Dynamically download H2

src/main/java/fr/xephi/authme/AuthMe.java

@@ -2,6 +2,7 @@ package fr.xephi.authme;
 
 import ch.jalu.injector.Injector;
 import ch.jalu.injector.InjectorBuilder;
+import com.alessiodp.libby.BukkitLibraryManager;
 import com.github.Anon8281.universalScheduler.UniversalScheduler;
 import com.github.Anon8281.universalScheduler.scheduling.schedulers.TaskScheduler;
 import fr.xephi.authme.api.v3.AuthMeApi;
@@ -143,6 +144,11 @@ public class AuthMe extends JavaPlugin {
         return scheduler;
     }
 
+    /**
+     * The library manager
+     */
+    public static BukkitLibraryManager libraryManager;
+
     /**
      * Method called when the server enables the plugin.
      */
@@ -151,6 +157,7 @@ public class AuthMe extends JavaPlugin {
         // Load the plugin version data from the plugin description file
         loadPluginInfo(getDescription().getVersion());
         scheduler = UniversalScheduler.getScheduler(this);
+        libraryManager = new BukkitLibraryManager(this);
 
         // Set the Logger instance and log file path
         ConsoleLogger.initialize(getLogger(), new File(getDataFolder(), LOG_FILENAME));

src/main/java/fr/xephi/authme/initialization/DataSourceProvider.java

@@ -1,5 +1,6 @@
 package fr.xephi.authme.initialization;
 
+import com.alessiodp.libby.Library;
 import fr.xephi.authme.ConsoleLogger;
 import fr.xephi.authme.data.auth.PlayerCache;
 import fr.xephi.authme.datasource.CacheDataSource;
@@ -21,6 +22,8 @@ import javax.inject.Provider;
 import java.io.File;
 import java.sql.SQLException;
 
+import static fr.xephi.authme.AuthMe.libraryManager;
+
 /**
  * Creates the AuthMe data source.
  */
@@ -78,8 +81,14 @@ public class DataSourceProvider implements Provider<DataSource> {
                 dataSource = new SQLite(settings, dataFolder);
                 break;
             case H2:
+                Library h2 = Library.builder()
+                    .groupId("com.h2database")
+                    .artifactId("h2")
+                    .version("2.2.224")
+                    .build();
+                libraryManager.addMavenCentral();
+                libraryManager.loadLibrary(h2);
                 dataSource = new H2(settings, dataFolder);
-                logger.warning("You are using H2 database, which is still in development!\nMake sure to backup and report any issues you encounter on GitHub!");
                 break;
             default:
                 throw new UnsupportedOperationException("Unknown data source type '" + dataSourceType + "'");