add WithConfig (#70)

gcp/log/log.go

@@ -19,11 +19,11 @@ import (
 	"go.opentelemetry.io/otel/trace"
 )
 
-// Handler returns a slog.Handler integrated with [Cloud Logging] and [Cloud Error Reporting].
+// Logger returns a slog.Logger which integrates with [Cloud Logging] and [Cloud Error Reporting].
 //
 // [Cloud Logging]: https://cloud.google.com/logging
 // [Cloud Error Reporting]: https://cloud.google.com/error-reporting
-func Handler(opts ...Option) slog.Handler {
+func Logger(opts ...Option) *slog.Logger {
 	option := options{}
 	for _, opt := range opts {
 		opt(&option)
@@ -58,5 +58,5 @@ func Handler(opts ...Option) slog.Handler {
 	)
 	handler = otel.New(handler)
 
-	return handler
+	return slog.New(handler)
 }

gcp/log/log_test.go

@@ -14,7 +14,7 @@ import (
 func TestLogHandler(t *testing.T) {
 	t.Parallel()
 
-	assert.NotNil(t, log.Handler(
+	assert.NotNil(t, log.Logger(
 		log.WithService("test"),
 		log.WithVersion("dev"),
 		log.WithProject("project"),

option.go

@@ -50,11 +50,11 @@ func WithStopGate(gates ...func(context.Context) error) Option {
 	}
 }
 
-// WithLogHandler provides a slog.Handler to handle logs.
-func WithLogHandler(handler slog.Handler) Option {
+// WithLogger provides a slog.Logger to handle logs.
+func WithLogger(logger *slog.Logger) Option {
 	return func(*options) {
-		slog.SetDefault(slog.New(handler))
-		slog.Info("Log handler has been initialized.")
+		slog.SetDefault(logger)
+		slog.Info("Logger has been initialized.")
 	}
 }