Module: SassRailsSourceMaps::SassTemplate

Defined in:
lib/sass-rails-source-maps/sass_template.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/sass-rails-source-maps/sass_template.rb', line 50

def self.included(base)
  base.class_eval do
    alias_method_chain :evaluate, :source_maps
  end
end

Instance Method Details

#copy_dependencies(files) ⇒ Object 



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# File 'lib/sass-rails-source-maps/sass_template.rb', line 9

def copy_dependencies(files)
  files.each do |file|
    FileUtils.cp(file, Rails.root.join("public", SassRailsSourceMaps::SOURCE_MAPS_DIRECTORY, File.basename(file)))
  end
end

#evaluate_with_source_maps(context, locals, &block) ⇒ Object 



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# File 'lib/sass-rails-source-maps/sass_template.rb', line 15

def evaluate_with_source_maps(context, locals, &block)
  cache_store = Sprockets::SassCacheStore.new(context.environment)

  options = {
    sourcemap_filename:  ::Sass::Util::sourcemap_name(basename),
    filename:            eval_file,
    line:                line,
    syntax:              syntax,
    cache_store:         cache_store,
    cache:               ::Rails.application.config.assets.debug,
    line_numbers:        ::Rails.application.config.sass.line_numbers,
    line_comments:       ::Rails.application.config.sass.line_comments,
    importer:            SassImporter.new(context.pathname.to_s),
    load_paths:          context.environment.paths.map { |path| SassImporter.new(path.to_s) },
    sprockets:           {
      context:     context,
      environment: context.environment
    }
  }

  result, mapping = ::Sass::Engine.new(data, options).render_with_sourcemap("/#{SOURCE_MAPS_DIRECTORY}/#{options[:sourcemap_filename]}")

  write_output(data, ::Rails.root.join("public", SOURCE_MAPS_DIRECTORY, basename).to_s)
  write_output(mapping.to_json(
      css_path:       basename.gsub(".#{syntax.to_s}", ""),
      sourcemap_path: ::Rails.root.join("public", SOURCE_MAPS_DIRECTORY, options[:sourcemap_filename])) + "\n",
    ::Rails.root.join("public", SOURCE_MAPS_DIRECTORY, options[:sourcemap_filename]).to_s)
  copy_dependencies(context._dependency_paths)

  result
rescue ::Sass::SyntaxError => e
  context.__LINE__ = e.sass_backtrace.first[:line]
  raise e
end

#write_output(text, destination) ⇒ Object 



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# File 'lib/sass-rails-source-maps/sass_template.rb', line 4

def write_output(text, destination)
  FileUtils.mkdir_p(Rails.root.join("public", SassRailsSourceMaps::SOURCE_MAPS_DIRECTORY))
  File.open(destination, 'wb') { |file| file.write(text) }
end