Maid rules

rules.rb

Maid.rules do

  ## Functions ##
  # Dupe detection thanks to bobthecow 
  def files(paths)
    dir(paths).select { |f| File.file?(f) }
  end
 
  def size_of(path)
    File.size(path)
  end
 
  def checksum_for(path)
    Digest::MD5.hexdigest(File.read(path))
  end
 
  def dupes_in(paths)
    dupes = []
    files(paths)                             # Start by filtering out non-files
      .group_by { |f| size_of(f) }           # ... then grouping by size, since that's fast
      .reject { |s, p| p.length < 2 }        # ... and filter out any non-dupes
      .map do |size, candidates|
        dupes += candidates
          .group_by { |p| checksum_for(p) }  # Now group our candidates by a slower checksum calculation
          .reject { |c, p| p.length < 2 }    # ... and filter out any non-dupes
          .values
      end
    dupes
  end

  ## Utilities ##
  rule 'Update yourself' do
    `cd ~/.maid && git pull`
  end

  ## Trash stuff ##
  rule 'Trash linux isos' do
    dir('~/Downloads/*.iso').each { |p| trash p }
  end

  # Thanks gsiener
  rule 'Trash downloaded software' do
    # These can generally be downloaded again very easily if needed...
    # but just in case, give me a few days before trashing them.
    dir('~/Downloads/*.{dmg,pkg}').each do |p|
      trash(p) if accessed_at(p) > 3.days.ago
    end

    osx_app_extensions = %w(app dmg pkg wdgt)
    osx_app_patterns = osx_app_extensions.map { |ext| (/\.#{ext}\/$/) }

    zips_with_osx_apps_inside = dir('~/Downloads/*.zip').select do |path|
      candidates = zipfile_contents(path)
      candidates.any? { |c| osx_app_patterns.any? { |re| c.match(re) } }
    end

    trash(zips_with_osx_apps_inside)
  end

  # Thanks bobthecow
  rule 'Trash duplicate downloads' do
    dupes_in('~/Downloads/*').each do |dupes|
      # Keep the dupe with the shortest filename
      trash dupes.sort_by { |p| File.basename(p).length }[1..-1]
 
      # You could also keep the oldest:
      # trash dupes.sort_by { |p| File.mtime(p) }[1..-1]
    end
  end

  ## Random cleanup ##
  rule 'Add mp3s' do
    dir('~/Downloads/*.mp3').each do |path|
      if duration_s(path) > 30.0
        move(path, '~/Music/iTunes/iTunes Media/Automatically Add to iTunes/')
      end
    end
  end

  rule 'Dropbox screenshots' do
    dir('~/Desktop/Screen shot *').each do |path|
      if 3.days.since?(last_accessed(path))
        move(path, '~/Dropbox/Screenshots/')
      end
    end
  end

  rule 'Dropbox powerpoints' do
    dir('~/Downloads/*.pptx').each do |path|
      move(path, '~/Dropbox/Powerpoints/')
    end
  end

  rule 'Dropbox PDFs' do
    dir('~/Downloads/*.pdf').each do |path|
      move(path, '~/Dropbox/PDFs/')
    end
  end
  
end