Remove six library

The six library was used to bridge the py2 > py3
gap. This library is longer required on branches
that do not support Python2.

Change-Id: Ibebe1ac80342774d47f80f6f5855cd4d064742b6

requirements.txt

@@ -12,7 +12,6 @@ oslo.rootwrap>=5.8.0 # Apache-2.0
 oslo.utils>=3.33.0 # Apache-2.0
 python-glanceclient>=2.8.0 # Apache-2.0
 python-ironicclient!=2.5.2,!=2.7.1,!=3.0.0,>=2.3.0 # Apache-2.0
-six>=1.10.0 # MIT
 oslo.concurrency>=3.26.0 # Apache-2.0
 python-ironic-inspector-client>=1.5.0 # Apache-2.0
 Jinja2>=2.10 # BSD License (3 clause)

tripleo_common/exception.py

@@ -17,9 +17,6 @@
 import logging
 import sys
 
-import six
-from six import reraise as raise_
-
 from tripleo_common.i18n import _
 
 _FATAL_EXCEPTION_FORMAT_ERRORS = False
@@ -27,7 +24,6 @@ _FATAL_EXCEPTION_FORMAT_ERRORS = False
 LOG = logging.getLogger(__name__)
 
 
-@six.python_2_unicode_compatible
 class TripleoCommonException(Exception):
     """Base Tripleo-Common Exception.
 
@@ -53,7 +49,7 @@ class TripleoCommonException(Exception):
                           {'name': name, 'value': value})  # noqa
 
             if _FATAL_EXCEPTION_FORMAT_ERRORS:
-                raise_(exc_info[0], exc_info[1], exc_info[2])
+                raise Exception(exc_info[0], exc_info[1], exc_info[2])
 
     def __str__(self):
         return self.message

tripleo_common/image/builder/buildah.py

@@ -17,7 +17,6 @@
 from concurrent import futures
 import os
 import pathlib
-import six
 import tenacity
 
 from oslo_concurrency import processutils
@@ -264,7 +263,7 @@ class BuildahBuilder(base.BaseBuilder):
         """
 
         self.log.debug("Process deps: {}".format(deps))
-        if isinstance(deps, (six.string_types,)):
+        if isinstance(deps, str):
             if prio_list:
                 prio_list.append(deps)
             else:
@@ -287,7 +286,7 @@ class BuildahBuilder(base.BaseBuilder):
             dep_list = list()
             dep_rehash_list = list()
             for item in deps:
-                if isinstance(item, (six.string_types,)):
+                if isinstance(item, str):
                     dep_list.append(item)
                 else:
                     dep_rehash_list.append(item)

tripleo_common/image/image_builder.py

@@ -18,7 +18,6 @@ import abc
 import logging
 import os
 import shlex
-import six
 import subprocess
 import sys
 
@@ -30,8 +29,7 @@ if sys.version_info[0] < 3:
     open = codecs.open
 
 
-@six.add_metaclass(abc.ABCMeta)
-class ImageBuilder(object):
+class ImageBuilder(object, metaclass=abc.ABCMeta):
     """Base representation of an image building method"""
 
     @staticmethod

tripleo_common/image/image_export.py

@@ -15,11 +15,11 @@
 
 import collections
 import errno
+from functools import wraps
 import hashlib
 import json
 import os
 import requests
-import six
 import shutil
 
 from oslo_log import log as logging
@@ -54,7 +54,7 @@ TYPE_MAP_EXTENSION = '.type-map'
 
 
 def skip_if_exists(f):
-    @six.wraps(f)
+    @wraps(f)
     def wrapper(*args, **kwargs):
         try:
             return f(*args, **kwargs)

tripleo_common/image/image_uploader.py

@@ -24,8 +24,7 @@ import requests
 from requests import auth as requests_auth
 from requests.adapters import HTTPAdapter
 import shutil
-import six
-from six.moves.urllib import parse
+from urllib.parse import urlparse
 import socket
 import subprocess
 import tempfile
@@ -282,7 +281,7 @@ class RegistrySessionHelper(object):
                 and request_response.status_code < 400):
             return request_response
         # parse the destination location
-        redir_url = parse.urlparse(request_response.headers['Location'])
+        redir_url = urlparse(request_response.headers['Location'])
         # close the response since we're going to replace it
         request_response.close()
         auth_header = request_session.headers.pop('Authorization', None)
@@ -494,12 +493,12 @@ class ImageUploadManager(BaseImageManager):
             if not isinstance(cred_entry, dict) or len(cred_entry) != 1:
                 raise TypeError('Credentials entry must be '
                                 'a dict with a single item')
-            if not isinstance(registry, six.string_types):
+            if not isinstance(registry, str):
                 raise TypeError('Key must be a registry host string: %s' %
                                 registry)
             username, password = next(iter(cred_entry.items()))
-            if not (isinstance(username, six.string_types) and
-                    isinstance(password, six.string_types)):
+            if not (isinstance(username, str) and
+                    isinstance(password, str)):
                 raise TypeError('Username and password must be strings: %s' %
                                 username)
 
@@ -1051,7 +1050,7 @@ class BaseImageUploader(object):
     def _image_to_url(cls, image):
         if '://' not in image:
             image = 'docker://' + image
-        url = parse.urlparse(image)
+        url = urlparse(image)
         return url
 
     @classmethod
@@ -1410,8 +1409,8 @@ class PythonImageUploader(BaseImageUploader):
         LOG.info('[%s] Starting upload image process' % t.image_name)
 
         source_local = t.source_image.startswith('containers-storage:')
-        target_image_local_url = parse.urlparse('containers-storage:%s' %
-                                                t.target_image)
+        target_image_local_url = urlparse('containers-storage:%s' %
+                                          t.target_image)
         target_username, target_password = self.credentials_for_registry(
             t.target_image_url.netloc)
         try:
@@ -1447,7 +1446,7 @@ class PythonImageUploader(BaseImageUploader):
                             'container.' % t.image_name)
 
             try:
-                source_local_url = parse.urlparse(t.source_image)
+                source_local_url = urlparse(t.source_image)
                 # Copy from local storage to target registry
                 self._copy_local_to_registry(
                     source_local_url,
@@ -1677,7 +1676,7 @@ class PythonImageUploader(BaseImageUploader):
             image, _, tag = image_url.geturl().rpartition(':')
             for man in manifest.get('manifests', []):
                 # replace image tag with the manifest hash in the list
-                man_url = parse.urlparse('%s@%s' % (image, man['digest']))
+                man_url = urlparse('%s@%s' % (image, man['digest']))
                 self._collect_manifests_layers(
                     man_url, session, manifests_str, layers,
                     multi_arch=False
@@ -1808,7 +1807,7 @@ class PythonImageUploader(BaseImageUploader):
         else:
             if layer_val and known_path:
                 image_ref = target_url.path.split(':')[0][1:]
-                uploaded = parse.urlparse(known_path).scheme
+                uploaded = urlparse(known_path).scheme
                 cls._track_uploaded_layers(
                     layer_val, known_path=known_path, image_ref=image_ref,
                     scope=('remote' if uploaded else 'local'))
@@ -2193,7 +2192,7 @@ class PythonImageUploader(BaseImageUploader):
         else:
             if layer_val and known_path:
                 image_ref = target_url.path.split(':')[0][1:]
-                uploaded = parse.urlparse(known_path).scheme
+                uploaded = urlparse(known_path).scheme
                 cls._track_uploaded_layers(
                     layer_val, known_path=known_path, image_ref=image_ref,
                     scope=('remote' if uploaded else 'local'))
@@ -2385,7 +2384,7 @@ class PythonImageUploader(BaseImageUploader):
         config_digest = manifest['config']['digest']
 
         config_id = '=' + base64.b64encode(
-            six.b(config_digest)).decode("utf-8")
+            config_digest.encode()).decode('utf-8')
         config_str = cls._containers_file('overlay-images', image_id,
                                           config_id)
         manifest = cls._get_local_layers_manifest(manifest, config_str)
@@ -2468,7 +2467,7 @@ class PythonImageUploader(BaseImageUploader):
             if not image:
                 continue
             LOG.info('[%s] Removing local copy of image' % image)
-            image_url = parse.urlparse('containers-storage:%s' % image)
+            image_url = urlparse('containers-storage:%s' % image)
             self._delete(image_url)
 
     def _get_executor(self):

tripleo_common/tests/image/test_image_export.py

@@ -19,8 +19,7 @@ import json
 import os
 import requests
 import shutil
-import six
-from six.moves.urllib.parse import urlparse
+from urllib.parse import urlparse
 import tempfile
 from unittest import mock
 import zlib
@@ -78,7 +77,7 @@ class TestImageExport(base.TestCase):
         )
 
     def test_export_stream(self):
-        blob_data = six.b('The Blob')
+        blob_data = b'The Blob'
         blob_compressed = zlib.compress(blob_data)
         calc_digest = hashlib.sha256()
         calc_digest.update(blob_compressed)
@@ -114,7 +113,7 @@ class TestImageExport(base.TestCase):
     @mock.patch('tripleo_common.image.image_export.open',
                 side_effect=MemoryError())
     def test_export_stream_memory_error(self, mock_open):
-        blob_data = six.b('The Blob')
+        blob_data = b'The Blob'
         blob_compressed = zlib.compress(blob_data)
         calc_digest = hashlib.sha256()
         calc_digest.update(blob_compressed)
@@ -129,7 +128,7 @@ class TestImageExport(base.TestCase):
                           target_url, layer, layer_stream, verify_digest=False)
 
     def test_export_stream_verify_failed(self):
-        blob_data = six.b('The Blob')
+        blob_data = b'The Blob'
         blob_compressed = zlib.compress(blob_data)
         calc_digest = hashlib.sha256()
         calc_digest.update(blob_compressed)

tripleo_common/tests/image/test_image_uploader.py

@@ -19,8 +19,7 @@ import json
 import operator
 import requests
 from requests_mock.contrib import fixture as rm_fixture
-import six
-from six.moves.urllib.parse import urlparse
+from urllib.parse import urlparse
 from unittest import mock
 import zlib
 
@@ -32,7 +31,7 @@ from tripleo_common.tests import base
 from tripleo_common.tests.image import fakes
 
 
-filedata = six.u(
+filedata = str(
     """container_images:
     - imagename: docker.io/tripleomaster/heat-docker-agents-centos:latest
       push_destination: localhost:8787
@@ -1884,7 +1883,7 @@ class TestPythonImageUploader(base.TestCase):
         source_session = requests.Session()
         target_session = requests.Session()
 
-        blob_data = six.b('The Blob')
+        blob_data = b'The Blob'
         calc_digest = hashlib.sha256()
         calc_digest.update(blob_data)
         blob_digest = 'sha256:' + calc_digest.hexdigest()
@@ -2237,8 +2236,8 @@ class TestPythonImageUploader(base.TestCase):
     def test_copy_registry_to_local(self, mock_popen, mock_environ):
         mock_success = mock.Mock()
         mock_success.communicate.return_value = (
-            six.b('pull complete'),
-            six.b('')
+            b'pull complete',
+            b''
         )
         mock_success.returncode = 0
 
@@ -2274,7 +2273,7 @@ class TestPythonImageUploader(base.TestCase):
         layer = {'digest': 'sha256:aaaa'}
         target_session = requests.Session()
 
-        blob_data = six.b('The Blob')
+        blob_data = b'The Blob'
         calc_digest = hashlib.sha256()
         calc_digest.update(blob_data)
         blob_digest = 'sha256:' + calc_digest.hexdigest()

tripleo_common/tests/image/test_kolla_builder.py

@@ -14,7 +14,6 @@
 #
 
 import os
-import six
 import sys
 import tempfile
 from unittest import mock
@@ -41,7 +40,7 @@ KB_DEFAULT_PREFIX = kb.CONTAINER_IMAGES_DEFAULTS['name_prefix']
 KB_DEFAULT_NAMESPACE = kb.CONTAINER_IMAGES_DEFAULTS['namespace']
 
 
-filedata = six.u("""container_images:
+filedata = str("""container_images:
 - imagename: docker.io/tripleomaster/heat-docker-agents-centos:latest
   image_source: kolla
   push_destination: localhost:8787
@@ -60,7 +59,7 @@ filedata = six.u("""container_images:
   push_destination: localhost:8787
 """)
 
-template_filedata = six.u("""
+template_filedata = str("""
 container_images_template:
 - imagename: "{{namespace}}/heat-docker-agents-centos:latest"
   image_source: kolla

tripleo_common/tests/utils/test_ansible.py

@@ -15,7 +15,7 @@
 
 import json
 import os
-from six.moves import configparser
+import configparser
 import shutil
 import tempfile
 from unittest import mock

tripleo_common/update.py

@@ -13,8 +13,6 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from six import iteritems
-
 from heatclient.common import template_utils
 
 from tripleo_common import constants
@@ -36,7 +34,7 @@ def search_stack(stack_data, key_name):
             if result:
                 return result
     elif isinstance(stack_data, dict):
-        for k, v in iteritems(stack_data):
+        for k, v in stack_data.items():
             if k == key_name:
                 return v
             result = search_stack(v, key_name)

tripleo_common/utils/ansible.py

@@ -13,15 +13,14 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 from datetime import datetime
+from io import StringIO
 import json
 import logging
 import multiprocessing
 import os
 from pathlib import Path
 import shutil
-import six
-from six.moves import configparser
-from six.moves import cStringIO as StringIO
+import configparser
 import tempfile
 import yaml
 
@@ -165,10 +164,10 @@ def _get_inventory(inventory, work_dir):
     if not inventory:
         return None
 
-    if (isinstance(inventory, six.string_types) and
+    if (isinstance(inventory, str) and
             os.path.exists(inventory)):
         return inventory
-    if not isinstance(inventory, six.string_types):
+    if not isinstance(inventory, str):
         inventory = yaml.safe_dump(inventory)
 
     path = os.path.join(work_dir, 'inventory.yaml')
@@ -183,7 +182,7 @@ def _get_ssh_private_key(ssh_private_key, work_dir):
     if not ssh_private_key:
         return None
 
-    if (isinstance(ssh_private_key, six.string_types) and
+    if (isinstance(ssh_private_key, str) and
             os.path.exists(ssh_private_key)):
         os.chmod(ssh_private_key, 0o600)
         return ssh_private_key
@@ -201,10 +200,10 @@ def _get_playbook(playbook, work_dir):
     if not playbook:
         return None
 
-    if (isinstance(playbook, six.string_types) and
+    if (isinstance(playbook, str) and
             os.path.exists(playbook)):
         return playbook
-    if not isinstance(playbook, six.string_types):
+    if not isinstance(playbook, str):
         playbook = yaml.safe_dump(playbook)
 
     path = os.path.join(work_dir, 'playbook.yaml')
@@ -295,7 +294,7 @@ def run_ansible_playbook(playbook, work_dir=None, **kwargs):
             msg = "extra_env_variables must be a dict"
             raise RuntimeError(msg)
         for key, value in extra_env_variables.items():
-            extra_env_variables[key] = six.text_type(value)
+            extra_env_variables[key] = str(value)
 
     try:
         ansible_config_path = write_default_ansible_cfg(
@@ -320,7 +319,7 @@ def run_ansible_playbook(playbook, work_dir=None, **kwargs):
                     'tripleo_dense,tripleo_profile_tasks,tripleo_states',
                 'ANSIBLE_STDOUT_CALLBACK': 'tripleo_dense',
                 'PROFILE_TASKS_TASK_OUTPUT_LIMIT':
-                    six.text_type(profile_tasks_limit),
+                    str(profile_tasks_limit),
             })
 
         if extra_env_variables:

tripleo_common/utils/config.py

@@ -18,7 +18,6 @@ import logging
 import os
 import re
 import shutil
-import six
 import tempfile
 import warnings
 import yaml
@@ -136,7 +135,7 @@ class Config(object):
             # Filter out boolean value and remove blanks
             flatten_when = "".join([re.sub(r'\s+', '', x)
                                     for x in whenexpr
-                                    if isinstance(x, six.string_types)])
+                                    if isinstance(x, str)])
             # make \|int optional incase forgotten; use only step digit:
             # ()'s around step|int are also optional
             steps_found = re.findall(r'\(?step(?:\|int)?\)?==(\d+)',
@@ -262,7 +261,7 @@ class Config(object):
         role_data = self.stack_outputs.get('RoleData', {})
         role_group_vars = self.stack_outputs.get('RoleGroupVars', {})
         role_host_vars = self.stack_outputs.get('AnsibleHostVarsMap', {})
-        for role_name, role in six.iteritems(role_data):
+        for role_name, role in role_data.items():
             role_path = os.path.join(config_dir, role_name)
             self._mkdir(role_path)
             for config in config_type or role.keys():
@@ -304,7 +303,7 @@ class Config(object):
                                        default_flow_style=False)
 
         role_config = self.get_role_config()
-        for config_name, config in six.iteritems(role_config):
+        for config_name, config in role_config.items():
 
             # External tasks are in RoleConfig and not defined per role.
             # So we don't use the RoleData to create the per step playbooks.
@@ -512,8 +511,8 @@ class Config(object):
 
                 # If the value is not a string already, pretty print it as a
                 # string so it's rendered in a readable format.
-                if not (isinstance(data, six.text_type) or
-                        isinstance(data, six.string_types)):
+                if not (isinstance(data, str) or
+                        isinstance(data, str)):
                     data = json.dumps(data, indent=2)
 
                 d['config'] = data

tripleo_common/utils/keystone.py

@@ -14,8 +14,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import six
-
 from keystoneauth1.identity.generic import Token as IdentityToken
 from keystoneauth1 import loading
 from keystoneauth1 import session as ks_session
@@ -220,7 +218,7 @@ def get_endpoint_for_project(ctx, service_name=None, service_type=None,
     endpoint = None
     os_actions_endpoint_type = 'public'
 
-    for endpoints in six.itervalues(service_endpoints):
+    for endpoints in service_endpoints.items():
         for ep in endpoints:
             # is V3 interface?
             if 'interface' in ep:

tripleo_common/utils/nodes.py

@@ -18,7 +18,6 @@ import logging
 import re
 
 from oslo_utils import netutils
-import six
 
 from ironicclient import exceptions as ironicexceptions
 from oslo_concurrency import processutils
@@ -417,7 +416,7 @@ def register_ironic_node(node, client):
 
     for field in ('name', 'uuid'):
         if field in node:
-            create_map.update({field: six.text_type(node[field])})
+            create_map.update({field: str(node[field])})
 
     conductor_group = node.get("conductor_group")
     if conductor_group:
@@ -518,7 +517,7 @@ def _update_or_register_ironic_node(node, node_map, client):
 
         patched = {}
         for field, paths in _NON_DRIVER_FIELDS.items():
-            if isinstance(paths, six.string_types):
+            if isinstance(paths, str):
                 paths = [paths]
 
             if field in node:
@@ -679,7 +678,7 @@ def validate_nodes(nodes_list):
 
 def dict_to_capabilities(caps_dict):
     """Convert a dictionary into a string with the capabilities syntax."""
-    if isinstance(caps_dict, six.string_types):
+    if isinstance(caps_dict, str):
         return caps_dict
 
     # NOTE(dtantsur): sort capabilities so that their order does not change

tripleo_common/utils/overcloudrc.py

@@ -13,8 +13,7 @@
 #   under the License.
 
 import logging
-
-from six.moves import urllib
+import urllib
 
 from tripleo_common import constants
 from tripleo_common.utils import common as common_utils

tripleo_common/utils/passwords.py

@@ -25,7 +25,6 @@ import time
 import uuid
 
 import passlib.pwd
-import six
 import yaml
 
 from tripleo_common import constants
@@ -64,7 +63,7 @@ def generate_passwords(stack_env=None,
             passwords[name] = create_cephx_key()
         elif name == "CephClusterFSID":
             # The FSID must be a UUID
-            passwords[name] = six.text_type(uuid.uuid4())
+            passwords[name] = str(uuid.uuid4())
         # Since by default passlib.pwd.genword uses all digits and ascii upper
         # & lowercase letters, it provides ~5.95 entropy per character.
         # Make the length of the default authkey 4096 bytes, which should give

tripleo_common/utils/roles.py

@@ -13,14 +13,12 @@
 #   under the License.
 #
 
+from io import StringIO
 import logging
 import os
 import shutil
 import yaml
 
-import six
-from six.moves import cStringIO as StringIO
-
 from tripleo_common.exception import NotFound
 from tripleo_common.exception import RoleMetadataError
 
@@ -156,14 +154,14 @@ def validate_role_yaml(role_data=None, role_path=None):
         raise RoleMetadataError('Unable to parse role yaml')
 
     schema = {
-        'name': {'type': six.string_types},
+        'name': {'type': str},
         'CountDefault': {'type': int},
-        'HostnameFormatDefault': {'type': six.string_types},
+        'HostnameFormatDefault': {'type': str},
         'disable_constraints': {'type': bool},  # TODO(sbaker) remove in U
         'upgrade_batch_size': {'type': int},
         'ServicesDefault': {'type': list},
         'tags': {'type': list},
-        'description': {'type': six.string_types},
+        'description': {'type': str},
         'networks': {'type': [list, dict]},
         'networks_skip_config': {'type': list},
     }