LiteLog

Litelog is simple tiny package that provide logging with levels

There are five levels

// LOG levels
const (
	Info = iota
	Warn
	Err
	Debug
	Trace
)

If defined level is less than level that called method is expecting, than message will not be logged. It provide you ability to increase verbosity of logs.

Example

log := litelog.New(
    litelog.WithWriter(os.Stderr) // default os.Stdout
    litelog.WithLevel(litelog.Warn) // default Info
)

log.Error("some error message") // will not be logged
log.Debug("some debug message") // will not be logged

log.Info("some info message") // will be logged ("[INFO] some info message")
log.Warn("some warn message") // will be logged ("[WARN] some info message")

Logger parameters

Package provide ability to add:

1. Time prefix with litelog.WithTime(layout ...string) method. Layout is a some time package layout const layout parameter can be empty, than litelog.WithTime() method will set time.RFC3339 layout
2. Custom text prefix before message with litelog.WithPrefix(pr string) method.
3. Custom io.Writer object where Logger will be write mesages with litelog.WithWriter(wr io.Writer) method (By default os.Stdout).
4. Log level with litelog.WithLevel(lev int) method.

Level dependent methods

• Info(msg string) prints message if current level is more or equal Info with "[INFO]" prefix
• Infof(msg string, args ...interface{}) prints formatted message if current level is more or equal Info with "[INFO]" prefix
• Warn(msg string) prints message if current level is more or equal Warn with "[WARN]" prefix
• Warnf(msg string, args ...interface{}) prints formatted message if current level is more or equal Warn with "[WARN]" prefix
• Error(msg string) prints message if current level is more or equal Err with "[ERROR]" prefix
• Errorf(msg string, args ...interface{}) prints formatted message if current level is more or equal Err with "[ERROR]" prefix
• Debug(msg string) prints message if current level is more or equal Debug with "[DEBUG]" prefix
• Debugf(msg string, args ...interface{}) prints formatted message if current level is more or equal Debug with "[DEBUG]" prefix
• Trace(msg string) prints message if current level is more or equal Trace with "[TRACE]" prefix
• Tracef(msg string, args ...interface{}) prints formatted message if current level is equal Trace with "[TRACE]" prefix

Level independent methods

• Println(msg string) prints message in provided io.Writer
• Printf(msg string, args ...interface{}) prints formatted message in provided io.Writer
• Fatal(msg string) prints message and exit with status code 1
• Fatalf(msg string, args ...interface{}) prints formatted message and exit with status code 1