Make short work of your logs!
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package beaver
import (
"fmt"
"io"
"os"
"runtime"
"time"
"go.jolheiser.com/beaver/color"
)
// Logger is a base Beaver logger
type Logger struct {
Writer io.Writer
Level Level
Format FormatOptions
skip int
}
// FormatOptions defines formatting options for a logger
type FormatOptions struct {
TimePrefix bool
StackPrefix bool
StackLimit int
LevelPrefix bool
LevelColor bool
MessageColor bool
}
// New returns a new Beaver logger
func New(writer io.Writer, level Level, opts FormatOptions) *Logger {
return &Logger{
Writer: writer,
Level: level,
Format: opts,
skip: 3,
}
}
func (l *Logger) write(level Level, text string) {
if l.Level <= level {
var message string
if l.Format.TimePrefix {
message += color.Time.Format(time.Now().Format("01/02/2006 15:04:05")) + " "
}
if l.Format.StackPrefix {
_, file, line, _ := runtime.Caller(l.skip)
idx := len(file) - l.Format.StackLimit
if l.Format.StackLimit <= 0 {
idx = 0
}
if idx > 0 {
file = fmt.Sprintf("...%s", file[idx:])
}
message += color.Stack.Format(fmt.Sprintf("%s:%d", file, line)) + " "
}
if l.Format.LevelPrefix {
if l.Format.LevelColor {
message += level.Color().Format(level.Prefix())
} else {
message += level.Prefix()
}
message += " "
}
if l.Format.MessageColor {
message += level.Color().Format(text)
} else {
message += text
}
message += "\n"
_, _ = l.Writer.Write([]byte(message))
}
}
func (l *Logger) log(level Level, v ...interface{}) {
text := fmt.Sprint(v...)
l.write(level, text)
}
func (l *Logger) logf(level Level, format string, v ...interface{}) {
text := fmt.Sprintf(format, v...)
l.write(level, text)
}
// Low-Level Log
func (l *Logger) Log(level Level, v ...interface{}) {
l.log(level, v...)
}
// Low-Level formatted Log
func (l *Logger) Logf(level Level, format string, v ...interface{}) {
l.logf(level, format, v...)
}
// Trace logs at TRACE Level
func (l *Logger) Trace(v ...interface{}) {
l.log(TRACE, v...)
}
// Tracef formats logs at TRACE Level
func (l *Logger) Tracef(format string, v ...interface{}) {
l.logf(TRACE, format, v...)
}
// Debug logs at DEBUG Level
func (l *Logger) Debug(v ...interface{}) {
l.log(DEBUG, v...)
}
// Debugf formats logs at DEBUG Level
func (l *Logger) Debugf(format string, v ...interface{}) {
l.logf(DEBUG, format, v...)
}
// Info logs at INFO Level
func (l *Logger) Info(v ...interface{}) {
l.log(INFO, v...)
}
// Infof formats logs at INFO Level
func (l *Logger) Infof(format string, v ...interface{}) {
l.logf(INFO, format, v...)
}
// Warn logs at WARN Level
func (l *Logger) Warn(v ...interface{}) {
l.log(WARN, v...)
}
// Warnf formats logs at WARN Level
func (l *Logger) Warnf(format string, v ...interface{}) {
l.logf(WARN, format, v...)
}
// Error logs at ERROR Level
func (l *Logger) Error(v ...interface{}) {
l.log(ERROR, v...)
}
// Errorf formats logs at ERROR Level
func (l *Logger) Errorf(format string, v ...interface{}) {
l.logf(ERROR, format, v...)
}
// Fatal logs at FATAL Level
func (l *Logger) Fatal(v ...interface{}) {
l.log(FATAL, v...)
os.Exit(1)
}
// Fatalf formats logs at FATAL Level
func (l *Logger) Fatalf(format string, v ...interface{}) {
l.logf(FATAL, format, v...)
os.Exit(1)
}