Replace zerolog with log/slog from stdlib

- Rewrite logger package to use slog with LevelVar for dynamic levels
- Update all packages to use *slog.Logger instead of *zerolog.Logger
- Use TextHandler for TTY (dev), JSONHandler for production
- Add make check target (runs lint + test)
- Add make test target

internal/server/http.go

@@ -20,9 +20,9 @@ func (s *Server) serveUntilShutdown() {
 	// this does any necessary setup in each handler
 	s.SetupRoutes()
 
-	s.log.Info().Str("listenaddr", listenAddr).Msg("http begin listen")
+	s.log.Info("http begin listen", "listenaddr", listenAddr)
 	if err := s.httpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
-		s.log.Error().Msgf("listen:%+s\n", err)
+		s.log.Error("listen error", "error", err)
 		if s.cancelFunc != nil {
 			s.cancelFunc()
 		}

internal/server/server.go

@@ -3,6 +3,7 @@ package server
 import (
 	"context"
 	"fmt"
+	"log/slog"
 	"net/http"
 	"os"
 	"os/signal"
@@ -14,7 +15,6 @@ import (
 	"git.eeqj.de/sneak/gohttpserver/internal/handlers"
 	"git.eeqj.de/sneak/gohttpserver/internal/logger"
 	"git.eeqj.de/sneak/gohttpserver/internal/middleware"
-	"github.com/rs/zerolog"
 	"go.uber.org/fx"
 
 	"github.com/getsentry/sentry-go"
@@ -43,7 +43,7 @@ type Server struct {
 	startupTime   time.Time
 	exitCode      int
 	sentryEnabled bool
-	log           *zerolog.Logger
+	log           *slog.Logger
 	ctx           context.Context
 	cancelFunc    context.CancelFunc
 	httpServer    *http.Server
@@ -103,10 +103,10 @@ func (s *Server) enableSentry() {
 		Release: fmt.Sprintf("%s-%s", s.params.Globals.Appname, s.params.Globals.Version),
 	})
 	if err != nil {
-		s.log.Fatal().Err(err).Msg("sentry init failure")
-		return
+		s.log.Error("sentry init failure", "error", err)
+		os.Exit(1)
 	}
-	s.log.Info().Msg("sentry error reporting activated")
+	s.log.Info("sentry error reporting activated")
 	s.sentryEnabled = true
 }
 
@@ -121,7 +121,7 @@ func (s *Server) serve() int {
 		signal.Notify(c, os.Interrupt, syscall.SIGTERM)
 		// block and wait for signal
 		sig := <-c
-		s.log.Info().Msgf("signal received: %+v", sig)
+		s.log.Info("signal received", "signal", sig)
 		if s.cancelFunc != nil {
 			// cancelling the main context will trigger a clean
 			// shutdown.
@@ -140,7 +140,7 @@ func (s *Server) serve() int {
 }
 
 func (s *Server) cleanupForExit() {
-	s.log.Info().Msg("cleaning up")
+	s.log.Info("cleaning up")
 	// FIXME unimplemented
 	// close database connections or whatever
 }
@@ -150,9 +150,7 @@ func (s *Server) cleanShutdown() {
 	s.exitCode = 0
 	ctxShutdown, shutdownCancel := context.WithTimeout(context.Background(), 5*time.Second)
 	if err := s.httpServer.Shutdown(ctxShutdown); err != nil {
-		s.log.Error().
-			Err(err).
-			Msg("server clean shutdown failed")
+		s.log.Error("server clean shutdown failed", "error", err)
 	}
 	if shutdownCancel != nil {
 		shutdownCancel()