Prune Empty Folders in Unity Projects

ProjectCleaner.cs

using UnityEngine;
using UnityEditor;
using System.IO;

[InitializeOnLoad]
public class ProjectCleaner
{
	static int FilesDeleted = 0;
	static int DirsDeleted = 0;

	static ProjectCleaner()
	{
		FindAndDeleteEmptyDirectories(Application.dataPath);

		if (DirsDeleted > 0 || FilesDeleted > 0)
		{
			Debug.Log("<i>Project Cleaner</i> script deleted: <b>" + DirsDeleted + "</b> empty folder(s) and <b>" + FilesDeleted + "</b> related meta files.");
		}

		AssetDatabase.Refresh();
	}

	static void FindAndDeleteEmptyDirectories(string dirPath)
	{
		string[] dirs = Directory.GetDirectories(dirPath);

		foreach (string dir in dirs)
		{
			// First clear out any potential directories found internally.
			FindAndDeleteEmptyDirectories(dir);

			// Then check if the folder is empty.
			if (Directory.GetFileSystemEntries(dir).Length == 0)
			{
				Debug.Log("Deleting empty directory: \"<color=red>" + dir + "</color>\"");

				string metaPath = dir + ".meta";

				// Check for a meta file sitting next to the directory.
				if (File.Exists(metaPath))
				{
					Debug.Log("Deleting empty directory meta file: \"<color=red>" + metaPath + "</color>\" ");

					// Delete the empty folder's meta file.
					File.Delete(metaPath);
					FilesDeleted++;
				}

				// Delete the empty folder itself.
				Directory.Delete(dir);
				DirsDeleted++;
			}
		}
	}
}