From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konstantin Khomoutov <flatworm@users.sourceforge.net>
Subject: Re: how to merge sub directory or file?
Date: Mon, 7 Nov 2011 19:37:08 +0400
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To: Emily <lingyan.ren@gmail.com>
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On Mon, 7 Nov 2011 22:54:18 +0800
Emily <lingyan.ren@gmail.com> wrote:

> I have two git projects A and B, content of B is subset of A. For
> example, Project  A and B's tree are as below:
[...]
> When there's new changes in project A, how can I merge them to
> project B without changing B's directory structure?
> 
> Your help will be highly appreciated.
Subtree merging maybe?
See http://progit.org/book/ch6-7.html