lib/capistrano/tasks/migrations.rake in capistrano-rails-1.1.1 vs lib/capistrano/tasks/migrations.rake in capistrano-rails-1.1.2

@@ -3,21 +3,29 @@
 namespace :deploy do
 
   desc 'Runs rake db:migrate if migrations are set'
   task :migrate => [:set_rails_env] do
     on primary fetch(:migration_role) do
-      within release_path do
-        with rails_env: fetch(:rails_env) do
-          execute :rake, "db:migrate"
+      conditionally_migrate = fetch(:conditionally_migrate)
+      info '[deploy:migrate] Checking changes in /db/migrate' if conditionally_migrate
+      if conditionally_migrate && test("diff -q #{release_path}/db/migrate #{current_path}/db/migrate")
+        info '[deploy:migrate] Skip `deploy:migrate` (nothing changed in db/migrate)'
+      else
+        info '[deploy:migrate] Run `rake db:migrate`' if conditionally_migrate
+        within release_path do
+          with rails_env: fetch(:rails_env) do
+            execute :rake, "db:migrate"
+          end
         end
       end
     end
   end
 
   after 'deploy:updated', 'deploy:migrate'
 end
 
 namespace :load do
   task :defaults do
+    set :conditionally_migrate, fetch(:conditionally_migrate, false)
     set :migration_role, fetch(:migration_role, :db)
   end
 end