/
logex.lvl.go
executable file
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/
logex.lvl.go
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// Copyright © 2020 Hedzr Yeh.
package cmdr
import (
"fmt"
"strings"
)
//
// The following codes copied and modified from hedzr/log
//
// Level type
type Level uint32
// Convert the Level to a string. E.g. PanicLevel becomes "panic".
func (level Level) String() string {
if b, err := level.MarshalText(); err == nil {
return string(b)
}
return "unknown"
}
// ParseLevel takes a string level and returns the hedzr/log logging level constant.
func ParseLevel(lvl string) (Level, error) {
switch strings.ToLower(lvl) {
case "panic":
return PanicLevel, nil
case "fatal":
return FatalLevel, nil
case "error":
return ErrorLevel, nil
case "warn", "warning":
return WarnLevel, nil
case "info":
return InfoLevel, nil
case "debug", "devel", "dev", "develop":
return DebugLevel, nil
case "trace":
return TraceLevel, nil
case "off", "no", "disable":
return OffLevel, nil
}
var l Level
return l, fmt.Errorf("not a valid logger Level: %q", lvl)
}
// UnmarshalText implements encoding.TextUnmarshaler.
func (level *Level) UnmarshalText(text []byte) error {
l, err := ParseLevel(string(text))
if err != nil {
return err
}
*level = l
return nil
}
// Available level names are:
// "disable"
// "fatal"
// "error"
// "warn"
// "info"
// "debug"
// MarshalText convert Level to string and []byte
func (level Level) MarshalText() ([]byte, error) {
switch level {
case OffLevel:
return []byte("off"), nil
case TraceLevel:
return []byte("trace"), nil
case DebugLevel:
return []byte("debug"), nil
case InfoLevel:
return []byte("info"), nil
case WarnLevel:
return []byte("warning"), nil
case ErrorLevel:
return []byte("error"), nil
case FatalLevel:
return []byte("fatal"), nil
case PanicLevel:
return []byte("panic"), nil
}
return nil, fmt.Errorf("not a valid logger level %d", level)
}
// AllLevels is a constant exposing all logging levels
var AllLevels = []Level{
PanicLevel,
FatalLevel,
ErrorLevel,
WarnLevel,
InfoLevel,
DebugLevel,
TraceLevel,
OffLevel,
}
// These are the different logging levels. You can set the logging level to log
// on your instance of logger, obtained with `log.NewDummyLogger()`/`log.NewStdLogger()`.
const (
// PanicLevel level, highest level of severity. Logs and then calls panic with the
// message passed to Debug, Info, ...
PanicLevel Level = iota
// FatalLevel level. Logs and then calls `logger.Exit(1)`. It will exit even if the
// logging level is set to Panic.
FatalLevel
// ErrorLevel level. Logs. Used for errors that should definitely be noted.
// Commonly used for hooks to send errors to an error tracking service.
ErrorLevel
// WarnLevel level. Non-critical entries that deserve eyes.
WarnLevel
// InfoLevel level. General operational entries about what's going on inside the
// application.
InfoLevel
// DebugLevel level. Usually only enabled when debugging. Very verbose logging.
DebugLevel
// TraceLevel level. Designates finer-grained informational events than the Debug.
TraceLevel
// OffLevel level. The logger will be shutdown.
OffLevel
)