Migrate gitmodules from https to ssh

migrate_git_submodule_https_ssh.sh

#!/usr/bin/env bash
set -e
git config -f .gitmodules --get-regexp 'submodule\..*\.path' | while read -r key submodule_path; do
  http_url=$(git config --file .gitmodules --get submodule.$submodule_path.url)
  ssh_url=${http_url/https:\/\/github.com\//[email protected]:}

  git config -f .gitmodules submodule.$submodule_path.url $ssh_url
  git config -f .gitmodules submodule.$submodule_path.shallow true

  echo "Updated $submodule_name ($submodule_path) URL:"
  echo "  From: $http_url"
  echo "  To:   $ssh_url"
done