Update scripts/unpack_data.sh

scripts/unpack_data.sh

@@ -0,0 +1,53 @@
+#!/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}"
+
+mkdir -p "${DATA_ROOT}"
+
+declare -A selected_archives=()
+
+while IFS= read -r archive; do
+  filename="$(basename "${archive}")"
+  base="${filename}"
+  if [[ "${filename}" == *.tar.zst ]]; then
+    base="${filename%.tar.zst}"
+  elif [[ "${filename}" == *.tar ]]; then
+    base="${filename%.tar}"
+  else
+    continue
+  fi
+
+  if [[ -n "${selected_archives[${base}]:-}" ]]; then
+    echo "found multiple archive variants for ${base} under ${ARCHIVE_DIR}; keep only one of .tar or .tar.zst" >&2
+    exit 1
+  fi
+  selected_archives["${base}"]="${archive}"
+done < <(find "${ARCHIVE_DIR}" -maxdepth 1 -type f \( -name '*.tar' -o -name '*.tar.zst' \) | sort)
+
+if [[ "${#selected_archives[@]}" -eq 0 ]]; then
+  echo "no archives found under ${ARCHIVE_DIR}" >&2
+  exit 1
+fi
+
+mapfile -t archive_bases < <(printf '%s\n' "${!selected_archives[@]}" | sort)
+for base in "${archive_bases[@]}"; do
+  archive="${selected_archives[${base}]}"
+  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}"