Get parent directory of current directory in Ruby
RubyDirectoryRuby Problem Overview
I understand I can get current directory by
$CurrentDir = Dir.pwd
How about parent directory of current directory?
Ruby Solutions
Solution 1 - Ruby
File.expand_path("..", Dir.pwd)
Solution 2 - Ruby
Perhaps the simplest solution:
puts File.expand_path('../.')
Solution 3 - Ruby
I think an even simpler solution is to use File.dirname:
2.3.0 :005 > Dir.pwd
=> "/Users/kbennett/temp"
2.3.0 :006 > File.dirname(Dir.pwd)
=> "/Users/kbennett"
2.3.0 :007 > File.basename(Dir.pwd)
=> "temp"
File.basename returns the component of the path that File.dirname does not.
This, of course, works only if the filespec is absolute and not relative. To be sure to make it absolute one could do this:
2.3.0 :008 > File.expand_path('.')
=> "/Users/kbennett/temp"
2.3.0 :009 > File.dirname(File.expand_path('.'))
=> "/Users/kbennett"
Solution 4 - Ruby
In modern Ruby you should definitely use Pathname.
Pathname.getwd.parent