Restore gitsubmodules from a previous project

Ever wanted to use a previous project to seed a new one?
We often have to do that. With re-using an existing project, we typically need to see our git
repo with also the submodules
that were used.
Here is a script that does just that!
#!/bin/sh
# credit: https://stackoverflow.com/questions/11258737/restore-git-submodules-from-gitmodules
set -e
git config -f .gitmodules --get-regexp '^submodule\..*\.path$' |
while read path_key path
do
url_key=$(echo $path_key | sed 's/\.path/.url/')
url=$(git config -f .gitmodules --get "$url_key")
git submodule add $url $path
done
Simply run it bash ./shell/restore-git-submodules-from-gitmodules.sh
and all the submodules should be in the new repo!