Handle /-/jira prefix when Jira links projects and commits

config/routes/project.rb

@@ -18,6 +18,7 @@ constraints(ProjectUrlConstrainer.new) do
   # `:project_id`, or `*id`.
   #
   # See https://github.com/rails/rails/blob/v4.2.8/actionpack/lib/action_dispatch/routing/mapper.rb#L155
+
   scope(path: '*namespace_id',
         as: :namespace,
         namespace_id: Gitlab::PathRegex.full_namespace_route_regex) do
@@ -476,4 +477,14 @@ constraints(ProjectUrlConstrainer.new) do
       end
     end
   end
+
+  scope path: '/-/jira', as: :jira do
+    scope path: '*namespace_id', namespace_id: Gitlab::PathRegex.full_namespace_route_regex do
+      resources :projects, path: '/', constraints: { id: Gitlab::PathRegex.project_route_regex }, only: :show
+
+      scope path: ':project_id', constraints: { project_id: Gitlab::PathRegex.project_route_regex }, module: :projects do
+        resources :commit, only: :show, constraints: { id: /\h{7,40}/ }
+      end
+    end
+  end
 end