Cleanest/One-liner way to require all files in directory in Ruby?

Question

When creating gems, I often have a directory structure like this:

|--lib
    |-- helpers.rb
    `-- helpers
        |-- helper_a.rb
        `-- helper_b.rb

Inside the helpers.rb, I'm just require-ing the files in the helpers directory. But I have to do things like this:

$:.push(File.dirname(__FILE__) + '/helpers')
require 'helper_a'
require 'helper_b'

Is there a way to make that one line so I never have to add to it? I just came up with this real quick:

dir = File.join(File.dirname(__FILE__), "helpers")
Dir.entries(dir)[2..-1].each { |file| require "#{dir}/#{file[0..-4]}" }

But it's two lines and ugly. What slick tricks have you done to make this a one liner?

Duplicate of http://stackoverflow.com/questions/735073/best-way-to-require-all-files-from-a-directory-in-ruby - use `Dir["/path/to/directory/*.rb"].each {|file| require file }` — Marcel Jackwerth, Mar 21 '10 at 19:13
Even nicer, use the require_all gem mentioned in that question. — clacke, Jun 09 '11 at 08:36

sepp2k · Accepted Answer · 2012-10-13T08:33:37.153

57

project_root = File.dirname(File.absolute_path(__FILE__))
Dir.glob(project_root + '/helpers/*') {|file| require file}

Or to golf it a bit more:

Dir.glob(project_root + '/helpers/*', &method(:require))

edited Oct 13 '12 at 08:33

answered Mar 21 '10 at 19:13

sepp2k

I wouldn't have thought about method#to_proc, nice! – severin Mar 22 '10 at 16:18
I would've require to understand wildcards... but +1 and thanks for the time you've save me... :D – Stefan Dec 09 '10 at 11:49
1

@Yasky It didn't, but now it does (had to stick a call to `absolute_path` in there) – sepp2k Oct 13 '12 at 08:34

score 3 · Answer 2 · answered Oct 11 '14 at 23:08

I like require_relative:

Dir.glob('lib/**/*.rb') { |f| require_relative f }

The `&method(:require_relative) trick won't work with require_relative. I get:

`require_relative': cannot infer basepath (LoadError)

But it does save the hassle of computing project_root

I'm using ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-darwin12.5.0]

score 1 · Answer 3 · answered Mar 08 '17 at 14:03

1

# helpers.rb
Dir[__dir__ + '/helpers/*'].each &method(:require)

answered Mar 08 '17 at 14:03

Lev Lukomsky

score 0 · Answer 4 · edited Dec 31 '11 at 17:26

0

Hi the cleanest way I have discovered is to use Dir.glob with wild cards.

Put the following in your rakefile:

gem.files = Dir.glob('lib/**/ *.rb')

It should work a treat.

edited Dec 31 '11 at 17:26

Bill the Lizard

answered Dec 31 '11 at 16:56

WebDevMonk

2

This did not answer the question about using require. – phatmann Aug 01 '12 at 13:49

4 Answers4