remove blank lines from a file

vacuum.rb

##
#
# Remove blank lines from a file.
#
# Usage:
#
#     ruby vacuum.rb /path/to/file
#
module Vacuum
  def self.run(filepath)
    filename, filedir = File.basename(filepath), File.dirname(File.expand_path(filepath))
    # Save output to new file with 'clean-' prepended to name.
    file = File.open(File.join(filedir, "clean-#{filename}"), "w")
    # Read source file from path & copy non-blank lines to new file.
    File.foreach(filepath) { |line| file.print line if line.gsub(/\s/,'').size > 0 }
    file.close
  end
end

Vacuum.run(ARGV[0])