What's the Rails.root equivalent in a Rack application?

Question

I'm familiar with the Rails.root in Rails which tells you the directory of your current application. This is quite handy sometimes.

Now I'm developing a Rack application (on which Rails is based). How do I find out the Rails.root equivalent for a Rack application?

Thank you.

Answer 1

This returns the root directory in a string.

Rack::Directory.new('').root

Not sure if there's a better, shorter syntax.

Answer 2

What worked for me is a simple File.expand_path:

File.expand_path(File.join("log", "some_file_#{ENV["RACK_ENV"] || "development"}.log"))