#!/usr/bin/env bash
set -eux

SCRIPT_DIR=$(dirname "$0")
REPO_ROOT=$(realpath "$SCRIPT_DIR/../../..")
cd "$REPO_ROOT"

if [[ "$VERCEL_ENV" == "production" ]] ; then
  echo "Always build on production";
  exit 1;
fi

## main is not production anymore, but we still always want to build it
if [[ "$VERCEL_GIT_COMMIT_REF" == "main" ]] ; then
  echo "Always build on main";
  exit 1;
fi

## on PR builds, only rebuild if the tldraw-new directory changed
git diff HEAD^ HEAD --quiet -- "./apps/tldraw-new/"