Ask the user if they want to continue launching, if update/install fails

src/main/kotlin/link/infra/packwiz/installer/Main.kt

@@ -60,7 +60,7 @@ class Main(args: Array<String>) {
 
 		val title = cmd.getOptionValue("title")
 		if (title != null) {
-			ui.setTitle(title)
+			ui.title = title
 		}
 
 		ui.show()

src/main/kotlin/link/infra/packwiz/installer/UpdateManager.kt

@@ -118,6 +118,7 @@ class UpdateManager internal constructor(private val opts: Options, val ui: IUse
 			gson.fromJson(FileReader(Paths.get(opts.packFolder, opts.manifestFile).toString()),
 					ManifestFile::class.java)
 		} catch (e: FileNotFoundException) {
+			ui.firstInstall = true
 			ManifestFile()
 		} catch (e: JsonSyntaxException) {
 			ui.showErrorAndExit("Invalid local manifest file, try deleting ${opts.manifestFile}", e)

src/main/kotlin/link/infra/packwiz/installer/ui/IUserInterface.kt

@@ -13,7 +13,7 @@ interface IUserInterface {
 	}
 	fun showErrorAndExit(message: String, e: Exception?): Nothing
 
-	fun setTitle(title: String) {}
+	var title: String
 	fun submitProgress(progress: InstallProgress)
 	// Return true if the installation was cancelled!
 	fun showOptions(options: List<IOptionDetails>): Boolean
@@ -33,4 +33,6 @@ interface IUserInterface {
 
 	var optionsButtonPressed: Boolean
 	var cancelButtonPressed: Boolean
+
+	var firstInstall: Boolean
 }

src/main/kotlin/link/infra/packwiz/installer/ui/cli/CLIHandler.kt

@@ -13,6 +13,10 @@ class CLIHandler : IUserInterface {
 	override var optionsButtonPressed = false
 	@Volatile
 	override var cancelButtonPressed = false
+	@Volatile
+	override var firstInstall = false
+
+	override var title: String = ""
 
 	override fun showErrorAndExit(message: String, e: Exception?): Nothing {
 		if (e != null) {

src/main/kotlin/link/infra/packwiz/installer/ui/gui/GUIHandler.kt

@@ -20,8 +20,14 @@ class GUIHandler : IUserInterface {
 	override var optionsButtonPressed = false
 	@Volatile
 	override var cancelButtonPressed = false
+	@Volatile
+	override var firstInstall = false
 
-	private var title = "Updating modpack..."
+	override var title = "packwiz-installer"
+		set(value) {
+			field = value
+			EventQueue.invokeLater { frmPackwizlauncher.title = value }
+		}
 
 	init {
 		EventQueue.invokeAndWait {
@@ -45,29 +51,41 @@ class GUIHandler : IUserInterface {
 	}
 
 	override fun showErrorAndExit(message: String, e: Exception?): Nothing {
+		val buttons = arrayOf("Quit", if (firstInstall) "Continue without installing" else "Continue without updating")
 		if (e != null) {
 			Log.fatal(message, e)
 			EventQueue.invokeAndWait {
-				JOptionPane.showMessageDialog(null,
+				val result = JOptionPane.showOptionDialog(frmPackwizlauncher,
 					"$message: $e",
-					title, JOptionPane.ERROR_MESSAGE)
+					title,
+					JOptionPane.YES_NO_OPTION, JOptionPane.ERROR_MESSAGE, null, buttons, buttons[0])
+				if (result == 1) {
+					Log.info("User selected to continue without installing/updating, exiting with code 0...")
+					exitProcess(0)
+				} else {
+					Log.info("User selected to quit, exiting with code 1...")
+					exitProcess(1)
+				}
 			}
 		} else {
 			Log.fatal(message)
 			EventQueue.invokeAndWait {
-				JOptionPane.showMessageDialog(null,
+				val result = JOptionPane.showOptionDialog(frmPackwizlauncher,
 					message,
-					title, JOptionPane.ERROR_MESSAGE)
+					title,
+					JOptionPane.YES_NO_OPTION, JOptionPane.ERROR_MESSAGE, null, buttons, buttons[0])
+				if (result == 1) {
+					Log.info("User selected to continue without installing/updating, exiting with code 0...")
+					exitProcess(0)
+				} else {
+					Log.info("User selected to quit, exiting with code 1...")
+					exitProcess(1)
+				}
 			}
 		}
 		exitProcess(1)
 	}
 
-	override fun setTitle(title: String) {
-		this.title = title
-		EventQueue.invokeLater { frmPackwizlauncher.title = title }
-	}
-
 	override fun submitProgress(progress: InstallProgress) {
 		val sb = StringBuilder()
 		if (progress.hasProgress) {