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#
# Author:: AJ Christensen (<aj@opscode.com>)
# Copyright:: Copyright (c) 2008 OpsCode, 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'
require 'chef/mixin/shell_out'
require 'chef/mixin/command'
require 'etc'
class Chef
class Provider
class Group < Chef::Provider
include Chef::Mixin::ShellOut
include Chef::Mixin::Command
attr_accessor :group_exists
attr_accessor :change_desc
def whyrun_supported?
true
end
def initialize(new_resource, run_context)
super
@group_exists = true
end
def load_current_resource
@current_resource = Chef::Resource::Group.new(@new_resource.name)
@current_resource.group_name(@new_resource.group_name)
group_info = nil
begin
group_info = Etc.getgrnam(@new_resource.group_name)
rescue ArgumentError => e
@group_exists = false
Chef::Log.debug("#{@new_resource} group does not exist")
end
if group_info
@new_resource.gid(group_info.gid) unless @new_resource.gid
@current_resource.gid(group_info.gid)
@current_resource.members(group_info.mem)
end
@current_resource
end
def define_resource_requirements
requirements.assert(:modify) do |a|
a.assertion { @group_exists }
a.failure_message(Chef::Exceptions::Group, "Cannot modify #{@new_resource} - group does not exist!")
a.whyrun("Group #{@new_resource} does not exist. Unless it would have been created earlier in this run, this attempt to modify it would fail.")
end
requirements.assert(:all_actions) do |a|
# Make sure that the resource doesn't contain any common
# user names in the members and exclude_members properties.
if !@new_resource.members.nil? && !@new_resource.excluded_members.nil?
common_members = @new_resource.members & @new_resource.excluded_members
a.assertion { common_members.empty? }
a.failure_message(Chef::Exceptions::ConflictingMembersInGroup, "Attempting to both add and remove users from a group: '#{common_members.join(', ')}'")
# No why-run alternative
end
end
end
# Check to see if a group needs any changes. Populate
# @change_desc with a description of why a change must occur
#
# ==== Returns
# <true>:: If a change is required
# <false>:: If a change is not required
def compare_group
@change_desc = [ ]
if @new_resource.gid.to_s != @current_resource.gid.to_s
@change_desc << "change gid #{@current_resource.gid} to #{@new_resource.gid}"
end
if(@new_resource.append)
missing_members = []
@new_resource.members.each do |member|
next if has_current_group_member?(member)
missing_members << member
end
if missing_members.length > 0
@change_desc << "add missing member(s): #{missing_members.join(", ")}"
end
members_to_be_removed = []
@new_resource.excluded_members.each do |member|
if has_current_group_member?(member)
members_to_be_removed << member
end
end
if members_to_be_removed.length > 0
@change_desc << "remove existing member(s): #{members_to_be_removed.join(", ")}"
end
else
if @new_resource.members != @current_resource.members
@change_desc << "replace group members with new list of members"
end
end
!@change_desc.empty?
end
def has_current_group_member?(member)
@current_resource.members.include?(member)
end
def action_create
case @group_exists
when false
converge_by("create #{@new_resource.group_name}") do
create_group
Chef::Log.info("#{@new_resource} created")
end
else
if compare_group
converge_by(["alter group #{@new_resource.group_name}"] + change_desc) do
manage_group
Chef::Log.info("#{@new_resource} altered")
end
end
end
end
def action_remove
if @group_exists
converge_by("remove group #{@new_resource.group_name}") do
remove_group
Chef::Log.info("#{@new_resource} removed")
end
end
end
def action_manage
if @group_exists && compare_group
converge_by(["manage group #{@new_resource.group_name}"] + change_desc) do
manage_group
Chef::Log.info("#{@new_resource} managed")
end
end
end
def action_modify
if compare_group
converge_by(["modify group #{@new_resource.group_name}"] + change_desc) do
manage_group
Chef::Log.info("#{@new_resource} modified")
end
end
end
def create_group
raise NotImplementedError, "subclasses of Chef::Provider::Group should define #create_group"
end
def manage_group
raise NotImplementedError, "subclasses of Chef::Provider::Group should define #manage_group"
end
def remove_group
raise NotImplementedError, "subclasses of Chef::Provider::Group should define #remove_group"
end
end
end
end
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