Add cd (change directory) and within (run commands within a directory…

… and revert to the previous working_path).

src/functions.php

@@ -140,6 +140,40 @@ function after($it, $that)
     $afterScenario->addAfter($scenario);
 }
 
+/**
+ * Change the current working directory.
+ *
+ * @param string $path
+ */
+function cd($path)
+{
+    env('working_path', $path);
+}
+
+/**
+ * Execute a callback within a specific directory and revert back to the initial working directory.
+ *
+ * @param string $path
+ * @param callable $callback
+ */
+function within($path, $callback)
+{
+    $lastWorkingPath = workingPath();
+    env()->set('working_path', $path);
+    $callback();
+    env()->set('working_path', $lastWorkingPath);
+}
+
+/**
+ * Return the current working path.
+ *
+ * @return string
+ */
+function workingPath()
+{
+    return env()->get('working_path', env()->get(Environment::DEPLOY_PATH));
+}
+
 /**
  * Run command on server.
  *
@@ -149,7 +183,10 @@ function after($it, $that)
 function run($command)
 {
     $server = Context::get()->getServer();
-    $command = Context::get()->getEnvironment()->parse($command);
+    $command = env()->parse($command);
+    $workingPath = workingPath();
+
+    $command = "cd $workingPath && $command";
 
     if (isVeryVerbose()) {
         writeln("<comment>Run</comment>: $command");