From 93b45bffed67e1b318921ad40a8e889f488caa66 Mon Sep 17 00:00:00 2001
From: Toad-Dev <748280+toad-dev@users.noreply.github.com>
Date: Fri, 17 Dec 2021 10:39:16 -0800
Subject: [PATCH] Don't use apache commons-codec to encode NBT Hex.

Causes NoClassDefFoundError on dedicated server.

I did test this to make sure it output the same format as old
implementation (hex with lowercase alphas).
---
 .../java/dan200/computercraft/shared/util/NBTUtil.java | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/main/java/dan200/computercraft/shared/util/NBTUtil.java b/src/main/java/dan200/computercraft/shared/util/NBTUtil.java
index 9c30d5ce8..4b83fe47e 100644
--- a/src/main/java/dan200/computercraft/shared/util/NBTUtil.java
+++ b/src/main/java/dan200/computercraft/shared/util/NBTUtil.java
@@ -7,7 +7,6 @@ package dan200.computercraft.shared.util;
 
 import dan200.computercraft.ComputerCraft;
 import net.minecraft.nbt.*;
-import org.apache.commons.codec.binary.Hex;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
@@ -177,7 +176,7 @@ public final class NBTUtil
             DataOutput output = new DataOutputStream( new DigestOutputStream( digest ) );
             NbtIo.write( tag, output );
             byte[] hash = digest.digest();
-            return new String( Hex.encodeHex( hash ) );
+            return encodeHex( hash );
         }
         catch( NoSuchAlgorithmException | IOException e )
         {
@@ -186,6 +185,13 @@ public final class NBTUtil
         }
     }
 
+    private static String encodeHex( byte[] bytes )
+    {
+        StringBuilder result = new StringBuilder();
+        for ( byte b : bytes ) result.append( String.format( "%02x", b ) );
+        return result.toString();
+    }
+
     private static final class DigestOutputStream extends OutputStream
     {
         private final MessageDigest digest;