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logger.go
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logger.go
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package logger
import (
"fmt"
"io"
"os"
"strings"
"github.com/logrusorgru/aurora"
"github.com/superfly/flyctl/internal/buildinfo"
)
type Level int
const (
Debug Level = iota
Info
Warn
Error
)
type Logger struct {
out io.Writer
level Level
}
func FromEnv(out io.Writer) *Logger {
return &Logger{
out: out,
level: levelFromEnv(),
}
}
func levelFromEnv() Level {
lit, ok := os.LookupEnv("LOG_LEVEL")
if !ok && buildinfo.IsDev() {
lit = "warn"
} else {
lit = strings.ToLower(lit)
}
switch lit {
default:
return Info
case "debug":
return Debug
case "warn":
return Warn
case "error":
return Error
}
}
func (l *Logger) debug(v ...interface{}) {
fmt.Fprintln(
l.out,
aurora.Faint("DEBUG"),
fmt.Sprint(v...),
)
}
func (l *Logger) Debug(v ...interface{}) {
if l.level <= Debug {
l.debug(v...)
}
}
func (l *Logger) Debugf(format string, v ...interface{}) {
if l.level <= Debug {
l.debug(fmt.Sprintf(format, v...))
}
}
func (l *Logger) info(v ...interface{}) {
fmt.Fprintln(
l.out,
aurora.Faint("INFO"),
fmt.Sprint(v...),
)
}
func (l *Logger) Info(v ...interface{}) {
if l.level <= Info {
l.info(v...)
}
}
func (l *Logger) Infof(format string, v ...interface{}) {
if l.level <= Info {
l.info(fmt.Sprintf(format, v...))
}
}
func (l *Logger) warn(v ...interface{}) {
fmt.Fprintln(
l.out,
aurora.Yellow("WARN"),
fmt.Sprint(v...),
)
}
func (l *Logger) Warn(v ...interface{}) {
if l.level <= Warn {
l.warn(v...)
}
}
func (l *Logger) Warnf(format string, v ...interface{}) {
if l.level <= Warn {
l.warn(fmt.Sprintf(format, v...))
}
}
func (l *Logger) error(v ...interface{}) {
fmt.Fprintln(
l.out,
aurora.Red("ERROR"),
fmt.Sprint(v...),
)
}
func (l *Logger) Error(v ...interface{}) {
if l.level <= Error {
l.error(v...)
}
}
func (l *Logger) Errorf(format string, v ...interface{}) {
if l.level <= Error {
l.error(fmt.Sprintf(format, v...))
}
}