Flatten files in sub-directories into single directory

flatten

#!/usr/bin/env ruby

require 'pathname'
require 'fileutils'

pwd = Pathname.pwd

begin
  source = Pathname.new(ARGV[0].nil? ? pwd : ARGV[0]).realpath
  destination = Pathname.new(ARGV[1].nil? ? pwd: ARGV[1]).realpath
rescue Errno::ENOENT
  abort 'Usage: flatten [source-path] [destination-path]'
end

source.glob('**/*').each do |source_path|
  next unless source_path.file?
  relative_path = source_path.relative_path_from(pwd)
  flattened_path = relative_path.each_filename.drop_while { |s| s.to_s == '.' }.map(&:to_s).join(' - ')
  target_path = destination.join(flattened_path)
  next if target_path.exist?
  puts "#{relative_path} -> #{flattened_path}"
  FileUtils.cp source_path, target_path
end

I think I used this to process files exported from iCloud photos.