lib/common/filesystem.rb

   1 # Convenience methods for working with the filesystem. This class
   2 # only provides static methods, to be used analogously to the File
   3 # class (for example, <tt>File.directory?</tt>).
   4 #
   5 class Filesystem
   6
   7   # Return whether or not the given path begins with a dot (ASCII
   8   # period).
   9   #
  10   # @param path [String] the path whose first character you want to check.
  11   #
  12   # @return [Boolean] whether or not *path* begins with an ASCII period.
  13   #
  14   def self.begins_with_dot?(path)
  15     return (path[0..0] == '.')
  16   end
  17
  18
  19   # Get a list of all real subdirectories of the given directory.
  20   #
  21   # @param dir [String] the directory whose subdirectories you want.
  22   #
  23   # @return [Array<String>] a list of subdirectories of *dir*, not
  24   #   including the pseudo-directories "." and ".." (the current/parent
  25   #   directories).
  26   #
  27   def self.get_subdirs(dir)
  28     subdirs = []
  29     return subdirs if not File.directory?(dir)
  30
  31     Dir.open(dir) do |d|
  32       d.each do |entry|
  33         relative_path = File.join(dir, entry)
  34         if File.directory?(relative_path) and not self.begins_with_dot?(entry)
  35           subdirs << entry
  36         end
  37       end
  38     end
  39
  40     return subdirs
  41   end
  42
  43 end