Basic Rails task to initialize the secrets.rb

bootstrap.rake

require 'ostruct'

namespace :bootstrap do

  desc "Boostrap development machine"
  task :setup do
    Rake::Task['bootstrap:secrets'].invoke
  end

  task :secrets do
    default_save_dir = "config/initializers"
    save_path = File.join(ENV['SECRETS_DIR'] || default_save_dir, "secret_token.rb")

    if File.exists? save_path
      warning "#{save_path} already exists"
    else
      cipher = OpenSSL::Cipher.new('aes-256-cbc')
      render(
        "secret_token.rb.erb",
        save_path,
        secret_token: SecureRandom.hex(64)
      )
      info "#{save_path} file generated"
    end
  end

  def render(template, save_path, vars)
    template_file = File.open("lib/templates/#{template}", 'r').read
    erb = ERB.new(template_file)
    results = erb.result(OpenStruct.new(vars).instance_eval { binding  })
    File.open(save_path, 'w+') { |file| file.write(results) }
  end

  def colorize(text, color_code)
    "\e[#{color_code}m#{text}\e[0m"
  end

  def error(text); puts "[#{red "ERROR"}] #{text}"; end
  def warning(text); puts "[#{yellow "WARNING"}] #{text}"; end
  def info(text); puts "[#{cyan "INFO"}] #{text}"; end
  def debug(text); puts "[#{green "DEBUG"}] #{text}"; end

  def red(text); colorize(text, 31); end
  def green(text); colorize(text, 32); end
  def yellow(text); colorize(text, 33); end
  def cyan(text); colorize(text, 36); end

end

secret_token.rb.erb

MyApp::Application.config.tap do |config|
  config.secret_token = '<%= secret_token %>'
end