1 files changed, 50 insertions, 0 deletions
diff --git a/ipalib/capabilities.py b/ipalib/capabilities.py
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+++ b/ipalib/capabilities.py
@@ -0,0 +1,50 @@
+# Authors:
+#   Petr Viktorin <pviktori@redhat.com>
+#
+# Copyright (C) 2012  Red Hat
+# see file 'COPYING' for use and warranty information
+#
+# This program 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.
+#
+# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""List of, and utilities for working with, client capabilities by API version
+
+The API version is given in ipapython.version.API_VERSION.
+
+This module defines a dict, ``capabilities``, that maps feature names to API
+versions they were introduced in.
+"""
+
+from distutils import version
+
+VERSION_WITHOUT_CAPABILITIES = u'2.51'
+
+capabilities = dict(
+    # messages: Server output may include an extra key, "messages", that
+    # contains a list of warnings and other messages.
+    # http://freeipa.org/page/V3/Messages
+    messages=u'2.52',
+
+)
+
+
+def client_has_capability(client_version, capability):
+    """Determine whether the client has the given capability
+
+    :param capability: Name of the capability to test
+    :param client_version: The API version string reported by the client
+    """
+
+    version_tuple = version.LooseVersion(client_version)
+
+    return version_tuple >= version.LooseVersion(capabilities[capability])