How bad can we make a makefile tree?

makehammer40k.rb

#!/usr/bin/env ruby

File.open("Makefile","w") do |f|

  targets = (1..6).to_a.repeated_permutation(6).map{|a| "t#{a.join}"}.join(" ")
  f.puts("all: #{targets}\n\n")

  (1..6).each do |root_target|
    f.puts "t#{root_target}:\n"
    f.puts "\tmkdir -p o#{root_target}\n"
    f.puts "\techo #{root_target} > ./o#{root_target}/seed.txt\n\n"
  end

  (2..6).each do |depth|
    (1..6).to_a.repeated_permutation(depth).each do |p|
      f.puts "t#{p.join}: t#{p[0..-2].join}\n"
      dir = p.map{|i| "o#{i}"}.join("/")
      parent_dir = p[0..-2].map{|i| "o#{i}"}.join("/")
      digit = p[-1]
      f.puts "\tmkdir -p #{dir}\n"
      f.puts "\tcat #{parent_dir}/seed.txt | sed 's/$$/#{digit}/' > #{dir}/seed.txt\n\n"
    end
  end

end