zsh/bash alias to cd into git repo root

cd-git-root.sh

# append to .zshrc or .bashrc

# cd into git root
function gr() {

  # check in git repo:
  if ! git rev-parse --is-inside-work-tree &>/dev/null; then
    echo "not in git repo"
    return 1
  fi
  
  rel=$(realpath --relative-to=$(pwd) $(git rev-parse --show-toplevel))
  
  if [[ $rel == "." ]]; then
    echo "already in root"
    return 0
  fi

  echo "cd $rel # $(git rev-parse --show-toplevel)"
  cd $(git rev-parse --show-toplevel)
}