sass -> sassc

Fixes #1156

Gemfile

@@ -6,5 +6,5 @@ gemspec
 gem 'compass', require: false
 
 group :development do
-  gem 'byebug', platforms: [:mri_21, :mri_22], require: false
+  gem 'byebug', platform: :mri, require: false
 end

Rakefile

@@ -1,4 +1,4 @@
-lib_path = File.join(File.dirname(__FILE__), 'lib')
+lib_path = File.join(__dir__, 'lib')
 $:.unshift(lib_path) unless $:.include?(lib_path)
 
 load './tasks/bower.rake'
@@ -42,11 +42,12 @@ end
 
 desc 'Dumps output to a CSS file for testing'
 task :debug do
-  require 'sass'
+  require 'sassc'
+  require 'bootstrap-sass'
   path = Bootstrap.stylesheets_path
-  %w(bootstrap).each do |file|
-    engine = Sass::Engine.for_file("#{path}/#{file}.scss", syntax: :scss, load_paths: [path])
-    File.open("./#{file}.css", 'w') { |f| f.write(engine.render) }
+  %w(_bootstrap).each do |file|
+    engine = SassC::Engine.new(File.read("#{path}/#{file}.scss"), syntax: :scss, load_paths: [path])
+    File.open("tmp/#{file}.css", 'w') { |f| f.write(engine.render) }
   end
 end
 
@@ -64,7 +65,8 @@ end
 
 desc 'Compile bootstrap-sass to tmp/ (or first arg)'
 task :compile, :css_path do |t, args|
-  require 'sass'
+  require 'sassc'
+  require 'bootstrap-sass'
   require 'term/ansicolor'
 
   path = 'assets/stylesheets'
@@ -74,8 +76,8 @@ task :compile, :css_path do |t, args|
   %w(_bootstrap bootstrap/_theme).each do |file|
     save_path = "#{css_path}/#{file.sub(/(^|\/)?_+/, '\1').sub('/', '-')}.css"
     puts Term::ANSIColor.cyan("  #{save_path}") + '...'
-    engine    = Sass::Engine.for_file("#{path}/#{file}.scss", syntax: :scss, load_paths: [path])
-    css       = engine.render
+    engine = SassC::Engine.new(File.read("#{path}/#{file}.scss"), syntax: :scss, load_paths: [path])
+    css = engine.render
     File.open(save_path, 'w') { |f| f.write css }
   end
 end

assets/stylesheets/bootstrap/_theme.scss

@@ -8,8 +8,8 @@
 // Load core variables and mixins
 // --------------------------------------------------
 
-@import "variables";
-@import "mixins";
+@import "bootstrap/variables";
+@import "bootstrap/mixins";
 
 
 //

bootstrap-sass.gemspec

@@ -11,14 +11,14 @@ Gem::Specification.new do |s|
   s.homepage = 'https://github.com/twbs/bootstrap-sass'
   s.license  = 'MIT'
 
-  s.add_runtime_dependency 'sass', '>= 3.3.4'
+  s.add_runtime_dependency 'sassc', '>= 1.12.1'
   s.add_runtime_dependency 'autoprefixer-rails', '>= 5.2.1'
 
   # Testing dependencies
-  s.add_development_dependency 'minitest', '~> 5.8'
-  s.add_development_dependency 'minitest-reporters', '~> 1.1'
+  s.add_development_dependency 'minitest', '~> 5.11'
+  s.add_development_dependency 'minitest-reporters', '~> 1.3'
   # Integration testing
-  s.add_development_dependency 'capybara', '>= 2.5.0'
+  s.add_development_dependency 'capybara', '~> 3.6'
   s.add_development_dependency 'poltergeist'
   # Dummy Rails app dependencies
   s.add_development_dependency 'actionpack', '>= 4.1.5'

lib/bootstrap-sass.rb

@@ -11,9 +11,12 @@ def load!
         register_lotus
       elsif sprockets?
         register_sprockets
+      elsif defined?(::Sass) && ::Sass.respond_to?(:load_paths)
+        # The deprecated `sass` gem:
+        ::Sass.load_paths << stylesheets_path
+        # bootstrap requires minimum precision of 8, see https://github.com/twbs/bootstrap-sass/issues/409
+        ::Sass::Script::Number.precision = [8, ::Sass::Script::Number.precision].max
       end
-
-      configure_sass
     end
 
     # Paths
@@ -56,15 +59,6 @@ def lotus?
 
     private
 
-    def configure_sass
-      require 'sass'
-
-      ::Sass.load_paths << stylesheets_path
-
-      # bootstrap requires minimum precision of 8, see https://github.com/twbs/bootstrap-sass/issues/409
-      ::Sass::Script::Number.precision = [8, ::Sass::Script::Number.precision].max
-    end
-
     def register_compass_extension
       ::Compass::Frameworks.register(
           'bootstrap',

tasks/converter/less_conversion.rb

@@ -124,6 +124,8 @@ def process_stylesheet_assets
             file = replace_all file, /(\s*)\.navbar-(right|left)\s*\{\s*@extend\s*\.pull-(right|left);\s*/, "\\1.navbar-\\2 {\\1  float: \\2 !important;\\1"
           when 'tables.less'
             file = replace_all file, /(@include\s*table-row-variant\()(\w+)/, "\\1'\\2'"
+          when 'theme.less'
+            file = replace_all file, /@import "/, '\0bootstrap/'
           when 'thumbnails.less', 'labels.less', 'badges.less', 'buttons.less'
             file = extract_nested_rule file, 'a&'
           when 'glyphicons.less'

tasks/converter/network.rb

@@ -32,7 +32,7 @@ def read_cached_files(path, files)
       if File.directory?(full_path)
         files.each do |name|
           path = "#{full_path}/#{name}"
-          contents[name] = File.read(path, mode: 'rb') if File.exists?(path)
+          contents[name] = File.read(path, mode: 'rb') if File.exist?(path)
         end
       end
       contents
@@ -51,7 +51,7 @@ def get_file(url)
       uri = URI(url)
       cache_path = "./#@cache_path#{uri.path}#{uri.query.tr('?&=', '-') if uri.query}"
       FileUtils.mkdir_p File.dirname(cache_path)
-      if File.exists?(cache_path)
+      if File.exist?(cache_path)
         log_http_get_file url, true
         File.read(cache_path, mode: 'rb')
       else

test/compilation_test.rb

@@ -1,13 +1,13 @@
 require 'test_helper'
 require 'fileutils'
-require 'sass'
+require 'sassc'
 
 class CompilationTest < Minitest::Test
   def test_compilation
     path = 'assets/stylesheets'
     %w(_bootstrap bootstrap/_theme).each do |file|
       FileUtils.rm_rf('.sass-cache', secure: true)
-      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])
       FileUtils.mkdir_p("tmp/#{File.dirname(file)}")
       File.open("tmp/#{file}.css", 'w') { |f|
         f.write engine.render

test/dummy_rails/config/boot.rb

@@ -1,5 +1,5 @@
 # Set up gems listed in the Gemfile.
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../../../Gemfile', __FILE__)
 
-require 'bundler/setup' if File.exists?(ENV['BUNDLE_GEMFILE'])
+require 'bundler/setup' if File.exist?(ENV['BUNDLE_GEMFILE'])
 $LOAD_PATH.unshift File.expand_path('../../../../lib', __FILE__)

test/dummy_sass_only/Gemfile

@@ -1,4 +1,4 @@
 source 'https://rubygems.org'
 
-gem 'sass', '~> 3.3'
+gem 'sassc', '>= 1.12.1'
 gem 'bootstrap-sass', path: '../..'

test/dummy_sass_only/compile.rb

@@ -1,13 +1,20 @@
-require 'sass'
+# frozen_string_literal: true
+
+require 'sassc'
 require 'bootstrap-sass'
 require 'fileutils'
 
-scss_path = File.expand_path('./import_all.sass', File.dirname(__FILE__))
-css = Sass.compile File.read(scss_path), syntax: 'sass'
+load_path = ARGV[0]
+out_path = ARGV[1]
+
+output = SassC::Engine.new(
+  File.read(File.expand_path('./import_all.scss', __dir__)),
+  syntax: :scss, load_paths: [load_path]
+).render
 
-if ARGV[0]
-  FileUtils.mkdir_p File.dirname(ARGV[0])
-  File.open(ARGV[0], 'w') { |f| f.write css }
+if out_path
+  FileUtils.mkdir_p(File.dirname(out_path))
+  File.write(out_path, output)
 else
-  puts css
+  puts output
 end

test/dummy_sass_only/import_all.scss

@@ -0,0 +1,2 @@
+@import 'bootstrap';
+@import 'bootstrap/theme';

test/sass_test.rb

@@ -1,23 +1,25 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 require 'shellwords'
+require 'fileutils'
 
 class SassTest < Minitest::Test
   DUMMY_PATH = 'test/dummy_sass_only'
 
   def test_font_helper
-    assert_match %r(url\(['"]?.*eot['"]?\)), @css
+    assert_match %r{url\(['"]?.*eot['"]?\)}, @css
   end
 
   def setup
-    Dir.chdir DUMMY_PATH do
-      %x[rm -rf .sass-cache/]
-      %x[bundle]
-    end
+    FileUtils.rm_rf(File.join(DUMMY_PATH, '.sass-cache'), secure: true)
     css_path = File.join GEM_PATH, 'tmp/bootstrap-sass-only.css'
-    command  = "bundle exec ruby compile.rb #{Shellwords.escape css_path}"
     success  = Dir.chdir DUMMY_PATH do
       silence_stdout_if !ENV['VERBOSE'] do
-        system(command)
+        Bundler.with_original_env do
+          system('bundle') && system('bundle', 'exec', 'ruby', 'compile.rb',
+                                     Bootstrap.stylesheets_path, css_path)
+        end
       end
     end
     assert success, 'Sass-only compilation failed'

test/sprockets_rails_test.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 require 'fileutils'
 require 'find'
@@ -6,22 +8,24 @@
 class SprocketsRailsTest < Minitest::Test
 
   def test_sprockets_digest_asset_refs
-    root     = 'test/dummy_rails'
-    command  = "bundle exec rake assets:precompile GEMFILE=#{GEM_PATH}/Gemfile RAILS_ENV=production"
+    root = 'test/dummy_rails'
     compiled = Dir.chdir root do
       silence_stderr_if !ENV['VERBOSE'] do
-        system(command)
+        Bundler.with_original_env do
+          system({ 'BUNDLE_GEMFILE' => File.join(GEM_PATH, 'Gemfile'),
+                   'RAILS_ENV' => 'production' },
+                 'bundle exec rake assets:precompile')
+        end
       end
     end
     assert compiled, 'Could not precompile assets'
     Dir.glob(File.join(root, 'public', 'assets', 'app*.{css,js}')) do |path|
-      File.open(path, 'r') do |f|
-        f.read.scan /url\("?[^"]+\.(?:jpg|png|eot|woff2?|ttf|svg)[^"]*"?\)/ do |m|
-          assert_match /-[0-9a-f]{12,}\./, m
-        end
+      File.read(path)
+          .scan(/url\("?[^"]+\.(?:jpg|png|eot|woff2?|ttf|svg)[^"]*"?\)/) do |m|
+        assert_match(/-[0-9a-f]{12,}\./, m)
       end
     end
   ensure
-    FileUtils.rm_rf %W(#{root}/public/assets/ #{root}/tmp/cache/), secure: true
+    FileUtils.rm_rf %W[#{root}/public/assets/ #{root}/tmp/cache/], secure: true
   end
 end

test/test_helper.rb

@@ -10,7 +10,7 @@
   require_relative File.join('.', file)
 end
 
-GEM_PATH = File.expand_path('../', File.dirname(__FILE__))
+GEM_PATH = File.expand_path('../', __dir__)
 
 #= Capybara + Poltergeist
 require 'capybara/poltergeist'
@@ -26,6 +26,7 @@
 end
 
 Capybara.configure do |config|
+  config.server = :webrick
   config.app_host = 'http://localhost:7000'
   config.default_driver    = :poltergeist
   config.javascript_driver = :poltergeist