Implement dalamud-platform launch argument (#1452)

* implement dalamud platform launch arg
* implement cross-platform gamePath fallback
* refactor platform detection heuristic
* add cross platform dalamud runtime detection

Dalamud.Boot/DalamudStartInfo.cpp

@@ -109,6 +109,7 @@ void from_json(const nlohmann::json& json, DalamudStartInfo& config) {
     config.PluginDirectory = json.value("PluginDirectory", config.PluginDirectory);
     config.AssetDirectory = json.value("AssetDirectory", config.AssetDirectory);
     config.Language = json.value("Language", config.Language);
+    config.Platform = json.value("Platform", config.Platform);
     config.GameVersion = json.value("GameVersion", config.GameVersion);
     config.TroubleshootingPackData = json.value("TroubleshootingPackData", std::string{});
     config.DelayInitializeMs = json.value("DelayInitializeMs", config.DelayInitializeMs);

Dalamud.Boot/DalamudStartInfo.h

@@ -47,6 +47,7 @@ struct DalamudStartInfo {
     std::string PluginDirectory;
     std::string AssetDirectory;
     ClientLanguage Language = ClientLanguage::English;
+    std::string Platform;
     std::string GameVersion;
     std::string TroubleshootingPackData;
     int DelayInitializeMs = 0;

Dalamud.Boot/utils.cpp

@@ -1,4 +1,5 @@
 #include "pch.h"
+#include "DalamudStartInfo.h"
 
 #include "utils.h"
 
@@ -584,6 +585,10 @@ std::vector<std::string> utils::get_env_list(const wchar_t* pcszName) {
     return res;
 }
 
+bool utils::is_running_on_wine() {
+    return g_startInfo.Platform != "WINDOWS";
+}
+
 std::filesystem::path utils::get_module_path(HMODULE hModule) {
     std::wstring buf(MAX_PATH, L'\0');
     while (true) {

Dalamud.Common/DalamudStartInfo.cs

@@ -1,3 +1,4 @@
+using System.Runtime.InteropServices;
 using Dalamud.Common.Game;
 using Newtonsoft.Json;
 
@@ -15,7 +16,7 @@ public record DalamudStartInfo
     /// </summary>
     public DalamudStartInfo()
     {
-        // ignored
+        this.Platform = OSPlatform.Create("UNKNOWN");
     }
 
     /// <summary>
@@ -58,6 +59,12 @@ public record DalamudStartInfo
     /// </summary>
     public ClientLanguage Language { get; set; } = ClientLanguage.English;
 
+    /// <summary>
+    /// Gets or sets the underlying platform<72>Dalamud runs on.
+    /// </summary>
+    [JsonConverter(typeof(OSPlatformConverter))]
+    public OSPlatform Platform { get; set; }
+
     /// <summary>
     /// Gets or sets the current game version code.
     /// </summary>

Dalamud.Common/OSPlatformConverter.cs

@@ -0,0 +1,78 @@
+using System.Runtime.InteropServices;
+using Newtonsoft.Json;
+
+namespace Dalamud.Common;
+
+/// <summary>
+/// Converts a <see cref="OSPlatform"/> to and from a string (e.g. <c>"FreeBSD"</c>).
+/// </summary>
+public sealed class OSPlatformConverter : JsonConverter
+{
+    /// <summary>
+    /// Writes the JSON representation of the object.
+    /// </summary>
+    /// <param name="writer">The <see cref="JsonWriter"/> to write to.</param>
+    /// <param name="value">The value.</param>
+    /// <param name="serializer">The calling serializer.</param>
+    public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
+    {
+        if (value == null)
+        {
+            writer.WriteNull();
+        }
+        else if (value is OSPlatform)
+        {
+            writer.WriteValue(value.ToString());
+        }
+        else
+        {
+            throw new JsonSerializationException("Expected OSPlatform object value");
+        }
+    }
+
+    /// <summary>
+    /// Reads the JSON representation of the object.
+    /// </summary>
+    /// <param name="reader">The <see cref="JsonReader"/> to read from.</param>
+    /// <param name="objectType">Type of the object.</param>
+    /// <param name="existingValue">The existing property value of the JSON that is being converted.</param>
+    /// <param name="serializer">The calling serializer.</param>
+    /// <returns>The object value.</returns>
+    public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
+    {
+        if (reader.TokenType == JsonToken.Null)
+        {
+            return null;
+        }
+        else
+        {
+            if (reader.TokenType == JsonToken.String)
+            {
+                try
+                {
+                    return OSPlatform.Create((string)reader.Value!);
+                }
+                catch (Exception ex)
+                {
+                    throw new JsonSerializationException($"Error parsing OSPlatform string: {reader.Value}", ex);
+                }
+            }
+            else
+            {
+                throw new JsonSerializationException($"Unexpected token or value when parsing OSPlatform. Token: {reader.TokenType}, Value: {reader.Value}");
+            }
+        }
+    }
+
+    /// <summary>
+    /// Determines whether this instance can convert the specified object type.
+    /// </summary>
+    /// <param name="objectType">Type of the object.</param>
+    /// <returns>
+    /// <c>true</c> if this instance can convert the specified object type; otherwise, <c>false</c>.
+    /// </returns>
+    public override bool CanConvert(Type objectType)
+    {
+        return objectType == typeof(OSPlatform);
+    }
+}

Dalamud.Injector/EntryPoint.cs

@@ -263,6 +263,35 @@ namespace Dalamud.Injector
             }
         }
 
+        private static OSPlatform DetectPlatformHeuristic()
+        {
+            var ntdll = NativeFunctions.GetModuleHandleW("ntdll.dll");
+            var wineServerCallPtr = NativeFunctions.GetProcAddress(ntdll, "wine_server_call");
+            var wineGetHostVersionPtr = NativeFunctions.GetProcAddress(ntdll, "wine_get_host_version");
+            var winePlatform = GetWinePlatform(wineGetHostVersionPtr);
+            var isWine = wineServerCallPtr != nint.Zero;
+
+            static unsafe string? GetWinePlatform(nint wineGetHostVersionPtr)
+            {
+                if (wineGetHostVersionPtr == nint.Zero) return null;
+
+                var methodDelegate = (delegate* unmanaged[Fastcall]<out char*, out char*, void>)wineGetHostVersionPtr;
+                methodDelegate(out var platformPtr, out var _);
+
+                if (platformPtr == null) return null;
+
+                return Marshal.PtrToStringAnsi((nint)platformPtr);
+            }
+
+            if (!isWine)
+                return OSPlatform.Windows;
+
+            if (winePlatform == "Darwin")
+                return OSPlatform.OSX;
+
+            return OSPlatform.Linux;
+        }
+
         private static DalamudStartInfo ExtractAndInitializeStartInfoFromArguments(DalamudStartInfo? startInfo, List<string> args)
         {
             int len;
@@ -278,6 +307,7 @@ namespace Dalamud.Injector
             var logName = startInfo.LogName;
             var logPath = startInfo.LogPath;
             var languageStr = startInfo.Language.ToString().ToLowerInvariant();
+            var platformStr = startInfo.Platform.ToString().ToLowerInvariant();
             var unhandledExceptionStr = startInfo.UnhandledException.ToString().ToLowerInvariant();
             var troubleshootingData = "{\"empty\": true, \"description\": \"No troubleshooting data supplied.\"}";
 
@@ -307,6 +337,10 @@ namespace Dalamud.Injector
                 {
                     languageStr = args[i][key.Length..].ToLowerInvariant();
                 }
+                else if (args[i].StartsWith(key = "--dalamud-platform="))
+                {
+                    platformStr = args[i][key.Length..].ToLowerInvariant();
+                }
                 else if (args[i].StartsWith(key = "--dalamud-tspack-b64="))
                 {
                     troubleshootingData = Encoding.UTF8.GetString(Convert.FromBase64String(args[i][key.Length..]));
@@ -378,11 +412,35 @@ namespace Dalamud.Injector
                 throw new CommandLineException($"\"{languageStr}\" is not a valid supported language.");
             }
 
+            OSPlatform platform;
+            if (platformStr[0..(len = Math.Min(platformStr.Length, (key = "win").Length))] == key[0..len]) // covers both win32 and Windows
+            {
+                platform = OSPlatform.Windows;
+            }
+            else if (platformStr[0..(len = Math.Min(platformStr.Length, (key = "linux").Length))] == key[0..len])
+            {
+                platform = OSPlatform.Linux;
+            }
+            else if (platformStr[0..(len = Math.Min(platformStr.Length, (key = "macos").Length))] == key[0..len])
+            {
+                platform = OSPlatform.OSX;
+            }
+            else if (platformStr[0..(len = Math.Min(platformStr.Length, (key = "osx").Length))] == key[0..len])
+            {
+                platform = OSPlatform.OSX;
+            }
+            else
+            {
+                platform = DetectPlatformHeuristic();
+                Log.Warning("Heuristically determined host system platform as {platform}", platform);
+            }
+
             startInfo.WorkingDirectory = workingDirectory;
             startInfo.ConfigurationPath = configurationPath;
             startInfo.PluginDirectory = pluginDirectory;
             startInfo.AssetDirectory = assetDirectory;
             startInfo.Language = clientLanguage;
+            startInfo.Platform = platform;
             startInfo.DelayInitializeMs = delayInitializeMs;
             startInfo.GameVersion = null;
             startInfo.TroubleshootingPackData = troubleshootingData;
@@ -465,7 +523,7 @@ namespace Dalamud.Injector
             }
 
             Console.WriteLine("Specifying dalamud start info: [--dalamud-working-directory=path] [--dalamud-configuration-path=path]");
-            Console.WriteLine("                               [--dalamud-plugin-directory=path]");
+            Console.WriteLine("                               [--dalamud-plugin-directory=path] [--dalamud-platform=win32|linux|macOS]");
             Console.WriteLine("                               [--dalamud-asset-directory=path] [--dalamud-delay-initialize=0(ms)]");
             Console.WriteLine("                               [--dalamud-client-language=0-3|j(apanese)|e(nglish)|d|g(erman)|f(rench)]");
 
@@ -732,15 +790,42 @@ namespace Dalamud.Injector
             {
                 try
                 {
-                    var appDataDir = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
-                    var xivlauncherDir = Path.Combine(appDataDir, "XIVLauncher");
-                    var launcherConfigPath = Path.Combine(xivlauncherDir, "launcherConfigV3.json");
-                    gamePath = Path.Combine(JsonSerializer.CreateDefault().Deserialize<Dictionary<string, string>>(new JsonTextReader(new StringReader(File.ReadAllText(launcherConfigPath))))["GamePath"], "game", "ffxiv_dx11.exe");
-                    Log.Information("Using game installation path configuration from from XIVLauncher: {0}", gamePath);
+                    if (dalamudStartInfo.Platform == OSPlatform.Windows)
+                    {
+                        var appDataDir = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
+                        var xivlauncherDir = Path.Combine(appDataDir, "XIVLauncher");
+                        var launcherConfigPath = Path.Combine(xivlauncherDir, "launcherConfigV3.json");
+                        gamePath = Path.Combine(
+                            JsonSerializer.CreateDefault()
+                                .Deserialize<Dictionary<string, string>>(
+                                    new JsonTextReader(new StringReader(File.ReadAllText(launcherConfigPath))))["GamePath"],
+                            "game",
+                            "ffxiv_dx11.exe");
+                        Log.Information("Using game installation path configuration from from XIVLauncher: {0}", gamePath);
+                    }
+                    else if (dalamudStartInfo.Platform == OSPlatform.Linux)
+                    {
+                        var homeDir = $"Z:\\home\\{Environment.UserName}";
+                        var xivlauncherDir = Path.Combine(homeDir, ".xlcore");
+                        var launcherConfigPath = Path.Combine(xivlauncherDir, "launcher.ini");
+                        var config = File.ReadAllLines(launcherConfigPath)
+                            .Where(line => line.Contains('='))
+                            .ToDictionary(line => line.Split('=')[0], line => line.Split('=')[1]);
+                        gamePath = Path.Combine("Z:" + config["GamePath"].Replace('/', '\\'), "game", "ffxiv_dx11.exe");
+                        Log.Information("Using game installation path configuration from from XIVLauncher Core: {0}", gamePath);
+                    }
+                    else
+                    {
+                        var homeDir = $"Z:\\Users\\{Environment.UserName}";
+                        var xomlauncherDir = Path.Combine(homeDir, "Library", "Application Support", "XIV on Mac");
+                        // we could try to parse the binary plist file here if we really wanted to...
+                        gamePath = Path.Combine(xomlauncherDir, "ffxiv", "game", "ffxiv_dx11.exe");
+                        Log.Information("Using default game installation path from XOM: {0}", gamePath);
+                    }
                 }
                 catch (Exception)
                 {
-                    Log.Error("Failed to read launcherConfigV3.json to get the set-up game path, please specify one using -g");
+                    Log.Error("Failed to read launcher config to get the set-up game path, please specify one using -g");
                     return -1;
                 }
 
@@ -795,20 +880,6 @@ namespace Dalamud.Injector
             if (encryptArguments)
             {
                 var rawTickCount = (uint)Environment.TickCount;
-
-                if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
-                {
-                    [System.Runtime.InteropServices.DllImport("c")]
-#pragma warning disable SA1300
-                    static extern ulong clock_gettime_nsec_np(int clockId);
-#pragma warning restore SA1300
-
-                    const int CLOCK_MONOTONIC_RAW = 4;
-                    var rawTickCountFixed = clock_gettime_nsec_np(CLOCK_MONOTONIC_RAW) / 1000000;
-                    Log.Information("ArgumentBuilder::DeriveKey() fixing up rawTickCount from {0} to {1} on macOS", rawTickCount, rawTickCountFixed);
-                    rawTickCount = (uint)rawTickCountFixed;
-                }
-
                 var ticks = rawTickCount & 0xFFFF_FFFFu;
                 var key = ticks & 0xFFFF_0000u;
                 gameArguments.Insert(0, $"T={ticks}");

Dalamud.Injector/NativeFunctions.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Runtime.InteropServices;
 
 namespace Dalamud.Injector
@@ -910,5 +911,46 @@ namespace Dalamud.Injector
             uint dwDesiredAccess,
             [MarshalAs(UnmanagedType.Bool)] bool bInheritHandle,
             DuplicateOptions dwOptions);
+
+        /// <summary>
+        /// See https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-getmodulehandlew.
+        /// Retrieves a module handle for the specified module. The module must have been loaded by the calling process. To
+        /// avoid the race conditions described in the Remarks section, use the GetModuleHandleEx function.
+        /// </summary>
+        /// <param name="lpModuleName">
+        /// The name of the loaded module (either a .dll or .exe file). If the file name extension is omitted, the default
+        /// library extension .dll is appended. The file name string can include a trailing point character (.) to indicate
+        /// that the module name has no extension. The string does not have to specify a path. When specifying a path, be sure
+        /// to use backslashes (\), not forward slashes (/). The name is compared (case independently) to the names of modules
+        /// currently mapped into the address space of the calling process. If this parameter is NULL, GetModuleHandle returns
+        /// a handle to the file used to create the calling process (.exe file). The GetModuleHandle function does not retrieve
+        /// handles for modules that were loaded using the LOAD_LIBRARY_AS_DATAFILE flag.For more information, see LoadLibraryEx.
+        /// </param>
+        /// <returns>
+        /// If the function succeeds, the return value is a handle to the specified module. If the function fails, the return
+        /// value is NULL.To get extended error information, call GetLastError.
+        /// </returns>
+        [DllImport("kernel32.dll", CharSet = CharSet.Unicode, ExactSpelling = true, SetLastError = true)]
+        public static extern IntPtr GetModuleHandleW(string lpModuleName);
+
+        /// <summary>
+        /// Retrieves the address of an exported function or variable from the specified dynamic-link library (DLL).
+        /// </summary>
+        /// <param name="hModule">
+        /// A handle to the DLL module that contains the function or variable. The LoadLibrary, LoadLibraryEx, LoadPackagedLibrary,
+        /// or GetModuleHandle function returns this handle. The GetProcAddress function does not retrieve addresses from modules
+        /// that were loaded using the LOAD_LIBRARY_AS_DATAFILE flag.For more information, see LoadLibraryEx.
+        /// </param>
+        /// <param name="procName">
+        /// The function or variable name, or the function's ordinal value. If this parameter is an ordinal value, it must be
+        /// in the low-order word; the high-order word must be zero.
+        /// </param>
+        /// <returns>
+        /// If the function succeeds, the return value is the address of the exported function or variable. If the function
+        /// fails, the return value is NULL.To get extended error information, call GetLastError.
+        /// </returns>
+        [DllImport("kernel32", CharSet = CharSet.Ansi, ExactSpelling = true, SetLastError = true)]
+        [SuppressMessage("Globalization", "CA2101:Specify marshaling for P/Invoke string arguments", Justification = "Ansi only")]
+        public static extern IntPtr GetProcAddress(IntPtr hModule, string procName);
     }
 }

Dalamud/Configuration/Internal/EnvironmentConfiguration.cs

@@ -5,11 +5,6 @@ namespace Dalamud.Configuration.Internal;
 /// </summary>
 internal class EnvironmentConfiguration
 {
-    /// <summary>
-    /// Gets a value indicating whether the XL_WINEONLINUX setting has been enabled.
-    /// </summary>
-    public static bool XlWineOnLinux { get; } = GetEnvironmentVariable("XL_WINEONLINUX");
-
     /// <summary>
     /// Gets a value indicating whether the DALAMUD_NOT_HAVE_PLUGINS setting has been enabled.
     /// </summary>

Dalamud/EntryPoint.cs

@@ -182,6 +182,10 @@ public sealed class EntryPoint
             // Apply common fixes for culture issues
             CultureFixes.Apply();
           
+            // This is due to GitHub not supporting TLS 1.0, so we enable all TLS versions globally
+            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12 | SecurityProtocolType.Tls;
+
+            // Currently VEH is not fully functional on WINE
             if (!Util.IsWine())
                 InitSymbolHandler(info);
 

Dalamud/Utility/Util.cs

@@ -19,6 +19,7 @@ using Dalamud.Game.ClientState.Objects.SubKinds;
 using Dalamud.Game.ClientState.Objects.Types;
 using Dalamud.Interface.Colors;
 using Dalamud.Interface.Utility;
+using Dalamud.Logging.Internal;
 using Dalamud.Interface.Utility.Raii;
 using Dalamud.Support;
 using ImGuiNET;
@@ -500,55 +501,14 @@ public static class Util
     /// Determine if Dalamud is currently running within a Wine context (e.g. either on macOS or Linux). This method
     /// will not return information about the host operating system.
     /// </summary>
-    /// <returns>Returns true if Wine is detected, false otherwise.</returns>
-    public static bool IsWine()
-    {
-        if (EnvironmentConfiguration.XlWineOnLinux) return true;
-        if (Environment.GetEnvironmentVariable("XL_PLATFORM") is not null and not "Windows") return true;
-
-        var ntdll = NativeFunctions.GetModuleHandleW("ntdll.dll");
-
-        // Test to see if any Wine specific exports exist. If they do, then we are running on Wine.
-        // The exports "wine_get_version", "wine_get_build_id", and "wine_get_host_version" will tend to be hidden
-        // by most Linux users (else FFXIV will want a macOS license), so we will additionally check some lesser-known
-        // exports as well.
-        return AnyProcExists(
-            ntdll,
-            "wine_get_version",
-            "wine_get_build_id",
-            "wine_get_host_version",
-            "wine_server_call",
-            "wine_unix_to_nt_file_name");
-
-        bool AnyProcExists(nint handle, params string[] procs) =>
-            procs.Any(p => NativeFunctions.GetProcAddress(handle, p) != nint.Zero);
-    }
+    /// <returns>Returns true if running on Wine, false otherwise.</returns>
+    public static bool IsWine() => Service<Dalamud>.Get().StartInfo.Platform != OSPlatform.Windows;
 
     /// <summary>
-    /// Gets the best guess for the current host's platform based on the <c>XL_PLATFORM</c> environment variable or
-    /// heuristics.
+    /// Gets the current host's platform based on the injector launch arguments or heuristics.
     /// </summary>
-    /// <remarks>
-    /// macOS users running without <c>XL_PLATFORM</c> being set will be reported as Linux users. Due to the way our
-    /// Wines work, there isn't a great (consistent) way to split the two apart if we're not told.
-    /// </remarks>
     /// <returns>Returns the <see cref="OSPlatform"/> that Dalamud is currently running on.</returns>
-    public static OSPlatform GetHostPlatform()
-    {
-        switch (Environment.GetEnvironmentVariable("XL_PLATFORM"))
-        {
-            case "Windows": return OSPlatform.Windows;
-            case "MacOS": return OSPlatform.OSX;
-            case "Linux": return OSPlatform.Linux;
-        }
-
-        // n.b. we had some fancy code here to check if the Wine host version returned "Darwin" but apparently
-        // *all* our Wines report Darwin if exports aren't hidden. As such, it is effectively impossible (without some
-        // (very cursed and inaccurate heuristics) to determine if we're on macOS or Linux unless we're explicitly told
-        // by our launcher. See commit a7aacb15e4603a367e2f980578271a9a639d8852 for the old check.
-
-        return IsWine() ? OSPlatform.Linux : OSPlatform.Windows;
-    }
+    public static OSPlatform GetHostPlatform() => Service<Dalamud>.Get().StartInfo.Platform;
 
     /// <summary>
     /// Heuristically determine if the Windows version is higher than Windows 11's first build.

lib/CoreCLR/boot.cpp

@@ -3,6 +3,7 @@
 #include <cstdio>
 #include <filesystem>
 #include <Windows.h>
+#include <Lmcons.h>
 #include <Shlobj.h>
 #include "CoreCLR.h"
 #include "..\..\Dalamud.Boot\logging.h"
@@ -27,6 +28,64 @@ void ConsoleTeardown()
 
 std::optional<CoreCLR> g_clr;
 
+static wchar_t* GetRuntimePath()
+{
+    int result;
+    std::wstring buffer;
+    wchar_t* runtime_path;
+    wchar_t* _appdata;
+    DWORD username_len = UNLEN + 1;
+    wchar_t username[UNLEN + 1];
+
+    buffer.resize(0);
+    result = GetEnvironmentVariableW(L"DALAMUD_RUNTIME", &buffer[0], 0);
+
+    if (result)
+    {
+        buffer.resize(result); // The first pass returns the required length
+        result = GetEnvironmentVariableW(L"DALAMUD_RUNTIME", &buffer[0], result);
+        return _wcsdup(buffer.c_str());
+    }
+    
+    // Detect Windows first
+    result = SHGetKnownFolderPath(FOLDERID_RoamingAppData, KF_FLAG_DEFAULT, nullptr, &_appdata);
+
+    if (result != 0)
+    {
+        logging::E("Unable to get RoamingAppData path (err={})", result);
+        return NULL;
+    }
+
+    std::filesystem::path fs_app_data(_appdata);
+    runtime_path = _wcsdup(fs_app_data.append("XIVLauncher").append("runtime").c_str());
+    if (std::filesystem::exists(runtime_path))
+        return runtime_path;
+    free(runtime_path);
+
+    // Next XLCore on Linux
+    result = GetUserNameW(username, &username_len);
+    if (result != 0)
+    {
+        logging::E("Unable to get user name (err={})", result);
+        return NULL;
+    }
+
+    std::filesystem::path homeDir = L"Z:\\home\\" + std::wstring(username);
+    runtime_path = _wcsdup(homeDir.append(".xlcore").append("runtime").c_str());
+    if (std::filesystem::exists(runtime_path))
+        return runtime_path;
+    free(runtime_path);
+
+    // Finally XOM
+    homeDir = L"Z:\\Users\\" + std::wstring(username);
+    runtime_path = _wcsdup(homeDir.append("Library").append("Application Suppor").append("XIV on Mac").append("runtime").c_str());
+    if (std::filesystem::exists(runtime_path))
+        return runtime_path;
+    free(runtime_path);
+
+    return NULL;
+}
+
 HRESULT InitializeClrAndGetEntryPoint(
     void* calling_module,
     bool enable_etw,
@@ -62,31 +121,12 @@ HRESULT InitializeClrAndGetEntryPoint(
 
     SetEnvironmentVariable(L"COMPlus_ETWEnabled", enable_etw ? L"1" : L"0");
 
-    wchar_t* dotnet_path;
-    wchar_t* _appdata;
+    wchar_t* dotnet_path = GetRuntimePath();
 
-    std::wstring buffer;
-    buffer.resize(0);
-    result = GetEnvironmentVariableW(L"DALAMUD_RUNTIME", &buffer[0], 0);
-
-    if (result)
+    if (!dotnet_path || !std::filesystem::exists(dotnet_path))
     {
-        buffer.resize(result); // The first pass returns the required length
-        result = GetEnvironmentVariableW(L"DALAMUD_RUNTIME", &buffer[0], result);
-        dotnet_path = _wcsdup(buffer.c_str());
-    }
-    else
-    {
-        result = SHGetKnownFolderPath(FOLDERID_RoamingAppData, KF_FLAG_DEFAULT, nullptr, &_appdata);
-
-        if (result != 0)
-        {
-            logging::E("Unable to get RoamingAppData path (err={})", result);
-            return HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND);
-        }
-
-        std::filesystem::path fs_app_data(_appdata);
-        dotnet_path = _wcsdup(fs_app_data.append("XIVLauncher").append("runtime").c_str());
+        logging::E("Error: Unable to find .NET runtime path");
+        return 1;
     }
 
     // =========================================================================== //
@@ -95,12 +135,6 @@ HRESULT InitializeClrAndGetEntryPoint(
     logging::I("with config_path: {}", runtimeconfig_path);
     logging::I("with module_path: {}", module_path);
 
-    if (!std::filesystem::exists(dotnet_path))
-    {
-        logging::E("Error: Unable to find .NET runtime path");
-        return HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND);
-    }
-
     get_hostfxr_parameters init_parameters
     {
         sizeof(get_hostfxr_parameters),