Gumby Framework in Rails Project - File to import not found

Question

I have a simple rails project (ruby 1.9.3, rails 3.2.13), and I am attempting to incorporate the Gumby CSS Framework. The framework requires Compass, with modular-scale.

For sake of completeness the majority of the post contains information, skip to the end for the actual problem.

The working directory is being watched with

$ compass watch`

Compass was incorporated into the project with:

compass create --app rails \
    -l ./app/assets/stylesheets/gumby/ \
    --using modular-scale

The contents of config/compass.rb is:

require 'modular-scale'
project_type = :rails

And the location of Gumby source (SCSS) is app/assets/stylesheets/gumby.

The resulting compiled css appears in public/assets/gumby/gumby.css.

The following is within my Gemfile

group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'compass-rails'
  gem 'coffee-rails', '~> 3.2.1'
  gem 'modular-scale'
  gem 'gumby-rails'
  gem 'uglifier', '>= 1.0.3'
end

And bundle install completes without errors.

However...

The following error message appears on all served pages:

Sass::SyntaxError in Users#index

Showing PROJECT_ROOT/app/views/layouts/application.html.erb where line #5 raised:

File to import not found or unreadable: compass/typography/vertical_rhythm.
Load path: Sass::Rails::Importer(PROJECT_ROOT/app/assets/stylesheets/gumby/_base.scss)
  (in PROJECT_ROOTr/app/assets/stylesheets/gumby/_base.scss)

After hours of tinkering, I am at a loss as to the reason why Sass cannot read the Compass library.

Answer 1

Ok, after much digging, I've found a way to incorporate Gumby into Rails, however I've lost the ability to edit the scss in the process. I did this using the gumby-framework gem. Setup was simple, following the README.

Answer 2

I believe I found the solution from https://stackoverflow.com/a/9021785/1280997.

Removing config/compass.rb and rebooting the server fixes the immediate problem, however I am now faced with:

Undefined mixin 'box-sizing'.
  (in PROJECT_ROOT/app/assets/stylesheets/gumby/_base.scss)