// Open is a high-level wrapper that takes a variadic number of URLs, opens or // creates each of the specified resources, and combines them into a locked // WriteSyncer. It also returns any error encountered and a function to close // any opened files. // // Passing no URLs returns a no-op WriteSyncer. Zap handles URLs without a // scheme and URLs with the "file" scheme. Third-party code may register // factories for other schemes using RegisterSink. // // URLs with the "file" scheme must use absolute paths on the local // filesystem. No user, password, port, fragments, or query parameters are // allowed, and the hostname must be empty or "localhost". // // Since it's common to write logs to the local filesystem, URLs without a // scheme (e.g., "/var/log/foo.log") are treated as local file paths. Without // a scheme, the special paths "stdout" and "stderr" are interpreted as // os.Stdout and os.Stderr. When specified without a scheme, relative file // paths also work. func Open(paths ...string) (zapcore.WriteSyncer, func(), error) { … } func open(paths []string) ([]zapcore.WriteSyncer, func(), error) { … } // CombineWriteSyncers is a utility that combines multiple WriteSyncers into a // single, locked WriteSyncer. If no inputs are supplied, it returns a no-op // WriteSyncer. // // It's provided purely as a convenience; the result is no different from // using zapcore.NewMultiWriteSyncer and zapcore.Lock individually. func CombineWriteSyncers(writers ...zapcore.WriteSyncer) zapcore.WriteSyncer { … }