Create a new repository from an existing repository. Wipes out git history.

new-repo-from-repo.sh

# shellcheck shell=bash
# shellcheck disable=2001
#
# If using this as zsh function snippet, remove the .sh file extension
#
# Creates a new repository from an existing repository
# All git history is removed
# $1: git url of the original repository to use to create a new repository from
# $2: name of the new repository including the github user name. This repository must already exist in github.
#    For example: apolopena/gitpod-laravel-starter
# $3: optional commit message to use.

main() {
  local url new_repo msg user
  url="$1"
  new_repo="$(echo "$2" | awk -F/ '{print $2}')"
  if [[ -z "$3" ]]; then
    msg="Initial commit built from $url"
  else
    msg="$3"
  fi
  user="$(echo "$2" | awk -F/ '{print $1}')"
  mkdir "$new_repo" &&
  cd "$new_repo" &&
  git clone "$url" . &&
  rm -rf .git &&
  git init &&
  git add -A &&
  git commit -m "$msg" &&
  git remote add origin "https://github.com/$user/$new_repo.git" &&
  git branch -m main &&
  git push -u origin main
}
main "$@"