Allow content bundles to be marked as "Server GC"

A content bundle (replay) can now specify "please use server GC thanks"

Also cleaned up the RedialApi env var clearing stuff a bit.

Launcher side of #177

SS14.Launcher.sln.DotSettings

@@ -1,4 +1,5 @@
 <wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=GC/@EntryIndexedValue">GC</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=OS/@EntryIndexedValue">OS</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=VM/@EntryIndexedValue">VM</s:String>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Avalonia/@EntryIndexedValue">True</s:Boolean>

SS14.Launcher/Models/Connector.cs

@@ -168,6 +168,9 @@ private async Task LaunchContentBundleInternal(IStorageFile file, CancellationTo
             //
 
             installation = await InstallContentBundleAsync(zipFile, zipHash, metadata, cancel);
+
+            if (metadata.ServerGC == true)
+                installation = installation with { ServerGC = true };
         }
 
         Log.Debug("Launching client");
@@ -467,6 +470,9 @@ private async Task<ContentLaunchInfo> InstallContentBundleAsync(
         EnvVar("DOTNET_TieredPGO", "1");
         EnvVar("DOTNET_ReadyToRun", "0");
 
+        if (launchInfo.ServerGC)
+            EnvVar("DOTNET_gcServer", "1");
+
         ConfigureMultiWindow(launchInfo, startInfo);
 
         // DON'T ENABLE THIS THE LOADER USES THE LAUNCHER .NET VERSION ALWAYS SO ROLLFORWARD SHOULDN'T BE SPECIFIED.
@@ -688,6 +694,7 @@ public ConnectException(ConnectionStatus status, Exception inner)
 }
 
 public sealed record ContentBundleMetadata(
+    [property: JsonPropertyName("server_gc")] bool? ServerGC,
     [property: JsonPropertyName("engine_version")] string EngineVersion,
     [property: JsonPropertyName("base_build")] ContentBundleBaseBuild? BaseBuild
 );

SS14.Launcher/Models/ContentLaunchInfo.cs

@@ -3,5 +3,5 @@
 /// <summary>
 /// Information loaded by the updater that we need to launch the game.
 /// </summary>
-public sealed record ContentLaunchInfo(long Version, (string Module, string Version)[] ModuleInfo);
+public sealed record ContentLaunchInfo(long Version, (string Module, string Version)[] ModuleInfo, bool ServerGC = false);
 

SS14.Loader/RedialApi.cs

@@ -10,6 +10,31 @@ namespace SS14.Loader;
 
 internal sealed class RedialApi : IRedialApi
 {
+    // We have to reset these env vars to avoid leaking through state on redial.
+    private static readonly string[] EnvVarsToClear = [
+        // Robust config
+        "ROBUST_AUTH_TOKEN",
+        "ROBUST_AUTH_USERID",
+        "ROBUST_AUTH_PUBKEY",
+        "ROBUST_AUTH_SERVER",
+
+        // Launcher config.
+        "SS14_LOADER_CONTENT_DB",
+        "SS14_LOADER_CONTENT_VERSION",
+        "SS14_DISABLE_SIGNING",
+        "SS14_LAUNCHER_PATH",
+        "SS14_LOG_CLIENT",
+
+        // .NET config
+        "DOTNET_MULTILEVEL_LOOKUP",
+
+        // .NET performance config.
+        "DOTNET_TieredPGO",
+        "DOTNET_TC_QuickJitForLoops",
+        "DOTNET_ReadyToRun",
+        "DOTNET_gcServer",
+    ];
+
     private readonly string _launcher;
 
     public RedialApi(string launcher)
@@ -35,9 +60,10 @@ public void Redial(Uri uri, string text = "")
             }
         };
 
-        startInfo.EnvironmentVariables.Remove("DOTNET_TieredPGO");
-        startInfo.EnvironmentVariables.Remove("DOTNET_TC_QuickJitForLoops");
-        startInfo.EnvironmentVariables.Remove("DOTNET_ReadyToRun");
+        foreach (var envVar in EnvVarsToClear)
+        {
+            startInfo.EnvironmentVariables.Remove(envVar);
+        }
 
         Process.Start(startInfo);
     }