Copy fake EpicGamesLauncher.exe for games flagged with env variable

Author: arielj

public/bin/EpicGamesLauncher.exe

@@ -93,6 +93,9 @@ const gogdlAuthConfig = join(app.getPath('userData'), 'gog_store', 'auth.json')
 const vulkanHelperBin = fixAsarPath(
   join(publicDir, 'bin', process.arch, process.platform, 'vulkan-helper')
 )
+const fakeEpicExePath = fixAsarPath(
+  join(publicDir, 'bin', 'EpicGamesLauncher.exe')
+)
 const icon = fixAsarPath(join(publicDir, 'icon.png'))
 const iconDark = fixAsarPath(join(publicDir, 'icon-dark.png'))
 const iconLight = fixAsarPath(join(publicDir, 'icon-light.png'))
@@ -240,6 +243,7 @@ export {
   nileLogFile,
   discordLink,
   execOptions,
+  fakeEpicExePath,
   fixAsarPath,
   configStore,
   configPath,

src/backend/constants.ts

@@ -1,4 +1,4 @@
-import { existsSync } from 'graceful-fs'
+import { copyFileSync, existsSync } from 'graceful-fs'
 import axios from 'axios'
 
 import {
@@ -40,7 +40,8 @@ import {
   configStore,
   isCLINoGui,
   isLinux,
-  epicRedistPath
+  epicRedistPath,
+  fakeEpicExePath
 } from '../../constants'
 import {
   appendGamePlayLog,
@@ -59,7 +60,8 @@ import {
   launchCleanup,
   getRunnerCallWithoutCredentials,
   runWineCommand as runWineCommandUtil,
-  getKnownFixesEnvVariables
+  getKnownFixesEnvVariables,
+  getWinePath
 } from '../../launcher'
 import {
   addShortcuts as addShortcutsUtil,
@@ -876,6 +878,22 @@ export async function launch(
     ...getKnownFixesEnvVariables(appName, 'legendary')
   }
 
+  // We can get this env variable either from the game's settings or from known fixes
+  if (commandEnv['USE_FAKE_EPIC_EXE']) {
+    const fakeExeWinPath = 'C:\\windows\\command\\EpicGamesLauncher.exe'
+    const fakeEpicExePathInPrefix = await getWinePath({
+      path: fakeExeWinPath,
+      gameSettings,
+      variant: 'unix'
+    })
+
+    // we copy the file inside the prefix to avoid permission issues
+    if (!existsSync(fakeEpicExePathInPrefix))
+      copyFileSync(fakeEpicExePath, fakeEpicExePathInPrefix)
+
+    commandEnv['LEGENDARY_WRAPPER_EXE'] = fakeExeWinPath
+  }
+
   const wrappers = setupWrappers(
     gameSettings,
     mangoHudCommand,