From: Erik Veenstra <erikveen@...>
Date: 2007-02-08T19:52:41+09:00
Subject: Re: method to get (Linux) user home path

These are my personal implementations of Dir.home and Dir.temp.

I added some examples as well.

gegroet,
Erik V. - http://www.erikveen.dds.nl/

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 class Dir
   def self.home(*args, &block)
     dir = nil

     dir ||= ENV["HOME"]
     dir ||= ENV["USERPROFILE"]
     dir ||= "c:/"

     handle_home_and_temp(dir, *args, &block)
   end

   def self.temp(*args, &block)
     dir = nil

     dir ||= ENV["TMPDIR"]
     dir ||= ENV["TMP"]
     dir ||= ENV["TEMP"]
     dir ||= "/tmp"

     handle_home_and_temp(dir, *args, &block)
   end

   private

   def self.handle_home_and_temp(dir, *args, &block)
     file        = File.join(*args)
     file        = file.gsub(/\\/, "/")
     file        = file.gsub(/\/+/, "/")
     file        = file.gsub(/^\/+/, "")
     file        = file.gsub(/\/+$/, "")

     dir         = dir.gsub(/\\/, "/")
     dir         = dir.gsub(/\/+/, "/")
     dir         = dir.gsub(/\/+$/, "")
     dir         = File.expand_path(file, dir)

     res         = dir

     if block
       pdir      = Dir.pwd

       Dir.chdir(dir)    # Ruby 1.6 doesn't handle Dir.chdir(&block).
         res     = block.call(res)
       Dir.chdir(pdir)
     end

     res
   end
 end

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 p Dir.home
 p Dir.home{Dir.pwd}
 p Dir.home("a", "b")
 p Dir.home("a", "b"){Dir.pwd}

 p Dir.temp
 p Dir.temp{Dir.pwd}
 p Dir.temp("c", "d")
 p Dir.temp("c", "d"){Dir.pwd}

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