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rails--rails/railties/lib/rails/app_loader.rb
2017-07-01 18:35:43 +09:00

64 lines
2 KiB
Ruby

require "pathname"
require_relative "version"
module Rails
module AppLoader # :nodoc:
extend self
RUBY = Gem.ruby
EXECUTABLES = ["bin/rails", "script/rails"]
BUNDLER_WARNING = <<EOS
Looks like your app's ./bin/rails is a stub that was generated by Bundler.
In Rails #{Rails::VERSION::MAJOR}, your app's bin/ directory contains executables that are versioned
like any other source code, rather than stubs that are generated on demand.
Here's how to upgrade:
bundle config --delete bin # Turn off Bundler's stub generator
rails app:update:bin # Use the new Rails 5 executables
git add bin # Add bin/ to source control
You may need to remove bin/ from your .gitignore as well.
When you install a gem whose executable you want to use in your app,
generate it and add it to source control:
bundle binstubs some-gem-name
git add bin/new-executable
EOS
def exec_app
original_cwd = Dir.pwd
loop do
if exe = find_executable
contents = File.read(exe)
if contents =~ /(APP|ENGINE)_PATH/
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_relative "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
def find_executable
EXECUTABLES.find { |exe| File.file?(exe) }
end
end
end