helper to clone a repo for inspection (relatively) cheaply

cheap_clone.sh

function cheap_clone {
  EXTERNAL_CLONE_DIR="~/code/external"
  # mkdir -p $EXTERNAL_CLONE_DIR

  GIT_HOST='github.com'
  BRANCH='master'
  while [[ $# -gt 0 ]]
  do
      key="$1"
      case $key in
          -h|--host)
              GIT_HOST=$2
              shift # past argument
              shift # past value
              ;;
          -b|--branch)
              BRANCH=$2
              shift # past argument
              shift # past value
              ;;
          *)
              REPO=$key
              shift # past argument
              ;;
      esac
  done

  if [ -z "$REPO" ]
  then
      echo $REPO
      echo "ERROR: positional argument repo must be supplied"
      return
  fi
  
  cd $EXTERNAL_CLONE_DIR

  git clone --depth 1 \
    --single-branch --branch $BRANCH \
    git@${GIT_HOST}:${REPO}.git ${REPO}

  cd $REPO 
}