root/pbibuild/modules/assaultcube/overlay-dir/PBI.FirstRun.sh

#!/bin/sh
# Filename: PBI.FirstRun.sh
# Place any custom installation code here.
# This script will be run before your program is extracted into
# /Programs/<ProgNameVer>/
# Available variables:
# $PROGDIR - Directory where the files will be extracted to.
# $USERNAME - Username of who started the installation.
# $INSTALLMODE - Set to 'TEXT' or 'GUI', depending on which installer is running.
#
# Return a '2' to halt the PBI installation
# TIP: 'kdialog' should be used for user interaction. 
# To interact with the progress dialog echo these flags:
# echo 'TOTALSTEPS: <num>' # Set the total steps of the progress bar
# echo 'SETSTEPS: <num>' # Set the current progress of the progress bar
# echo 'MSG: <text>' # Display this text above progress bar
#########################################

if [ -e "/usr/local/bin/assaultcube_client" ]
then
    # Looks like FF is installed, ask if they want to remove the old one
    ls -al /usr/local/bin/assaultcube_client | grep Programs 2>/dev/null
    if [ "$?" = "0" ]
    then
      kdialog --yesno "AssaultCube is already installed, do you wish to uninstall it?" 
      if [ "$?" = "0" ]
      then
        FF="`ls -al /usr/local/bin/assaultcube_client | cut -d '>' -f 2 | cut -d "/" -f 3`"
        echo $FF | grep AssaultCube 2>/dev/null
        if [ "$?" = "0" ]
        then
          PBIdelete -remove ${FF}
          sleep 2
        else
          kdialog --sorry "AssaultCube could not be automatically removed... Please remove it in Add / Remove Programs and try again."
          return 2
        fi
      else
        kdialog --sorry "AssaultCube is already installed, it must be uninstalled before loading this PBI"
        return 2
      fi
      
    else
      # Could not find a link to PBI folder
      kdialog --sorry "AssaultCube is already installed, it must be uninstalled before loading this PBI"
      return 2
    fi
fi 

#3D APPLICATION: 3D ACC IS NEEDED

glxinfo | grep "direct rendering:" | grep " Yes" 2>/dev/null
if [ "$?" != "0" ]
then
   kdialog --msgbox "Your system does not appear to have hardware 3D
support enabled. This application requires 3D acceleration to function
properly."
fi