Fix 4435: panic when controllers package not found

CHANGELOG.md

@@ -4,3 +4,4 @@
 - Using fixed name `commentRouter.go` as generated file name. [4385](https://github.com/beego/beego/pull/4385)
 - Fix 4383: ORM Adapter produces panic when using orm.RegisterModelWithPrefix. [4386](https://github.com/beego/beego/pull/4386)
 - Fix 4444: panic when 404 not found. [4446](https://github.com/beego/beego/pull/4446)
+- Fix 4435: fix panic when controller dir not found.

server/web/admin.go

@@ -108,8 +108,11 @@ func registerAdmin() error {
 		c := &adminController{
 			servers: make([]*HttpServer, 0, 2),
 		}
+
+		// copy config to avoid conflict
+		adminCfg := *BConfig
 		beeAdminApp = &adminApp{
-			HttpServer: NewHttpServerWithCfg(BConfig),
+			HttpServer: NewHttpServerWithCfg(&adminCfg),
 		}
 		// keep in mind that all data should be html escaped to avoid XSS attack
 		beeAdminApp.Router("/", c, "get:AdminIndex")

server/web/hooks.go

@@ -6,6 +6,8 @@ import (
 	"net/http"
 	"path/filepath"
 
+	"github.com/coreos/etcd/pkg/fileutil"
+
 	"github.com/beego/beego/v2/core/logs"
 	"github.com/beego/beego/v2/server/web/context"
 	"github.com/beego/beego/v2/server/web/session"
@@ -98,7 +100,12 @@ func registerGzip() error {
 
 func registerCommentRouter() error {
 	if BConfig.RunMode == DEV {
-		if err := parserPkg(filepath.Join(WorkPath, BConfig.WebConfig.CommentRouterPath)); err != nil {
+		ctrlDir := filepath.Join(WorkPath, BConfig.WebConfig.CommentRouterPath)
+		if !fileutil.Exist(ctrlDir) {
+			logs.Warn("controller package not found, won't generate router: ", ctrlDir)
+			return nil
+		}
+		if err := parserPkg(ctrlDir); err != nil {
 			return err
 		}
 	}