Convert a Git folder to a submodule retrospectively?

Question

Quite often it is the case that you\'re writing a project of some kind, and after a while it becomes clear that some component of the project is actually useful as a standal

Answer 1

To isolate a subdirectory into its own repository, use filter-branch on a clone of the original repository:

git clone  
cd 
git filter-branch --subdirectory-filter 'path/to/your/submodule' --prune-empty -- --all

It's then nothing more than deleting your original directory and adding the submodule to your parent project.