backups: Minor cosmetic fixes

- Remove some pylint warnings

- Add documentation strings.

- Yapf auto-formatting.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/modules/backups/repository.py

@@ -107,6 +107,7 @@ class BaseBorgRepository(abc.ABC):
 
     @property
     def name(self):
+        """Return a display name for the repository."""
         return self._path
 
     @abc.abstractmethod
@@ -142,6 +143,7 @@ class BaseBorgRepository(abc.ABC):
         self._path = storage['path']
 
     def get_info(self):
+        """Return Borg information about a repository."""
         output = self.run(['info', '--path', self.repo_path])
         return json.loads(output)
 
@@ -165,7 +167,6 @@ class BaseBorgRepository(abc.ABC):
 
     def remove_repository(self):
         """Remove a borg repository"""
-        pass
 
     def list_archives(self):
         output = self.run(['list-repo', '--path', self.repo_path])
@@ -285,14 +286,17 @@ class BaseBorgRepository(abc.ABC):
         }
         if self.uuid:
             storage['uuid'] = self.uuid
+
         if store_credentials:
             storage['credentials'] = self.credentials
+
         return storage
 
     def save(self, store_credentials=True, verified=False):
-        """
-        Save the repository in network_storage (kvstore).
+        """Save the repository in store (kvstore).
+
         - store_credentials: Boolean whether credentials should be stored.
+
         """
         storage = self._get_storage_format(store_credentials, verified)
         self.uuid = store.update_or_add(storage)
@@ -363,15 +367,18 @@ class SshBorgRepository(BaseBorgRepository):
 
     @property
     def mountpoint(self):
+        """Return the local mount point where repository is to be mounted."""
         return os.path.join(self.SSHFS_MOUNTPOINT, self.uuid)
 
     @property
     def is_mounted(self):
+        """Return whether remote path is mounted locally."""
         output = self._run('sshfs',
                            ['is-mounted', '--mountpoint', self.mountpoint])
         return json.loads(output)
 
     def mount(self):
+        """Mount the remote path locally using sshfs."""
         if self.is_mounted:
             return
         known_hosts_path = get_known_hosts_path()
@@ -385,6 +392,7 @@ class SshBorgRepository(BaseBorgRepository):
         self._run('sshfs', arguments, **kwargs)
 
     def umount(self):
+        """Unmount the remote path that was mounted locally using sshfs."""
         if not self.is_mounted:
             return
 

plinth/modules/backups/views.py

@@ -38,13 +38,12 @@ from django.views.generic import FormView, TemplateView, View
 from plinth.errors import PlinthError
 from plinth.modules import backups, storage
 
-from . import (SESSION_PATH_VARIABLE, api, forms,
-               get_known_hosts_path, is_ssh_hostkey_verified, store,
-               split_path)
+from . import (SESSION_PATH_VARIABLE, api, forms, get_known_hosts_path,
+               is_ssh_hostkey_verified, split_path, store)
 from .decorators import delete_tmp_backup_file
 from .errors import BorgRepositoryDoesNotExistError
-from .repository import (BorgRepository, SshBorgRepository,
-                         create_repository, get_repositories)
+from .repository import (BorgRepository, SshBorgRepository, create_repository,
+                         get_repositories)
 
 logger = logging.getLogger(__name__)
 
@@ -236,8 +235,9 @@ class DownloadArchiveView(View):
         repository = create_repository(uuid)
         filename = f'{name}.tar.gz'
 
-        response = StreamingHttpResponse(repository.get_download_stream(name),
-                                         content_type='application/gzip')
+        response = StreamingHttpResponse(
+            repository.get_download_stream(name),
+            content_type='application/gzip')
         response['Content-Disposition'] = 'attachment; filename="%s"' % \
             filename
         return response
@@ -476,9 +476,8 @@ class RemoveRepositoryView(SuccessMessageMixin, TemplateView):
         """Delete the repository on confirmation."""
         repository = create_repository(uuid)
         repository.remove_repository()
-        messages.success(
-            request,
-            _('Repository removed. Backups were not deleted.'))
+        messages.success(request,
+                         _('Repository removed. Backups were not deleted.'))
 
         return redirect('backups:index')