lazy import for upload providers (#342)

Signed-off-by: Rafał Safin <[email protected]>
Co-authored-by: Rafał Safin <[email protected]>

ogion/upload_providers/azure.py

@@ -5,8 +5,6 @@
 from pathlib import Path
 from typing import override
 
-from azure.storage.blob import BlobServiceClient
-
 from ogion import config, core
 from ogion.models.upload_provider_models import AzureProviderModel
 from ogion.upload_providers.base_provider import BaseUploadProvider
@@ -18,6 +16,8 @@ class UploadProviderAzure(BaseUploadProvider):
     """Azure blob storage for storing backups"""
 
     def __init__(self, target_provider: AzureProviderModel) -> None:
+        from azure.storage.blob import BlobServiceClient
+
         self.container_name = target_provider.container_name
 
         blob_service_client = BlobServiceClient.from_connection_string(

ogion/upload_providers/google_cloud_storage.py

@@ -8,10 +8,6 @@
 from pathlib import Path
 from typing import override
 
-import google.cloud.storage as cloud_storage
-from google.auth.credentials import AnonymousCredentials
-from google.oauth2 import service_account
-
 from ogion import config, core
 from ogion.models.upload_provider_models import GCSProviderModel
 from ogion.upload_providers.base_provider import BaseUploadProvider
@@ -23,6 +19,10 @@ class UploadProviderGCS(BaseUploadProvider):
     """GCS bucket for storing backups"""
 
     def __init__(self, target_provider: GCSProviderModel) -> None:
+        import google.cloud.storage as cloud_storage
+        from google.auth.credentials import AnonymousCredentials
+        from google.oauth2 import service_account
+
         service_account_bytes = base64.b64decode(
             target_provider.service_account_base64.get_secret_value()
         )

ogion/upload_providers/s3.py

@@ -5,9 +5,6 @@
 from pathlib import Path
 from typing import override
 
-from minio import Minio
-from minio.deleteobjects import DeleteObject
-
 from ogion import config, core
 from ogion.models.upload_provider_models import S3ProviderModel
 from ogion.upload_providers.base_provider import BaseUploadProvider
@@ -19,6 +16,8 @@ class UploadProviderS3(BaseUploadProvider):
     """S3 compatibile storage bucket for storing backups"""
 
     def __init__(self, target_provider: S3ProviderModel) -> None:
+        from minio import Minio
+
         self.bucket_upload_path = target_provider.bucket_upload_path
         self.max_bandwidth = target_provider.max_bandwidth
 
@@ -82,6 +81,8 @@ def download_backup(self, path: str) -> Path:
     def clean(
         self, backup_file: Path, max_backups: int, min_retention_days: int
     ) -> None:
+        from minio.deleteobjects import DeleteObject
+
         for backup_path in backup_file.parent.iterdir():
             core.remove_path(backup_path)
             log.info("removed %s from local disk", backup_path)