Bump pylint version and fix pylint issues

Bumps pylint to version 3.0.2 and fixes some issues in the code
by either ignoring or changing the way we are approaching them.

Signed-off-by: silvacarloss <ces.eduardo98@gmail.com>
Change-Id: Ifdc9ae9326f2b3d63d4b2e9ce14854f391d504a9

manila/exception.py

@@ -578,6 +578,10 @@ class ShareBackendException(ManilaException):
     message = _("Share backend error: %(msg)s.")
 
 
+class OperationNotSupportedByDriverMode(ManilaException):
+    message = _("The share driver mode does not support this operation.")
+
+
 class RequirementMissing(ManilaException):
     message = _("Requirement %(req)s is not installed.")
 

manila/scheduler/evaluator/evaluator.py

@@ -227,7 +227,7 @@ _vars = {}
 
 def _def_parser():
     # Enabling packrat parsing greatly speeds up the parsing.
-    pyparsing.ParserElement.enablePackrat()
+    pyparsing.ParserElement.enablePackrat()  # pylint: disable = no-value-for-parameter # noqa:E501
 
     alphas = pyparsing.alphas
     Combine = pyparsing.Combine

manila/share/api.py

@@ -137,6 +137,7 @@ class API(base.Base):
         self.access_helper = access.ShareInstanceAccess(self.db, None)
         coordination.LOCK_COORDINATOR.start()
 
+    # pylint: disable = no-self-argument
     def prevent_locked_action_on_share(arg):
         """Decorator for preventing a locked method from executing on a share.
 
@@ -471,6 +472,7 @@ class API(base.Base):
                 az_request_multiple_subnet_support_map = (
                     compatible_azs_multiple)
 
+        share = None
         try:
             share = self.db.share_create(context, options,
                                          create_share_instance=False)
@@ -478,7 +480,8 @@ class API(base.Base):
         except Exception:
             with excutils.save_and_reraise_exception():
                 try:
-                    self.db.share_delete(context, share['id'])
+                    if share:
+                        self.db.share_delete(context, share['id'])
                 finally:
                     QUOTAS.rollback(
                         context, reservations, share_type_id=share_type_id)
@@ -844,6 +847,7 @@ class API(base.Base):
         else:
             cast_rules_to_readonly = False
 
+        share_replica = None
         try:
             request_spec, share_replica = (
                 self.create_share_instance_and_get_request_spec(
@@ -862,9 +866,10 @@ class API(base.Base):
         except Exception:
             with excutils.save_and_reraise_exception():
                 try:
-                    self.db.share_replica_delete(
-                        context, share_replica['id'],
-                        need_to_update_usages=False)
+                    if share_replica:
+                        self.db.share_replica_delete(
+                            context, share_replica['id'],
+                            need_to_update_usages=False)
                 finally:
                     QUOTAS.rollback(
                         context, reservations, share_type_id=share_type['id'])
@@ -1639,8 +1644,8 @@ class API(base.Base):
         if metadata:
             options.update({"metadata": metadata})
 
+        snapshot = None
         try:
-            snapshot = None
             snapshot = self.db.share_snapshot_create(context, options)
             QUOTAS.commit(
                 context, reservations,

manila/share/manager.py

@@ -5883,7 +5883,7 @@ class ShareManager(manager.SchedulerDependentManager):
             if not self.driver.driver_handles_share_servers:
                 LOG.error('This operation is supported only on backends that '
                           'handle share servers.')
-                raise
+                raise exception.OperationNotSupportedByDriverMode()
 
             self._share_server_migration_start_driver(
                 context, share_server, dest_host, writable, nondisruptive,

tox.ini

@@ -122,7 +122,7 @@ commands =
 [testenv:pylint]
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
-       pylint==2.3.1
+       pylint==3.0.2
 allowlist_externals = bash
 commands = bash ./tools/coding-checks.sh --pylint {posargs}