feat: 优雅关闭与模板错误检查

main.go

@@ -1,12 +1,17 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"html/template"
 	"log"
+	"net/http"
 	"os"
+	"os/signal"
 	"path/filepath"
 	"strings"
+	"syscall"
+	"time"
 
 	"github.com/gin-gonic/gin"
 
@@ -54,7 +59,11 @@ func main() {
 		}
 		// Use the relative path as template name (e.g. "layouts/base.html")
 		name := strings.TrimPrefix(path, "templates/")
-		tmpl, _ = tmpl.New(name).Parse(string(data))
+		t, parseErr := tmpl.New(name).Parse(string(data))
+		if parseErr != nil {
+			log.Fatalf("failed to parse template %s: %v", name, parseErr)
+		}
+		tmpl = t
 		return nil
 	})
 	r.SetHTMLTemplate(tmpl)
@@ -95,8 +104,28 @@ func main() {
 	r.GET("/api/repos/:id/review/notes", review.GetNotes)
 	r.POST("/api/repos/:id/review/pdf", review.GeneratePDF)
 
-	log.Printf("PR-Helper starting on :%s", cfg.Port)
-	if err := r.Run(":" + cfg.Port); err != nil {
-		log.Fatalf("failed to start server: %v", err)
+	// Graceful shutdown with signal handling
+	srv := &http.Server{
+		Addr:    ":" + cfg.Port,
+		Handler: r,
 	}
+
+	go func() {
+		log.Printf("PR-Helper starting on :%s", cfg.Port)
+		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			log.Fatalf("failed to start server: %v", err)
+		}
+	}()
+
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
+	log.Println("shutting down server...")
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	if err := srv.Shutdown(ctx); err != nil {
+		log.Fatalf("server forced to shutdown: %v", err)
+	}
+	log.Println("server exited")
 }