Actualizar Rails a 3.0.5

Snow Leopard viene con Rails 2.3.5 instalado, cuando la versión más reciente, a fecha de hoy, es la 3.0.5.

$ rails -v
Rails 2.3.5

Para actualizar la versión de Rails no basta con actualizar únicamente Rails, también hay que actualizar RubyGems, el sistema de gemas o packages de ruby.

RubyGems

La actualización de RubyGems es tan sencilla como abrir un terminal y ejecutar

sudo gem update --system

El sistema os pedirá la contraseña de un usuario administrador. El resultado tiene que ser algo como esto:

Updating RubyGems
Updating rubygems-update
Successfully installed rubygems-update-1.6.2
Updating RubyGems to 1.6.2
Installing RubyGems 1.6.2
RubyGems 1.6.2 installed

=== 1.6.2 / 2011-03-08

Bug Fixes:

* require of an activated gem could cause activation conflicts.  Fixes
  Bug #29056 by Dave Verwer.
* `gem outdated` now works with up-to-date prerelease gems.

------------------------------------------------------------------------------

RubyGems installed the following executables:
	/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/gem

Rails

Una vez actualizado RubyGems, para actualizar Rails bastará con ejecutar, en el mismo terminal

sudo gem install rails

Si hace mucho que habéis ejecutado la llamada anterior o estáis en otro terminal es posible que os vuelvan a pedir la contraseña de administrador. El resultado tiene que ser algo como esto:

Fetching: activesupport-3.0.5.gem (100%)
Fetching: i18n-0.5.0.gem (100%)
Fetching: activemodel-3.0.5.gem (100%)
Fetching: rack-1.2.2.gem (100%)
Fetching: rack-test-0.5.7.gem (100%)
Fetching: rack-mount-0.6.14.gem (100%)
Fetching: tzinfo-0.3.25.gem (100%)
Fetching: abstract-1.0.0.gem (100%)
Fetching: erubis-2.6.6.gem (100%)
Fetching: actionpack-3.0.5.gem (100%)
Fetching: arel-2.0.9.gem (100%)
Fetching: activerecord-3.0.5.gem (100%)
Fetching: activeresource-3.0.5.gem (100%)
Fetching: polyglot-0.3.1.gem (100%)
Fetching: treetop-1.4.9.gem (100%)
Fetching: mail-2.2.15.gem (100%)
Fetching: actionmailer-3.0.5.gem (100%)
Fetching: thor-0.14.6.gem (100%)
Fetching: railties-3.0.5.gem (100%)
Fetching: bundler-1.0.10.gem (100%)
Fetching: rails-3.0.5.gem (100%)
Successfully installed activesupport-3.0.5
Successfully installed i18n-0.5.0
Successfully installed activemodel-3.0.5
Successfully installed rack-1.2.2
Successfully installed rack-test-0.5.7
Successfully installed rack-mount-0.6.14
Successfully installed tzinfo-0.3.25
Successfully installed abstract-1.0.0
Successfully installed erubis-2.6.6
Successfully installed actionpack-3.0.5
Successfully installed arel-2.0.9
Successfully installed activerecord-3.0.5
Successfully installed activeresource-3.0.5
Successfully installed polyglot-0.3.1
Successfully installed treetop-1.4.9
Successfully installed mail-2.2.15
Successfully installed actionmailer-3.0.5
Successfully installed thor-0.14.6
Successfully installed railties-3.0.5
Successfully installed bundler-1.0.10
Successfully installed rails-3.0.5
21 gems installed
Installing ri documentation for activesupport-3.0.5...
Installing ri documentation for i18n-0.5.0...
Installing ri documentation for activemodel-3.0.5...
Installing ri documentation for rack-1.2.2...
Installing ri documentation for rack-test-0.5.7...
Installing ri documentation for rack-mount-0.6.14...
Installing ri documentation for tzinfo-0.3.25...
Installing ri documentation for abstract-1.0.0...
Installing ri documentation for erubis-2.6.6...
Installing ri documentation for actionpack-3.0.5...
Installing ri documentation for arel-2.0.9...
Installing ri documentation for activerecord-3.0.5...
Installing ri documentation for activeresource-3.0.5...
Installing ri documentation for polyglot-0.3.1...
Installing ri documentation for treetop-1.4.9...
Installing ri documentation for mail-2.2.15...
Installing ri documentation for actionmailer-3.0.5...
Installing ri documentation for thor-0.14.6...
Installing ri documentation for railties-3.0.5...
Installing ri documentation for bundler-1.0.10...
Installing ri documentation for rails-3.0.5...

Si todo ha ido bien, rails -v os mostrará la versión correcta.

$ rails -v
Rails 3.0.5