Use a local compat module instead of cloudify._compat (#77)

Just for a 20 line compat module it's not really worth it
to require a 5.1 common

This just happens to allow the plugin to work with a 5.0.5
manager as well

Co-authored-by: Łukasz Maksymczuk <[email protected]>

fabric_plugin/_compat.py

@@ -0,0 +1,40 @@
+########
+# Copyright (c) 2019 Cloudify Platform Ltd. All rights reserved
+#
+# 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.
+
+"""Python 2 + 3 compatibility utils"""
+# flake8: noqa
+
+import sys
+PY2 = sys.version_info[0] == 2
+
+
+if PY2:
+    try:
+        from cStringIO import StringIO
+    except ImportError:
+        from StringIO import StringIO
+    exec("""
+def exec_(code, globs):
+    exec code in globs
+""")
+
+else:
+    from io import StringIO
+    exec_ = getattr(builtins, 'exec')
+
+
+__all__ = [
+    'StringIO', 'exec_'
+]

fabric_plugin/tasks.py

@@ -31,14 +31,14 @@
 from cloudify import ctx
 from cloudify import utils
 from cloudify import exceptions
-from cloudify._compat import exec_, StringIO
 from cloudify.decorators import operation
 from cloudify.proxy.client import CTX_SOCKET_URL
 from cloudify.proxy import client as proxy_client
 from cloudify.proxy import server as proxy_server
 from cloudify.exceptions import NonRecoverableError
 
 from fabric_plugin import exec_env
+from fabric_plugin._compat import exec_, StringIO
 
 from cloudify.proxy.client import ScriptException
 

fabric_plugin/tests/test_fabric_plugin.py

@@ -20,14 +20,14 @@
 from mock import patch, MagicMock, Mock
 
 from cloudify import ctx
-from cloudify._compat import StringIO
 from cloudify.workflows import local
 from cloudify.decorators import workflow
 from cloudify.endpoint import LocalEndpoint
 from cloudify.workflows import ctx as workflow_ctx
 from cloudify.exceptions import NonRecoverableError
 
 from fabric_plugin import tasks
+from fabric_plugin._compat import StringIO
 
 
 class BaseFabricPluginTest(unittest.TestCase):

setup.py

@@ -17,7 +17,7 @@
 
 setup(
     name='cloudify-fabric-plugin',
-    version='2.0.1',
+    version='2.0.2',
     author='Cloudify',
     author_email='[email protected]',
     packages=['fabric_plugin'],