Extract kolla exceptions into a single exception.py file

Change-Id: I03388360b6ac735d5a6f380a7956cd91ab449131

kolla/exception.py

@@ -0,0 +1,29 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Kolla exception subclasses"""
+
+
+class KollaDirNotFoundException(Exception):
+    pass
+
+
+class KollaUnknownBuildTypeException(Exception):
+    pass
+
+
+class KollaMismatchBaseTypeException(Exception):
+    pass
+
+
+class KollaRpmSetupUnknownConfig(Exception):
+    pass

kolla/image/build.py

@@ -47,6 +47,7 @@ if PROJECT_ROOT not in sys.path:
 
 from kolla.common import config as common_config
 from kolla.common import task
+from kolla import exception
 from kolla.template import filters as jinja_filters
 from kolla.template import methods as jinja_methods
 from kolla import version
@@ -75,23 +76,6 @@ def make_a_logger(conf=None, image_name=None):
 
 LOG = make_a_logger()
 
-
-class KollaDirNotFoundException(Exception):
-    pass
-
-
-class KollaUnknownBuildTypeException(Exception):
-    pass
-
-
-class KollaMismatchBaseTypeException(Exception):
-    pass
-
-
-class KollaRpmSetupUnknownConfig(Exception):
-    pass
-
-
 # Image status constants.
 #
 # TODO(harlowja): use enum lib in the future??
@@ -521,7 +505,7 @@ class KollaWorker(object):
 
         if not ((self.base in rh_base and self.install_type in rh_type) or
                 (self.base in deb_base and self.install_type in deb_type)):
-            raise KollaMismatchBaseTypeException(
+            raise exception.KollaMismatchBaseTypeException(
                 '{} is unavailable for {}'.format(self.install_type, self.base)
             )
 
@@ -536,7 +520,7 @@ class KollaWorker(object):
             self.install_type = 'binary'
             self.install_metatype = 'rhos'
         else:
-            raise KollaUnknownBuildTypeException(
+            raise exception.KollaUnknownBuildTypeException(
                 'Unknown install type'
             )
 
@@ -565,7 +549,8 @@ class KollaWorker(object):
                 LOG.info('Found the docker image folder at %s', image_path)
                 return image_path
         else:
-            raise KollaDirNotFoundException('Image dir can not be found')
+            raise exception.KollaDirNotFoundException('Image dir can not '
+                                                      'be found')
 
     def build_rpm_setup(self, rpm_setup_config):
         """Generates a list of docker commands based on provided configuration.
@@ -589,7 +574,7 @@ class KollaWorker(object):
                     # Copy .repo file from filesystem
                     cmd = "COPY {} /etc/yum.repos.d/".format(config)
             else:
-                raise KollaRpmSetupUnknownConfig(
+                raise exception.KollaRpmSetupUnknownConfig(
                     'RPM setup must be provided as .rpm or .repo files.'
                     ' Attempted configuration was {}'.format(config)
                 )

kolla/tests/test_build.py

@@ -17,6 +17,7 @@ import os
 import requests
 
 from kolla.cmd import build as build_cmd
+from kolla import exception
 from kolla.image import build
 from kolla.tests import base
 
@@ -170,7 +171,7 @@ class KollaWorkerTest(base.TestCase):
                 ['ubuntu', 'debian'], ['rdo', 'rhos']):
             self.conf.set_override('base', base_distro)
             self.conf.set_override('install_type', install_type)
-            self.assertRaises(build.KollaMismatchBaseTypeException,
+            self.assertRaises(exception.KollaMismatchBaseTypeException,
                               build.KollaWorker, self.conf)
 
     def test_build_image_list_adds_plugins(self):