tailscale/types/logger/logger.go
Brad Fitzpatrick 3988ddc85d types/logger: add WithPrefix, use it in two places
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-25 11:35:46 -08:00

19 lines
656 B
Go

// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package logger defines a type for writing to logs. It's just a
// convenience type so that we don't have to pass verbose func(...)
// types around.
package logger
// Logf is the basic Tailscale logger type: a printf-like func.
type Logf func(format string, args ...interface{})
// WithPrefix wraps f, prefixing each format with the provided prefix.
func WithPrefix(f Logf, prefix string) Logf {
return func(format string, args ...interface{}) {
f(prefix+format, args...)
}
}