Issue #3: Remove $drush variable; trying just 'drush' in sub commands.

.do/run-background-tasks.php

@@ -7,8 +7,6 @@
 
 require __DIR__ . '/../vendor/autoload.php';
 
-$drush = \realpath(__DIR__ . '/../vendor/bin/drush');
-
 /** @var \React\EventLoop\LoopInterface */
 $loop = Loop::get();
 
@@ -18,29 +16,29 @@
 });
 
 // Run cron every 15 minutes.
-$loop->addPeriodicTimer(900, function() use ($drush): void {
- (new WorkerProcess($drush . ' cron'))->start();
+$loop->addPeriodicTimer(900, function(): void {
+ (new WorkerProcess('drush cron'))->start();
 });
 
 // Every 5 minutes, process jobs from the image style warmer.
-$loop->addPeriodicTimer(300, function() use ($drush): void {
+$loop->addPeriodicTimer(300, function(): void {
  (new WorkerProcess(
- $drush . ' queue:process image_style_warmer_pregenerator'
+ 'drush queue:process image_style_warmer_pregenerator'
  ))->start();
 });
 
 // Every 10 minutes, enqueue and process the warmer queue.
-$loop->addPeriodicTimer(600, function() use ($drush, $loop): void {
+$loop->addPeriodicTimer(600, function() use ($loop): void {
 
- $loop->futureTick(function() use ($drush): void {
- (new WorkerProcess($drush . ' warmer:enqueue ' . \implode(',', [
+ $loop->futureTick(function(): void {
+ (new WorkerProcess('drush warmer:enqueue ' . \implode(',', [
  'omnipedia_wiki_node_changes',
  'omnipedia_wiki_node_cdn',
  ])))->start();
  });
 
- $loop->futureTick(function() use ($drush): void {
- (new WorkerProcess($drush . ' queue:process warmer'))->start();
+ $loop->futureTick(function(): void {
+ (new WorkerProcess('drush queue:process warmer'))->start();
  });
 
 });