From scratch you must do the following steps. From there, follow the commit history to see the changes that were made.
$ gem -v
# If less than version 1.3.5 upgrade it:
$ sudo gem update --system
$ gem install haml
$ gem install compass
Build the app:
$ rails compass-rails-sample-application
$ cd compass-rails-sample-application
$ haml --rails .
$ compass --rails -f blueprint .
Compass recommends that you keep your stylesheets in app/stylesheets
instead of the Sass default location of public/stylesheets/sass.
Is this OK? (Y/n) y
Compass recommends that you keep your compiled css in public/stylesheets/compiled/
instead the Sass default of public/stylesheets/.
However, if you're exclusively using Sass, then public/stylesheets/ is recommended.
Emit compiled stylesheets to public/stylesheets/compiled/? (Y/n) y
directory ./public/stylesheets/compiled/
directory ./app/stylesheets/
create ./config/initializers/compass.rb
create ./app/stylesheets/screen.sass
create ./app/stylesheets/print.sass
create ./app/stylesheets/ie.sass
create ./public/images/grid.png
Congratulations! Your rails project has been configured to use Compass. Sass will automatically compile your stylesheets during the next page request and keep them up to date when they change. Make sure you restart your server!
Next add these lines to the head of your layouts:
%head
= stylesheet_link_tag 'compiled/screen.css', :media => 'screen, projection'
= stylesheet_link_tag 'compiled/print.css', :media => 'print'
/[if IE]
= stylesheet_link_tag 'compiled/ie.css', :media => 'screen, projection'
(You are using haml, aren't you?)