#!/usr/bin/env bash
# Build the small overlay archive for an already-installed TRACE study bundle.
set -euo pipefail

ROOT="$(cd "$(dirname "$0")/.." && pwd)"
STAMP="${1:-$(date -u +%Y%m%d)}"
DEST="$ROOT/dist/trace-study-day2-patch-$STAMP.tar.gz"
STAGE="$(mktemp -d)"
trap 'rm -rf "$STAGE"' EXIT

FILES=(
  README-DAY2.md
  orchestrator.py
  run_study.sh
  schedule_day2.json
  schedule_day2_test.json
  verify_day2.py
  workloads.py
)

mkdir -p "$STAGE/trace-study" "$ROOT/dist"
for file in "${FILES[@]}"; do
  cp -p "$ROOT/trace-study/$file" "$STAGE/trace-study/$file"
done

(
  cd "$STAGE/trace-study"
  shasum -a 256 "${FILES[@]}" > DAY2-CODE-SHA256SUMS
)

COPYFILE_DISABLE=1 tar -czf "$DEST" -C "$STAGE" trace-study
(
  cd "$(dirname "$DEST")"
  shasum -a 256 "$(basename "$DEST")"
) > "$DEST.sha256"

echo "built:"
ls -lh "$DEST" "$DEST.sha256"
echo
echo "contents:"
tar -tzf "$DEST"
echo
cat "$DEST.sha256"