music folder cleanup

music.rb

#encoding: IBM437

require 'rake'
require 'fileutils'

task :clean, :folder do |t, args|
  Music.new(args.to_hash).cleanup
end

task :biggie, :folder do |t, args|
  Music.new(args.to_hash).show_by_size
end

class Music

  attr_reader :root

  def initialize opts
    @root = opts[:folder]
  end

  def cleanup
    cleanup_files
    cleanup_empty_folders
    show_weird_names
  end

  def show_by_size
    sort(biggie).each { |x| show x }
    sort(smalls).each { |x| show x }
  end

  def cleanup_files
    puts 'no dirty files found!!' if dirty_files.empty?

    dirty_files.each do |crap|
      FileUtils.remove_file crap, true
      puts "bye bye #{crap}"
    end
  end

  def cleanup_empty_folders
    puts 'no empty folders found!!' if empty_dirs.empty?

    until empty_dirs.empty?
      empty_dirs.each do |x|
        FileUtils.remove_dir x, true
        puts "bye bye #{x}"
      end
    end
  end

  def show_weird_names
    puts 'no weird names found!!' if weird_names.empty?

    weird_names.each do |x|
      puts x
      puts fix_name x
    end
  end

  def all; Dir["#{root}/**/*"] end
  def all_dirs; all.select { |x| File.directory? x } end
  def empty_dirs; all_dirs.select { |x| Dir.entries(x).length == 2 } end

  def dir_sizes; @dir_sizes ||= `du #{root} --max-depth=1 -h`.lines end
  def biggie; dir_sizes.select { |x| x.split[0].end_with? 'G' } end
  def smalls; dir_sizes.select { |x| x.split[0].end_with? 'M' } end
  def size dir; dir.split[0].to_f end
  def sort dirs; dirs.sort_by { |x| -size(x) } end
  def show dir; puts dir.gsub /#{root}\//, '' end

  def dirty_files; @dirty_files ||= (all_files - mp3s) end
  def all_files; all.reject { |x| File.directory? x } end
  def mp3s; Dir["#{root}/**/*.mp3"] end

  WEIRD = /[^\p{Alnum}\p{Space}\.\/\-&'\[\]\(\)\!\+_,#%^\$\@~\?\{\};`\=ëöüáéíóâñè]/
  def weird_names; all.select { |x| is_weird? x } end
  def is_weird? x; x.match WEIRD end
  def fix_name x; x.gsub WEIRD, '' end

end