blender 4.2 - fix errors detecting last commit hash

1) __file__ / bim no longer exists as 'bim' is moved to the wheel
2) there also was an issue detecting hash after it was moved from bim to blenderbim package in c0635af

src/blenderbim/blenderbim/__init__.py

@@ -147,8 +147,7 @@ if IN_BLENDER:
 
         # We can't just use __file__ as blenderbim/__init__.py is typically not symlinked
         # as Blender have errors symlinking main addon package file.
-        path = Path(__file__).parent / "bim" / "__init__.py"
-        path = path.resolve().parent
+        path = Path(__file__).resolve().parent
         repo = git.Repo(str(path), search_parent_directories=True)
         last_commit_hash = repo.head.object.hexsha
     except:

src/blenderbim/blenderbim/bim/__init__.py

@@ -196,7 +196,6 @@ for mod in modules.values():
 addon_keymaps = []
 icons = None
 is_registering = False
-last_commit_hash = "8888888"
 original_scene_panels_polls: dict[bpy.types.Panel, Union[Callable, None]] = dict()
 
 

src/blenderbim/blenderbim/tool/blender.py

@@ -920,7 +920,8 @@ class Blender(blenderbim.core.tool.Blender):
     @classmethod
     def get_last_commit_hash(cls) -> Union[str, None]:
         """Get 8 symbols of last commit hash if it's present or return None otherwise."""
-        commit_hash = blenderbim.bim.last_commit_hash
+        bbim = cls.get_bbim_extension_package()
+        commit_hash = bbim.last_commit_hash
 
         # Commit hash is unset - user is using __init__ from repo
         # without setting up git repository.