auto update __init__.py files for namespace packages installer

gistfile1.txt

ignore_keywords = ['build', 'egg-info', 'dist', 'frontend', 'scratch', 'doc']


def ignore_check(folder):
    for i in ignore_keywords:
        if folder.endswith(i) or i in folder.split('/'):
            return True
    return False


def check_init(
    filename, txt="__import__('pkg_resources').declare_namespace(__name__)"
):
    with open(filename, 'rb') as f:
        return any(txt in line for line in f)


def update_init(
    filename, txt="__import__('pkg_resources').declare_namespace(__name__)"
):
    with open(filename, 'a+') as f:
        f.write('\n{}\n'.format(txt))


def namespace_init(folder='.'):
    for foldername, subfolders, filenames in os.walk(folder):
        if not ignore_check(foldername):
            for subfolder in [x for x in subfolders]:
                namespace_init(subfolder)
            if '__init__.py' in filenames:
                if not check_init(os.path.join(foldername, '__init__.py')):
                    update_init(os.path.join(foldername, '__init__.py'))
            else:
                update_init(os.path.join(foldername, '__init__.py'))