Rails - May 2009 - How to validate a patch submitted to rails core using .git

This is what I did.

I have Rails 2.3.2 installed.

rails demo
ruby script/generate scaffold User name:string
rake db:create
rake db:migrate
> ruby script/console
Loading development environment (Rails 2.3.2)
>> User.first
  User Load (0.3ms)   SELECT * FROM "users" LIMIT 1
=> nil
>> 

So far so good.

Now I will freeze rails.
> rake rails:freeze:gems
Try script/console again
>> User.first
  User Load (0.3ms)   SELECT * FROM "users" LIMIT 1
=> nil



Now I will get rid of frozen rails.
> rake rails:unfreeze
(in /Users/nkumar/dev/scratch/demo)
rm -rf vendor/rails


Now I will install rails from github so that later I could apply the
patch.
> git clone git://github.com/rails/rails.git
Now I will try script/console and I get error.
Loading development environment (Rails 2.3.2)
/Library/Ruby/Site/1.8/rubygems/requirement.rb:150:in
`parse'':ArgumentError: Illformed requirement ["~>
1.1.pre"]
/Library/Ruby/Site/1.8/rubygems/requirement.rb:150:in
`parse'':ArgumentError: Illformed requirement ["~>
1.1.pre"]
/Users/nkumar/dev/scratch/demo/vendor/rails/railties/lib/console_with_helpers.rb:5:NameError:
uninitialized constant ApplicationController
>> User.first
NameError: uninitialized constant User
  from (irb):1


Notice that I have not even applied the patch I want to test. I am just
getting ready to apply the patch.


If I look at vendor/rails I see following directories.
-rw-r--r--   1 nkumar  staff  3019 May 11 09:07 Rakefile
drwxr-xr-x   9 nkumar  staff   306 May 11 09:07 actionmailer
drwxr-xr-x  10 nkumar  staff   340 May 11 09:07 actionpack
drwxr-xr-x   7 nkumar  staff   238 May 11 09:07 activemodel
drwxr-xr-x  11 nkumar  staff   374 May 11 09:07 activerecord
drwxr-xr-x   8 nkumar  staff   272 May 11 09:07 activeresource
drwxr-xr-x  10 nkumar  staff   340 May 11 09:07 activesupport
drwxr-xr-x   8 nkumar  staff   272 May 11 09:07 ci
drwxr-xr-x   3 nkumar  staff   102 May 11 09:07 doc
-rwxr-xr-x   1 nkumar  staff   416 May 11 09:07 pushgems.rb
drwxr-xr-x  18 nkumar  staff   612 May 11 09:07 railties
-rwxr-xr-x   1 nkumar  staff   723 May 11 09:07 release.rb
drwxr-xr-x   3 nkumar  staff   102 May 11 09:07 tools



When I had done rake:rails:freeze then I had following directories.
drwxr-xr-x   9 nkumar  staff  306 May 11 09:09 actionmailer
drwxr-xr-x  10 nkumar  staff  340 May 11 09:09 actionpack
drwxr-xr-x  10 nkumar  staff  340 May 11 09:09 activerecord
drwxr-xr-x   7 nkumar  staff  238 May 11 09:09 activeresource
drwxr-xr-x   5 nkumar  staff  170 May 11 09:09 activesupport
drwxr-xr-x  16 nkumar  staff  544 May 11 09:09 railties


Can someone tell me what is the right way to test a patch.


I know Rails contribution guide has information on how to test a patch.
However the document tells you to checkout rails from github and then
apply a patch. I did. However how do I tell my demo app to use the newly
patch applied rails version. The only way I know of is to do
vendor/rails and ,as I illustrated above, that did not work for me.
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Thanks Frederick. I upgraded ro rubygems 1.3.3 and things are working 
fine.

Thank you.

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