Add resource (sql script) validation in Initializer.java

core/src/main/java/com/seibel/distanthorizons/core/Initializer.java

@@ -20,6 +20,7 @@
 package com.seibel.distanthorizons.core;
 
 import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
+import com.seibel.distanthorizons.core.sql.DatabaseUpdater;
 import com.seibel.distanthorizons.core.wrapperInterfaces.IWrapperFactory;
 import com.seibel.distanthorizons.coreapi.ModInfo;
 import com.seibel.distanthorizons.core.world.DhApiWorldProxy;
@@ -35,6 +36,8 @@ import net.jpountz.lz4.LZ4Compressor;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
+import java.io.InputStream;
+
 /** Handles first time Core setup. */
 public class Initializer
 {
@@ -57,6 +60,21 @@ public class Initializer
 			throw e;
 		}
 		
+		// confirm the resource directory is present
+		try
+		{
+			int scriptCount = DatabaseUpdater.getAutoUpdateScriptCount();
+			if (scriptCount == 0)
+			{
+				throw new NullPointerException("No auto update scripts found, but no error thrown. This might mean the script list file is corrupted or empty.");
+			}
+		}
+		catch (Exception e)
+		{
+			LOGGER.fatal("Critical programmer error: Can't read SQL Scripts resource folder is either missing or malformed. Error: [" + e.getMessage() + "].");
+			throw new RuntimeException(e);
+		}
+		
 		
 		
 		CompleteFullDataSourceLoader unused2 = new CompleteFullDataSourceLoader(); // Auto register into the loader system

core/src/main/java/com/seibel/distanthorizons/core/sql/DatabaseUpdater.java

@@ -222,6 +222,18 @@ public class DatabaseUpdater
 	
 	
 	
+	//====================//
+	// startup validation //
+	//====================//
+	
+	/** 
+	 * Can be used to confirm the auto update scripts are in their expected folder. 
+	 * Will throw an exception if the scripts are missing or malformed.
+	 */
+	public static int getAutoUpdateScriptCount() throws NullPointerException, IOException { return getAutoUpdateScripts().size(); }
+	
+	
+	
 	//================//
 	// helper classes //
 	//================//