Add the docker-composer ps command.

README.md

@@ -33,6 +33,7 @@ composer require --dev droath/robo-docker-compose
 The following commands have been implemented:
 
 - docker-compose up
+- docker-compose ps
 - docker-compose pull
 - docker-compose exec 
 - docker-compose down

src/Task/Ps.php

@@ -0,0 +1,59 @@
+<?php
+
+namespace Droath\RoboDockerCompose\Task;
+
+use Droath\RoboDockerCompose\DockerServicesTrait;
+
+/**
+ * Define the docker composer ps command.
+ */
+class Ps extends Base
+{
+    use DockerServicesTrait;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected $action = 'ps';
+
+    /**
+     * Only display IDs.
+     *
+     * @return $this
+     */
+    public function quiet()
+    {
+        $this->option('quiet');
+
+        return $this;
+    }
+
+    /**
+     * Display services.
+     *
+     * @return $this
+     */
+    public function services()
+    {
+        $this->option('services');
+
+        return $this;
+    }
+
+    /**
+     * Filter services by a property.
+     *
+     * @param string $key
+     *   The filter property key.
+     * @param string $value
+     *   The filter property value.
+     *
+     * @return $this
+     */
+    public function filter($key, $value)
+    {
+        $this->option('filter', "{$key}={$value}");
+
+        return $this;
+    }
+}

src/Task/loadTasks.php

@@ -15,6 +15,14 @@ trait loadTasks
         return $this->task(Up::class, $pathToDockerCompose);
     }
 
+    /**
+     * Docker compose ps task.
+     */
+    protected function taskDockerComposePs($pathToDockerCompose = null)
+    {
+        return $this->task(Ps::class, $pathToDockerCompose);
+    }
+
     /**
      * Docker compose down task.
      */