Show git version on admin page

CHANGELOG

@@ -55,6 +55,8 @@ v 8.3.0 (unreleased)
   - Do not show build status unless builds are enabled and `.gitlab-ci.yml` is present
   - Persist runners registration token in database
   - Fix online editor should not remove newlines at the end of the file
+  - Expose Git's version in the admin area
+
 
 v 8.2.3
   - Fix application settings cache not expiring after changes (Stan Hu)

app/views/admin/dashboard/index.html.haml

@@ -79,6 +79,10 @@
         GitLab API
         %span.pull-right
           = API::API::version
+      %p
+        Git
+        %span.pull-right
+          = Gitlab::Git.version
       %p
         Ruby
         %span.pull-right

lib/gitlab/git.rb

@@ -20,6 +20,10 @@ module Gitlab
       def blank_ref?(ref)
         ref == BLANK_SHA
       end
+
+      def version
+        Gitlab::VersionInfo.parse(Gitlab::Popen.popen(%W(#{Gitlab.config.git.bin_path} --version)).first)
+      end
     end
   end
 end