Automatic updates for autobuilds

Code:
#!/bin/bash

## ===user config===



## those 2 settings are default actions which are chosen when the script is called without parameters

## just set them to whatever you find useful; look at the script's function print_help() below for a brief description, the parameters are the same

## possible default actions are "update", "start" and "update_start"

default_action="update_start"

## possible default builds are "sdl" and "glx"

default_build="sdl"



## [GENERALLY UNNEEDED] you do not need to set this! only use this, if you REALLY want to place the script somewhere else than the folder abve the Xonotic/Xonotic-high/Xonotic-low autobuild folder

## or if the autodetection fails (this should never happen(tm))

## just don't use it and everything is OK. If you want the script be in your $PATH, you can symlink the script into a bin directory eg. /usr/local/bin or ~/bin

#gamefolder="/usr/local/games/xonotic"

#gamefolder="$HOME/xonotic-autobuild"



## [LARGELY UNTESTED] This feature is still beta / work in progress / largely untested: It may cause system instabilities, data loss, or kills your cat and eats your hamster. You have been warned!

## Detect Window manager and compositing, if enabled

## uncomment the following line to probe for known compositing window managers

## and disable compositing while game is running; if it causes trouble, please post your used distribution, window manager and what exactly happens

#detect_wm_compositing="true"

 

## ===end of user config===

## ===script functions===



## detects the gamefolder

detect_gamefolder()

{

    gamefolder="${BASH_SOURCE[0]}";

    while  [ -h "${gamefolder}" ]; do

        gamefolder=`readlink "${gamefolder}"`

    done

    pushd . > /dev/null

    cd `dirname ${gamefolder}` > /dev/null

    gamefolder=`pwd`;

    popd  > /dev/null 

}



## detects which xonotic version/build is installed

detect_xonotic()

{

if  [ -d "$gamefolder/Xonotic-high" ]; then

    echo "start_xonotic.sh: Xonotic-high found, using that"

    xonotic=high

elif [ -d "$gamefolder/Xonotic" ]; then

    echo "start_xonotic.sh: Xonotic found, using that"

    xonotic=normal

elif [ -d "$gamefolder/Xonotic-low" ]; then

    echo "start_xonotic.sh: Xonotic-low found, using that"

    xonotic=low

else

    echo "start_xonotic.sh: WARNING: nothing game-related found here. For the first start, this is normal."

    xonotic=none

fi

}



## prints help

print_help()

{

echo "start_xonotic.sh: help"

echo "This script is intended to manage your Xonotic autobuild"

echo "usage:"

echo "\"start_xonotic.sh [mode] [binary]\""



echo "First parameter is neccessary for the second one, otherwise both are optional as"

echo "a default behaviour can be specified for both"

echo "mode can be:"

echo "\"start\": just starts the game; the script acts like a simple wrapper to start the game"

echo "\"update\": updates the game to the most recent autobuild; the script just behaves like update-xonotic.sh"

echo "\"update_start\":simply combines \"update\" and \"start\"; you always run the latest version, but it may take a long time until the game starts"

echo "\"help\": you read this help, so you already know this one ;)"

echo ""

echo "[binary] only works with the modes \"start\" and \"update_start\". It can be:"

echo "\"sdl\":starts the SDL binary; In fact, the script just calls xonotic-linux-sdl.sh inside your xonotic build"

echo "\"glx\":starts the GLX binary; Works just like the SDL parameter, but for the GLX binary"

}



## updates the game. works just like update-xonotic.sh

game_update()

{

if ! which rsync >/dev/null; then

    echo >&2 "FATAL: rsync not found, please install the rsync package"

    exit 1

fi



options="-Prtzil --executability --delete-after --delete-excluded --stats"



detect_xonotic

if  [ "$xonotic" = "low" ]; then

    url="rsync://beta.xonotic.org/autobuild-Xonotic-low/"

    target="Xonotic-low/"

elif [ "$xonotic" = "high" ]; then

    url="rsync://beta.xonotic.org/autobuild-Xonotic-high/"

    target="Xonotic-high/"

else

    url="rsync://beta.xonotic.org/autobuild-Xonotic/"

    target="Xonotic/"

fi



unset excludes

excludes="$excludes --exclude=/*.exe"

excludes="$excludes --exclude=/fteqcc/*.exe"

excludes="$excludes --exclude=/bin32"

excludes="$excludes --exclude=/*.dll"

excludes="$excludes --exclude=/bin64"



case `uname`:`uname -m` in

    Darwin:*)

        excludes="$excludes --exclude=/xonotic-linux*"

        excludes="$excludes --exclude=/fteqcc/fteqcc.linux*"

        ;;

    Linux:x86_64)

        excludes="$excludes --exclude=/Xonotic*.app"

        excludes="$excludes --exclude=/xonotic-osx-*"

        excludes="$excludes --exclude=/fteqcc/fteqcc.osx"

        excludes="$excludes --exclude=/xonotic-linux32-*"

        excludes="$excludes --exclude=/fteqcc/fteqcc.linux32"

        ;;

    Linux:i?86)

        excludes="$excludes --exclude=/Xonotic*.app"

        excludes="$excludes --exclude=/xonotic-osx-*"

        excludes="$excludes --exclude=/fteqcc/fteqcc.osx"

        excludes="$excludes --exclude=/xonotic-linux64-*"

        excludes="$excludes --exclude=/fteqcc/fteqcc.linux64"

        ;;

    *)

        echo >&2 "WARNING: Could not detect architecture - downloading all architectures"

        ;;

esac



rsync $options $excludes "$url" "$target"



}



## runs the game

game_run()

{

## detect and disable compositing(optional)

windowmanager="none"

compositing_state="false"

if  [ "$detect_wm_compositing" = "true" ]; then

    echo "start_xonotic.sh: probing for window managers with compositing support..."    

    ## KDE

    if  [ "$(ps -C kwin)" ]; then

        windowmanager="KWin"

        echo "start_xonotic.sh: KDE KWin is running, checking for compositing state"

        if  [ "$(qdbus org.kde.kwin /KWin compositingActive)" = "true" ]; then

            echo "start_xonotic.sh: Compositing state is active, disabling..."

            compositing_state="true"

            qdbus org.kde.kwin /KWin toggleCompositing

         fi

    ## KDE isn't there, so lets probe for metacity: if it is there, the following condition will fail and the next probes will be done

    elif  [  -z "$(ls /usr/bin/metacity)" ]; then

        echo "start_xonotic.sh: Metacity window manager seems not to be present on your system, so it can not be used to replace compositing window managers, skipping..."

    ## Compiz (mostly used with gnome or xfce)

    elif  [ "$(ps -C compiz)" ]; then

        echo "start_xonotic.sh: Compiz is running, so compositing is enabled; replace it with metacity"

        windowmanager="compiz"

        compositing_state="true"

        metacity --replace & > /dev/null

    ## Unity (Ubuntu)

    elif  [ "$(ps -C unity)" ]; then

        echo "start_xonotic.sh: unity is running, so compositing is enabled; replace it with metacity"

        windowmanager="unity"

        compositing_state="true"

        metacity --replace & > /dev/null

    fi

    echo "start_xonotic.sh: let the window manager start; wait 2 seconds..."

    sleep 2

fi





detect_xonotic

if  [ "$xonotic" = "high" ]; then

     cd "Xonotic-high"

elif  [ "$xonotic" = "normal" ]; then

     cd "Xonotic"

elif  [ "$xonotic" = "low" ]; then

     cd "Xonotic-low"

else

    echo "start_xonotic.sh: FATAL: ERROR in script function game_run( )"

    echo "start_xonotic.sh: cannot start the game: game not found"

    echo "start_xonotic.sh: use \"start_xonotic.sh update\" or \"start_xonotic.sh update_start\" to download the game data first"

    exit 1

fi



##start the game

if  [ "$1" = "sdl" ]; then

     ./xonotic-linux-sdl.sh

elif  [ "$1" = "glx" ]; then

     ./xonotic-linux-glx.sh

else

## in case of wrong/no parameter use autodetection through top variable

    if  [ "$default_build" = "sdl" ]; then

        ./xonotic-linux-sdl.sh

    else

        ./xonotic-linux-glx.sh

    fi

fi





##restore compositing state

if  [ "$compositing_state" = "true" ]; then

    echo "start_xonotic.sh: game quit: Compositing was active, restore..."

    if  [ "$windowmanager" = "KWin" ]; then

        echo "start_xonotic.sh: Re-enable KWin compositing"

        qdbus org.kde.kwin /KWin toggleCompositing

     fi

    if  [ "$windowmanager" = "compiz" ]; then

        echo "start_xonotic.sh: Restart Compiz"

        compiz --replace & > /dev/null

    fi

    if  [ "$windowmanager" = "unity" ]; then

        echo "start_xonotic.sh: Restart Unity"

        unity --replace & > /dev/null

    fi

fi

}



## ===end of script functions===



## ===script logic===



## if not set, detect and goto the gamefolder

if  [ -z $gamefolder ]; then

        detect_gamefolder

fi

cd "$gamefolder"

echo "start_xonotic.sh: Xonotic gamefolder is: \"$gamefolder\""





if  [ "$1" ]; then

    case "$1" in

    "start")

        if  [ "$2" = "sdl" ]; then

            echo "start_xonotic.sh: start the game using sdl"

            game_run sdl

        elif  [ "$2" = "glx" ]; then

            echo "start_xonotic.sh: start the game using glx"

            game_run glx

        else

            echo "start_xonotic.sh: ERROR: unknown parameter for gamestart: \"$2\""

            echo "start_xonotic.sh: FALLBACK: start the game using autostart values"

            game_run

        fi

    ;;

    "update")

    echo "start_xonotic.sh: update the game"

    game_update

    ;;

    "update_start")

        echo "start_xonotic.sh: update the game"

        game_update

        if  [ "$2" = "sdl" ]; then

            echo "start_xonotic.sh: start the game using sdl"

            game_run sdl

        elif  [ "$2" = "glx" ]; then

            echo "start_xonotic.sh: start the game using glx"

            game_run glx

        else

            echo "start_xonotic.sh: ERROR: unknown parameter for gamestart: \"$2\""

            echo "start_xonotic.sh: FALLBACK: start the game using autostart values"

            game_run

        fi

    ;;

    "help")

    print_help

    ;;

    *)

    echo "start_xonotic.sh: enter \"start_xonotic.sh help for usage help\""

    ;;

    esac

## check for default action to start

elif [ "$default_action" = "start" ]; then

    echo "start_xonotic.sh: default action triggered: start the game"

    game_run

elif [ "$default_action" = "update" ]; then

     echo "start_xonotic.sh: default action triggered: update the game"

    game_update

elif [ "$default_action" = "update_start" ]; then

    echo "start_xonotic.sh: default action triggered: update the game and then run it"

    game_update

    game_run

else

    echo "start_xonotic.sh: ERROR: I don't know what to do! No parameter entered and no default actions defined!"

    exit 1

fi





## ===end of script logic===