1 files changed, 18 insertions, 0 deletions
diff --git a/lib/gitlab/dependency_linker/base_linker.rb b/lib/gitlab/dependency_linker/base_linker.rb
index ac2efe598b4..ffad00fa7d7 100644
--- a/lib/gitlab/dependency_linker/base_linker.rb
+++ b/lib/gitlab/dependency_linker/base_linker.rb
@@ -4,6 +4,7 @@ module Gitlab
   module DependencyLinker
     class BaseLinker
       URL_REGEX = %r{https?://[^'" ]+}.freeze
+      GIT_INVALID_URL_REGEX = /^git\+#{URL_REGEX}/.freeze
       REPO_REGEX = %r{[^/'" ]+/[^/'" ]+}.freeze
 
       class_attribute :file_type
@@ -29,8 +30,25 @@ module Gitlab
         highlighted_lines.join.html_safe
       end
 
+      def external_url(name, external_ref)
+        return if external_ref =~ GIT_INVALID_URL_REGEX
+
+        case external_ref
+        when /\A#{URL_REGEX}\z/
+          external_ref
+        when /\A#{REPO_REGEX}\z/
+          github_url(external_ref)
+        else
+          package_url(name)
+        end
+      end
+
       private
 
+      def package_url(_name)
+        raise NotImplementedError
+      end
+
       def link_dependencies
         raise NotImplementedError
       end