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Chef::Mixin::Language::PlatformDependentValue

Implementation class for determining platform dependent values

Public Class Methods

new(platform_hash) click to toggle source

Create a platform dependent value object.

Arguments

platform_hash (Hash) a hash of the same structure as Chef::Platform, like this:

{
  :debian => {:default => 'the value for all debian'}
  [:centos, :redhat, :fedora] => {:default => "value for all EL variants"}
  :ubuntu => { :default => "default for ubuntu", '10.04' => "value for 10.04 only"},
  :default => "the default when nothing else matches"
}
  • platforms can be specified as Symbols or Strings

  • multiple platforms can be grouped by using an Array as the key

  • values for platforms need to be Hashes of the form: {platform_version => value_for_that_version}

  • the exception to the above is the default value, which is given as :default => default_value

# File lib/chef/mixin/language.rb, line 47
def initialize(platform_hash)
  @values = {}
  platform_hash.each { |platforms, value| set(platforms, value)}
end

Public Instance Methods

value_for_node(node) click to toggle source
# File lib/chef/mixin/language.rb, line 52
def value_for_node(node)
  platform, version = node[:platform].to_s, node[:platform_version].to_s
  if @values.key?(platform) && @values[platform].key?(version)
    @values[platform][version]
  elsif @values.key?(platform) && @values[platform].key?("default")
    @values[platform]["default"]
  elsif @values.key?("default")
    @values["default"]
  else
    nil
  end
end

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