scripts/unpack_data.sh

#!/usr/bin/env bash
set -euo pipefail

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
ARCHIVE_DIR="${ROOT_DIR}/data"
DATA_ROOT="${1:-${ROOT_DIR}/data}"
EXPECTED_BASES=(
  "test_videos"
  "train_videos"
)

mkdir -p "${DATA_ROOT}"

archives=()
for base in "${EXPECTED_BASES[@]}"; do
  matches=()
  for suffix in ".tar" ".tar.zst"; do
    candidate="${ARCHIVE_DIR}/${base}${suffix}"
    if [[ -f "${candidate}" ]]; then
      matches+=("${candidate}")
    fi
  done

  if [[ "${#matches[@]}" -eq 0 ]]; then
    echo "missing expected archive under ${ARCHIVE_DIR}: ${base}.tar or ${base}.tar.zst" >&2
    exit 1
  fi
  if [[ "${#matches[@]}" -gt 1 ]]; then
    echo "found multiple archive variants for ${base} under ${ARCHIVE_DIR}; keep only one of .tar or .tar.zst" >&2
    exit 1
  fi

  archives+=("${matches[0]}")
done

for archive in "${archives[@]}"; do
  echo "extracting ${archive}"
  case "${archive}" in
    *.tar.zst)
      tar --zstd -xf "${archive}" -C "${DATA_ROOT}"
      ;;
    *.tar)
      tar -xf "${archive}" -C "${DATA_ROOT}"
      ;;
    *)
      echo "unsupported archive format: ${archive}" >&2
      exit 1
      ;;
  esac
done

echo "raw data extracted into ${DATA_ROOT}"