Assets pre-commit precompile

gistfile1.rb

#!/usr/bin/env ruby

assets = `git diff --cached --name-only`.split("\n").find_all{ |file| file =~ /\.(css|js)$/ }

unless assets.empty? 
  puts "You've changed some of asset files. Building..."
  files = `bundle exec rake asset:packager:build_all`.split("\n")[1..-1].map{ |f| f.gsub(/^Created (\/.*\.(css|js))$/, "\\1") }
  `git add #{files.join(" ")}`
end

exit 0