Move ifupdown2addons into ifupdown2 pacakge

Ticket: CM-3864
Reviewed By:
Testing Done: Tested build and install

open item:
- cleanup stale ifupdown2-addons package files

ifupdownaddons/cache.py

@@ -0,0 +1,90 @@
+#!/usr/bin/python
+#
+# Copyright 2014 Cumulus Networks, Inc. All rights reserved.
+# Author: Roopa Prabhu, roopa@cumulusnetworks.com
+#
+
+import pprint
+from collections import OrderedDict
+
+class linkCache():
+    """ This class contains methods and instance variables to cache
+    link info """
+
+    _shared_state = {}
+
+    """ { <ifacename> : { 'ifindex': <index>,
+                          'mtu': <mtu>,
+                          'state' : <state>',
+                          'flags' : <flags>,
+                          'kind' : <kind: bridge, bond, vlan>,
+                          'linkinfo' : {<attr1> : <attrval1>,
+                                        <attr2> : <attrval2>,
+                                        <ports> : {
+                                                  } """
+    links = {}
+    @classmethod
+    def get_attr(cls, mapList):
+        return reduce(lambda d, k: d[k], mapList, linkCache.links)
+
+    @classmethod
+    def set_attr(cls, mapList, value):
+        cls.get_attr(mapList[:-1])[mapList[-1]] = value
+
+    @classmethod
+    def del_attr(cls, mapList):
+        try:
+            del cls.get_attr(mapList[:-1])[mapList[-1]]
+        except:
+            pass
+
+    @classmethod
+    def update_attrdict(cls, mapList, valuedict):
+        try:
+            cls.get_attr(mapList[:-1])[mapList[-1]].update(valuedict)
+        except:
+            cls.get_attr(mapList[:-1])[mapList[-1]] = valuedict
+            pass
+
+    @classmethod
+    def append_to_attrlist(cls, mapList, value):
+        cls.get_attr(mapList[:-1])[mapList[-1]].append(value)
+
+    @classmethod
+    def remove_from_attrlist(cls, mapList, value):
+        try:
+            cls.get_attr(mapList[:-1])[mapList[-1]].remove(value)
+        except:
+            pass
+
+    @classmethod
+    def check_attr(cls, attrlist, value=None):
+        try:
+            cachedvalue = cls.get_attr(attrlist)
+            if value:
+                if cachedvalue == value:
+                    return True
+                else:
+                    return False
+            elif cachedvalue:
+                return True
+            else:
+                return False
+        except:
+            return False
+
+    @classmethod
+    def invalidate(cls):
+        cls.links = {}
+
+    @classmethod
+    def dump(cls):
+        print 'Dumping link cache'
+        pp = pprint.PrettyPrinter(indent=4)
+        pp.pprint(cls.links)
+
+    @classmethod
+    def dump_link(cls, linkname):
+        print 'Dumping link %s' %linkname
+        pp = pprint.PrettyPrinter(indent=4)
+        pp.pprint(cls.links.get(linkname))