1 files changed, 38 insertions, 0 deletions
diff --git a/lib/gitlab/dependency_linker/go_sum_linker.rb b/lib/gitlab/dependency_linker/go_sum_linker.rb
new file mode 100644
index 00000000000..20dc82ede9f
--- /dev/null
+++ b/lib/gitlab/dependency_linker/go_sum_linker.rb
@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module DependencyLinker
+    class GoSumLinker < GoModLinker
+      self.file_type = :go_sum
+
+      private
+
+      BASE64 = Gitlab::Regex.base64_regex
+      REGEX = Regexp.new("^\\s*(?<name>#{NAME.source})\\s+(?<version>v#{SEMVER.source})(\/go.mod)?\\s+h1:(?<checksum>#{BASE64.source})\\s*$", NAME.options).freeze
+
+      # rubocop: disable CodeReuse/ActiveRecord
+      def link_dependencies
+        highlighted_lines.map!.with_index do |rich_line, i|
+          plain_line = plain_lines[i].chomp
+          match = REGEX.match(plain_line)
+          next rich_line unless match
+
+          i0, j0 = match.offset(:name)
+          i2, j2 = match.offset(:checksum)
+
+          marker = StringRangeMarker.new(plain_line, rich_line.html_safe)
+          marker.mark([i0..(j0 - 1), i2..(j2 - 1)]) do |text, left:, right:|
+            if left
+              url = package_url(text, match[:version])
+              url ? link_tag(text, url) : text
+
+            elsif right
+              link_tag(text, "https://sum.golang.org/lookup/#{match[:name]}@#{match[:version]}")
+            end
+          end
+        end
+      end
+      # rubocop: enable CodeReuse/ActiveRecord
+    end
+  end
+end