T91406: Asset Library Indexing

Asset library indexing would store indexes of asset files to speed up
asset library browsing.

* Indexes are read when they are up to date
** Index should exist
** Index last modify data should be later than the file it indexes
** Index version should match
* The index of a file containing no assets can be load without opening
   the index file. The size of the file should be below a 32 bytes.
* Indexes are stored on a persistent cache folder.
* Unused index files are automatically removed.

The structure of the index files contains all data needed for browsing assets:
```
{
  "version": <file version number>,
  "entries": [{
    "name": "<asset name>",
    "catalog_id": "<catalog_id>",
    "catalog_name": "<catalog_name>",
    "description": "<description>",
    "author": "<author>",
    "tags": ["<tag>"]
  }]
}
```

Reviewed By: sybren, Severin

Maniphest Tasks: T91406

Differential Revision: https://developer.blender.org/D12693

1 files changed, 2 insertions, 0 deletions

diff --git a/source/blender/editors/space_file/filelist.h b/source/blender/editors/space_file/filelist.h
index 0048a349dca..e7cda106224 100644
--- a/source/blender/editors/space_file/filelist.h
+++ b/source/blender/editors/space_file/filelist.h
@@ -29,6 +29,7 @@ extern "C" {
 
 struct AssetLibraryReference;
 struct BlendHandle;
+struct FileIndexerType;
 struct FileList;
 struct FileSelection;
 struct bUUID;
@@ -72,6 +73,7 @@ void filelist_setfilter_options(struct FileList *filelist,
                                 const bool filter_assets_only,
                                 const char *filter_glob,
                                 const char *filter_search);
+void filelist_setindexer(struct FileList *filelist, const struct FileIndexerType *indexer);
 void filelist_set_asset_catalog_filter_options(
     struct FileList *filelist,
     eFileSel_Params_AssetCatalogVisibility catalog_visibility,