Added Instancing Support to StarMap using CLA and/or Environment Variables

StarMap.Core/ModRepository/DocumentsPathPatch.cs

@@ -0,0 +1,47 @@
+using HarmonyLib;
+using KSA;
+
+namespace StarMap.Core.ModRepository
+{
+    internal static class DocumentsPathPatch
+    {
+        private const string CliFlag = "-InstancePath";
+        private const string EnvVarName = "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(DocumentsPathPatch), 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/ModRepository/ModLoader.cs

@@ -44,6 +44,7 @@ public ModLoader(AssemblyLoadContext coreAssemblyLoadContext)
 
         public void Init()
         {
+            DocumentsPathPatch.Apply();
             PrepareMods();
         }
 
@@ -60,7 +61,7 @@ private void PrepareMods()
             {
                 if (!mod.Enabled)
                 {
-                    Console.WriteLine($"StarMap - Nod loading mod: {mod.Id} because it is disable in manifest");
+                    Console.WriteLine($"StarMap - Not loading mod: {mod.Id} because it is disabled in manifest");
                     continue;
                 }
 

StarMap.Loader/Program.cs

@@ -8,7 +8,9 @@ internal class Program
     {
         static void Main(string[] args)
         {
-            if (args.Length < 1)
+            var (instanceOverrideArgs, remainingArgs) = ExtractInstanceOverride(args);
+
+            if (remainingArgs.Length < 1)
             {
                 Console.WriteLine("StarMap - Running Starmap in solo mode!");
                 SoleModeInner();
@@ -17,12 +19,35 @@ static void Main(string[] args)
 
             Console.WriteLine("StarMap - Running Starmap in loader mode.");
 
-            var pipeName = args[0];
+            var pipeName = remainingArgs[0];
             Console.WriteLine($"StarMap - Connection to pipe: {pipeName}");
 
             MainInner(pipeName).GetAwaiter().GetResult();
         }
 
+        private static (string[] instanceOverrideArgs, string[] remainingArgs) ExtractInstanceOverride(string[] args)
+        {
+            const string CliFlag = "-InstancePath";
+
+            var remaining = new List<string>();
+            var extracted = new List<string>();
+
+            for (int i = 0; i < args.Length; i++)
+            {
+                if (string.Equals(args[i], CliFlag, StringComparison.OrdinalIgnoreCase) && i + 1 < args.Length)
+                {
+                    extracted.Add(args[i]);
+                    extracted.Add(args[i + 1]);
+                    i++; // skip the value too
+                    continue;
+                }
+
+                remaining.Add(args[i]);
+            }
+
+            return (extracted.ToArray(), remaining.ToArray());
+        }
+
         static void SoleModeInner()
         {
             var gameConfig = new LoaderConfig();