postinst is in tgif 1:4.2.5-1.2.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47  | #!/bin/sh -e
# Source debconf library.
. /usr/share/debconf/confmodule
# Automatically added by dh_installmenu
if [ "$1" = "configure" ] && [ -x "`which update-menus 2>/dev/null`" ]; then
	update-menus
fi
# End automatically added section
default_file=/etc/default/tgif
# Get debconf answers
db_get tgif/papersize
papersize=$RET
db_get tgif/gridunits
gridunits=$RET
case $papersize in
    A4)     paper="21cm x 29.7cm" ;;
    Letter) paper="8.5in x 11in" ;;
esac
case $1 in
   abort-upgrade|abort-remove|abort-deconfigure ) 
   exit 0
   ;;
   configure|reconfigure )
   if [ -f $default_file ]
   then
       sed '/^! START debconf/,+5 d' $default_file
   else
       touch $default_file
   fi
   echo "! START debconf block - DO NOT EDIT" >>$default_file
   echo "! " >>$default_file
   echo "Tgif*InitialPaperSize: $paper" >>$default_file
   echo "Tgif*GridSystem: $gridunits" >>$default_file
   echo "!" >>$default_file
   echo "! END debconf block" >>$default_file
   ;;
   * )
   echo "postinst called with unknown argument \`$1'" >&2
   exit 1
   ;;
esac
 |