Updated hostgroup plugins module to where it can at least be imported

TODO

@@ -54,6 +54,19 @@ CRUD base classes:
   * The Retrieve method should add in the common Flag('all') option for
     retrieving all attributes.
 
+  * We probably need some LDAP centric crud method base classes, like
+    LDAPCreate, etc.  Or other options it to have an LDAPObject base class and
+    have the crud Method plugins rely more on their corresponding Object plugin.
+
+
+Existing plugins:
+
+  * Many existing plugins that are doing crud-type operations aren't using the
+    Object + Method way of defining their parameters, and are therefore defining
+    the exact same parameter several times in a module.  This should be fixed
+    one way or another... if there are deficiencies in the crud base classes,
+    they need to be improved.
+
 
 Command Line interface:
 
@@ -61,6 +74,10 @@ Command Line interface:
 
   * Make possible Enum values self-documenting
 
+  * All "comma-separated list of..." parameters should really be changed to
+    multivalue and have a flag that tells the CLI whether a multivalue should
+    be parsed as comma-separated.
+
 
 Improve ease of plugin writting
   - make "from ipalib import *" import everything a plugin writter will need

ipalib/plugins/f_hostgroup.py

@@ -21,12 +21,10 @@
 Frontend plugins for groups of hosts
 """
 
-from ipalib import frontend
-from ipalib import crud
-from ipalib.frontend import Param
-from ipalib import api
-from ipalib import errors
-from ipalib import ipa_types
+from ipalib import api, crud, errors
+from ipalib import Object, Command  # Plugin base classes
+from ipalib import Str  # Parameter types
+
 
 hostgroup_filter = "groupofnames)(!(objectclass=posixGroup)"
 
@@ -43,18 +41,18 @@ def get_members(members):
 
     return members
 
-class hostgroup(frontend.Object):
+class hostgroup(Object):
     """
     Host Group object.
     """
     takes_params = (
-        Param('description',
+        Str('description',
             doc='A description of this group',
         ),
-        Param('cn',
+        Str('cn',
             cli_name='name',
             primary_key=True,
-            normalize=lambda value: value.lower(),
+            normalizer=lambda value: value.lower(),
         )
     )
 api.register(hostgroup)
@@ -220,14 +218,14 @@ class hostgroup_show(crud.Get):
 api.register(hostgroup_show)
 
 
-class hostgroup_add_member(frontend.Command):
+class hostgroup_add_member(Command):
     'Add a member to a group.'
     takes_args = (
-        Param('group', primary_key=True),
+        Str('group', primary_key=True),
     )
     takes_options = (
-        Param('groups?', doc='comma-separated list of host groups to add'),
-        Param('hosts?', doc='comma-separated list of hosts to add'),
+        Str('groups?', doc='comma-separated list of host groups to add'),
+        Str('hosts?', doc='comma-separated list of hosts to add'),
     )
     def execute(self, cn, **kw):
         """
@@ -288,14 +286,14 @@ class hostgroup_add_member(frontend.Command):
 api.register(hostgroup_add_member)
 
 
-class hostgroup_remove_member(frontend.Command):
+class hostgroup_remove_member(Command):
     'Remove a member from a group.'
     takes_args = (
-        Param('group', primary_key=True),
+        Str('group', primary_key=True),
     )
     takes_options = (
-        Param('hosts?', doc='comma-separated list of hosts to add'),
-        Param('groups?', doc='comma-separated list of groups to remove'),
+        Str('hosts?', doc='comma-separated list of hosts to add'),
+        Str('groups?', doc='comma-separated list of groups to remove'),
     )
     def execute(self, cn, **kw):
         """