path-dependencies

Ruby gem for defining which binaries/commands must be available on the PATH in order for your Rails application to function properly.

Add this line to your application's Gemfile:

gem 'path-dependencies'

And then execute:

$ bundle install

Define a path_dependencies array in config/application.rb like so:

class Application < Rails::Application
  config.path_dependencies = [
    "dos2unix",
    "free",
    "ngrok",
    "node",
    "sox",
    "wget",
    "youtube-dl"
  ]
end

When your Rails application starts, an error will be raised immediately if any binaries/commands are not available on the PATH. A nice precautionary measure!

If you find this gem useful, you may also like env-dependencies.