The /butcher command no longer kills mobs with a name tag.

This behaviour can be overridden with the new -t flag.
The -f flag encompasses this flag.

src/main/java/com/sk89q/worldedit/LocalWorld.java

@@ -53,7 +53,8 @@ public abstract class LocalWorld implements World {
         public static final int ANIMALS = 1 << 2;
         public static final int GOLEMS = 1 << 3;
         public static final int AMBIENT = 1 << 4;
-        public static final int FRIENDLY = PETS | NPCS | ANIMALS | GOLEMS | AMBIENT;
+        public static final int TAGGED = 1 << 5;
+        public static final int FRIENDLY = PETS | NPCS | ANIMALS | GOLEMS | AMBIENT | TAGGED;
         public static final int WITH_LIGHTNING = 1 << 20;
     }
 

src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java

@@ -936,6 +936,7 @@ public class BukkitWorld extends LocalWorld {
         boolean withLightning = (flags & KillFlags.WITH_LIGHTNING) != 0;
         boolean killGolems = (flags & KillFlags.GOLEMS) != 0;
         boolean killAmbient = (flags & KillFlags.AMBIENT) != 0;
+        boolean killTagged = (flags & KillFlags.TAGGED) != 0;
 
         int num = 0;
         double radiusSq = radius * radius;
@@ -967,6 +968,10 @@ public class BukkitWorld extends LocalWorld {
                 continue;
             }
 
+            if (!killTagged && isTagged(ent)) {
+                continue;
+            }
+
             if (radius < 0 || bukkitOrigin.distanceSquared(ent.getLocation()) <= radiusSq) {
                 if (withLightning) {
                     world.strikeLightningEffect(ent.getLocation());
@@ -979,6 +984,10 @@ public class BukkitWorld extends LocalWorld {
         return num;
     }
 
+    private static boolean isTagged(LivingEntity ent) {
+        return ent.getCustomName() != null;
+    }
+
     /**
      * Remove entities in an area.
      *

src/main/java/com/sk89q/worldedit/commands/BrushCommands.java

@@ -281,6 +281,7 @@ public class BrushCommands {
             flags.or(KillFlags.GOLEMS        , flagString.contains("g"), "worldedit.butcher.golems");
             flags.or(KillFlags.ANIMALS       , flagString.contains("a"), "worldedit.butcher.animals");
             flags.or(KillFlags.AMBIENT       , flagString.contains("b"), "worldedit.butcher.ambient");
+            flags.or(KillFlags.TAGGED        , flagString.contains("t"), "worldedit.butcher.tagged");
             flags.or(KillFlags.WITH_LIGHTNING, flagString.contains("l"), "worldedit.butcher.lightning");
         }
         BrushTool tool = session.getBrushTool(player.getItemInHand());

src/main/java/com/sk89q/worldedit/commands/UtilityCommands.java

@@ -345,7 +345,7 @@ public class UtilityCommands {
     @Command(
         aliases = { "butcher" },
         usage = "[radius]",
-        flags = "plangbf",
+        flags = "plangbtf",
         desc = "Kill all or nearby mobs",
         help =
             "Kills nearby mobs, based on radius, if none is given uses default in configuration.\n" +
@@ -355,6 +355,7 @@ public class UtilityCommands {
             "  -g also kills Golems.\n" +
             "  -a also kills animals.\n" +
             "  -b also kills ambient mobs.\n" +
+            "  -t also kills mobs with name tags.\n" +
             "  -f compounds all previous flags.\n" +
             "  -l strikes lightning on each killed mob.",
         min = 0,
@@ -390,6 +391,7 @@ public class UtilityCommands {
         flags.or(KillFlags.GOLEMS        , args.hasFlag('g'), "worldedit.butcher.golems");
         flags.or(KillFlags.ANIMALS       , args.hasFlag('a'), "worldedit.butcher.animals");
         flags.or(KillFlags.AMBIENT       , args.hasFlag('b'), "worldedit.butcher.ambient");
+        flags.or(KillFlags.TAGGED        , args.hasFlag('t'), "worldedit.butcher.tagged");
         flags.or(KillFlags.WITH_LIGHTNING, args.hasFlag('l'), "worldedit.butcher.lightning");
         // If you add flags here, please add them to com.sk89q.worldedit.commands.BrushCommands.butcherBrush() as well