Added Rule: giveCommandDupeFix

README.md

@@ -242,6 +242,14 @@ Fixes being able to fish outside of water
 * Categories: `CARPETFIXES`,`BUGFIX`
 * Fixes: [MC-175544](https://bugs.mojang.com/browse/MC-175544)
 
+## giveCommandDupeFix
+Fixes being able to dupe items using the /give command
+* Type: `boolean`
+* Default value: `false`
+* Required options: `false`,`true`
+* Categories: `CARPETFIXES`,`BUGFIX`
+* Fixes: [MC-120507](https://bugs.mojang.com/browse/MC-120507)
+
 ## drownedEnchantedTridentsFix
 Makes enchantments work on tridents thrown by drowned
 * Type: `boolean`

src/main/java/carpetfixes/CarpetFixesSettings.java

@@ -302,6 +302,14 @@ public enum PresetSettings {
     )
     public static boolean fishingOutsideWaterFix = false;
 
+    //by FX - PR0CESS
+    @Rule(
+            desc = "Fixes being able to dupe items using the /give command",
+            extra = "Fixes [MC-120507](https://bugs.mojang.com/browse/MC-120507)",
+            category = {CARPETFIXES,BUGFIX}
+    )
+    public static boolean giveCommandDupeFix = false;
+
     /*
 
     BACKPORTS

src/main/java/carpetfixes/mixins/dupeFixes/HopperBlockEntity_giveMixin.java

@@ -0,0 +1,21 @@
+package carpetfixes.mixins.dupeFixes;
+
+import carpetfixes.CarpetFixesSettings;
+import net.minecraft.block.entity.HopperBlockEntity;
+import net.minecraft.entity.ItemEntity;
+import net.minecraft.inventory.Inventory;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(HopperBlockEntity.class)
+public class HopperBlockEntity_giveMixin {
+
+    @Inject(method="extract(Lnet/minecraft/inventory/Inventory;Lnet/minecraft/entity/ItemEntity;)Z",at=@At("HEAD"),cancellable = true)
+    private static void extract(Inventory inventory, ItemEntity itemEntity, CallbackInfoReturnable<Boolean> cir) {
+        if (CarpetFixesSettings.giveCommandDupeFix && itemEntity.pickupDelay == 32767) {
+            cir.setReturnValue(true);
+        }
+    }
+}

src/main/resources/carpetfixes.accesswidener

@@ -1,2 +1,3 @@
 accessWidener	v1	named
 extendable class net/minecraft/entity/projectile/FishingBobberEntity$State
+accessible field net/minecraft/entity/ItemEntity pickupDelay I

src/main/resources/carpetfixes.mixins.json

@@ -22,6 +22,7 @@
     "coreSystemFixes.World_seaLevelMixin",
     "dupeFixes.AbstractRailBlock_duplicationMixin",
     "dupeFixes.FallingBlockEntity_duplicationMixin",
+    "dupeFixes.HopperBlockEntity_giveMixin",
     "dupeFixes.MobEntity_portalGeneralItemMixin",
     "dupeFixes.PistonBlock_tntDupingFixMixin",
     "entityFixes.CatEntity$SleepWithOwnerGoal_breakLeashMixin",