====== Git ======

===== Splitting a subdirectory into a new repository =====
To remove 'subdir' from old.git to new.git

{{Root|<code bash>
git clone old.git new
cd new
git filter-branch --subdirectory-filter 'subdir' HEAD
  - Add `-- --all` for branches and tags
git reset --hard
git gc --aggressive
git prune

cd ..
git clone --bare new new.git
git remote rm origin
rm -r new.git/refs/originals
git reflog expire --expire=now --all
git gc --aggressive
git prune

cd ../
cd old.git
git filter-branch --index-filter "git rm -r -f --cached --ignore-unmatched 'subdir'" --prune-empty HEAD
</code>}}

Checkout new copies of old.git and new.git on all affected machines.