signa(){
    #get rid of Testing use only watermark
    echo "3249c5b75bccae3ce4f3a65e88154133:037beb866bf8830dd7c3956cb0746c02077cfc8e628f837db0ba8666b127700b07:027af2d53eae960ad291c066b0267157567ea68462f9985f86c3916abe767101027ef2d43daf9659d2c19e38b02676575079a7d663fa980a86c29469bf257151027e" > etc/ati/signature
}

whisperer(){
    echo "----------------------------------------------------------------"
    echo "You can use the tool 'aticonfig' to generate an xorg.conf file."
    echo "--------------------- ^^^^^^^^^ --------------------------------"
    echo "fglrx was added into /etc/modules-load.d/catalyst.conf"
    echo "----------------------------------------------------------------"
    echo "	atieventsd (needs acpid pkg) on systemd:"
    echo "systemctl enable atieventsd"
    echo "systemctl start atieventsd"
    echo "----------------------------------------------------------------"
    echo "For more info and troubleshooting visit:"
    echo "http://wiki.archlinux.org/index.php/ATI_Catalyst"
    echo "----------------------------------------------------------------"
    echo -e '\E[37;44m'"\033[1m----------------------------------------------------------------\033[0m"
    echo -e '\E[37;44m'"\033[1m				ATTENTION!\033[0m"
    echo -e '\E[37;44m'"\033[1m----------------------------------------------------------------\033[0m"
    echo "To enable 'automatic re-compilation while system shutdown/reboot' "
    echo "testing feature run these commands as root:"
    echo "systemctl enable catalyst-hook"
    echo "systemctl start catalyst-hook"
    echo ""
    echo "More info here:"
    echo "https://bbs.archlinux.org/viewtopic.php?pid=1255575#p1255575"
    echo -e '\E[37;44m'"\033[1m----------------------------------------------------------------\033[0m"
}

bug_whisper(){
    echo -e '\E[37;44m'"\033[1m---------------- I/O BUG ---------------------------------------\033[0m"
    echo "There's a bug in fglrx found by lano1106 which generates"
    echo "great amount of unneeded I/O operations"
    echo ""
    echo "To activate workaround enable systemd service:"
    echo "systemctl enable temp-links-catalyst"
    echo "systemctl start temp-links-catalyst"
    echo ""
    echo "More infos:"
    echo "https://bbs.archlinux.org/viewtopic.php?pid=1279977#p1279977"
    echo "https://bbs.archlinux.org/viewtopic.php?pid=1280193#p1280193"
    echo -e '\E[37;44m'"\033[1m----------------------------------------------------------------\033[0m"
}

#pXp = powerXpress, set catalyst libs as default
pXp_set_to_amd(){
    usr/lib/fglrx/switchlibGL amd
    usr/lib/fglrx/switchlibglx amd
}

captain_hook(){
    # add hook fglrx to mkiniticpio
    hooks=$(grep ^HOOKS etc/mkinitcpio.conf | grep fglrx)
    if [ "$hooks" = "" ]; then
        sed 's/^HOOKS="\([^"]*\)"/HOOKS="\1 fglrx"/' -i etc/mkinitcpio.conf
    fi
}

post_install(){
    captain_hook
    usr/bin/catalyst_build_module ra
    usr/bin/catalyst_build_module all
    pXp_set_to_amd
    whisperer
    bug_whisper
#    signa
}

post_upgrade(){
    usr/bin/catalyst_build_module ra
    usr/bin/catalyst_build_module all
    whisperer
    bug_whisper
#    signa
}

pre_remove(){
    usr/bin/catalyst_build_module remove_all
}

post_remove(){
    #remove /usr/lib/catalystpxp/libGL.so* symlinks and dir
    rm usr/lib/catalystpxp/libGL.so* &>/dev/null
    rmdir -p "usr/lib/catalystpxp/" --ignore-fail-on-non-empty &>/dev/null
    #remove usr/lib/xorg/modules/updates/extensions/libglx.so symlink and dir
    rm usr/lib/xorg/modules/updates/extensions/libglx.so &>/dev/null
    rmdir -p "usr/lib/xorg/modules/updates/extensions" --ignore-fail-on-non-empty &>/dev/null
    rmdir -p "usr/lib/xorg/modules/updates" --ignore-fail-on-non-empty &>/dev/null
    rm /etc/modules-load.d/catalyst.conf &>/dev/null
    rmdir -p "usr/lib32/catalystpxp/" --ignore-fail-on-non-empty &>/dev/null

    # remove hook fglrx
    sed '/^HOOKS/s/ *fglrx//' -i etc/mkinitcpio.conf

    # remove log
    rm -f var/log/catalyst-install.log

    echo "----------------------------------------------------------------"
    echo " Don't forget to recover your original xorg.conf file."
    echo "----------------------------------------------------------------"
}