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#
# Chef::Node
#
# Author:: Adam Jacob (<adam@hjksolutions.com>)
# Copyright:: Copyright (c) 2008 HJK Solutions, LLC
# License:: GNU General Public License version 2 or later
#
# This program and entire repository 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 2 of the License, or 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
require File.join(File.dirname(__FILE__), "mixin", "check_helper")
require File.join(File.dirname(__FILE__), "mixin", "from_file")
require 'rubygems'
require 'json'
class Chef
class Node
attr_accessor :attribute, :recipe_list
include Chef::Mixin::CheckHelper
include Chef::Mixin::FromFile
# Create a new Chef::Node object.
def initialize()
@name = nil
@attribute = Hash.new
@recipe_list = Array.new
end
# Find a Chef::Node by fqdn. Will search first for Chef::Config["node_path"]/fqdn.rb, then
# hostname.rb, then default.rb.
#
# Returns a new Chef::Node object.
#
# Raises an ArgumentError if it cannot find the node.
def self.find(fqdn)
node_file = nil
host_parts = fqdn.split(".")
hostname = host_parts[0]
if File.exists?(File.join(Chef::Config[:node_path], "#{fqdn}.rb"))
node_file = File.join(Chef::Config[:node_path], "#{fqdn}.rb")
elsif File.exists?(File.join(Chef::Config[:node_path], "#{hostname}.rb"))
node_file = File.join(Chef::Config[:node_path], "#{hostname}.rb")
elsif File.exists?(File.join(Chef::Config[:node_path], "default.rb"))
node_file = File.join(Chef::Config[:node_path], "default.rb")
else
raise ArgumentError, "Cannot find a node matching #{fqdn}, not even with default.rb!"
end
chef_node = Chef::Node.new()
chef_node.from_file(node_file)
chef_node
end
# Returns an array of nodes available, based on the list of files present.
def self.list
results = Array.new
Dir[File.join(Chef::Config[:node_path], "*.rb")].sort.each do |file|
mr = file.match(/^.+\/(.+)\.rb$/)
node_name = mr[1]
results << node_name
end
results
end
# Set the name of this Node, or return the current name.
def name(arg=nil)
set_if_args(@name, arg) do |a|
case a
when String
@name = a
else
raise ArgumentError, "The nodes name must be a string"
end
end
end
# Return an attribute of this node. Returns nil if the attribute is not found.
def [](attrib)
if @attribute.has_key?(attrib)
@attribute[attrib]
elsif @attribute.has_key?(attrib.to_s)
@attribute[attrib.to_s]
else
nil
end
end
# Set an attribute of this node
def []=(attrib, value)
@attribute[attrib] = value
end
# Iterates over each attribute, passing the attribute and value to the block.
def each_attribute(&block)
@attribute.each do |k,v|
yield(k, v)
end
end
# Return true if this Node has a given attribute, false if not. Takes either a symbol or
# a string.
def attribute?(attrib)
result = false
result = @attribute.has_key?(attrib)
return result if result
return @attribute.has_key?(attrib.to_sym)
end
# Returns true if this Node expects a given recipe, false if not.
def recipe?(recipe_name)
@recipe_list.detect { |r| r == recipe_name } ? true : false
end
# Returns an Array of recipes. If you call it with arguments, they will become the new
# list of recipes.
def recipes(*args)
if args.length > 0
@recipe_list = args.flatten
else
@recipe_list
end
end
# Set an attribute based on the missing method. If you pass an argument, we'll use that
# to set the attribute values. Otherwise, we'll wind up just returning the attributes
# value.
def method_missing(symbol, *args)
if args.length != 0
@attribute[symbol] = args.length == 1 ? args[0] : args
else
if @attribute.has_key?(symbol)
@attribute[symbol]
else
raise ArgumentError, "Attribute #{symbol.to_s} is not defined!"
end
end
end
# Serialize this Node as json
def to_json()
result_object = {
"name" => @name,
"type" => "Chef::Node",
"attributes" => Hash.new,
"recipes" => Array.new
}
each_attribute do |a,v|
result_object["attributes"][a] = v
end
recipes.each do |r|
result_object["recipes"] << r
end
result_object.to_json
end
end
end
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