Git单独checkout子目录

节选自

http://jasonkarns.com/blog/subdirectory-checkouts-with-git-sparse-checkout/

Existing Repository

If you already have a repository, simply enable and configure sparse-checkout as above and do git read-tree.

1. Enable sparse-checkout:

   git config core.sparsecheckout true

2. Configure sparse-checkout by listing your desired sub-trees in .git/info/sparse-checkout:

   echo some/dir/ >> .git/info/sparse-checkout
   echo another/sub/tree >> .git/info/sparse-checkout

3. Update your working tree:

   git read-tree -mu HEAD