Script to generate a Ruby glob that'll accept all files except those in a certain directory.

glob_gen.rb

puts "Please input a folder name: "
folder = gets.chomp
glob = "{"
prefix = ""
folder.each_char do |character|
  # We don't accept any strings that start with the prefix
  glob << "#{prefix}[^#{character}]*,"
  # Except the prefix itself
  glob << "#{prefix},"
  prefix << character
end

glob << "#{folder}?*"
glob << "}/**/*"
puts glob