Rails 啟動過程

1 啟動！

1. call ruby rails in RVM folder => railties/bin/rails => require "rails/cli"
2. railties/lib/rails/app_rails_loader.rb : find ‘bin/rails’
3. bin/rails: require_relative '../config/boot and require 'rails/commands'
4. config/boot.rb: setting Bundler, Gemfile
5. rails/commands.rb: setting aliases, require 'rails/commands/commands_tasks'
6. rails/commands/command_tasks.rb: run command, => rails/commands/server => require ‘fileutils, ‘optparse', ‘action_dispatch’, require 'rails'
7. actionpack/lib/action_dispatch.rb: response routes
8. rails/commands/server.rb: inherited from Rack::Server: call Rack::Server’s initialize。
9. Rack: lib/rack/server.rb: provide interface for app on rack base, => setting options
10. config/application.rb: app settings
11. Rails::Server#start: still will call Rack::Server.start
12. config/environment.rb
13. config/application.rb => require ‘rails/all'

2 載入 Rails

1. railties/lib/rails/all.rb
2. config/environment.rb
3. railties/lib/rails/application.rb: initialize!
4. Rack: lib/rack/server.rb