[CHEF-1767] Group::Aix subclasses Chef::Provider::Group::Usermod to r…

…euse modify_group_members.

Group::Aix overrides all methods in Group::Groupadd except for load_current_resource.
The Group::Aix code is very similar to Group::Groupadd, diffs are:
 /usr/bin/mkgroup  instead of /usr/sbin/groupadd
 /usr/bin/chgroup  instead of /usr/sbin/groupmod
 /usr/sbin/rmgroup instead of /usr/sbin/groupdel

 args when specifying gid: 'id=$gid' instead of '-g $gid'

chef/lib/chef/provider/group/aix.rb

@@ -0,0 +1,66 @@
+#
+# Author:: Doug MacEachern (<[email protected]>)
+# Copyright:: Copyright (c) 2010 VMware, Inc.
+# License:: Apache License, Version 2.0
+#
+# 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.
+#
+
+require 'chef/provider/group/usermod'
+
+class Chef
+  class Provider
+    class Group
+      class Aix < Chef::Provider::Group::Usermod
+
+        def required_binaries
+          [ "/usr/bin/mkgroup",
+            "/usr/bin/chgroup",
+            "/usr/sbin/rmgroup" ]
+        end
+
+        def create_group
+          command = "mkgroup"
+          command << set_options
+          run_command(:command => command)
+          modify_group_members
+        end
+
+        def manage_group
+          command = "chgroup"
+          command << set_options
+          run_command(:command => command)
+          modify_group_members
+        end
+
+        def remove_group
+          run_command(:command => "rmgroup #{@new_resource.group_name}")
+        end
+
+        def set_options
+          opts = ""
+          { :gid => "id" }.sort { |a,b| a[0] <=> b[0] }.each do |field, option|
+            if @current_resource.send(field) != @new_resource.send(field)
+              if @new_resource.send(field)
+                Chef::Log.debug("#{@new_resource}: setting #{field.to_s} to #{@new_resource.send(field)}")
+                opts << " '#{option}=#{@new_resource.send(field)}'"
+              end
+            end
+          end
+          opts << " #{@new_resource.group_name}"
+        end
+
+      end
+    end
+  end
+end