Class: Kafo::HieraConfigurer

Inherits:
Object
  • Object
show all
Defined in:
lib/kafo/hiera_configurer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(user_config_path, modules, modules_order) ⇒ HieraConfigurer

Returns a new instance of HieraConfigurer.



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# File 'lib/kafo/hiera_configurer.rb', line 8

def initialize(user_config_path, modules, modules_order)
  @user_config_path = user_config_path
  @modules = modules
  @modules_order = modules_order
  @logger = KafoConfigure.logger
end

Instance Attribute Details

#config_path ⇒ Object (readonly)

Returns the value of attribute config_path.



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# File 'lib/kafo/hiera_configurer.rb', line 6

def config_path
  @config_path
end

#data_dir ⇒ Object (readonly)

Returns the value of attribute data_dir.



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# File 'lib/kafo/hiera_configurer.rb', line 6

def data_dir
  @data_dir
end

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/kafo/hiera_configurer.rb', line 6

def logger
  @logger
end

#temp_dir ⇒ Object (readonly)

Returns the value of attribute temp_dir.



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# File 'lib/kafo/hiera_configurer.rb', line 6

def temp_dir
  @temp_dir
end

Instance Method Details

#format_yaml_symbols(data) ⇒ Object 



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# File 'lib/kafo/hiera_configurer.rb', line 79

def format_yaml_symbols(data)
  data.gsub('!ruby/sym ', ':')
end

#generate_config(config = {}) ⇒ Object 



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# File 'lib/kafo/hiera_configurer.rb', line 47

def generate_config(config = {})
  config ||= {}

  # ensure YAML is enabled
  config[:backends] ||= []
  config[:backends] << 'yaml' unless config[:backends].include?('yaml')

  # ensure kafo_answers is present and most specific
  config[:hierarchy] ||= []
  config[:hierarchy].unshift('kafo_answers') unless config[:hierarchy].include?('kafo_answers')

  # use our copy of the data dir
  config[:yaml] ||= {}
  config[:yaml][:datadir] = data_dir

  config
end

#generate_data(modules) ⇒ Object 



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# File 'lib/kafo/hiera_configurer.rb', line 65

def generate_data(modules)
  classes = []
  data = modules.select(&:enabled?).inject({}) do |config, mod|
    classes << mod.class_name
    config.update(Hash[mod.params_hash.map { |k, v| ["#{mod.class_name}::#{k}", v] }])
  end
  data['classes'] = @modules_order ? sort_modules(classes, @modules_order) : classes
  data
end

#sort_modules(modules, order) ⇒ Object 



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# File 'lib/kafo/hiera_configurer.rb', line 75

def sort_modules(modules, order)
  (order & modules) + (modules - order)
end

#write_configs ⇒ Object 



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# File 'lib/kafo/hiera_configurer.rb', line 15

def write_configs
  @temp_dir = Dir.mktmpdir('kafo_hiera')
  @config_path = File.join(temp_dir, 'hiera.conf')
  @data_dir = File.join(temp_dir, 'data')

  if @user_config_path
    logger.debug("Merging existing Hiera config file from #{@user_config_path}")
    user_config = YAML.load(File.read(@user_config_path))
    user_data_dir = user_config[:yaml][:datadir] if user_config[:yaml]
  else
    user_config = {}
    user_data_dir = false
  end
  logger.debug("Writing Hiera config file to #{config_path}")
  File.open(config_path, 'w') do |f|
    # merge required config changes into the user's Hiera config
    f.write(format_yaml_symbols(generate_config(user_config).to_yaml))
  end

  if user_data_dir
    logger.debug("Copying Hiera data files from #{user_data_dir} to #{data_dir}")
    FileUtils.cp_r(user_data_dir, data_dir)
  else
    logger.debug("Creating Hiera data files in #{data_dir}")
    FileUtils.mkdir(data_dir)
  end

  File.open(File.join(data_dir, 'kafo_answers.yaml'), 'w') do |f|
    f.write(format_yaml_symbols(generate_data(@modules).to_yaml))
  end
end