Added Instancing support through CLAs and ENV. (#80)

StarMap.Core/ModRepository/ModLoader.cs

@@ -1,6 +1,7 @@
 using KSA;
 using StarMap.API;
 using StarMap.Core.Config;
+using StarMap.Core.Patches;
 using System.Reflection;
 using System.Runtime.Loader;
 using Tomlet;
@@ -44,6 +45,7 @@ public ModLoader(AssemblyLoadContext coreAssemblyLoadContext)
 
         public void Init()
         {
+            DocumentsPathPatches.Apply();
             PrepareMods();
         }
 
@@ -60,7 +62,7 @@ private void PrepareMods()
             {
                 if (!mod.Enabled)
                 {
-                    Console.WriteLine($"StarMap - Not loading mod: {mod.Id} because it is disable in manifest");
+                    Console.WriteLine($"StarMap - Not loading mod: {mod.Id} because it is disabled in manifest");
                     continue;
                 }
 

StarMap.Core/Patches/DocumentsPathPatches.cs

@@ -0,0 +1,47 @@
+using HarmonyLib;
+using KSA;
+
+namespace StarMap.Core.Patches
+{
+    internal static class DocumentsPathPatches
+    {
+        private const string CliFlag = "-InstancePath";
+        private const string EnvVarName = "STARMAP_INSTANCE_PATH";
+        private const string HarmonyId = "com.starmap.core.documentspathoverride";
+
+        public static void Apply()
+        {
+            // Check if an override path is provided via command-line argument or environment variable
+            var overridePath = TryGetOverride();
+            if (string.IsNullOrEmpty(overridePath))
+                return;
+
+            // Apply the Harmony patch to override the DocumentsFolderPath property
+            var harmony = new Harmony(HarmonyId);
+            var original = AccessTools.PropertyGetter(typeof(Constants), nameof(Constants.DocumentsFolderPath));
+            var prefix = new HarmonyMethod(typeof(DocumentsPathPatches), nameof(Prefix));
+            harmony.Patch(original, prefix: prefix);
+            Console.WriteLine($"StarMap - Using Instance Path: {overridePath}");
+        }
+
+        private static bool Prefix(ref string __result)
+        {
+            __result = TryGetOverride()!;
+            return false;
+        }
+
+        private static string? TryGetOverride()
+        {
+            var args = Environment.GetCommandLineArgs();
+            for (int i = 0; i < args.Length - 1; i++)
+            {
+                if (string.Equals(args[i], CliFlag, StringComparison.OrdinalIgnoreCase))
+                {
+                    return args[i + 1];
+                }
+            }
+
+            return Environment.GetEnvironmentVariable(EnvVarName);
+        }
+    }
+}

StarMap.Core/StarMapCore.cs

@@ -9,7 +9,7 @@ internal class StarMapCore : IStarMapCore
     {
         public static StarMapCore? Instance;
 
-        private readonly Harmony _harmony = new("StarMap.Core");
+        private readonly Harmony _harmony = new("com.starmap.core");
         private readonly AssemblyLoadContext _coreAssemblyLoadContext;
 
         private readonly ModLoader _loader;