问题：

提交后报如下异常:

$ git add .　　　　　　　　　　　　

warning: adding embedded git repository:xxxxxxxxxx
hint: You've added another git repository inside your current repository.
hint: Clones of the outer repository will not contain the contents of
hint: the embedded repository and will not know how to obtain it.
hint: If you meant to add a submodule, use:
hint:
hint: git submodule add <url>xxxxxxxxxx
hint:
hint: If you added this path by mistake, you can remove it from the
hint: index with:
hint:
hint: git rm --cached   xxxx
hint:
hint: See "git help submodule" for more information.

原因：

即在本地初始化的仓库(使用 git init的文件夹) 中的某一个文件夹，也含有 .git 文件 。

解决：

删除子文件夹里的.git文件，然后重新add、commit、push