feature: get CoW info with command `/kb cow-info`

2 files changed, 15 insertions, 0 deletions

diff --git a/src/main/java/com/keuin/kbackupfabric/KBCommandsRegister.java b/src/main/java/com/keuin/kbackupfabric/KBCommandsRegister.java
index 5bf92e4..7e454d2 100644
--- a/src/main/java/com/keuin/kbackupfabric/KBCommandsRegister.java
+++ b/src/main/java/com/keuin/kbackupfabric/KBCommandsRegister.java
@@ -58,6 +58,10 @@ public final class KBCommandsRegister {
                         .requires(Permissions.require("kb.list", DEFAULT_REQUIRED_LEVEL))
                         .executes(KBCommands::list)));
 
+        dispatcher.register(CommandManager.literal("kb")
+                .then(CommandManager.literal("cow-info")
+                        .executes(KBCommands::cowInfo)));
+
         // register /kb delete [name] for deleting an existing backup. OP is required.
         dispatcher.register(CommandManager.literal("kb")
                 .then(CommandManager.literal("delete")
diff --git a/src/main/java/com/keuin/kbackupfabric/ui/KBCommands.java b/src/main/java/com/keuin/kbackupfabric/ui/KBCommands.java
index d23a6fd..0dff99a 100644
--- a/src/main/java/com/keuin/kbackupfabric/ui/KBCommands.java
+++ b/src/main/java/com/keuin/kbackupfabric/ui/KBCommands.java
@@ -14,6 +14,7 @@ import com.keuin.kbackupfabric.operation.backup.method.ConfiguredIncrementalBack
 import com.keuin.kbackupfabric.operation.backup.method.ConfiguredPrimitiveBackupMethod;
 import com.keuin.kbackupfabric.util.DateUtil;
 import com.keuin.kbackupfabric.util.PrintUtil;
+import com.keuin.kbackupfabric.util.cow.FileCowCopier;
 import com.mojang.brigadier.arguments.StringArgumentType;
 import com.mojang.brigadier.context.CommandContext;
 import net.minecraft.server.MinecraftServer;
@@ -75,6 +76,7 @@ public final class KBCommands {
         msgInfo(context, "/kb restore <backup_name> - Delete the whole current level and restore from given backup. /kb restore is identical with /kb list.");
         msgInfo(context, "/kb confirm - Confirm and start restoring.");
         msgInfo(context, "/kb cancel - Cancel the restoration to be confirmed. If cancelled, /kb confirm will not run.");
+        msgInfo(context, "/kb cow-info - Display copy-on-write support info (Experimental)");
         return SUCCESS;
     }
 
@@ -135,6 +137,15 @@ public final class KBCommands {
         return SUCCESS;
     }
 
+    public static int cowInfo(CommandContext<ServerCommandSource> context) {
+        try {
+            msgInfo(context, "KBackup-cow library version: " + FileCowCopier.getVersion());
+        } catch (Exception | UnsatisfiedLinkError ignored) {
+            msgErr(context, "KBackup-cow library is not loaded");
+        }
+        return SUCCESS;
+    }
+
     /**
      * Print backup information.
      *