Class: RailsConfig::Settings

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/rails_config/settings.rb

Class Method Summary collapse

Class Method Details

.load(options = {}) ⇒ Object 



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# File 'lib/rails_config/settings.rb', line 10

def self.load(options={})

  # sorry, you must supply the source_dir
  raise "options must contain :source_dir" unless options[:source_dir]

  opts={
    log_debug: false,
    #source_dir: File.expand_path("..", __FILE__),
    environment: 'development',
    output_file: nil
  }.merge(options)

  # Load various settings files
  puts "[#{self.name}] Loading application settings from files in #{opts[:source_dir]}" if opts[:log_debug]
  setting_files=Dir.glob(File.join(opts[:source_dir], '*.yml')).map { |p| File.new(p) }.inject({}) { |h, f| h[File.basename(f).downcase.split(/(.*)[.]yml/).join]=f; h }
  settings=Hash.new
  setting_files.each_pair do |key, file|
    puts "[#{self.name}] Loading #{key} settings from file #{file.path}" if opts[:log_debug]
    settings[key]=YAML.load_file(file)[opts[:environment]]
    if (env=YAML.load_file(file)['env'])
      env.keys.each do |k|
        if (env_var=ENV[k.to_s.upcase])
          value=env[k]['with'] || :to_s
          value=[value] unless value.is_a?(Array)
          value=value.inject(env_var) { |v, m| eval("v.#{m}") }
          value_hash=(env[k]['to'] || k.downcase.slice("#{File.basename(file)}_")).split('/').reverse.reduce(value) { |r, e| {e => r} }
          settings[key].deep_merge!(value_hash)
        end
      end
    end
  end

  # Write out the loaded settings if an output file is specified
  if opts[:output_file]
    hash=settings.deep_stringify_keys
    method=hash.respond_to?(:ya2yaml) ? :ya2yaml : :to_yaml
    yaml_string=hash.deep_stringify_keys.send(method)
    yaml_string.gsub("!ruby/symbol ", ":").sub("---", "").split("\n").map(&:rstrip).join("\n").strip
    begin
      File.open(opts[:output_file], 'w') do |f|
        puts "[#{self.name}] Writing application settings to #{f.path}" if opts[:log_debug]
        f.write(yaml_string)
        f.close
      end
    rescue Exception => ex
      puts ex.message
      puts ex.backtrace.join("\n")
    end
  end

  RecursiveOpenStruct.new(settings)

end