Allows to add custom user-defined log levels to slog.
go get github.com/ValerySidorin/slog-leveler
Another slog helpers:
- shslog:
hclog.Loggeradapter for*slog.Logger
This is the preferred method. Use it, when your handler options allow you to define custom ReplaceAttr function.
import (
"context"
"log/slog"
"os"
slogleveler "github.com/ValerySidorin/slog-leveler"
)
const (
LogLevelTrace = slog.LevelDebug - 1
LogLevelFatal = slog.LevelError + 1
)
var (
traceLevel, _ = slogleveler.NewLevel(LogLevelTrace, "TRACE")
fatalLevel, _ = slogleveler.NewLevel(LogLevelFatal, "FATAL")
)
leveler, _ := slogleveler.New(
slogleveler.WithLevel(traceLevel),
slogleveler.WithLevel(fatalLevel))
slogger := slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{
ReplaceAttr: leveler.ReplaceLevels,
Level: LogLevelTrace,
}))
slogger.Log(context.Background(), LogLevelTrace, "DEBUG-1 log 2", "key", "value")
slogger.Log(context.Background(), LogLevelFatal, "ERROR+1 log 2", "key", "value")Leveler can rewrite log level and pass entry to next io.Writer.
import (
"context"
"log/slog"
"os"
slogleveler "github.com/ValerySidorin/slog-leveler"
)
const (
LogLevelTrace = slog.LevelDebug - 1
LogLevelFatal = slog.LevelError + 1
)
var (
traceLevel, _ = slogleveler.NewLevel(LogLevelTrace, "TRACE")
fatalLevel, _ = slogleveler.NewLevel(LogLevelFatal, "FATAL")
)
leveler, _ := slogleveler.New(
slogleveler.WithWriter(os.Stdout),
slogleveler.WithLevel(traceLevel),
slogleveler.WithLevel(fatalLevel))
slogger := slog.New(slog.NewTextHandler(leveler,
&slog.HandlerOptions{
Level: LogLevelTrace,
}))
slogger.Log(context.Background(), LogLevelTrace, "DEBUG-1 log 1", "key", "value")
slogger.Log(context.Background(), LogLevelFatal, "ERROR+1 log 1", "key", "value")