A script which provides a simple GUI wrapper for minetestserver

mt_servermon.sh

#!/bin/bash
## ###################
## This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
## Read the license terms at http://creativecommons.org/licenses/by-nc-sa/4.0/
## ###################
## You can find the latest version of this script at https://gist.github.com/Fritigern/7654e5115c64e87f5cea
## ###################
## Note that this script depends on Yad, which is a fork of Zenity
## If your distro's repository does not contain Yad, then you can download it from 
## http://sourceforge.net/projects/yad-dialog/
## ###################

#Let's have a debug mode, it comes in useful sometimes
DEBUG_MODE=TRUE

# Default values to get you started. Prolly won't be right for you.
instl_path="/home/$USER/Minetest"
executable="$instl_path/bin/minetestserver"
world="$instl_path/worlds/myworld"
game="$instl_path/games/minetest_game"
server_files="$instl_path/worlds/myworld"
logs_path="$instl_path/worlds/myworld/logs"
server_port="30000"

#Read config file
. ~/.mtserv.rc 

#I've forgot why i needed this. Leaving it in for now.
cd $instl_path

#Some code that i have found to get a list of subfolders and store them in an array.
#Getting the list of worlds
declare -a worlds
i=1
for d in $instl_path/worlds/*/
do
    worlds[i++]="${d%/}"
done
# And now we turn the array into a string, with the exclamation mark as separator.
world_list=$(IFS='!';echo "${worlds[*]}";IFS=$' \t\n')

declare -a games
i=1
for d in $instl_path/games/*/
do
    games[i++]="${d%/}"
done
# And now we turn the array into a string, with the exclamation mark as separator.
games_list=$(IFS='!';echo "${games[*]}";IFS=$' \t\n')

# Bunch of functions. Their names are self-explanatory
function start_server {
    echo "----------------------" >>$logs_path/debug.txt
    echo "Server started at "`date` >>$logs_path/debug.txt
    echo "----------------------" >>$logs_path/debug.txt
    exec $executable \
	    --worldname $world \
	    --config $server_files/minetest.conf \
	    --gameid $game \
	    --port $server_port \
	    --logfile $logs_path 2>&1 | yad --text-info\
		--geometry 800x600\
		--fore="#000000"\
		--back="#ffffff"\
		--tail\
		--fontname="PT mono, monospace"\
		--button="Restart:11"\
		--button="Stop:12"
    ret=$?
}
export -f start_server

function restart_server {
    echo "**** Stopping server ****"
    echo " "
    killall -s HUP minetestserver
    sleep 5
    echo "**** Starting server ****"
    echo " "
    echo "----------------------" >>$logs_path/debug.txt
    echo "Server restarted at "`date` >>$logs_path/debug.txt
    echo "----------------------" >>$logs_path/debug.txt
    
    exec $executable \
	    --worldname $world \
	    --config $server_files/minetest.conf \
	    --gameid $game \
	    --port $server_port \
	    --logfile $logs_path 2>&1 | yad --text-info\
		--geometry 800x600\
		--fore="#000000"\
		--back="#ffffff"\
		--tail\
		--fontname="PT mono, monospace"\
		--button="Restart:11"\
		--button="Stop:12"
    ret=$?
}
export -f restart_server

function stop_server {
    echo "**** Stopping server ****"
    echo " "
    killall -s HUP minetestserver
    exit 0
}
export -f stop_server

function save_config {
    echo 'instl_path="'$instl_path'"' > ~/.mtserv.rc
    echo 'executable="'$executable'"' >> ~/.mtserv.rc
    echo 'world="'$world'"' >> ~/.mtserv.rc
    echo 'game="'$game'"' >> ~/.mtserv.rc
    echo 'server_files="'$server_files'"' >> ~/.mtserv.rc
    echo 'logs_path="'$logs_path'"' >> ~/.mtserv.rc
    echo 'server_port="'$server_port'"' >> ~/.mtserv.rc
    # eval exec "start_server"    # <=== Does not work right now, Not sure why. Using the code below as workaround.
    echo "----------------------" >>$logs_path/debug.txt
    echo "Server started at "`date` >>$logs_path/debug.txt
    echo "----------------------" >>$logs_path/debug.txt
    exec $executable \
	    --worldname $world \
	    --config $server_files/minetest.conf \
	    --gameid $game \
	    --port $server_port \
	    --logfile $logs_path 2>&1 | yad --text-info\
		--geometry 800x600\
		--fore="#000000"\
		--back="#ffffff"\
		--tail\
		--fontname="PT mono, monospace"\
		--button="Restart:11"\
		--button="Stop:12"
    ret=$?
}
export -f save_config

# Build the first gui and populate it either with the values from the config, or with default values if there is no config yet.
OUTPUT=$(yad --title="Minetest Server Monitor"\
    --text="                         Simple Minetest Server Monitor"\
    --geometry=600x300\
    --separator="!"\
    --form\
      --field="Install Path" $instl_path\
      --field="Executable:FL" "$instl_path/bin/minetestserver"\
      --field="World:CB" $world_list\
      --field="Game:CB" $games_list\
      --field="Server Files" $server_files\
      --field="Logs Path" "$logs_path"\
      --field="Port" $server_port\
      --button="Save config:20"\
      --button="Start:10" \
      --button="gtk-cancel:99"
      )

ret=$? # Get return code, and split that into variables.

      instl_path=$(awk -F! '{print $1}' <<<$OUTPUT)
      executable=$(awk -F! '{print $2}' <<<$OUTPUT)
      world=$(basename $(awk -F! '{print $3}' <<<$OUTPUT))
      game=$(basename $(awk -F! '{print $4}' <<<$OUTPUT))
      server_files=$(awk -F! '{print $5}' <<<$OUTPUT)
      logs_path=$(awk -F! '{print $6}' <<<$OUTPUT)
      server_port=$(awk -F! '{print $7}' <<<$OUTPUT)
      
      # If the DEBUG_MODE is active, then we will show the contents of the variables in the terminal
      if [ $DEBUG_MODE == TRUE ]; then
	  echo "OUTPUT = $OUTPUT"
	  echo "executable = $executable"
	  echo "instl_path = $instl_path"
	  echo "world = $world"
	  echo "game = $game"
	  echo "server_files = $server_files"
	  echo "logs_path = $logs_path"
	  echo "server_port = $server_port"
      fi

# Now we execute the functions, based on which button was clicked.
while true
  do
    case $ret in
	10*) "start_server" ;;
	11*) "restart_server" ;;
	12*) "stop_server" ;;
	20*) "save_config" ;;
	*) echo "exit $?" ; exit 1 ;;
    esac
    eval exec $cmd
  done

# Quit, Snagglepuss style!
stageleft=0
exit $stageleft