Add cache_file parameter for DynamicClient (#46)

plugins/module_utils/cache.py

@@ -0,0 +1,55 @@
+# Copyright [2017] [Red Hat, Inc.]
+#
+# 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.
+
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+import os
+
+from ansible.module_utils.six import PY3
+
+
+def get_user():
+    if hasattr(os, 'getlogin'):
+        try:
+            user = os.getlogin()
+            if user:
+                return str(user)
+        except OSError:
+            pass
+    if hasattr(os, 'getuid'):
+        try:
+            user = os.getuid()
+            if user:
+                return str(user)
+        except OSError:
+            pass
+    user = os.environ.get("USERNAME")
+    if user:
+        return str(user)
+    return None
+
+
+def get_default_cache_id(client):
+    user = get_user()
+    if user:
+        cache_id = "{0}-{1}".format(client.configuration.host, user)
+    else:
+        cache_id = client.configuration.host
+
+    if PY3:
+        return cache_id.encode('utf-8')
+
+    return cache_id