bitegra/slides#1 Enhance volume.php to allow mounting of subdirectories

bin/volume.php

@@ -21,15 +21,16 @@ function readContainerConfig() {
 
 function getDockerMountSource($args) {
   $currentDir = getcwd();
+  $suffix = (empty($args[2])) ? '' : '/' . $args[2];
   $destDir = (empty($args[1])) ? $currentDir : $args[1];
 
   $container = readContainerConfig();
   foreach ($container['Mounts'] as $mount) {
     if (strpos($currentDir, $mount['Destination']) === 0) {
-      return $mount['Source'] . ':' . (empty($args[1]) ? $mount['Destination'] : $destDir);
+      return $mount['Source'] . $suffix . ':' . (empty($args[1]) ? $mount['Destination'] : $destDir) . $suffix;
     }
   }
-  return $currentDir . ':' . $destDir;
+  return $currentDir . $suffix . ':' . $destDir . $suffix;
 }
 
 print(getDockerMountSource($argv));