Examples:

Run `puts Rails.env` after loading the app:

  <%= executable %> 'puts Rails.env'

Run the Ruby file located at `path/to/filename.rb` after loading the app:

  <%= executable %> path/to/filename.rb

Run the Ruby script read from stdin after loading the app:
  <%= executable %> -

<% unless Gem.win_platform? %>
You can also use the runner command as a shebang line for your executables:

  #!/usr/bin/env <%= File.expand_path(executable) %>

  Product.all.each { |p| p.price *= 2 ; p.save! }
<% end %>