ActiveStorage::Previewer::MuPDFPreviewer < ActiveStorage::Previewer

# File activestorage/lib/active_storage/previewer/mupdf_previewer.rb, line 6
      def accept?(blob)
        pdf?(blob.content_type) && mutool_exists?
      end

# File activestorage/lib/active_storage/previewer/mupdf_previewer.rb, line 18
      def mutool_exists?
        return @mutool_exists unless @mutool_exists.nil?

        system mutool_path, out: File::NULL, err: File::NULL

        @mutool_exists = $?.exitstatus == 1
      end

# File activestorage/lib/active_storage/previewer/mupdf_previewer.rb, line 14
      def mutool_path
        ActiveStorage.paths[:mutool] || "mutool"
      end

# File activestorage/lib/active_storage/previewer/mupdf_previewer.rb, line 10
      def pdf?(content_type)
        Marcel::Magic.child? content_type, "application/pdf"
      end

# File activestorage/lib/active_storage/previewer/mupdf_previewer.rb, line 27
    def preview(**options)
      download_blob_to_tempfile do |input|
        draw_first_page_from input do |output|
          yield io: output, filename: "#{blob.filename.base}.png", content_type: "image/png", **options
        end
      end
    end