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logger.go
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logger.go
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package logger
import (
"bytes"
"encoding/json"
"fmt"
"io"
"os"
"strings"
"github.com/alecthomas/chroma/quick"
"github.com/logrusorgru/aurora"
"github.com/superfly/flyctl/internal/buildinfo"
"github.com/superfly/flyctl/internal/cmdutil"
"github.com/superfly/flyctl/iostreams"
)
type Level int
const (
Debug Level = iota
Info
Warn
Error
NoLogLevel = -1
)
type logSink interface {
WriteLog(level Level, line string)
UseAnsi() bool
Level() Level
}
type Logger struct {
inner logSink
}
func FromEnv(out io.Writer) *Logger {
return &Logger{inner: &WriterLogger{
out: out,
level: levelFromEnv(),
isTerm: iostreams.IsTerminalWriter(out),
}}
}
func New(out io.Writer, level Level, isTerm bool) *Logger {
return &Logger{inner: &WriterLogger{
out: out,
level: level,
isTerm: isTerm,
}}
}
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) write(level Level, prefix aurora.Value, v ...any) {
if l == nil {
return
}
line := fmt.Sprintf("%s %s\n", prefix.String(), fmt.Sprint(v...))
if !l.inner.UseAnsi() {
line = cmdutil.StripANSI(line)
}
l.inner.WriteLog(level, line)
}
func (l *Logger) Debug(v ...interface{}) {
if l == nil {
return
}
if str, ok := v[0].(string); ok {
byteString := []byte(str)
if json.Valid(byteString) {
var prettyJSON bytes.Buffer
err := json.Indent(&prettyJSON, byteString, "", " ")
if err == nil {
jsonStr := prettyJSON.String() + "\n"
if l.inner.UseAnsi() {
outBuf := &bytes.Buffer{}
quick.Highlight(outBuf, prettyJSON.String()+"\n", "json", "terminal", "monokai")
jsonStr = outBuf.String()
}
l.write(Debug, aurora.Faint("DEBUG"), jsonStr)
return
}
}
}
l.write(Debug, aurora.Faint("DEBUG"), v...)
}
func (l *Logger) Debugf(format string, v ...interface{}) {
l.Debug(fmt.Sprintf(format, v...))
}
func (l *Logger) Info(v ...interface{}) {
l.write(Info, aurora.Faint("INFO"), v...)
}
func (l *Logger) Infof(format string, v ...interface{}) {
l.Info(fmt.Sprintf(format, v...))
}
func (l *Logger) Warn(v ...interface{}) {
l.write(Warn, aurora.Yellow("WARN"), v...)
}
func (l *Logger) Warnf(format string, v ...interface{}) {
l.Warn(fmt.Sprintf(format, v...))
}
func (l *Logger) Error(v ...interface{}) {
l.write(Error, aurora.Red("ERROR"), v...)
}
func (l *Logger) Errorf(format string, v ...interface{}) {
l.Error(fmt.Sprintf(format, v...))
}
func (l *Logger) AndLogToFile() *Logger {
return &Logger{inner: &SplitLogger{
terminal: l.inner,
file: &globalLogFile,
}}
}
// Level returns the current log level, or NoLogLevel if not applicable
func (l *Logger) Level() Level {
return l.inner.Level()
}