert ${diversion} ${real_file}
  16   if [ -e ${temp_file} ] ; then
  17     mv ${temp_file} ${real_file}
  18   fi
  19 }
  20
  21 # asclock's location and its diversion
  22
  23 asclock=/usr/X11R6/bin/asclock
  24 asclock_divert_to=/usr/X11R6/bin/asclock.afterstep
  25
  26 # asclock's manpage and its diversions
  27
  28 asclock_man=/usr/X11R6/man/man1/asclock.1x.gz
  29 asclock_man_divert_to=/usr/X11R6/man/man1/asclock.afterstep.1x.gz
  30 old_asclock_man_divert_to=/usr/X11R6/man/man1/asclock.1x.afterstep.gz
  31
  32 # are the diversions present?
  33
  34 asclock_diversion=$(dpkg-divert --list | grep 'asclock .*by wmaker')
  35 asclock_man_diversion=$(dpkg-divert --list | grep 'asclock\.afterstep\.1x.*by wmaker')
  36 old_man_diversion=$(dpkg-divert --list | grep 'asclock\.1x\.afterstep.*by wmaker')
  37
  38 # ... and set a safety net in case something goes really wrong
  39
  40 set -e
  41
  42 case "$1" in
  43   upgrade|install)
  44     if [ "$old_man_diversion" ] ; then
  45       echo "Removing really old diversion of asclock manpage by wmaker..."
  46       remove_diversion ${asclock_man} ${old_asclock_man_divert_to}
  47     fi
  48
  49     if [ "$asclock_diversion" ] ; then
  50       echo "Removing diversion of asclock to asclock.afterstep..."
  51       remove_diversion ${asclock} ${asclock_divert_to}
  52     fi
  53
  54     if [ "$asclock_man_diversion" ] ; then
  55       echo "Removing diversion of asclock.1x to asclock.afterstep.1x..."
  56       remove_diversion ${asclock_man} ${asclock_man_divert_to}
  57     fi
  58
  59     exit 0
  60   ;;
  61   abort-upgrade)
  62     # the postrm has failed; preinst is only called like this after
  63     # a failed upgrade and the current postrm also fails. Now,
  64     # in what situation does this happen? Force non-zero exit code.
  65     exit 1
  66   ;;
  67 esac
  68
  69 #DEBHELPER#