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chromium / external / github.com / op / go-logging / 39b5b750090d2a17b611014eb2b85032af4ed1d1
commit39b5b750090d2a17b611014eb2b85032af4ed1d1[log] [tgz]
authorÖrjan Persson <o@42mm.org>Sat Jun 28 14:25:16 2014
committerÖrjan Persson <o@42mm.org>Sat Jun 28 14:31:54 2014
tree0944691c716870c5138122d3dd753cb90382aea6
parent883aa046296840e81fc8ef21fb62f34094f03e83 [diff]
Updated contributors file
1 file changed
tree: 0944691c716870c5138122d3dd753cb90382aea6
  1. .travis.yml
  2. backend.go
  3. CONTRIBUTORS
  4. format.go
  5. format_test.go
  6. level.go
  7. level_test.go
  8. LICENSE
  9. log.go
  10. log_test.go
  11. logger.go
  12. logger_test.go
  13. memory.go
  14. memory_test.go
  15. multi.go
  16. multi_test.go
  17. README.md
  18. syslog.go
README.md

Golang logging library

Build Status

Package logging implements a logging infrastructure for Go. It supports different logging backends like syslog, file and memory. Multiple backends can be utilized with different log levels per backend and logger.

Installing

Using go get

$ go get github.com/op/go-logging

After this command go-logging is ready to use. Its source will be in:

$GOROOT/src/pkg/github.com/op/go-logging

You can use go get -u -a to update all installed packages.

Example

You can find a more detailed example at the end.

package main

import "github.com/op/go-logging"

var log = logging.MustGetLogger("package.example")

func main() {
	var format = logging.MustStringFormatter("%{level} %{message}")
	logging.SetFormatter(format)
	logging.SetLevel(logging.INFO, "package.example")

	log.Debug("hello %s", "golang")
	log.Info("hello %s", "golang")
}

Documentation

For docs, see http://godoc.org/github.com/op/go-logging or run:

$ go doc github.com/op/go-logging

Full example

package main

import (
	stdlog "log"
	"os"

	"github.com/op/go-logging"
)

var log = logging.MustGetLogger("test")

type Password string

func (p Password) Redacted() interface{} {
	return logging.Redact(string(p))
}

func main() {
	// Customize the output format
	logging.SetFormatter(logging.MustStringFormatter("▶ %{level:.1s} 0x%{id:x} %{message}"))

	// Setup one stdout and one syslog backend.
	logBackend := logging.NewLogBackend(os.Stderr, "", stdlog.LstdFlags|stdlog.Lshortfile)
	logBackend.Color = true

	syslogBackend, err := logging.NewSyslogBackend("")
	if err != nil {
		log.Fatal(err)
	}

	// Combine them both into one logging backend.
	logging.SetBackend(logBackend, syslogBackend)

	// Run one with debug setup for "test" and one with error.
	for _, level := range []logging.Level{logging.DEBUG, logging.ERROR} {
		logging.SetLevel(level, "test")

		log.Critical("crit")
		log.Error("err")
		log.Warning("warning")
		log.Notice("notice")
		log.Info("info")
		log.Debug("debug %s", Password("secret"))
	}
}