Adds environment support to Exec task

src/Task/Base/Exec.php

@@ -36,6 +36,7 @@ class Exec extends BaseTask implements CommandInterface, PrintedInterface
     protected $background = false;
     protected $timeout = null;
     protected $idleTimeout = null;
+    protected $env = null;
 
     /**
      * @var Process
@@ -88,6 +89,18 @@ public function idleTimeout($timeout)
         return $this;
     }
 
+    /**
+     * Sets the environment variables for the command
+     *
+     * @param $env
+     * @return $this
+     */
+    public function env(array $env)
+    {
+        $this->env = $env;
+        return $this;
+    }
+
     public function __destruct()
     {
         $this->stop();
@@ -111,6 +124,10 @@ public function run()
         $this->process->setIdleTimeout($this->idleTimeout);
         $this->process->setWorkingDirectory($this->workingDirectory);
 
+        if (isset($this->env)) {
+            $this->process->setEnv($this->env);
+        }
+
         if (!$this->background and !$this->isPrinted) {
             $this->startTimer();
             $this->process->run();