Google apps script to copy folders in Google Drive

copy_google_drive_folders.js

function getDriveFolderFromPath (path) {
  return (path || "/").split("/").reduce ( function(prev,current) {
    if (prev && current) {
      var fldrs = prev.getFoldersByName(current);
      return fldrs.hasNext() ? fldrs.next() : null;
    }
    else {
      return current ? null : prev;
    }
  },DriveApp.getRootFolder());
}

function getSharedFolder(name){
  EMAIL = 'myemail@gmail.com'
  var folders = DriveApp.searchFolders('sharedWithMe');
  while (folders.hasNext()) {
    var folder = folders.next();
    if (folder.getName() == name && folder.getOwner().getEmail() == EMAIL){
      console.log(folder.getName(), folder.getId());
    }
  }
  return folder
}

function copyFolder(source, target) {

  console.log('Running:', source.getName())

  var folders = source.getFolders();
  var files = source.getFiles();

  while (files.hasNext()) {
    var file = files.next();
    file.makeCopy(file.getName(), target);
  }

  while (folders.hasNext()) {
    var subFolder = folders.next();
    var folderName = subFolder.getName();
    var targetFolder = target.createFolder(folderName);
    copyFolder(subFolder, targetFolder);
  }
}

function run() {
  SRC_PATH = "path/to/src"
  TARGET_PATH = "path/to/dst"
  
  // If source folder is a shared folder:
  // var source = getSharedFolder(SRC_PATH) 
  
  var source = getDriveFolderFromPath(SRC_PATH)
  var target = getDriveFolderFromPath(TARGET_PATH)

  console.log(source.getName(), target.getName())
  copyFolder(source, target);
}