WiiRoot: Move content manipulation to separate functions

{Initialize,Shutdown}WiiRoot should only be responsible for setting the
SESSION_WII_ROOT or managing the temporary NAND directory.

Move all the content manipulation out of these functions to ensure
separation of concerns and call them after/before WiiRoot init/shutdown
to make sure they operate on the correct root.

Source/Core/Core/HW/HW.cpp

@@ -54,11 +54,13 @@ void Init()
     Core::InitializeWiiRoot(Core::WantsDeterminism());
     IOS::Init();
     IOS::HLE::Init();  // Depends on Memory
+    Core::InitializeWiiFileSystemContents();
   }
 }
 
 void Shutdown()
 {
+  Core::CleanUpWiiFileSystemContents();
   // IOS should always be shut down regardless of bWii because it can be running in GC mode (MIOS).
   IOS::HLE::Shutdown();  // Depends on Memory
   IOS::Shutdown();

Source/Core/Core/WiiRoot.cpp

@@ -61,14 +61,8 @@ void InitializeWiiRoot(bool use_temporary)
       ERROR_LOG(IOS_FS, "Could not create temporary directory");
       return;
     }
-    File::CopyDir(File::GetSysDirectory() + WII_USER_DIR, s_temp_wii_root);
     WARN_LOG(IOS_FS, "Using temporary directory %s for minimal Wii FS", s_temp_wii_root.c_str());
     File::SetUserPath(D_SESSION_WIIROOT_IDX, s_temp_wii_root);
-    // Generate a SYSCONF with default settings for the temporary Wii NAND.
-    SysConf sysconf{IOS::HLE::Kernel{}.GetFS()};
-    sysconf.Save();
-
-    InitializeDeterministicWiiSaves();
   }
   else
   {
@@ -80,12 +74,36 @@ void ShutdownWiiRoot()
 {
   if (!s_temp_wii_root.empty())
   {
+    File::DeleteDirRecursively(s_temp_wii_root);
+    s_temp_wii_root.clear();
+  }
+}
+
+void InitializeWiiFileSystemContents()
+{
+  if (s_temp_wii_root.empty())
+    return;
+
+  File::CopyDir(File::GetSysDirectory() + WII_USER_DIR, s_temp_wii_root);
+
+  // Generate a SYSCONF with default settings for the temporary Wii NAND.
+  SysConf sysconf{IOS::HLE::GetIOS()->GetFS()};
+  sysconf.Save();
+
+  InitializeDeterministicWiiSaves();
+}
+
+void CleanUpWiiFileSystemContents()
+{
+  if (s_temp_wii_root.empty())
+    return;
+
   const u64 title_id = SConfig::GetInstance().GetTitleID();
   std::string save_path = Common::GetTitleDataPath(title_id, Common::FROM_SESSION_ROOT);
   std::string user_save_path = Common::GetTitleDataPath(title_id, Common::FROM_CONFIGURED_ROOT);
-    std::string user_backup_path = File::GetUserPath(D_BACKUP_IDX) +
-                                   StringFromFormat("%08x/%08x/", static_cast<u32>(title_id >> 32),
-                                                    static_cast<u32>(title_id));
+  std::string user_backup_path =
+      File::GetUserPath(D_BACKUP_IDX) +
+      StringFromFormat("%08x/%08x/", static_cast<u32>(title_id >> 32), static_cast<u32>(title_id));
   if (File::Exists(save_path + "/banner.bin") && SConfig::GetInstance().bEnableMemcardSdWriting)
   {
     // Backup the existing save just in case it's still needed.
@@ -99,8 +117,5 @@ void ShutdownWiiRoot()
     File::CopyDir(save_path, user_save_path);
     File::DeleteDirRecursively(save_path);
   }
-    File::DeleteDirRecursively(s_temp_wii_root);
-    s_temp_wii_root.clear();
-  }
-}
 }
+}  // namespace Core

Source/Core/Core/WiiRoot.h

@@ -8,4 +8,8 @@ namespace Core
 {
 void InitializeWiiRoot(bool use_temporary);
 void ShutdownWiiRoot();
+
+// Initialize or clean up the filesystem contents.
+void InitializeWiiFileSystemContents();
+void CleanUpWiiFileSystemContents();
 }