Module: Rails::AppLoader

Extended by:
AppLoader
Included in:
AppLoader
Defined in:
railties/lib/rails/app_loader.rb

Overview

:nodoc:

Constant Summary collapse

RUBY = 
Gem.ruby
EXECUTABLES = 
["bin/rails", "script/rails"]
BUNDLER_WARNING = 
"Beginning in Rails 4, Rails ships with a `rails` binstub at ./bin/rails that\nshould be used instead of the Bundler-generated `rails` binstub.\n\nIf you are seeing this message, your binstub at ./bin/rails was generated by\nBundler instead of Rails.\n\nYou might need to regenerate your `rails` binstub locally and add it to source\ncontrol:\n\n rails app:update:bin           # Bear in mind this generates other binstubs\n                                # too that you may or may not want (like yarn)\n\nIf you already have Rails binstubs in source control, you might be\ninadvertently overwriting them during deployment by using bundle install\nwith the --binstubs option.\n\nIf your application was created prior to Rails 4, here's how to upgrade:\n\n  bundle config --delete bin    # Turn off Bundler's stub generator\n  rails app:update:bin          # Use the new Rails executables\n  git add bin                   # Add bin/ to source control\n\nYou may need to remove bin/ from your .gitignore as well.\n\nWhen you install a gem whose executable you want to use in your app,\ngenerate it and add it to source control:\n\n  bundle binstubs some-gem-name\n  git add bin/new-executable\n\n"

Instance Method Summary collapse

Instance Method Details

#exec_app ⇒ Object 



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# File 'railties/lib/rails/app_loader.rb', line 45

def exec_app
  original_cwd = Dir.pwd

  loop do
    if exe = find_executable
      contents = File.read(exe)

      if /(APP|ENGINE)_PATH/.match?(contents)
        exec RUBY, exe, *ARGV
        break # non reachable, hack to be able to stub exec in the test suite
      elsif exe.end_with?("bin/rails") && contents.include?("This file was generated by Bundler")
        $stderr.puts(BUNDLER_WARNING)
        Object.const_set(:APP_PATH, File.expand_path("config/application", Dir.pwd))
        require File.expand_path("../boot", APP_PATH)
        require "rails/commands"
        break
      end
    end

    # If we exhaust the search there is no executable, this could be a
    # call to generate a new application, so restore the original cwd.
    Dir.chdir(original_cwd) && return if Pathname.new(Dir.pwd).root?

    # Otherwise keep moving upwards in search of an executable.
    Dir.chdir("..")
  end
end

#find_executable ⇒ Object 



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# File 'railties/lib/rails/app_loader.rb', line 73

def find_executable
  EXECUTABLES.find { |exe| File.file?(exe) }
end