sass -> sassc

Fixes #159

Author: glebm

Rakefile

@@ -45,13 +45,13 @@ end
 
 desc 'Dumps output to a CSS file for testing'
 task :debug do
-  require 'sass'
+  require 'sassc'
   require './lib/bootstrap'
   require 'term/ansicolor'
   require 'autoprefixer-rails'
   path = Bootstrap.stylesheets_path
   %w(_bootstrap _bootstrap-reboot _bootstrap-grid).each do |file|
-    engine = Sass::Engine.for_file("#{path}/#{file}.scss", syntax: :scss, load_paths: [path])
+    engine = SassC::Engine.new(File.read("#{path}/#{file}.scss"), syntax: :scss, load_paths: [path])
     out = File.join('tmp', "#{file[1..-1]}.css")
     css = engine.render
     css = AutoprefixerRails.process(css)

bootstrap.gemspec

@@ -11,10 +11,10 @@ Gem::Specification.new do |s|
   s.homepage = 'https://github.com/twbs/bootstrap-rubygem'
   s.license  = 'MIT'
 
-  s.add_runtime_dependency 'popper_js', '>= 1.12.9', '< 2'
+  s.add_runtime_dependency 'popper_js', '>= 1.14.3', '< 2'
 
-  s.add_runtime_dependency 'sass', '>= 3.5.2'
-  s.add_runtime_dependency 'autoprefixer-rails', '>= 6.0.3'
+  s.add_runtime_dependency 'sassc', '>= 1.12.1'
+  s.add_runtime_dependency 'autoprefixer-rails', '>= 9.1.0'
 
   # Testing dependencies
   s.add_development_dependency 'minitest', '~> 5.8.0'

lib/bootstrap.rb

@@ -11,9 +11,10 @@ def load!
         register_hanami
       elsif sprockets?
         register_sprockets
+      elsif defined?(::Sass) && ::Sass.respond_to?(:load_paths)
+        # The deprecated `sass` gem:
+        ::Sass.load_paths << stylesheets_path
       end
-
-      configure_sass
     end
 
     # Paths
@@ -48,12 +49,6 @@ def hanami?
 
     private
 
-    def configure_sass
-      require 'sass'
-
-      ::Sass.load_paths << stylesheets_path
-    end
-
     def register_rails_engine
       require 'bootstrap/engine'
     end