Migrate from GitLab group repos to GitHub orgs in batch

migrate-gitlab-github.sh

# If you have a GitLab group repos that need to migrate to GitHub, currently the best option is to create a GitHub org
GITLAB_GROUP_NAME=your_gitlab_group_name
GITLAB_DOMAIN=gitlab.com:22
GITHUB_ORG_NAME=your_github_org_name
REPOS=("repo_1" "repo_2")
for REPO_NAME in ${REPOS[@]}; do
  git clone --mirror ssh://git@$GITLAB_DOMAIN/$GITLAB_GROUP_NAME/$REPO_NAME.git $REPO_NAME/.git
  cd $REPO_NAME
  git config --bool core.bare false
  git reset --hard
  # You can rename main branch here if the repo enabled PR process
  # git branch -m main main2
  git remote add target [email protected]:$GITHUB_ORG_NAME/$REPO_NAME.git
  # If the repo belongs to you, you can automatically create repo using GitHub CLI (See how to setup https://cli.github.com/)
  # gh repo create $GITHUB_ORG_NAME/$REPO_NAME --private
  git push --all target
  git push --tags target
  cd ..
  rm -rf $REPO_NAME
done