Generate graph of dependency for scss stylesheets

dependencies.rb

#!/usr/bin/env ruby
#
# Generate a graph of dependencies for your stylesheets.
#
# Requires graphviz
#
# Run `ruby dependencies.rb | fdp -Tpng > out.png; open out.png`

PATH = "app/assets/stylesheets/"

puts "digraph stylesheets {"
Dir.glob("#{PATH}**/*.scss").each do |file|
  human_file = file.gsub('app/assets/stylesheets/', '').gsub('.css.scss', '')
  human_dir  = human_file.split('/')[0..-2].join('/')

  content = File.open(file).each_line do |line|
    dependency = nil

    if line["@import"]
      dependency = line[/["'].+["']/][1..-2]
    end

    if line["//= require"]
      dependency = line.gsub("//= require", "").strip
    end

    if dependency
      puts %|"#{human_file}" -> "#{[human_dir, dependency].reject { |f| f.nil? || f == "" }.join("/")}";|;
    end
  end
end
puts "}"