Merge pull request rails#23917 from chashmeetsingh/patch-1

Create tmp folder if not present

Author: rafaelfranca

railties/lib/rails/tasks/dev.rake

@@ -1,14 +1,16 @@
 namespace :dev do
   desc 'Toggle development mode caching on/off'
   task :cache do
+    FileUtils.mkdir_p('tmp')
+  
     if File.exist? 'tmp/caching-dev.txt'
       File.delete 'tmp/caching-dev.txt'
       puts 'Development mode is no longer being cached.'
     else
       FileUtils.touch 'tmp/caching-dev.txt'
       puts 'Development mode is now being cached.'
     end
-
+    
     FileUtils.touch 'tmp/restart.txt'
   end
 end