instance method find_home

# File railties/lib/commands/plugin.rb, line 374
  def find_home
    ['HOME', 'USERPROFILE'].each do |homekey|
      return ENV[homekey] if ENV[homekey]
    end
    if ENV['HOMEDRIVE'] && ENV['HOMEPATH']
      return "#{ENV['HOMEDRIVE']}:#{ENV['HOMEPATH']}"
    end
    begin
      File.expand_path("~")
    rescue StandardError => ex
      if File::ALT_SEPARATOR
        "C:/"
      else
        "/"
      end
    end
  end