The following tutorial describes how to delete files and directories that you no longer need in your application. Removing a single file in Ruby is simple and straightforward, with
File.delete. This method Deletes the named files, returning the number of names passed as arguments. Raises an exception on any error.
File.delete(path_to_file) if File.exist?(path_to_file)
Removing a directory tree is also straightforward and simple with
FileUtils.remove_dir, which recursively deletes the contents of a directory. This method ignores StandardError if force(second parameter) is true.
FileUtils.remove_dir(path_to_directory) if File.directory?(path_to_directory)
Ruby provides several methods for removing directories, but mostly we use remove_dir. Dir.delete and FileUtils.rmdir will only work if the directory is already empty. The rm_r and rm_rf defined in FileUtils are similar to remove_dir.