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require 'pathname'
module Rails
module AppRailsLoader
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 4, 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
rake rails:update:bin # Use the new Rails 4 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_rails
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 '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) and 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
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