blender implementation has copy of blender load_scripts function

openpype/hosts/blender/api/lib.py

@@ -0,0 +1,93 @@
+import os
+import traceback
+import importlib
+
+import bpy
+
+
+def load_scripts(paths):
+    """Copy of `load_scripts` from Blender's implementation.
+
+    It is possible that whis function will be changed in future and usage will
+    be based on Blender version.
+    """
+    import bpy_types
+
+    loaded_modules = set()
+
+    previous_classes = [
+        cls
+        for cls in bpy.types.bpy_struct.__subclasses__()
+    ]
+
+    def register_module_call(mod):
+        register = getattr(mod, "register", None)
+        if register:
+            try:
+                register()
+            except:
+                traceback.print_exc()
+        else:
+            print("\nWarning! '%s' has no register function, "
+                  "this is now a requirement for registerable scripts" %
+                  mod.__file__)
+
+    def unregister_module_call(mod):
+        unregister = getattr(mod, "unregister", None)
+        if unregister:
+            try:
+                unregister()
+            except:
+                traceback.print_exc()
+
+    def test_reload(mod):
+        # reloading this causes internal errors
+        # because the classes from this module are stored internally
+        # possibly to refresh internal references too but for now, best not to.
+        if mod == bpy_types:
+            return mod
+
+        try:
+            return importlib.reload(mod)
+        except:
+            traceback.print_exc()
+
+    def test_register(mod):
+        if mod:
+            register_module_call(mod)
+            bpy.utils._global_loaded_modules.append(mod.__name__)
+
+    from bpy_restrict_state import RestrictBlend
+
+    with RestrictBlend():
+        for base_path in paths:
+            for path_subdir in bpy.utils._script_module_dirs:
+                path = os.path.join(base_path, path_subdir)
+                if not os.path.isdir(path):
+                    continue
+
+                bpy.utils._sys_path_ensure_prepend(path)
+
+                # Only add to 'sys.modules' unless this is 'startup'.
+                if path_subdir != "startup":
+                    continue
+                for mod in bpy.utils.modules_from_path(path, loaded_modules):
+                    test_register(mod)
+
+    # load template (if set)
+    if any(bpy.utils.app_template_paths()):
+        import bl_app_template_utils
+        bl_app_template_utils.reset(reload_scripts=False)
+        del bl_app_template_utils
+
+    for cls in bpy.types.bpy_struct.__subclasses__():
+        if cls in previous_classes:
+            continue
+        if not getattr(cls, "is_registered", False):
+            continue
+        for subcls in cls.__subclasses__():
+            if not subcls.is_registered:
+                print(
+                    "Warning, unregistered class: %s(%s)" %
+                    (subcls.__name__, cls.__name__)
+                )