Do not print stacktrace on known exceptions

src/main/java/moe/yushi/authlibinjector/AuthlibInjector.java

@@ -67,7 +67,7 @@ public final class AuthlibInjector {
 
 	private static AtomicBoolean booted = new AtomicBoolean(false);
 
-	public static void bootstrap(Consumer<ClassFileTransformer> transformerRegistry) {
+	public static void bootstrap(Consumer<ClassFileTransformer> transformerRegistry) throws InjectorInitializationException {
 		if (!booted.compareAndSet(false, true)) {
 			Logging.LAUNCH.info("Already started, skipping");
 			return;
@@ -79,7 +79,8 @@ public final class AuthlibInjector {
 		if (optionalConfig.isPresent()) {
 			transformerRegistry.accept(createTransformer(optionalConfig.get()));
 		} else {
-			Logging.LAUNCH.warning("No config available");
+			Logging.LAUNCH.severe("No config available");
+			throw new InjectorInitializationException();
 		}
 	}
 
@@ -107,7 +108,7 @@ public final class AuthlibInjector {
 				metadataResponse = asString(getURL(apiRoot));
 			} catch (IOException e) {
 				Logging.CONFIG.severe("Failed to fetch metadata: " + e);
-				throw new UncheckedIOException(e);
+				throw new InjectorInitializationException(e);
 			}
 
 		} else {
@@ -118,7 +119,7 @@ public final class AuthlibInjector {
 				Logging.CONFIG.severe("Unable to decode metadata: " + e + "\n"
 						+ "Encoded metadata:\n"
 						+ prefetched.get());
-				throw e;
+				throw new InjectorInitializationException(e);
 			}
 		}
 
@@ -128,10 +129,10 @@ public final class AuthlibInjector {
 		try {
 			configuration = YggdrasilConfiguration.parse(apiRoot, metadataResponse);
 		} catch (UncheckedIOException e) {
-			Logging.CONFIG.severe("Unable to parse metadata: " + e + "\n"
+			Logging.CONFIG.severe("Unable to parse metadata: " + e.getCause() + "\n"
 					+ "Raw metadata:\n"
 					+ metadataResponse);
-			throw e;
+			throw new InjectorInitializationException(e);
 		}
 		Logging.CONFIG.fine("Parsed metadata: " + configuration);
 		return of(configuration);

src/main/java/moe/yushi/authlibinjector/InjectorInitializationException.java

@@ -0,0 +1,19 @@
+package moe.yushi.authlibinjector;
+
+public class InjectorInitializationException extends RuntimeException {
+
+	public InjectorInitializationException() {
+	}
+
+	public InjectorInitializationException(String message, Throwable cause) {
+		super(message, cause);
+	}
+
+	public InjectorInitializationException(String message) {
+		super(message);
+	}
+
+	public InjectorInitializationException(Throwable cause) {
+		super(cause);
+	}
+}

src/main/java/moe/yushi/authlibinjector/javaagent/AuthlibInjectorPremain.java

@@ -6,6 +6,8 @@ import static moe.yushi.authlibinjector.AuthlibInjector.nonTransformablePackages
 import java.lang.instrument.Instrumentation;
 import java.util.Arrays;
 import java.util.logging.Level;
+
+import moe.yushi.authlibinjector.InjectorInitializationException;
 import moe.yushi.authlibinjector.util.Logging;
 
 public class AuthlibInjectorPremain {
@@ -17,6 +19,8 @@ public class AuthlibInjectorPremain {
 	public static void premain(String arg, Instrumentation instrumentation) {
 		try {
 			initInjector(arg, instrumentation, false);
+		} catch (InjectorInitializationException e) {
+			System.exit(1);
 		} catch (Throwable e) {
 			Logging.LAUNCH.log(Level.SEVERE, "An exception has occurred, exiting", e);
 			System.exit(1);
@@ -27,6 +31,8 @@ public class AuthlibInjectorPremain {
 		try {
 			Logging.LAUNCH.info("Launched from agentmain");
 			initInjector(arg, instrumentation, true);
+		} catch (InjectorInitializationException e) {
+			;
 		} catch (Throwable e) {
 			Logging.LAUNCH.log(Level.SEVERE, "An exception has occurred", e);
 		}