Add submodule Git

Using Git submodules you can attach other Git repositories to your current Git repostory at a specific path. This allows you to commit, pull, and push there repositories independently. You can add as many Git submodules as you need.

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git submodule add git@bitbucket.org:user/repo a/submodule
git submodule update --init --recursive

Download the GitHub Gist add-git-submodule.sh