/
log.go
70 lines (59 loc) · 1.38 KB
/
log.go
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package log
import (
"fmt"
"os"
"github.com/fatih/color"
)
type Level uint8
const (
ErrorLevel Level = iota
WarnLevel
DebugLevel
)
var (
level = WarnLevel
out stringWriter = os.Stderr
)
// TODO: replace with io.StringWriter once support for go1.11 is dropped.
type stringWriter interface {
WriteString(s string) (n int, err error)
}
// SetLevel for the global logger.
func SetLevel(l Level) {
level = l
}
// Warnf prints the message to stderr, with a yellow WARN prefix.
func Warnf(format string, args ...interface{}) {
if level < WarnLevel {
return
}
out.WriteString(color.YellowString("WARN "))
out.WriteString(fmt.Sprintf(format, args...))
out.WriteString("\n")
}
// Debugf prints the message to stderr, with no prefix.
func Debugf(format string, args ...interface{}) {
if level < DebugLevel {
return
}
out.WriteString(fmt.Sprintf(format, args...))
out.WriteString("\n")
}
// Errorf prints the message to stderr, with a red ERROR prefix.
func Errorf(format string, args ...interface{}) {
if level < ErrorLevel {
return
}
out.WriteString(color.RedString("ERROR "))
out.WriteString(fmt.Sprintf(format, args...))
out.WriteString("\n")
}
// Error prints the message to stderr, with a red ERROR prefix.
func Error(msg string) {
if level < ErrorLevel {
return
}
out.WriteString(color.RedString("ERROR "))
out.WriteString(msg)
out.WriteString("\n")
}