def main(schema=None, output_dir=None, config_path=None):
"""
Validate the schema file and output directory parameters.
Build a tree from the schema file.
Walk the tree, calling the registered callbacks on each node.
"""
validator = Validator(schema, output_dir=output_dir)
if not validator.validate():
click.echo(validator.error['msg'])
sys.exit(1)
directory_tree = Tree(
indent_size = validator.indent_size,
output_dir = output_dir,
base_path = os.path.abspath(os.curdir)
)
directory_tree.load_data(schema)
directory_tree.build_tree()
callbacks = [ pprint_node ]
if config_path:
process_hooks = make_config_processor(config_path)
callbacks.append(process_hooks)
directory_tree.walk(callbacks=callbacks)
