#!/usr/bin/env bash

# FIXME: Add checks
# FIXME: Add logging
REPO=$(realpath "$PWD");
TARGET_DIR="$1";
BRANCH="$2";

env

function perform_clone_or_pull {
  target="$1";
  echo "Checking out working copy to remote: $target"
  if [ ! -e "$target/.git" ]; then
    git clone "$REPO" "$target";
  fi
  (
    cd "$target";
    echo "Working directory: $target"
    git fetch
    git checkout origin/$BRANCH
  )
  echo "Working copy checked out";
}

while read old_rew new_rew ref; do
  if [ "$ref" == "refs/heads/$BRANCH" ]; then
    perform_clone_or_pull "$TARGET_DIR";
  fi;
done;