Extend STORAGE_BACKEND config to support Swift

docs/configuration/system.md

@@ -177,7 +177,7 @@ The dotted path to the desired search backend class. `CachedValueSearchBackend`
 
 Default: None (local storage)
 
-The backend storage engine for handling uploaded files (e.g. image attachments). NetBox supports integration with the [`django-storages`](https://django-storages.readthedocs.io/en/stable/) package, which provides backends for several popular file storage services. If not configured, local filesystem storage will be used.
+The backend storage engine for handling uploaded files (e.g. image attachments). NetBox supports integration with the [`django-storages`](https://django-storages.readthedocs.io/en/stable/) and [`django-storage-swift`](https://github.com/dennisv/django-storage-swift) packages, which provide backends for several popular file storage services. If not configured, local filesystem storage will be used.
 
 The configuration parameters for the specified storage backend are defined under the `STORAGE_CONFIG` setting.
 
@@ -187,7 +187,7 @@ The configuration parameters for the specified storage backend are defined under
 
 Default: Empty
 
-A dictionary of configuration parameters for the storage backend configured as `STORAGE_BACKEND`. The specific parameters to be used here are specific to each backend; see the [`django-storages` documentation](https://django-storages.readthedocs.io/en/stable/) for more detail.
+A dictionary of configuration parameters for the storage backend configured as `STORAGE_BACKEND`. The specific parameters to be used here are specific to each backend; see the documentation for your selected backend ([`django-storages`](https://django-storages.readthedocs.io/en/stable/) or [`django-storage-swift`](https://github.com/dennisv/django-storage-swift)) for more detail.
 
 If `STORAGE_BACKEND` is not defined, this setting will be ignored.
 

netbox/netbox/settings.py

@@ -225,6 +225,23 @@ def _setting(name, default=None):
             return globals().get(name, default)
         storages.utils.setting = _setting
 
+    # django-storage-swift
+    elif STORAGE_BACKEND == 'swift.storage.SwiftStorage':
+        try:
+            import swift.utils  # type: ignore
+        except ModuleNotFoundError as e:
+            if getattr(e, 'name') == 'swift':
+                raise ImproperlyConfigured(
+                    f"STORAGE_BACKEND is set to {STORAGE_BACKEND} but django-storage-swift is not present. "
+                    "It can be installed by running 'pip install django-storage-swift'."
+                )
+            raise e
+
+        # Load all SWIFT_* settings from the user configuration
+        for param, value in STORAGE_CONFIG.items():
+            if param.startswith('SWIFT_'):
+                globals()[param] = value
+
 if STORAGE_CONFIG and STORAGE_BACKEND is None:
     warnings.warn(
         "STORAGE_CONFIG has been set in configuration.py but STORAGE_BACKEND is not defined. STORAGE_CONFIG will be "