Add FUSE external mapping support, BG3/Oblivion Remastered fixes, fomod-plus and NaK integration

FUSE VFS now deploys non-data-dir mod mappings (Paks, OBSE, UE4SS, etc.)
via real symlinks and injects file-level data-dir mappings (plugins.txt,
loadorder.txt) into the VFS tree. Fixes game launches for Oblivion
Remastered (Root Builder path resolution, script extender support) and
BG3 (Wine prefix documents directory, file mapper symlinks on Linux).

Vendors mo2-fomod-plus plugin and NaK crate for FOMOD installer and
game finder/runtime support.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 27 insertions, 71 deletions

diff --git a/libs/nak_ffi/include/nak_ffi.h b/libs/nak_ffi/include/nak_ffi.h
index df4d47b..8e24041 100644
--- a/libs/nak_ffi/include/nak_ffi.h
+++ b/libs/nak_ffi/include/nak_ffi.h
@@ -84,34 +84,7 @@ NakProtonList nak_find_steam_protons(void);
 void nak_proton_list_free(NakProtonList list);

 

 /* ========================================================================

- * Tier 3: Steam Shortcuts

- * ======================================================================== */

-

-/** Result from adding a Steam shortcut */

-typedef struct {

-    uint32_t app_id;

-    char *prefix_path;  /* NULL on error */

-    char *error;        /* NULL on success */

-} NakShortcutResult;

-

-/** Add a mod manager as a non-Steam game shortcut.

- *  Check result.error: NULL = success. */

-NakShortcutResult nak_add_mod_manager_shortcut(

-    const char *name,

-    const char *exe_path,

-    const char *start_dir,

-    const char *proton_name

-);

-

-/** Remove a non-Steam game shortcut by AppID.

- *  Returns NULL on success, or error message (free with nak_string_free). */

-char *nak_remove_steam_shortcut(uint32_t app_id);

-

-/** Free a NakShortcutResult */

-void nak_shortcut_result_free(NakShortcutResult result);

-

-/* ========================================================================

- * Tier 4: Steam Paths

+ * Tier 3: Steam Paths

  * ======================================================================== */

 

 /** Find the Steam installation path.

@@ -119,48 +92,7 @@ void nak_shortcut_result_free(NakShortcutResult result);
 char *nak_find_steam_path(void);

 

 /* ========================================================================

- * Tier 5: Managed Prefixes

- * ======================================================================== */

-

-/** A managed Wine prefix */

-typedef struct {

-    uint32_t app_id;

-    char *name;

-    char *prefix_path;

-    char *install_path;

-    char *manager_type;

-    char *library_path;

-    char *created;              /* ISO 8601 timestamp */

-    char *proton_config_name;   /* NULL if not set */

-} NakManagedPrefix;

-

-/** List of managed prefixes */

-typedef struct {

-    NakManagedPrefix *prefixes;

-    size_t count;

-} NakManagedPrefixList;

-

-/** Load all managed prefixes */

-NakManagedPrefixList nak_managed_prefixes_load(void);

-

-/** Register a new managed prefix (proton_config_name may be NULL) */

-void nak_managed_prefixes_register(

-    uint32_t app_id,

-    const char *name,

-    const char *prefix_path,

-    const char *install_path,

-    const char *library_path,

-    const char *proton_config_name

-);

-

-/** Unregister a managed prefix by AppID */

-void nak_managed_prefixes_unregister(uint32_t app_id);

-

-/** Free a NakManagedPrefixList */

-void nak_managed_prefix_list_free(NakManagedPrefixList list);

-

-/* ========================================================================

- * Tier 6: Dependency Installation (callback-based)

+ * Tier 4: Dependency Installation (callback-based)

  * ======================================================================== */

 

 /** Callback for status/log messages */

@@ -207,7 +139,7 @@ char *nak_apply_registry_for_game_path(
 );

 

 /* ========================================================================

- * Tier 7: Prefix Symlinks

+ * Tier 5: Prefix Symlinks

  * ======================================================================== */

 

 /** Ensure AppData/Local/Temp exists in the Wine prefix.

@@ -219,6 +151,30 @@ void nak_ensure_temp_directory(const char *prefix_path);
 void nak_create_game_symlinks_auto(const char *prefix_path);

 

 /* ========================================================================

+ * Tier 6: Logging

+ * ======================================================================== */

+

+/** Callback for NaK log messages: (level, message).

+ *  Levels: "info", "warning", "error", "install", "action", "download" */

+typedef void (*NakLogLevelCallback)(const char *level, const char *message);

+

+/** Initialize NaK logging with a callback.

+ *  Call once at startup before any other nak_* functions. */

+void nak_init_logging(NakLogLevelCallback cb);

+

+/* ========================================================================

+ * Tier 7: DXVK Configuration

+ * ======================================================================== */

+

+/** Ensure the DXVK config file exists, downloading if necessary.

+ *  Returns NULL on success, or error message (free with nak_string_free). */

+char *nak_ensure_dxvk_conf(void);

+

+/** Get the path to the DXVK config file.

+ *  Returns newly allocated string (free with nak_string_free). */

+char *nak_get_dxvk_conf_path(void);

+

+/* ========================================================================

  * General

  * ======================================================================== */