Creating playbook executor and dependent classes

v2/ansible/utils/vars.py

@@ -0,0 +1,51 @@
+# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+# Make coding more python3-ish
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+
+from ansible import constants as C
+
+def combine_vars(a, b):
+
+    if C.DEFAULT_HASH_BEHAVIOUR == "merge":
+        return merge_hash(a, b)
+    else:
+        return dict(a.items() + b.items())
+
+def merge_hash(a, b):
+    ''' recursively merges hash b into a
+    keys from b take precedence over keys from a '''
+
+    result = {}
+
+    for dicts in a, b:
+        # next, iterate over b keys and values
+        for k, v in dicts.iteritems():
+            # if there's already such key in a
+            # and that key contains dict
+            if k in result and isinstance(result[k], dict):
+                # merge those dicts recursively
+                result[k] = merge_hash(a[k], v)
+            else:
+                # otherwise, just copy a value from b to a
+                result[k] = v
+
+    return result
+