add schedule cache method

Author: taylorotwell

src/Illuminate/Foundation/Console/Kernel.php

@@ -99,14 +99,25 @@ public function __construct(Application $app, Dispatcher $events)
     protected function defineConsoleSchedule()
     {
         $this->app->singleton(Schedule::class, function ($app) {
-            return new Schedule($this->scheduleTimezone());
+            return (new Schedule($this->scheduleTimezone()))
+                    ->useCache($this->scheduleCache());
         });
 
         $schedule = $this->app->make(Schedule::class);
 
         $this->schedule($schedule);
     }
 
+    /**
+     * Get the name of the cache store that should manage scheduling mutexes.
+     *
+     * @return string
+     */
+    protected function scheduleCache()
+    {
+        return $_ENV['SCHEDULE_CACHE_DRIVER'] ?? null;
+    }
+
     /**
      * Run the console application.
      *