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Go
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566package log
import ( "context" "log/slog" "os"
"github.com/charmbracelet/log")
func NewHandler(name string) slog.Handler { return log.NewWithOptions(os.Stderr, log.Options{ ReportTimestamp: true, Prefix: name, Level: log.DebugLevel, })}
func New(name string) *slog.Logger { return slog.New(NewHandler(name))}
func NewContext(ctx context.Context, name string) context.Context { return IntoContext(ctx, New(name))}
type ctxKey struct{}
// IntoContext adds a logger to a context. Use FromContext to// pull the logger out.func IntoContext(ctx context.Context, l *slog.Logger) context.Context { return context.WithValue(ctx, ctxKey{}, l)}
// FromContext returns a logger from a context.Context;// if the passed context is nil, we return the default slog// logger.func FromContext(ctx context.Context) *slog.Logger { if ctx != nil { v := ctx.Value(ctxKey{}) if v == nil { return slog.Default() } return v.(*slog.Logger) }
return slog.Default()}
// sublogger derives a new logger from an existing one by appending a suffix to its prefix.func SubLogger(base *slog.Logger, suffix string) *slog.Logger { // try to get the underlying charmbracelet logger if cl, ok := base.Handler().(*log.Logger); ok { prefix := cl.GetPrefix() if prefix != "" { prefix = prefix + "/" + suffix } else { prefix = suffix } return slog.New(NewHandler(prefix)) }
// Fallback: no known handler type return slog.New(NewHandler(suffix))}