I am currently playing a server with my friends on the new Minecraft snapshot and I constantly have to update it because they release a new snapshot often. I was wondering if it was possible for every time I start the Minecraft server that it checks for a new version. If there is a new version, it downloads it and restarts the server.
Once you download it, you can extract the files in the zip file to the server directory, then every time you launch it, it'll update the file "minecraftsnapshotserver.jar" to the latest version.
If you launch the server through a bat file, you can edit it to look like this, and everytime you launch it, it'll check for updates and download the newest version (if there is any) and will launch that:
java -Xms1024M -Xmx2048M -jar minecraftsnapshotserver.jar nogui
Or if you want to rename the server before running it, (replace newnameoffile with what you want)
if exist newnameoffile.jar del newnameoffile.jar
ren minecraftsnapshotserver.jar newnameoffile.jar
java -Xms1024M -Xmx2048M -jar newnameoffile.jar nogui
Disclaimer: This software is developed, maintained and published by me.