Function migrate_config

pre_commit/commands/migrate_config.py:114–135

(config_file: str, quiet: bool = False)

def migrate_config(config_file: str, quiet: bool = False) -> int:
    with open(config_file) as f:
        orig_contents = contents = f.read()

    with cfgv.reraise_as(InvalidConfigError):
        with cfgv.validate_context(f'File {config_file}'):
            try:
                yaml_load(orig_contents)
            except Exception as e:
                raise cfgv.ValidationError(str(e))

    contents = _migrate_map(contents)
    contents = _migrate_composed(contents)

    if contents != orig_contents:
        with open(config_file, 'w') as f:
            f.write(contents)

        print('Configuration has been migrated.')
    elif not quiet:
        print('Configuration is already migrated.')
    return 0