gitlab-org--gitlab-foss/app/views/shared/_file_highlight.html.haml

#blob-content.file-content.code.js-syntax-highlight
  -  offset = defined?(first_line_number) ? first_line_number : 1
  .line-numbers
    - if blob.data.present?
      - link = blob_link if defined?(blob_link)
      - blob.data.each_line.each_with_index do |_, index|
        - i = index + offset
        -# We're not using `link_to` because it is too slow once we get to thousands of lines.
        %a.file-line-num.diff-line-num{ href: "#{link}#L#{i}", id: "L#{i}", 'data-line-number' => i }
          = i
  - highlight = defined?(highlight_line) && highlight_line ? highlight_line - offset : nil
  .blob-content{ data: { blob_id: blob.id, path: blob.path, highlight_line: highlight, qa_selector: 'file_content' } }
    %pre.code.highlight
      %code
        = blob.present.highlight