Report missing files in Packer.strategise()

blender_asset_tracer/pack/__init__.py

@@ -71,6 +71,7 @@ class Packer:
         # Filled by strategise()
         self._actions = collections.defaultdict(AssetAction) \
             # type: typing.DefaultDict[pathlib.Path, AssetAction]
+        self.missing_files = set()  # type: typing.Set[pathlib.Path]
 
         # Number of files we would copy, if not for --noop
         self._file_count = 0
@@ -105,6 +106,11 @@ class Packer:
             # blendfile thing, since different blendfiles can refer to it in
             # different ways (for example with relative and absolute paths).
             asset_path = usage.abspath
+            if not asset_path.exists():
+                log.info('Missing file: %s', asset_path)
+                self.missing_files.add(asset_path)
+                continue
+
             bfile_path = usage.block.bfile.filepath.absolute()
 
             path_in_project = self._path_in_project(asset_path)

blender_asset_tracer/trace/result.py

@@ -122,10 +122,18 @@ class BlockUsage:
             log.warning('Path %s does not exist for %s', path, self)
 
     def __fspath__(self) -> pathlib.Path:
-        """Determine the absolute path of the asset on the filesystem."""
+        """Determine the absolute path of the asset on the filesystem.
+
+        The path is resolved (see pathlib.Path.resolve()) if it exists on the
+        filesystem.
+        """
         if self._abspath is None:
             bpath = self.block.bfile.abspath(self.asset_path)
-            self._abspath = bpath.to_path().resolve()
+            as_path = bpath.to_path()
+            try:
+                self._abspath = as_path.resolve()
+            except FileNotFoundError:
+                self._abspath = as_path
         return self._abspath
 
     abspath = property(__fspath__)

tests/test_pack.py

@@ -173,3 +173,14 @@ class PackTest(AbstractPackTest):
         self.assertEqual(b'//../linked_cube.blend', libs[0][b'name'])
         self.assertEqual(b'LILib.002', libs[1].id_name)
         self.assertEqual(b'//../material_textures.blend', libs[1][b'name'])
+
+    def test_missing_files(self):
+        infile = self.blendfiles / 'missing_textures.blend'
+        packer = pack.Packer(infile, self.blendfiles, self.tpath)
+        packer.strategise()
+
+        self.assertEqual(
+            [self.blendfiles / 'textures/HDRI/Myanmar/Golden Palace 2, Old Bagan-1k.exr',
+             self.blendfiles / 'textures/Textures/Marble/marble_decoration-color.png'],
+            sorted(packer.missing_files)
+        )