Migrate Git directory to it's own repository

So say we have an existing Git project "CoolProject" like this

• projects/coolproject/

• projects/coolproject/subproject/

So it was all and well, but now we think it would make much more sense for subproject to be it's own project with it's own git repo.

But we'd like to move that without loosing all the history and stuff.

As usual Git can do it, as usual it's not all that easy to figure out:

First we create a temporary clone of the project in /tmp



Then we make SubProject the root, removing the rest, by using git filter-branch



Then we create a new clone of that for a clean-trimmed down project:



Now do some cleanup to remove all history stuff we no longer care about and reduce the repo size:



Now maybe we have created an empty repo for subproject on bitbucket or somewhere else, so we can do the "initial" push/mirror there:


Finally, now that it's in a clean state, we can pull the clean project from the new repo:



Now we have a nice new clean subproject project in projects/subproject , only thing left would be to remove SubProject from CoolProject and push that if you want to

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