Add JarUtil/SelfUpdater error handling

core/src/main/java/com/seibel/distanthorizons/core/jar/JarUtils.java

@@ -19,6 +19,10 @@
 
 package com.seibel.distanthorizons.core.jar;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.jetbrains.annotations.Nullable;
+
 import java.io.*;
 import java.net.URI;
 import java.net.URISyntaxException;
@@ -34,12 +38,21 @@ import java.util.Objects;
  */
 public class JarUtils
 {
+	private static final Logger LOGGER = LogManager.getLogger();
+	
+	@Nullable
 	public static File jarFile = null;
 	
-	static {
-		try {
+	static 
+	{
+		try 
+		{
 			jarFile = new File(JarUtils.class.getProtectionDomain().getCodeSource().getLocation().toURI()); // Always safe
-		} catch (Exception e) { e.printStackTrace(); }
+		} 
+		catch (Exception e) 
+		{
+			LOGGER.warn("Unable to get jarFile, Error: "+e.getMessage(), e);
+		}
 	}
 	
 	

core/src/main/java/com/seibel/distanthorizons/core/jar/updater/SelfUpdater.java

@@ -104,7 +104,9 @@ public class SelfUpdater
 		// Some init stuff
 		// We use sha1 to check the version as our versioning system is different to the one on modrinth
 		if (!ModrinthGetter.init())
+		{
 			return false;
+		}
 		if (!ModrinthGetter.mcVersions.contains(mcVersion))
 		{
 			LOGGER.warn("Minecraft version ["+ mcVersion +"] is not findable on Modrinth, only findable versions are ["+ ModrinthGetter.mcVersions.toString() +"]");
@@ -113,7 +115,14 @@ public class SelfUpdater
 		
 		// Check the sha's of both our stuff
 		if (currentJarSha.equals(ModrinthGetter.getLatestShaForVersion(mcVersion)))
+		{
 			return false;
+		}
+		if (JarUtils.jarFile == null)
+		{
+			LOGGER.warn("Unable to get the DH jar file, self updating disabled.");
+			return false;
+		}
 		
 		
 		LOGGER.info("New version (" + ModrinthGetter.getLatestNameForVersion(mcVersion) + ") of " + ModInfo.READABLE_NAME + " is available");
@@ -300,6 +309,10 @@ public class SelfUpdater
 		{
 			return;
 		}
+		if (JarUtils.jarFile == null)
+		{
+			return;
+		}