ARGV << '--help' if ARGV.empty? aliases = { "g" => "generate", "d" => "destroy", "c" => "console", "s" => "server", "db" => "dbconsole", "r" => "runner" } help_message = <<-EOT Usage: rails COMMAND [ARGS] The most common rails commands are: generate Generate new code (short-cut alias: "g") console Start the Rails console (short-cut alias: "c") server Start the Rails server (short-cut alias: "s") dbconsole Start a console for the database specified in config/database.yml (short-cut alias: "db") new Create a new Rails application. "rails new my_app" creates a new application called MyApp in "./my_app" In addition to those, there are: application Generate the Rails application code destroy Undo code generated with "generate" (short-cut alias: "d") plugin new Generates skeleton for developing a Rails plugin runner Run a piece of code in the application environment (short-cut alias: "r") All commands can be run with -h (or --help) for more information. EOT command = ARGV.shift command = aliases[command] || command case command when 'generate', 'destroy', 'plugin' require 'rails/generators' if command == 'plugin' && ARGV.first == 'new' require "rails/commands/plugin_new" else require APP_PATH Rails.application.require_environment! Rails.application.load_generators require "rails/commands/#{command}" end when 'console' require 'rails/commands/console' options = Rails::Console.parse_arguments(ARGV) # RAILS_ENV needs to be set before config/application is required ENV['RAILS_ENV'] = options[:environment] if options[:environment] # shift ARGV so IRB doesn't freak ARGV.shift if ARGV.first && ARGV.first[0] != '-' require APP_PATH Rails.application.require_environment! Rails::Console.start(Rails.application, options) when 'server' # Change to the application's path if there is no config.ru file in current directory. # This allows us to run `rails server` from other directories, but still get # the main config.ru and properly set the tmp directory. Dir.chdir(File.expand_path('../../', APP_PATH)) unless File.exists?(File.expand_path("config.ru")) require 'rails/commands/server' Rails::Server.new.tap do |server| # We need to require application after the server sets environment, # otherwise the --environment option given to the server won't propagate. require APP_PATH Dir.chdir(Rails.application.root) server.start end when 'dbconsole' require 'rails/commands/dbconsole' Rails::DBConsole.start when 'application', 'runner' require "rails/commands/#{command}" when 'new' if %w(-h --help).include?(ARGV.first) require 'rails/commands/application' else puts "Can't initialize a new Rails application within the directory of another, please change to a non-Rails directory first.\n" puts "Type 'rails' for help." exit(1) end when '--version', '-v' ARGV.unshift '--version' require 'rails/commands/application' when '-h', '--help' puts help_message else puts "Error: Command '#{command}' not recognized" if %x{rake #{command} --dry-run 2>&1 } && $?.success? puts "Did you mean: `$ rake #{command}` ?\n\n" end puts help_message exit(1) end