directory to src_group

do.rb

groups = {}

Dir['**/*'].each do |f|
  s = File.split(f)
  dir = s[0]
  groups[dir] = [] if !groups[dir]
  groups[dir] << s[1]
end

groups.each do |k, v|
  puts "src_group(\"#{k.gsub('/', '~')}\" sources"
  v.each do |f|
    puts "    #{k}/#{f}"
  end
  puts ")"
end