logutil

Documentation

Overview

Example (Logall)

package main

import (
	"berty.tech/berty/v2/go/internal/logutil"
)

func main() {
	logger, cleanup, err := logutil.NewLogger(logutil.NewStdStream("*", "light-console", "stdout"))
	if err != nil {
		panic(err)
	}
	defer cleanup()

	logger.Debug("top debug")
	logger.Info("top info")
	logger.Warn("top warn")
	logger.Error("top error")

	logger.Named("foo").Debug("foo debug")
	logger.Named("foo").Info("foo info")
	logger.Named("foo").Warn("foo warn")
	logger.Named("foo").Error("foo error")

}

Output:

DEBUG	bty               	logutil/example_test.go:14	top debug
INFO 	bty               	logutil/example_test.go:15	top info
WARN 	bty               	logutil/example_test.go:16	top warn
ERROR	bty               	logutil/example_test.go:17	top error
DEBUG	bty.foo           	logutil/example_test.go:19	foo debug
INFO 	bty.foo           	logutil/example_test.go:20	foo info
WARN 	bty.foo           	logutil/example_test.go:21	foo warn
ERROR	bty.foo           	logutil/example_test.go:22	foo error

Example (Logerrors)

package main

import (
	"berty.tech/berty/v2/go/internal/logutil"
)

func main() {
	logger, cleanup, err := logutil.NewLogger(logutil.NewStdStream("error:*,-*.bar warn:*.bar", "light-console", "stdout"))
	if err != nil {
		panic(err)
	}
	defer cleanup()

	logger.Debug("top debug")
	logger.Info("top info")
	logger.Warn("top warn")
	logger.Error("top error")

	logger.Named("foo").Debug("foo debug")
	logger.Named("foo").Info("foo info")
	logger.Named("foo").Warn("foo warn")
	logger.Named("foo").Error("foo error")

	logger.Named("foo").Named("bar").Debug("foo.bar debug")
	logger.Named("foo").Named("bar").Info("foo.bar info")
	logger.Named("foo").Named("bar").Warn("foo.bar warn")
	logger.Named("foo").Named("bar").Error("foo.bar error")

}

Output:

ERROR	bty               	logutil/example_test.go:45	top error
ERROR	bty.foo           	logutil/example_test.go:50	foo error
WARN 	bty.foo.bar       	logutil/example_test.go:54	foo.bar warn

Index

• Constants
• func LogfileGC(logDir string, max int) error
• func NewLogger(streams ...Stream) (*zap.Logger, func(), error)
• type Logfile
  • func LogfileList(logDir string) ([]*Logfile, error)
  • func (l Logfile) Path() string
• type Stream
  • func NewCustomStream(filters string, logger *zap.Logger) Stream
  • func NewFileStream(filters, format, path, sessionKind string) Stream
  • func NewRingStream(filters, format string, ring *zapring.Core) Stream
  • func NewStdStream(filters, format, path string) Stream

Examples

• Package (Logall)
• Package (Logerrors)

Constants

const (
	Black uint8 = iota + 30
	Red
	Green
	Yellow
	Blue
	Magenta
	Cyan
	White
)

Functions

func LogfileGC

func LogfileGC(logDir string, max int) error

func NewLogger

func NewLogger(streams ...Stream) (*zap.Logger, func(), error)

Types

type Logfile

type Logfile struct {
	Dir    string
	Name   string
	Size   int64
	Kind   string
	Time   time.Time
	Latest bool
	Errs   error `json:"Errs,omitempty"`
}

func LogfileList

func LogfileList(logDir string) ([]*Logfile, error)

func (Logfile) Path

func (l Logfile) Path() string

type Stream

type Stream struct {
	// contains filtered or unexported fields
}

func NewCustomStream

func NewCustomStream(filters string, logger *zap.Logger) Stream

func NewFileStream

func NewFileStream(filters, format, path, sessionKind string) Stream

NewFileStream creates a new file stream backed by Lumberjack with sane default values.

Usually, Lumberjack is used as a rolling log file and is intended to be reused from a session to another, In Berty, we want one file per session named with the start time instead of the rotation time.

If the provided path is a directory, it will create files in that directory with the following pattern: `<path>/<session-kind>-<start-time>.log`.

If the provided path is a path finishing with ".log", then, the path will be taken as it, instead of creating a new file, it will append new lines to the existing one; this can be particularly useful to keep a `tail -f` running.

func NewRingStream

func NewRingStream(filters, format string, ring *zapring.Core) Stream

func NewStdStream

func NewStdStream(filters, format, path string) Stream