fix

Author: lunny

routers/web/repo/setting/setting.go

@@ -207,7 +207,15 @@ func handleSettingsPostUpdate(ctx *context.Context) {
 	repo.Website = form.Website
 	repo.IsTemplate = form.Template
 
-	if err := repo_service.UpdateRepository(ctx, repo, false); err != nil {
+	// Visibility of forked repository is forced sync with base repository.
+	visibilityChanged := false
+	if repo.IsFork {
+		preVisibility := repo.IsPrivate
+		repo.IsPrivate = repo.BaseRepo.IsPrivate || repo.BaseRepo.Owner.Visibility == structs.VisibleTypePrivate
+		visibilityChanged = preVisibility != repo.IsPrivate
+	}
+
+	if err := repo_service.UpdateRepository(ctx, repo, visibilityChanged); err != nil {
 		ctx.ServerError("UpdateRepository", err)
 		return
 	}