#! /bin/sh
# preinst script for nvidia-current-dev
#
# see: dh_installdeb(1)
#
# Copyright (C) 2009-2010 Canonical Ltd
# Authors: Alberto Milone
#
set -e

case "$1" in
    install|upgrade)
    # We need to remove diversions from previous versions of the package
    
    if [ -d /usr/share/nvidia-glx/diversions/ ] ; then
        rm -f /usr/lib/libGL.so 
            rm -f /usr/lib/libGL.a 
            dpkg-divert --remove --rename --package nvidia-glx-dev --divert /usr/share/nvidia-glx/diversions/libGL.so /usr/lib/libGL.so > /dev/null
        dpkg-divert --remove --rename --package nvidia-glx-dev --divert /usr/share/nvidia-glx/diversions/libGL.a  /usr/lib/libGL.a > /dev/null

        rmdir  /usr/share/nvidia-glx/diversions/ || true
        rmdir /usr/share/nvidia-glx || true
    fi

    if [ ! -d /usr/lib/nvidia ]; then
        mkdir -p /usr/lib/nvidia || true
    fi

    # Remove old old old gl header diversions
    if [ -e /usr/share/nvidia-glx/diversions/gl.h ]; then
      if [ -e /usr/include/GL/gl.h ]; then 
          rm -f /usr/include/GL/gl.h /usr/include/GL/glx.h /usr/include/GL/glxtokens.h
      fi        
      dpkg-divert --remove --rename --package nvidia-glx-dev --divert /usr/share/nvidia-glx/diversions/gl.h /usr/include/GL/gl.h > /dev/null
      dpkg-divert --remove --rename --package nvidia-glx-dev --divert /usr/share/nvidia-glx/diversions/glx.h /usr/include/GL/glx.h > /dev/null
      dpkg-divert --remove --rename --package nvidia-glx-dev --divert /usr/share/nvidia-glx/diversions/glxext.h /usr/include/GL/glxext.h > /dev/null
    fi


    # Make sure that no diversion is still there
    set -a "nvidia-glx-dev" "nvidia-glx-new-dev" "nvidia-glx-legacy-dev" "nvidia-glx-dev-envy"\
            "nvidia-glx-new-dev-envy" "nvidia-glx-legacy-dev-envy" "nvidia-glx-180-dev" \
            "nvidia-glx-177-dev" "nvidia-glx-173-dev" "nvidia-glx-96-dev" "nvidia-glx-71-dev" \
            "nvidia-glx-185-dev" "nvidia-glx-190-dev"

    while [ $# -ge 1 ]; do
        glxdevname=$1

        if dpkg-divert --list /usr/lib/libGL.so | grep $glxdevname > /dev/null ; then 
            dpkg-divert --remove --rename --package $glxdevname --divert /usr/lib/nvidia/libGL.so.xlibmesa /usr/lib/libGL.so > /dev/null
        fi
        if dpkg-divert --list /usr/lib/libGL.a | grep $glxdevname > /dev/null ; then 
            dpkg-divert --remove --rename --package $glxdevname --divert /usr/lib/nvidia/libGL.a.xlibmesa /usr/lib/libGL.a > /dev/null
        fi
        if dpkg-divert --list /usr/X11R6/lib/libGL.so | grep $glxdevname > /dev/null ; then  
               dpkg-divert --remove --rename --package $glxdevname --divert /usr/X11R6/lib/nvidia/libGL.so.xlibmesa /usr/X11R6/lib/libGL.so > /dev/null
        fi
        if dpkg-divert --list /usr/X11R6/lib/libGL.so | grep $glxdevname > /dev/null ; then 
            dpkg-divert --remove --rename --package $glxdevname --divert /usr/X11R6/lib/nvidia/libGL.a.xlibmesa /usr/X11R6/lib/libGL.a > /dev/null    
        fi

        shift
    done

  ;;

    abort-upgrade)
    ;;

    *)
        echo "preinst called with unknown argument \`$1'" >&2
        exit 0
    ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

#DEBHELPER#

exit 0