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launcher: ClientPatcher handles steam_stub manifest block

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Per-version patcher zips now ship a Goldberg steam_api64.dll +
steam_appid.txt alongside the existing MelonLoader stuff. The
manifest's new steam_stub block describes where to install them:

- api_dll / api_dest: stub DLL location and target path under
  Rec Room root (typically Recroom_Release_Data/Plugins/...)
- api_backup_suffix: the original Valve DLL gets renamed to
  <dest> + suffix on first install; re-runs detect the existing
  backup and leave it alone so the real DLL is preserved
- appid_file / appid_value + appid_dest: writes a steam_appid.txt
  next to the exe so the stub knows what game ID to claim

Block is optional — manifests without steam_stub patch nothing
extra, preserving back-compat with pre-stub patcher zips.
This commit is contained in:
Alexa
2026-05-27 13:04:08 +03:00
parent 26786527cd
commit c366b6190a
1 changed files with 81 additions and 2 deletions
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launcher/Backend/ClientPatcher.cs
+81 -2
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@@ -24,7 +24,14 @@ namespace DorkNet.Launcher.Backend;
/// "plugin_dest": "MelonLoader/Mods", // optional — defaults to "MelonLoader/Mods"
/// "config_template": "dorknet-clientmod.json.template", // optional — rendered with {HOST}/{PHOTON_APPID}/{PHOTON_VOICE_APPID}
/// "config_dest": "MelonLoader/UserData/dorknet-clientmod.json", // optional — defaults shown
/// "old_plugin_paths": ["BepInEx/plugins/DorkNet.ClientPatch.dll"] // optional — deleted before install
/// "old_plugin_paths": ["BepInEx/plugins/DorkNet.ClientPatch.dll"], // optional — deleted before install
/// "steam_stub": { // optional — replaces Valve steam_api64.dll
/// "api_dll": "steam_api64.dll", // file in zip
/// "api_dest": "Recroom_Release_Data/Plugins/steam_api64.dll",
/// "api_backup_suffix": ".steam-original", // original is renamed to dll + suffix
/// "appid_file": "steam_appid.txt", // file in zip (or omit if appid_value set)
/// "appid_dest": "steam_appid.txt" // relative to Rec Room root
/// }
/// }
/// </code>
/// Config template placeholders: <c>{HOST}</c>, <c>{PHOTON_APPID}</c>,
@@ -119,7 +126,68 @@ public sealed class ClientPatcher
File.Copy(dllSrc, dllDest, overwrite: true);
log.AppendLine($"[patch] installed plugin: {Path.GetFileName(manifest.PluginDll)} → {pluginDestDir}");
// 4. Render the config template.
// 4. Replace Valve's steam_api64.dll with the bundled stub
// (Goldberg emulator) so the unwrapped exe runs without
// Steam loaded. Backs up the original next to the dest
// DLL with the configured suffix so users can revert.
if (manifest.SteamStub is { } stub && !string.IsNullOrEmpty(stub.ApiDll))
{
var stubSrc = Path.Combine(patcherDir, stub.ApiDll);
if (!File.Exists(stubSrc))
return PatchResult.Failure($"steam_stub.api_dll listed but missing on disk: {stubSrc}");
if (string.IsNullOrEmpty(stub.ApiDest))
return PatchResult.Failure("steam_stub.api_dest is required when steam_stub is set.");
var dllTarget = Path.Combine(recRoomRoot, stub.ApiDest.Replace('/', Path.DirectorySeparatorChar));
var dllTargetDir = Path.GetDirectoryName(dllTarget);
if (!string.IsNullOrEmpty(dllTargetDir)) Directory.CreateDirectory(dllTargetDir);
// Back up the original once. If a .steam-original already
// exists we assume a previous patch ran — leave it alone
// rather than clobber the actual Valve DLL with our stub.
var backupSuffix = string.IsNullOrEmpty(stub.ApiBackupSuffix)
? ".steam-original" : stub.ApiBackupSuffix;
var backupPath = dllTarget + backupSuffix;
if (File.Exists(dllTarget) && !File.Exists(backupPath))
{
File.Move(dllTarget, backupPath);
log.AppendLine($"[patch] backed up Valve steam_api64.dll → {Path.GetFileName(backupPath)}");
}
File.Copy(stubSrc, dllTarget, overwrite: true);
log.AppendLine($"[patch] installed Steam stub: {Path.GetFileName(dllTarget)}");
// appid_dest is required; appid source can be a literal
// value or a file in the zip — file wins if both set.
if (!string.IsNullOrEmpty(stub.AppidDest))
{
var appidTarget = Path.Combine(recRoomRoot,
stub.AppidDest.Replace('/', Path.DirectorySeparatorChar));
var appidTargetDir = Path.GetDirectoryName(appidTarget);
if (!string.IsNullOrEmpty(appidTargetDir)) Directory.CreateDirectory(appidTargetDir);
string appidContent;
if (!string.IsNullOrEmpty(stub.AppidFile))
{
var appidSrc = Path.Combine(patcherDir, stub.AppidFile);
if (!File.Exists(appidSrc))
return PatchResult.Failure($"steam_stub.appid_file listed but missing on disk: {appidSrc}");
appidContent = File.ReadAllText(appidSrc).Trim();
}
else if (!string.IsNullOrEmpty(stub.AppidValue))
{
appidContent = stub.AppidValue.Trim();
}
else
{
return PatchResult.Failure(
"steam_stub.appid_dest set without appid_file or appid_value to source the value from.");
}
File.WriteAllText(appidTarget, appidContent);
log.AppendLine($"[patch] wrote {Path.GetFileName(appidTarget)} ({appidContent})");
}
}
// 5. Render the config template.
if (!string.IsNullOrEmpty(manifest.ConfigTemplate))
{
var templatePath = Path.Combine(patcherDir, manifest.ConfigTemplate);
@@ -191,6 +259,17 @@ public sealed class ClientPatcher
[JsonPropertyName("config_template")] public string? ConfigTemplate { get; set; }
[JsonPropertyName("config_dest")] public string? ConfigDest { get; set; }
[JsonPropertyName("old_plugin_paths")] public string[]? OldPluginPaths { get; set; }
[JsonPropertyName("steam_stub")] public SteamStubBlock? SteamStub { get; set; }
}
private sealed class SteamStubBlock
{
[JsonPropertyName("api_dll")] public string? ApiDll { get; set; }
[JsonPropertyName("api_dest")] public string? ApiDest { get; set; }
[JsonPropertyName("api_backup_suffix")] public string? ApiBackupSuffix { get; set; }
[JsonPropertyName("appid_file")] public string? AppidFile { get; set; }
[JsonPropertyName("appid_value")] public string? AppidValue { get; set; }
[JsonPropertyName("appid_dest")] public string? AppidDest { get; set; }
}
}