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, 3 insertions, 0 deletions

diff --git a/source/blender/editors/space_file/CMakeLists.txt b/source/blender/editors/space_file/CMakeLists.txt
index 4b508f16c1e..1651269869e 100644
--- a/source/blender/editors/space_file/CMakeLists.txt
+++ b/source/blender/editors/space_file/CMakeLists.txt
@@ -17,6 +17,7 @@
 
 set(INC
   ../include
+  ../asset
   ../../blenfont
   ../../blenkernel
   ../../blenlib
@@ -36,6 +37,7 @@ set(INC
 set(SRC
   asset_catalog_tree_view.cc
   file_draw.c
+  file_indexer.cc
   file_ops.c
   file_panels.c
   file_utils.c
@@ -44,6 +46,7 @@ set(SRC
   fsmenu.c
   space_file.c
 
+  file_indexer.h
   file_intern.h
   filelist.h
   fsmenu.h