From 1664c74a6c5a02640bb5f2204b661f94e825d906 Mon Sep 17 00:00:00 2001
From: lat9nq <22451773+lat9nq@users.noreply.github.com>
Date: Mon, 14 Jun 2021 21:41:25 -0400
Subject: core: Support LayeredFS mod from SDMC directory

Enables loading a mod directly from `[yuzu data
directory]/sdmc/atmosphere/contents/[title_id]`. For use with some
homebrew mod managers.
---
 src/core/file_sys/patch_manager.cpp | 31 +++++++++++++++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

(limited to 'src/core/file_sys/patch_manager.cpp')

diff --git a/src/core/file_sys/patch_manager.cpp b/src/core/file_sys/patch_manager.cpp
index 53b8b7ca0..6f5aa6da2 100644
--- a/src/core/file_sys/patch_manager.cpp
+++ b/src/core/file_sys/patch_manager.cpp
@@ -345,8 +345,10 @@ std::vector<Core::Memory::CheatEntry> PatchManager::CreateCheatList(
 static void ApplyLayeredFS(VirtualFile& romfs, u64 title_id, ContentRecordType type,
                            const Service::FileSystem::FileSystemController& fs_controller) {
     const auto load_dir = fs_controller.GetModificationLoadRoot(title_id);
+    const auto sdmc_load_dir = fs_controller.GetSDMCModificationLoadRoot(title_id);
     if ((type != ContentRecordType::Program && type != ContentRecordType::Data) ||
-        load_dir == nullptr || load_dir->GetSize() <= 0) {
+        ((load_dir == nullptr || load_dir->GetSize() <= 0) &&
+         (sdmc_load_dir == nullptr || sdmc_load_dir->GetSize() <= 0))) {
         return;
     }
 
@@ -356,7 +358,10 @@ static void ApplyLayeredFS(VirtualFile& romfs, u64 title_id, ContentRecordType t
     }
 
     const auto& disabled = Settings::values.disabled_addons[title_id];
-    auto patch_dirs = load_dir->GetSubdirectories();
+    std::vector<VirtualDir> patch_dirs = load_dir->GetSubdirectories();
+    if (std::find(disabled.cbegin(), disabled.cend(), "SDMC") == disabled.cend()) {
+        patch_dirs.push_back(sdmc_load_dir);
+    }
     std::sort(patch_dirs.begin(), patch_dirs.end(),
               [](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
 
@@ -524,6 +529,28 @@ PatchManager::PatchVersionNames PatchManager::GetPatchVersionNames(VirtualFile u
         }
     }
 
+    // SDMC mod directory (LayeredFS)
+    const auto sdmc_mod_dir = fs_controller.GetSDMCModificationLoadRoot(title_id);
+    if (sdmc_mod_dir != nullptr && sdmc_mod_dir->GetSize() > 0) {
+        std::string types;
+
+        const auto exefs_dir = FindSubdirectoryCaseless(sdmc_mod_dir, "exefs");
+        if (IsDirValidAndNonEmpty(exefs_dir)) {
+            bool layeredfs = false;
+
+            if (layeredfs)
+                AppendCommaIfNotEmpty(types, "LayeredExeFS");
+        }
+        if (IsDirValidAndNonEmpty(FindSubdirectoryCaseless(sdmc_mod_dir, "romfs")))
+            AppendCommaIfNotEmpty(types, "LayeredFS");
+
+        if (!types.empty()) {
+            const auto mod_disabled =
+                std::find(disabled.begin(), disabled.end(), "SDMC") != disabled.end();
+            out.insert_or_assign(mod_disabled ? "[D] SDMC" : "SDMC", types);
+        }
+    }
+
     // DLC
     const auto dlc_entries =
         content_provider.ListEntriesFilter(TitleType::AOC, ContentRecordType::Data);
-- 
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