#!/usr/bin/env bash
# Put dist/ on the `site` branch, which holds build output and nothing else.
# git-sync follows that branch; there is no image and no rollout.
#
# The orphan branch is named per-run and deleted in the trap. A fixed name
# survives the worktree and collides on the second run, which it did twice.
set -euo pipefail
cd "$(dirname "$0")/.."
[ -d dist ] || { echo "no dist/ — run npm run build first" >&2; exit 1; }
ROOT=$PWD
SHA=$(git rev-parse --short HEAD)
TMP="publish-$$"
WORK=$(mktemp -d)
cleanup() {
  git -C "$ROOT" worktree remove --force "$WORK" 2>/dev/null || true
  rm -rf "$WORK"
  git -C "$ROOT" branch -qD "$TMP" 2>/dev/null || true
}
trap cleanup EXIT
git worktree add -q --detach "$WORK"
cd "$WORK"
git checkout -q --orphan "$TMP"
git rm -rq --cached . 2>/dev/null || true
find . -mindepth 1 -maxdepth 1 ! -name .git -exec rm -rf {} +
mkdir dist && cp -R "$ROOT/dist/." dist/
git add -A
git commit -q -m "site: built from $SHA"
git push -qf origin HEAD:site
cd "$ROOT"
echo "published site branch from $SHA"