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// Package log implements a small wrapper around the std lib log package.
// It implements log levels by prefixing the logs with [INFO], [DEBUG],
// [WARNING] or [ERROR].
// Debug logging is available and enabled if the *debug* plugin is used.
//
// log.Info("this is some logging"), will log on the Info level.
//
// log.Debug("this is debug output"), will log in the Debug level.
package log
import (
"fmt"
golog "log"
)
// D controls whether we should output debug logs. If true, we do.
var D bool
// logf calls log.Printf prefixed with level.
func logf(level, format string, v ...interface{}) {
s := level + fmt.Sprintf(format, v...)
golog.Print(s)
}
// log calls log.Print prefixed with level.
func log(level string, v ...interface{}) { s := level + fmt.Sprint(v...); golog.Print(s) }
// Debug is equivalent to log.Print(), but prefixed with "[DEBUG] ". It only outputs something
// if D is true.
func Debug(v ...interface{}) {
if !D {
return
}
log(debug, v...)
}
// Debugf is equivalent to log.Printf(), but prefixed with "[DEBUG] ". It only outputs something
// if D is true.
func Debugf(format string, v ...interface{}) {
if !D {
return
}
logf(debug, format, v...)
}
// Info is equivalent to log.Print, but prefixed with "[INFO] ".
func Info(v ...interface{}) { log(info, v...) }
// Infof is equivalent to log.Printf, but prefixed with "[INFO] ".
func Infof(format string, v ...interface{}) { logf(info, format, v...) }
// Warning is equivalent to log.Print, but prefixed with "[WARNING] ".
func Warning(v ...interface{}) { log(warning, v...) }
// Warningf is equivalent to log.Printf, but prefixed with "[WARNING] ".
func Warningf(format string, v ...interface{}) { logf(warning, format, v...) }
// Error is equivalent to log.Print, but prefixed with "[ERROR] ".
func Error(v ...interface{}) { log(err, v...) }
// Errorf is equivalent to log.Printf, but prefixed with "[ERROR] ".
func Errorf(format string, v ...interface{}) { logf(err, format, v...) }
const (
debug = "[DEBUG] "
err = "[ERROR] "
warning = "[WARNING] "
info = "[INFO] "
)
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