Python script which deletes empty folders and meta files in Unity projects. Can be used as git hook.

RemoveEmptyFolders.py

#!/c/Python27/python
# Used as post-checkout and pre-commit git hook

import os
import sys
import msvcrt

deleted_files = []

def is_directory_empty(path):
    return os.listdir(path) == [] or (len(os.listdir(path)) == 1 and os.path.isfile(os.path.join(path, '.DS_Store')))

def cleanup_directory(path):
    global deleted_files
    print '    ' + path

    result = []
    all_files = os.listdir(path)

    for filename in all_files:
        full_file_path = os.path.join(path, filename)
        basename, extension = os.path.splitext(filename)

        if extension == '.meta':
            meta_subject = os.path.join(path, basename)

            if not os.path.exists(meta_subject):
                print 'did not find ' + meta_subject + ', deleting .meta file'
                deleted_files.append(full_file_path)
                os.remove(full_file_path)

            elif os.path.isdir(meta_subject):
                cleanup_directory(meta_subject)
                if is_directory_empty(meta_subject):
                    print meta_subject + ' is empty, deleting directory and .meta file'
                    
                    ds_file = os.path.join(meta_subject, '.DS_Store')
                    if os.path.isfile(ds_file):
                        os.remove(ds_file)
                        deleted_files.append(ds_file)
                    
                    os.rmdir(meta_subject)
                    os.remove(full_file_path)
                    deleted_files.append(meta_subject)
                    deleted_files.append(full_file_path)

if __name__ == '__main__':
    assets_path = 'Assets'
        
    deleted_files = []
    cleanup_directory(assets_path)

    if len(deleted_files) > 0:
        print 'Cleaning unused meta files from ' + assets_path
        print ''
        print '---------------------------------------------------------------'
        print ''
        print 'Deleted the following meta files and directories:'
        print ''
        for filename in deleted_files:
            print filename