Class: Hiera::Backend::Eyaml_backend

Inherits:
Object
  • Object
show all
Defined in:
lib/hiera/backend/eyaml_backend.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Eyaml_backend

Returns a new instance of Eyaml_backend.



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# File 'lib/hiera/backend/eyaml_backend.rb', line 11

def initialize
  @extension = Config[:eyaml][:extension] ? Config[:eyaml][:extension] : "eyaml"
end

Instance Method Details

#deblock(block_string) ⇒ Object 



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# File 'lib/hiera/backend/eyaml_backend.rb', line 82

def deblock block_string
  block_string.gsub(/[ \n]/, '')
end

#debug(msg) ⇒ Object 



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# File 'lib/hiera/backend/eyaml_backend.rb', line 116

def debug(msg)
  Hiera.debug("[eyaml_backend]: #{msg}")
end

#decrypt(key, value, scope) ⇒ Object 



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# File 'lib/hiera/backend/eyaml_backend.rb', line 86

def decrypt(key, value, scope)

  if encrypted? value

    debug "Attempting to decrypt: #{key}"

    Config[:eyaml].each do |config_key, config_value|
      config_value = Backend.parse_string(Config[:eyaml][config_key], scope)
      debug "Setting: #{config_key} = #{config_value}"
      Eyaml::Options[config_key] = config_value
    end

    Eyaml::Options[:source] = "hiera"

    parser = Eyaml::Parser::ParserFactory.hiera_backend_parser
    tokens = parser.parse(value)
    decrypted = tokens.map{ |token| token.to_plain_text }
    plaintext = decrypted.join

    plaintext.chomp

  else
    value
  end
end

#encrypted?(value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hiera/backend/eyaml_backend.rb', line 112

def encrypted?(value)
  if value.match(/.*ENC\[.*?\]/) then true else false end
end

#lookup(key, scope, order_override, resolution_type) ⇒ Object 



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# File 'lib/hiera/backend/eyaml_backend.rb', line 15

def lookup(key, scope, order_override, resolution_type)

  debug("Lookup called for key #{key}")
  answer = nil

  Backend.datasources(scope, order_override) do |source|
    eyaml_file = Backend.datafile(:eyaml, scope, source, @extension) || next

    debug("Processing datasource: #{eyaml_file}")

    data = YAML.load(File.read( eyaml_file ))

    next if data.nil? or data.empty?
    debug ("Data contains valid YAML")

    next unless data.include?(key)
    debug ("Key #{key} found in YAML document")

    parsed_answer = parse_answer(key, data[key], scope)

    begin
      case resolution_type
      when :array
        debug("Appending answer array")
        raise Exception, "Hiera type mismatch: expected Array and got #{parsed_answer.class}" unless parsed_answer.kind_of? Array or parsed_answer.kind_of? String
        answer ||= []
        answer << parsed_answer
      when :hash
        debug("Merging answer hash")
        raise Exception, "Hiera type mismatch: expected Hash and got #{parsed_answer.class}" unless parsed_answer.kind_of? Hash
        answer ||= {}
        answer = Backend.merge_answer(parsed_answer,answer)
      else
        debug("Assigning answer variable")
        answer = parsed_answer
        break
      end
    rescue NoMethodError
      raise Exception, "Resolution type is #{resolution_type} but parsed_answer is a #{parsed_answer.class}"
    end
  end

  answer
end

#parse_answer(key, data, scope, extra_data = {}) ⇒ Object 



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# File 'lib/hiera/backend/eyaml_backend.rb', line 60

def parse_answer(key, data, scope, extra_data={})
  if data.is_a?(Numeric) or data.is_a?(TrueClass) or data.is_a?(FalseClass)
    # Can't be encrypted
    data
  elsif data.is_a?(String)
    parsed_string = Backend.parse_string(data, scope)
    decrypt(key, parsed_string, scope)
  elsif data.is_a?(Hash)
    answer = {}
    data.each_pair do |key, val|
      answer[key] = parse_answer(key, val, scope, extra_data)
    end
    answer
  elsif data.is_a?(Array)
    answer = []
    data.each do |item|
      answer << parse_answer(key, item, scope, extra_data)
    end
    answer
  end
end

#warn(msg) ⇒ Object 



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# File 'lib/hiera/backend/eyaml_backend.rb', line 120

def warn(msg)
  Hiera.warn("[eyaml_backend]:  #{msg}")
end