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# KBackup-Fabric
A simple backup mod for fabric Minecraft server.
Minecraft version: 1.14.4
[Fabric API](https://minecraft.curseforge.com/projects/fabric/files) is required!
## 1. Commands
- **/kb** or **/kb help**: show command list
- **/kb list**: show existing backups
- **/kb backup \[backup_name\]**: make a backup with given name or the current system time by default
- **/kb restore \<backup_name\>**: restore to a certain backup. This command needs a confirm to execute.
- **/kb confirm**: confirm executing restore operation. The operation is irreversible.
- **/kb delete**: delete an existing backup.
- **/kb prev**: Find and select the most recent backup file.
## 2. Script for auto-restart after restoring
Due to the nature of JVM: the Java language's running environment, there is no elegant way to restart Minecraft server in a server plugin. In order to achieve auto restarting, the outer system-based script is required, i.e the script is a batch or a shell script.
KBackup exit JVM with a special code `111` after restoring the level successfully. The startup script just check the exit code and restart Minecraft server if the code is `111`.
I will give examples for some popular operating systems. To use these scripts, you should replace your start.bat or start.sh script with given code lines.
### 2.1 Script for Windows
```batch
@echo off
title Keuin's personal Minecraft server
:loop
java -Xms4G -Xmx4G -jar fabric-server-launch.jar nogui
if %errorlevel%==111 goto loop
rem kbackup restore auto restart
pause
```
### 2.2 Script for Linux or U\*ix using shell
```shell
#!/bin/sh
STATUS=111
while [ $STATUS -eq 111 ]
do
java -Xms4G -Xmx4G -jar fabric-server-launch.jar nogui
STATUS=$?
done
```
## 3. To-Do List:
- New version checker.
- Refactor code.
- More thorough test.
- Implement incremental backup.
+ Restore: trace-back (recursively, then generate file dependence tree)
- Implement unZipRecursively (unzip a .zip.inc file recursively until reaches the root (i.e. the last full backup).)
+ Backup: base-diff (select most recently backup as the base, then diff)
- Implement zipDiff (make a new zip with the latest backup as the base, store diff-table in zip comment (A:Add, M:Modification, D:Deletion))
- Optimize help menu. (colored command help menu)
- Add op login hint in the next start after restoring.
- Implement incremental backup.
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