/
log.go
157 lines (131 loc) · 2.67 KB
/
log.go
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package log
import (
"fmt"
"io"
"os"
"time"
"github.com/mattn/go-colorable"
"github.com/mattn/go-isatty"
)
type color string
const (
colorTrace color = "\033[2m\033[37m"
colorInfo color = "\033[36m"
colorWarning color = "\033[33m"
colorError color = "\033[1m\033[31m"
colorFatal color = "\033[4m\033[1m\033[35m"
)
type Severity int
const (
NONE Severity = iota
FATAL
ERROR
WARNING
INFO
TRACE
)
var (
out = colorable.NewColorableStderr()
colorEnabled = true
minSeverity = INFO
)
func log(severity Severity, args ...interface{}) {
if severity <= minSeverity {
fmt.Fprint(out, logPrefix(severity), fmt.Sprintln(args...))
}
}
func logf(severity Severity, format string, args ...interface{}) {
if severity <= minSeverity {
fmt.Fprint(out, logPrefix(severity), fmt.Sprintf(format+"\n", args...))
}
}
func Trace(args ...interface{}) {
setColor(colorTrace)
log(TRACE, args...)
resetColor()
}
func Tracef(format string, args ...interface{}) {
setColor(colorTrace)
logf(TRACE, format, args...)
resetColor()
}
func Info(args ...interface{}) {
setColor(colorInfo)
log(INFO, args...)
resetColor()
}
func Infof(format string, args ...interface{}) {
setColor(colorInfo)
logf(INFO, format, args...)
resetColor()
}
func Warn(args ...interface{}) {
setColor(colorWarning)
log(WARNING, args...)
resetColor()
}
func Warnf(format string, args ...interface{}) {
setColor(colorWarning)
logf(WARNING, format, args...)
resetColor()
}
func Error(args ...interface{}) {
setColor(colorError)
log(ERROR, args...)
resetColor()
}
func Errorf(format string, args ...interface{}) {
setColor(colorError)
logf(ERROR, format, args...)
resetColor()
}
func Fatal(args ...interface{}) {
setColor(colorFatal)
log(FATAL, args...)
resetColor()
os.Exit(1)
}
func Fatalf(format string, args ...interface{}) {
setColor(colorFatal)
logf(FATAL, format, args...)
resetColor()
os.Exit(1)
}
func SetSeverity(severity Severity) {
minSeverity = severity
}
func SetOutput(file *os.File) {
if isatty.IsTerminal(file.Fd()) {
out = colorable.NewColorable(file)
} else {
out = colorable.NewNonColorable(file)
}
}
func Output() io.Writer {
return out
}
func logPrefix(severity Severity) string {
return fmt.Sprintf("%s %s", time.Now().UTC().Format("2006-01-02 15:04:05.000"), severityTag(severity))
}
func setColor(color color) {
fmt.Fprint(out, color)
}
func resetColor() {
fmt.Fprint(out, "\033[0m")
}
func severityTag(severity Severity) string {
switch severity {
case TRACE:
return "[TRACE]: "
case INFO:
return "[INFO] : "
case WARNING:
return "[WARN] : "
case ERROR:
return "[ERROR]: "
case FATAL:
return "[FATAL]: "
default:
return "[???] : "
}
}