Gem 1.3 does not work out of the box on windows.

Here is what happens:

C:\>gem update
Updating installed gems
ERROR:  While executing gem ... (NoMethodError)
    undefined method `uid' for nil:NilClass

The problem is in C:\ruby\lib\ruby\site_ruby\1.8\rubygems.rb, line 713:

"if 0 == File.expand_path(path).index(Gem.user_home) and Etc.getpwuid.uid != File::Stat.new(Gem.user_home).uid
then"

Which should be replaced with:

"if 0 == File.expand_path(path).index(Gem.user_home) and !Gem.win_platform? and Etc.getpwuid.uid
!= File::Stat.new(Gem.user_home).uid then"

Then everything works as expected.

Date: 2009-04-26 17:48
Sender: Dustin Carver

This is happening to me in 1.3.2, on Windows.

Date: 2008-10-29 16:23
Sender: Luis Lavena

Thank you for reporting this.

This is actually fixed in RubyGems 1.3.1 and should be available
to you in the form of zip package.

Please follow the instructions here:

http://blog.mmediasys.com/2008/08/04/problems-with-rubygems-find-
here-some-handy-tips/

HTH,
--
Luis Lavena