Skip tracing packed blend files

BAT will assume that the packed file is self-contained, i.e. any asset
used by a packed blend file should also be packed.

CHANGELOG.md

@@ -3,6 +3,10 @@
 This file logs the changes that are actually interesting to users (new features,
 changed functionality, fixed bugs).
 
+# Version 1.21 (in development)
+
+- Skip packed blend files. BAT will assume that the packed file is self-contained, i.e. any asset used by a packed blend file should also be packed.
+
 # Version 1.20 (2025-07-11)
 
 - Add support for Blender 5.0 compositor node trees ([16c208bc8e13](https://projects.blender.org/blender/blender-asset-tracer/commit/16c208bc8e130c8b1233bdb411ecabdab19af3c5)).

blender_asset_tracer/trace/blocks2assets.py

@@ -119,6 +119,7 @@ def image(block: blendfile.BlendFileBlock) -> typing.Iterator[result.BlockUsage]
 
 
 @dna_code("LI")
+@skip_packed
 def library(block: blendfile.BlendFileBlock) -> typing.Iterator[result.BlockUsage]:
     """Library data blocks."""
     path, field = block.get(b"name", return_field=True)

tests/test_tracer.py

@@ -370,6 +370,10 @@ class DepsTest(AbstractTracerTest):
             },
         )
 
+    def test_block_li_packed(self):
+        # Packed libraries should not be traced.
+        self.assert_deps("74871-packed-libraries.blend", {})
+
     def test_deps_recursive(self):
         self.assert_deps(
             "doubly_linked.blend",