ICommand now has an exec function.

Author: Cully Larson

src/Cully/ICommand.php

@@ -3,6 +3,13 @@
 namespace Cully;
 
 interface ICommand {
+    /**
+     * @param string $command
+     * @param string|null $cwd  The working directory in which to execute the command
+     * @param array $env Any environment variables to set
+     * @return void
+     */
+    public function exec($command, $cwd=null, array $env=[]);
     /**
      * @return bool
      */