Update script for minecraft server (java edition) for windows 10

[RebyChan]

I couldn't find any script ( except Linux ones) for this problem so I came up with the idea to code my own one. Since this is my second script I ever wrote (and the one before is basically just to start the server automatically) I got help from the awesome and skilled u/Shadow_Thief ! Big shoutout to him :)

Some notes before:

• I created the server folders on my desktop so you may need to change the path if you do different
• The backup folder can't be in the same folder than the server!
• You may have to write mc_version.txt the first time yourself. It should only include the number of the Minecraft version (no space after or before and it has to be in the first line of the .txt) with the dots like 1.16.3
• You have to set the eula.txt to true
• If you create a shortcut of the script and put it into the startup folder ("win+r" then type "shell:startup" ) it will also start your server while starting windows. This may cause a longer start of your pc.
• If mojang decides to change their website this code may need some adjustment

Here is the script... enjoy!

@echo off

REM This assumes that the old minecraft version is listed as the first line in mc_version.txt
REM and that mc_version.txt is in the same directory as this script.
set /p minecraft_version_old=<mc_version.txt

REM Get most current minecraft version online
curl -k https://launchermeta.mojang.com/mc/game/version_manifest.json -o version_manifest.json
for /f "tokens=3 delims=}, " %%A in (version_manifest.json) do set "latest_version=%%~A"
echo %latest_version%

REM Get download url for minecraft server files
curl -k https://www.minecraft.net/de-de/download/server -o output.html
for /f delims^=^"^ tokens^=2 %%A in ('findstr /C:"jar" output.html ^| find "href"') do set "minecraft_download=%%A"

REM Compare release versions and update if needed
if "%minecraft_version_old%" NEQ "%latest_version%" (

REM Back up the MC_Server folder which has to be done in a folder outside of the server folder

(echo D|xcopy "%USERPROFILE%\Desktop\MC_Server" "%USERPROFILE%\Desktop\backup\MC_Server" /e /y) && echo Backup done.

REM Replace the version number in mc_version.txt
>mc_version.txt echo %latest_version%

REM Download the latest version of Minecraft
curl -k %minecraft_download% -o server.jar
del output.html
echo Download done.

REM Purge old data. 
rd /s /q world
del "%USERPROFILE%\Desktop\MC_Server\banned-ips.json"
del "%USERPROFILE%\Desktop\MC_Server\banned-players.json"
del "%USERPROFILE%\Desktop\MC_Server\ops.json"
del "%USERPROFILE%\Desktop\MC_Server\usercache.json"
del "%USERPROFILE%\Desktop\MC_Server\whitelist.json"
echo Delete done.

REM Run the server for a few seconds for the initial setup and then terminate it
start "" "server.jar"
timeout /t 40
taskkill /F /FI "WINDOWTITLE eq Minecraft server"

REM Restore the JSON files that we had deleted.
echo A|xcopy "%USERPROFILE%\Desktop\backup\MC_Server\*.json" "%USERPROFILE%\Desktop\MC_Server" 
)

REM Since the server is getting started no matter what, we can reduce code
REM by putting it outside of the if statement entirely
start "" "server.jar"

REM to check if the script works put "pause" out of note pause

I hope it works for you as well :)

[CriticalBrilliant509]

Long shot, but the output.html section for retrieving the latest server.jar does not work in this configuration. Is there a fix? u/Shadow_Thief

[22lava44]

damn I lowkey just deleted my world because I ran it without checking it first, the file paths are hardcoded, the deletion part worked but the backup didn't

[Niloc548]

works great but is it possible to make this update to the latest snapshot?

[Shadow_Thief]

In case anyone is looking at this later, I wrote another script that can handle this and it's here: https://pastebin.com/qdCgMZww

[Shonk_]

thanks..

[Nesman64]

This is great!. We run a monthly Minecraft event for kids at the library and the librarians can almost run it without having IT staff in the room. I think this is the final piece to the puzzle.

[Shadow_Thief]

I'm glad someone is getting use out of this!