Added a command line option (-c, --config) to load a configuration file through the command line parameters

src/Ryujinx.UI.Common/Helper/CommandLineState.cs

@@ -1,5 +1,6 @@
 using Ryujinx.Common.Logging;
 using System.Collections.Generic;
+using System.IO;
 
 namespace Ryujinx.UI.Common.Helper
 {
@@ -16,6 +17,7 @@ namespace Ryujinx.UI.Common.Helper
         public static string LaunchPathArg { get; private set; }
         public static string LaunchApplicationId { get; private set; }
         public static bool StartFullscreenArg { get; private set; }
+        public static string OverrideConfigFile { get; private set; }
         public static bool HideAvailableUpdates { get; private set; }
 
         public static void ParseArguments(string[] args)
@@ -100,6 +102,29 @@ namespace Ryujinx.UI.Common.Helper
                     case "--software-gui":
                         OverrideHardwareAcceleration = false;
                         break;
+                    case "-c":
+                    case "--config":
+                        if (i + 1 >= args.Length)
+                        {
+                            Logger.Error?.Print(LogClass.Application, $"Invalid option '{arg}'");
+
+                            continue;
+                        }
+
+                        string configFile = args[++i];
+
+                        if (Path.GetExtension(configFile).ToLower() != ".json")
+                        {
+                            Logger.Error?.Print(LogClass.Application, $"Invalid option '{arg}'");
+
+                            continue;
+                        }
+
+                        OverrideConfigFile = configFile;
+
+                        arguments.Add(arg);
+                        arguments.Add(args[i]);
+                        break;
                     default:
                         LaunchPathArg = arg;
                         break;

src/Ryujinx/Program.cs

@@ -151,6 +151,11 @@ namespace Ryujinx.Ava
                 ConfigurationPath = appDataConfigurationPath;
             }
 
+            if (!string.IsNullOrEmpty(CommandLineState.OverrideConfigFile) && File.Exists(CommandLineState.OverrideConfigFile))
+            {
+                ConfigurationPath = CommandLineState.OverrideConfigFile;
+            }
+
             if (ConfigurationPath == null)
             {
                 // No configuration, we load the default values and save it to disk