sort your gemfile lol

gemfile_sort.rb

file = File.read("test.gemfile")

open_group = false 
default_groups = [:general]
current_groups = default_groups 

gem_groups = {}
gems = {}

file.split("\n").each do |line|
  next if line.empty? || line.index("end") # || line.index("gem").nil? || line.index("group").nil? 
  if line.index("group")
    new_groups = line.scan(%r{:(\w*)}).flatten.map(&:to_sym)
    current_groups = new_groups 
  elsif line.index("end")
    current_groups = default_groups
  end

  name = line.scan(%r{gem .([a-zA-Z\-_]*).}).flatten.first 
  if name
    current_groups.each do |g|
      gems[name] ||= {:line => line}
      gems[name][:groups] ||= [g]
      gems[name][:groups] << g
      gems[name][:groups].uniq!
    end
  end

end

puts gems
groups = gems.map { |k,v| v[:groups] }.uniq

groups.each do |group|
  gems_in_group = gems.select { |k,v| v[:groups] == group }.sort_by { |k,v| k }
  if group == [:general]
    puts gems.delete('rails')[:line]
    gems_in_group.each do |k,v|
      puts v[:line]
      next
    end
    next 
  end
  
  puts ""
  line = "group "
  group.each do |g|
    line += ":#{g}, "
  end
  line = line[0...-2]
  line += " do"
  puts line 
  gems_in_group.each do |k,v|
    puts "  " + v[:line]
  end
  puts "end"
end