implement commandline parsing

1 files changed, 84 insertions, 4 deletions

diff --git a/main.cpp b/main.cpp
index 6e840317..efabc20a 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,6 +1,7 @@
-
 /* Copyright 2013 MultiMC Contributors
  *
+ * Authors: Orochimarufan <orochimarufan.x3@gmail.com>
+ *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -14,26 +15,105 @@
  * limitations under the License.
  */
 
-#include "gui/mainwindow.h"
+#include <iostream>
+
 #include <QApplication>
+#include <QDir>
 
-#include "data/appsettings.h"
+#include "gui/mainwindow.h"
 
+#include "data/appsettings.h"
 #include "data/loginresponse.h"
 
+#include "util/cmdutils.h"
+
+using namespace Util::Commandline;
+
 int main(int argc, char *argv[])
 {
+    // initialize Qt
 	QApplication app(argc, argv);
 	app.setOrganizationName("Forkk");
 	app.setApplicationName("MultiMC 5");
-	
+
+    // Print app header
+    std::cout << "MultiMC 5" << std::endl;
+    std::cout << "(c) 2013 MultiMC contributors" << std::endl << std::endl;
+
+    // Commandline parsing
+    Parser parser(FlagStyle::GNU, ArgumentStyle::SpaceAndEquals);
+
+    // --help
+    parser.addSwitch("help");
+    parser.addShortOpt("help", 'h');
+    parser.addDocumentation("help", "displays help on command line parameters");
+    // --dir
+    parser.addOption("dir", app.applicationDirPath());
+    parser.addShortOpt("dir", 'd');
+    parser.addDocumentation("dir", "use the supplied directory as MultiMC root instead of the binary location (use '.' for current)");
+    // --update
+    parser.addOption("update");
+    parser.addShortOpt("update", 'u');
+    parser.addDocumentation("update", "replaces the given file with the running executable", "<path>");
+    // --quietupdate
+    parser.addSwitch("quietupdate");
+    parser.addShortOpt("quietupdate", 'U');
+    parser.addDocumentation("quietupdate", "doesn't restart MultiMC after installing updates");
+    // --launch
+    parser.addOption("launch");
+    parser.addShortOpt("launch", 'l');
+    parser.addDocumentation("launch", "tries to launch the given instance", "<inst>");
+
+    // parse the arguments
+    QHash<QString, QVariant> args;
+    try {
+        args = parser.parse(app.arguments());
+    } catch(ParsingError e) {
+        std::cerr << "CommandLineError: " << e.what() << std::endl;
+        return 1;
+    }
+
+    // display help and exit
+    if (args["help"].toBool()) {
+        std::cout << qPrintable(parser.compileHelp(app.arguments()[0]));
+        return 0;
+    }
+
+    // update
+    // Note: cwd is always the current executable path!
+    if (!args["update"].isNull())
+    {
+        std::cout << "Performing MultiMC update: " << qPrintable(args["update"].toString()) << std::endl;
+        QDir::setCurrent(app.applicationDirPath());
+        QFile file(app.applicationFilePath());
+        file.copy(args["update"].toString());
+        if(args["quietupdate"].toBool())
+            return 0;
+    }
+
+    // change directory
+    QDir::setCurrent(args["dir"].toString());
+
+    // launch instance.
+    if (!args["launch"].isNull())
+    {
+        std::cout << "Launching instance: " << qPrintable(args["launch"].toString()) << std::endl;
+        // TODO: make it launch the an instance.
+        // needs the new instance model to be complete
+        std::cerr << "Launching Instances is not implemented yet!" << std::endl;
+        return 255;
+    }
+
+    // load settings
 	settings = new AppSettings(&app);
 	
 	// Register meta types.
 	qRegisterMetaType<LoginResponse>("LoginResponse");
 	
+    // show window
 	MainWindow mainWin;
 	mainWin.show();
 	
+    // loop
 	return app.exec();
 }