Module: Datumfactory::Config::Yaml

Defined in:
lib/datumfactory/config/yaml.rb

Constant Summary collapse

DISALLOWED_KEYS = 
[:'config.path'].freeze

Class Method Summary collapse

Class Method Details

.dotify_keys(hash, key_prefix = nil) ⇒ Object 



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# File 'lib/datumfactory/config/yaml.rb', line 57

def self.dotify_keys(hash, key_prefix = nil)
  {}.tap do |new_hash|
    hash.each_pair do |k,v|
      k = [key_prefix, k].compact.join('.')
      if v.kind_of?(Hash)
        new_hash.update(dotify_keys(v, k))
      else
        next if DISALLOWED_KEYS.include?(k.to_sym)

        new_hash[k.to_sym] = v
      end
    end
  end
end

.load_yaml(path) ⇒ Object 



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# File 'lib/datumfactory/config/yaml.rb', line 27

def self.load_yaml(path)
  begin
    yaml = YAML.load(ERB.new(path.read).result)
  rescue => e
    config_error = ConfigError.new(e.to_s)

    if e.backtrace
      backtrace = e.backtrace.map do |line|
        if line.start_with?('(erb)'.freeze)
          line.gsub('(erb)'.freeze, path.to_s)
        else
          line
        end
      end
      config_error.set_backtrace(backtrace)
    end

    raise config_error
  end

  case yaml
  when Hash
    yaml
  when NilClass, FalseClass
    {}
  else
    raise ConfigError, "The configuration file #{path} is invalid."
  end
end

.new(path, env = 'production') ⇒ Object 



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# File 'lib/datumfactory/config/yaml.rb', line 10

def self.new(path, env = 'production')
  path = path.kind_of?(Pathname) ? path : Pathname.new(path)

  if !path.exist?
    raise ConfigError, "The configuration file #{path} was not found."
  elsif !path.file?
    raise ConfigError, "The configuration file #{path} is not a file."
  elsif !path.readable?
    raise ConfigError, "The configuration file #{path} is not readable."
  end

  yaml = load_yaml(path)
  yaml.merge!(yaml[env]) if yaml[env].kind_of?(Hash)

  dotify_keys(yaml)
end