initial commit of update_minecraft.sh

lgsm/functions/update_minecraft.sh

@@ -0,0 +1,157 @@
+#!/bin/bash
+# LGSM update_minecraft.sh function
+# Author: Daniel Gibbs
+# Website: https://gameservermanagers.com
+# Description: Handles updating of minecraft servers.
+
+local commandname="UPDATE"
+local commandaction="Update"
+local function_selfname="$(basename $(readlink -f "${BASH_SOURCE[0]}"))"
+
+fn_update_dl(){
+	fn_fetch_file "https://s3.amazonaws.com/Minecraft.Download/versions/${availablebuild}/minecraft_server.${availablebuild}.jar" "${lgsmdir}/tmp" "minecraft_server.${availablebuild}.jar"
+	echo -e "copying to ${filesdir}...\c"
+	fn_script_log "Copying to ${filesdir}"
+	cp "${lgsmdir}/tmp/minecraft_server.${availablebuild}.jar" "${filesdir}/minecraft_server.jar"
+	local exitcode=$?
+	if [ ${exitcode} -eq 0 ]; then
+		fn_print_ok_eol_nl
+	else
+		fn_print_fail_eol_nl
+	fi
+}
+
+fn_update_currentbuild(){
+	# Gets current build info
+	# Checks if current build info is available. If it fails, then a server restart will be forced to generate logs.
+	if [ ! -f "${consolelogdir}/${servicename}-console.log" ]; then
+		fn_print_error "Checking for update: mojang.com"
+		sleep 1
+		fn_print_error_nl "Checking for update: mojang.com: No logs with server version found"
+		fn_script_log_error "Checking for update: mojang.com: No logs with server version found"
+		sleep 1
+		fn_print_info_nl "Checking for update: mojang.com: Forcing server restart"
+		fn_script_log_info "Checking for update: mojang.com: Forcing server restart"
+		sleep 1
+		exitbypass=1
+		command_stop.sh
+		exitbypass=1
+		command_start.sh
+		sleep 1
+		# Check again and exit on failure.
+		if [ ! -f "${consolelogdir}/${servicename}-console.log" ]; then
+			fn_print_fail_nl "Checking for update: mojang.com: Still No logs with server version found"
+			fn_script_log_fatal "Checking for update: mojang.com: Still No logs with server version found"
+			core_exit.sh
+		fi
+	fi
+
+	# Get current build from logs
+	currentbuild=$(cat "${filesdir}/logs/latest.log" 2> /dev/null | grep version | egrep -o '((\.)?[0-9]{1,3}){1,3}\.[0-9]{1,3}')
+	if [ -z "${currentbuild}" ]; then
+		fn_print_error_nl "Checking for update: mojang.com: Current build version not found"
+		fn_script_log_error "Checking for update: mojang.com: Current build version not found"
+		sleep 1
+		fn_print_info_nl "Checking for update: mojang.com: Forcing server restart"
+		fn_script_log_info "Checking for update: mojang.com: Forcing server restart"
+		exitbypass=1
+		command_stop.sh
+		exitbypass=1
+		command_start.sh
+		currentbuild=$(cat "${filesdir}/logs/latest.log" 2> /dev/null | grep version | egrep -o '((\.)?[0-9]{1,3}){1,3}\.[0-9]{1,3}')
+		if [ -z "${currentbuild}" ]; then
+			fn_print_fail_nl "Checking for update: mojang.com: Current build version still not found"
+			fn_script_log_fatal "Checking for update: mojang.com: Current build version still not found"
+			core_exit.sh
+		fi
+	fi
+}
+
+fn_update_availablebuild(){
+	# Gets latest build info.
+	availablebuild=$(curl -s "https://launchermeta.mojang.com/mc/game/version_manifest.json" | sed -e 's/^.*"release":"\([^"]*\)".*$/\1/')
+	sleep 1
+
+	# Checks if availablebuild variable has been set
+	if [ -z "${availablebuild}" ]; then
+		fn_print_fail "Checking for update: mojang.com"
+		sleep 1
+		fn_print_fail "Checking for update: mojang.com: Not returning version info"
+		fn_script_log_fatal "Failure! Checking for update: mojang.com: Not returning version info"
+		core_exit.sh
+	else
+		fn_print_ok_nl "Checking for update: mojang.com"
+		fn_script_log_pass "Checking for update: mojang.com"
+		sleep 1
+	fi
+}
+
+fn_update_compare(){
+	# Removes dots so if can compare version numbers
+	currentbuilddigit=$(echo "${currentbuild}"|tr -cd '[:digit:]')
+	availablebuilddigit=$(echo "${availablebuild}"|tr -cd '[:digit:]')
+
+	if [ "${currentbuilddigit}" -ne "${availablebuilddigit}" ]; then
+		echo -e "\n"
+		echo -e "Update available:"
+		sleep 1
+		echo -e "	Current build: ${red}${currentbuild}${default}"
+		echo -e "	Available build: ${green}${availablebuild}${default}"
+		echo -e ""
+		sleep 1
+		echo ""
+		echo -en "Applying update.\r"
+		sleep 1
+		echo -en "Applying update..\r"
+		sleep 1
+		echo -en "Applying update...\r"
+		sleep 1
+		echo -en "\n"
+		fn_script_log "Update available"
+		fn_script_log "Current build: ${currentbuild}"
+		fn_script_log "Available build: ${availablebuild}"
+		fn_script_log "${currentbuild} > ${availablebuild}"
+
+		unset updateonstart
+
+		check_status.sh
+		if [ "${status}" == "0" ]; then
+			fn_update_dl
+			exitbypass=1
+			command_start.sh
+			exitbypass=1
+			command_stop.sh
+		else
+			exitbypass=1
+			command_stop.sh
+			fn_update_dl
+			exitbypass=1
+			command_start.sh
+		fi
+		alert="update"
+		alert.sh
+	else
+		echo -e "\n"
+		echo -e "No update available:"
+		echo -e "	Current version: ${green}${currentbuild}${default}"
+		echo -e "	Available version: ${green}${availablebuild}${default}"
+		echo -e ""
+		fn_print_ok_nl "No update available"
+		fn_script_log_info "Current build: ${currentbuild}"
+		fn_script_log_info "Available build: ${availablebuild}"
+	fi
+}
+
+
+if [ "${installer}" == "1" ]; then
+	fn_update_availablebuild
+	fn_update_dl
+else
+	# Checks for server update from mojang.com.com
+	fn_print_dots "Checking for update: mojang.com.com"
+	fn_script_log_info "Checking for update: mojang.com.com"
+	sleep 1
+	fn_update_currentbuild
+	fn_update_availablebuild
+	fn_update_compare
+fi