ruby-on-rails – 使用capistrano部署时隐藏mysql2密码的好方法

load 'deploy/assets'
require "bundler/capistrano" 
set :application,"XXXXXX"
set :repository,"XXXXXX"

set :scm,:git # You can set :scm explicitly or Capistrano will make an intelligent guess based on known version control directory names
# Or: `accurev`,`bzr`,`cvs`,`darcs`,`git`,`mercurial`,`perforce`,`subversion` or `none`
set :repository,"XXXXXX"

role :web,"XXXXXX"                          # Your HTTP server,Apache/etc
role :app,"XXXXXX"                          # This may be the same as your `Web` server
role :db,"XXXXXX",:primary => true # This is where Rails migrations will run
#role :db,"your slave db-server here"

set :user,'root'
set :use_sudo,false
set :deploy_to,"/var/www/#{application}"
set :deploy_via,:remote_cache
set :normalize_asset_timestamps,false

# if you want to clean up old releases on each deploy uncomment this:
# after "deploy:restart","deploy:cleanup"

# if you're still using the script/reaper helper you will need
# these http://github.com/rails/irs_process_scripts

# If you are using Passenger mod_rails uncomment this:
namespace :deploy do

  task :start do ; end
  task :stop do ; end
  task :restart,:roles => :app,:except => { :no_release => true } do
    run "touch #{File.join(current_path,'tmp','restart.txt')}"
  end
end

现在,当我运行cap deploy时,我得到一个错误

Access denied for user 'root'@'localhost' (using password: NO)

我假设那是因为我的database.yml文件是

development:
  adapter: sqlite3
  database: db/development.sqlite3
  pool: 5
  timeout: 5000

# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
  adapter: sqlite3
  database: db/test.sqlite3
  pool: 5
  timeout: 5000

production:
    adapter: mysql2
    encoding: utf8
    database: XXXXX
    username: root
    password: 
    socket: /tmp/mysql.sock

现在,因为我有一个公共github帐户.我不想传递我的密码并将其发布到github.如果我没有传递密码,我无法部署应用程序.

处理这个问题的好方法是什么？

谢谢