Minecraft-Start-Server.bash finished

CentOS/Minecraft/Minecraft-Start-Server.bash

@@ -3,11 +3,47 @@
 ### CONSTANTS ###
 
 #gigabytes
-MAX_RAM=8
+MAX_MEM=8
 
 #gigabytes
 INITIAL_MEM=2
 
+#rcon password
+DEFAULT_RCON_PASSWORD=""
+
+echo_rgb() {
+  # Echo a colored string to the terminal based on rgb values
+  #
+  # Positional Arguments:
+  #
+  #   message <type: string> <position: 1> <required: true>
+  #     - The message to be printed to stdout
+  #   red <type: int> <position: 2> <required: true>
+  #     - The red value from 0 to 255
+  #   green <type: int> <position: 3> <required: true>
+  #     - The green value from 0 to 255
+  #   blue <type: int> <position: 4> <required: true>
+  #     - The blue value from 0 to 255
+  #
+  # Usage:
+  #   echo_rgb 10 80 3 "Yep"
+  #
+  # POSIX Compliant:
+  #   N/A
+  #
+
+  local red
+  local green
+  local blue
+  local input
+
+  input="${1}"
+  red="${2}"
+  green="${3}"
+  blue="${4}"
+
+  printf "\e[0;38;2;%s;%s;%sm%s\e[m\n" "${red}" "${green}" "${blue}" "${input}"
+}
 
 log() {
   # Print a message and send it to stdout or stderr depending upon log level, also configurable with debug etc.
@@ -36,7 +72,7 @@ log() {
   fi
 
   local FORMAT
-  FORMAT="[$(date +%Y-%m-%dT%H:%M:%S%z)]"
+  FORMAT="[$(echo_rgb "$(date +%Y-%m-%dT%H:%M:%S%z)" 180 140 255)]"
 
   # Convert the level to uppercase
   local level
@@ -48,28 +84,74 @@ log() {
   case "${level}" in
     INFO)
       # Output all info log levels to stdout
-      printf "${FORMAT}[INFO] %s\n" "${message}" >&1
+      printf "${FORMAT}[$(echo_rgb "INFO" 0 140 255)] %s\n" "${message}" >&1
+      return 0
+      ;;
+    WARN | WARNING)
+      # Output all info log levels to stdout
+      printf "${FORMAT}[$(echo_rgb "WARNING" 255 255 0)] %s\n" "${message}" >&1
       return 0
       ;;
     DEBUG)
       [[ ${debug} == 0 ]] && return 0
-      printf "${FORMAT}[DEBUG] %s\n" "${message}" >&1
+      printf "${FORMAT}[$(echo_rgb "DEBUG" 0 160 110)] %s\n" "${message}" >&1
       return 0
       ;;
     ERROR)
       # Output all error log levels to stderr
-      printf "${FORMAT}[ERROR] %s\n" "${message}" >&2
+      printf "${FORMAT}[$(echo_rgb "ERROR" 255 0 0)] %s\n" "${message}" >&2
       return 0
       ;;
     # Further log levels can be added by extending this switch statement with more comparisons
 
     *) # Default case, no matches
       # Returns non-zero code as an improper log option was passed, this helps with using `set -e`
-      log "ERROR" "Invalid log level passed, received level \"${level}\" with message \"${message}\""
+      printf "${FORMAT}[ERROR] %s\n" "Invalid log level passed, received level \"${level}\" with message \"${message}\"" >&2
       return 1
+      ;;
   esac
 }
 
+
+confirmation() {
+  # Receive confirmation from user as y, Y, n, or N
+  # returns 0 when answer is yes and 1 when answer is no
+  #
+  # Arguments:
+  #   message <type: string> <position: 1> <required: true>
+  #     - The confirmation prompt sent to the user, for example:
+  #       Would you like to overwrite foobar.txt (y/N)?
+  #
+  # Usage:
+  #   confirmation "Some prompt"
+  #     - Sends "Some prompt" to the user and gets their input
+  #
+  # POSIX Compliant:
+  #   Yes
+  #
+
+  local message
+  message="${1}"
+
+  local choice
+
+  while true; do
+    read -p "${message} " -n 1 -r choice
+    case "$choice" in
+      y | Y)
+      echo ""
+      return 0
+      ;;
+      n | N)
+      echo ""
+      return 1
+      ;;
+      *) echo -e "\nInput must be either y, Y, n, or N" ;;
+    esac
+  done
+}
+
+
 usage() {
   # Print out usage instructions for the local script
   #
@@ -97,6 +179,7 @@ usage() {
 
 server_id=""
 minecraft_jar=""
+rcon_ignore=0
 
 parse_args() {
   # Parse input arguments
@@ -129,6 +212,9 @@ parse_args() {
         shift
         minecraft_jar="${1}"
         ;;
+      -r | --rcon-ignore)
+        rcon_ignore=1
+        ;;
       -?*)
         printf 'Unknown option: %s\n' "$1" >&2
         usage
@@ -150,13 +236,23 @@ parse_args "$@"
 minecraft_directory=~/Minecraft/Server-"${server_id}"
 
 mkdir -p "${minecraft_directory}"
+mkdir -p "${minecraft_directory}/backups"
+
 cd "${minecraft_directory}" || (log "error" "Unable to change directory to ${minecraft_directory}" && exit 1)
 
-if [ ! -z "${minecraft_jar}" ]; then
+if [ -n "${minecraft_jar}" ]; then
-  [[ -d "${minecraft_jar}" ]] || (log "error" "Could not find a minecraft server jar at \"${minecraft_jar}\"" && exit 1)
+  if [ ! -f "${minecraft_jar}" ]; then
-  minecraft_jar_name="$(basename ${minecraft_jar})"
+    log "error" "Could not find a minecraft server jar \"${minecraft_jar}\""
-  mv "${minecraft_jar}" "${minecraft_directory}/server.jar"
+    exit 1
-  java -jar "${minecraft_directory}/${minecraft_jar_name}"
+  fi
+  minecraft_jar_name="$(basename "${minecraft_jar}")"
+  log "info" "Copying minecraft server files..."
+  cp "${minecraft_jar}" "${minecraft_directory}" \
+    && log "info" "Finished copying files"
+  mv "${minecraft_directory}/${minecraft_jar_name}" "${minecraft_directory}/server.jar"
+  log "info" "Installed a minecraft server.jar to Minecraft-Server-${server_id}"
+  java -jar "${minecraft_directory}"/server.jar > /dev/null 2>&1
+  log "info" "Successfully installed the minecraft server.jar to Minecraft-Server-${server_id}, continuing with setup"
 elif [ ! -d "${minecraft_directory}" ]; then
   log "error" "The minecraft server \"${minecraft_directory}\" did not exist, to create it please pass the \"--jar\" flag..."
   exit 1
@@ -167,23 +263,67 @@ query_port=$(("12100" + "${server_id}"))
 rcon_port=$(("12200" + "${server_id}"))
 
 
-## Set the correct ports
+## Create a backup of the config file
-sed -i "s/server-port=.+/server-port=${server_port}/g" server.properties \
+backup_extension="$(date +%Y-%m-%dT%H:%M:%S%z)"
-  && log "info" "Set the server port to ${server_port}"
+
-sed -i "s/query.port=.+/query.port=${query_port}/g" server.properties \
+log "info" "Making a backup of the server.properties file in ${minecraft_directory}/backups/server.properties.${backup_extension}"
+rm -f
+cp "${minecraft_directory}/server.properties" "${minecraft_directory}/backups/server.properties.${backup_extension}" \
+  && log "info" "Successfully created backup"
+
+## Set the correct ports
+sed -i "s/server-port=.*/server-port=${server_port}/g" server.properties \
+  && log "info" "Set the server port to ${server_port}" || exit 1
+
+sed -i "s/query.port=.*/query.port=${query_port}/g" server.properties \
+  && log "info" "Set the query port to ${query_port}" || exit 1
+
+sed -i "s/rcon.port=.*/rcon.port=${rcon_port}/g" server.properties \
+  && log "info" "Set the RCON port to ${rcon_port}" || exit 1
 
-sed -i "s/rcon.port=.+/rcon.port=${rcon_port}/g" server.properties
 
 ## Turn RCON On
-# set the rcon password to the default
+# set the rcon password to the default if rcon-ignore is not set
-log "info" "Setting the RCON password..."
+if [[ "${rcon_ignore}" == 0 ]]; then
+  log "info" "Setting the RCON password..."
 
-default_rcon_password=""
+  [[ -z "${DEFAULT_RCON_PASSWORD}" ]] \
-[[ -z "${default_rcon_password}" ]] \
+    && log "warning" "No RCON password has been defined within $(basename "${0}"), consider generating one with \"openssl rand -base64 36\""
-  && log "error" "No RCON password has been defined within $(basename "${0}") -- exiting!" \
-    && exit 1
 
-sed -i "s/rcon.password=.+/rcon.password=${default_rcon_password}/g" server.properties \
+  sed -i "s/rcon.password=.+/rcon.password=${DEFAULT_RCON_PASSWORD}/g" server.properties \
-  && log "info" "RCON password set"
+    && log "info" "RCON password set"
+fi
 
+## Accept the eula
+sed -i "s/eula=false/eula=true/g" eula.txt \
+  && log "info" "Minecraft eula accepted"
 
+## Go ahead and start 'er on up
+
+tmux has-session -t "Minecraft-Server-${server_id}" > /dev/null 2>&1
+
+if [ "${?}" == 0 ]; then
+  log "warning" "That minecraft server is currently running"
+  confirmation "Would you like to kill it and then run the new one (y/N)?"
+  if [ "${?}" == 0 ]; then
+    log "info" "Ok, killing server..."
+    tmux kill-session -t "Minecraft-Server-${server_id}" \
+       && log "info" "Successfully killed the server"
+  else
+    log "info" "Not ending current Minecraft-Server-${server_id}, exiting..."
+    exit 0
+  fi
+fi
+
+log "info" \
+"Startup Arguments:
+  -Xms${INITIAL_MEM}G
+  -Xmx${MAX_MEM}G
+  -jar"
+
+log "info" "Starting Minecraft-Server-${server_id}"
+
+tmux new-session -d -s \
+  "Minecraft-Server-${server_id}" \
+    java -Xms"${INITIAL_MEM}G" -Xmx"${MAX_MEM}G" -jar server.jar --nogui \
+      && log "info" "Server Minecraft-Server-${server_id} started successfully!"