Class: Sprockets::SassProcessor

Inherits:
Object
  • Object
show all
Defined in:
lib/sprockets/sass_processor.rb,
lib/sprockets/sass_cache_store.rb

Overview

Processor engine class for the SASS/SCSS compiler. Depends on the ‘sass` gem.

For more infomation see:

https://github.com/sass/sass
https://github.com/rails/sass-rails

Direct Known Subclasses

ScssProcessor

Defined Under Namespace

Modules: Functions Classes: CacheStore

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}, &block) ⇒ SassProcessor

Public: Initialize template with custom options.

options - Hash cache_version - String custom cache version. Used to force a cache

change after code changes are made to Sass Functions.



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# File 'lib/sprockets/sass_processor.rb', line 45

def initialize(options = {}, &block)
  @cache_version = options[:cache_version]
  @cache_key = "#{self.class.name}:#{VERSION}:#{Autoload::Sass::VERSION}:#{@cache_version}".freeze

  @functions = Module.new do
    include Functions
    include options[:functions] if options[:functions]
    class_eval(&block) if block_given?
  end
end

Instance Attribute Details

#cache_key ⇒ Object (readonly)

Returns the value of attribute cache_key.



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# File 'lib/sprockets/sass_processor.rb', line 37

def cache_key
  @cache_key
end

Class Method Details

.cache_key ⇒ Object 



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# File 'lib/sprockets/sass_processor.rb', line 33

def self.cache_key
  instance.cache_key
end

.call(input) ⇒ Object 



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# File 'lib/sprockets/sass_processor.rb', line 29

def self.call(input)
  instance.call(input)
end

.instance ⇒ Object

Public: Return singleton instance with default options.

Returns SassProcessor object.



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# File 'lib/sprockets/sass_processor.rb', line 25

def self.instance
  @instance ||= new
end

.syntax ⇒ Object

Internal: Defines default sass syntax to use. Exposed so the ScssProcessor may override it.



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# File 'lib/sprockets/sass_processor.rb', line 18

def self.syntax
  :sass
end

Instance Method Details

#call(input) ⇒ Object 



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# File 'lib/sprockets/sass_processor.rb', line 56

def call(input)
  context = input[:environment].context_class.new(input)

  options = {
    filename: input[:filename],
    syntax: self.class.syntax,
    cache_store: build_cache_store(input, @cache_version),
    load_paths: input[:environment].paths,
    sprockets: {
      context: context,
      environment: input[:environment],
      dependencies: context.metadata[:dependencies]
    }
  }

  engine = Autoload::Sass::Engine.new(input[:data], options)

  css = Utils.module_include(Autoload::Sass::Script::Functions, @functions) do
    engine.render
  end

  # Track all imported files
  sass_dependencies = Set.new([input[:filename]])
  engine.dependencies.map do |dependency|
    sass_dependencies << dependency.options[:filename]
    context.metadata[:dependencies] << URIUtils.build_file_digest_uri(dependency.options[:filename])
  end

  context.metadata.merge(data: css, sass_dependencies: sass_dependencies)
end