#!/bin/bash

# Fail on any error.
set -e

# Directory that holds the cached packages.
cache_dir="${1}"

# Root directory to untar the cached packages to.
# Typically filesystem root '/' but can be changed for testing.
cache_restore_root="${2}"

cache_filepaths="$(ls -1 "${cache_dir}" | sort)"
echo "Found $(echo "${cache_filepaths}" | wc -w) files in the cache."
for cache_filepath in ${cache_filepaths}; do
  echo "- $(basename "${cache_filepath}")"
done

echo "Reading from manifest..."
for logline in "$(cat "${cache_dir}/manifest.log" | tr ',' '\n' )"; do
  echo "- $(echo "${logline}" | tr ':' ' ')"
done
echo "done."

# Only search for archived results. Manifest and cache key also live here.
cache_pkg_filepaths=$(ls -1 ${cache_dir}/*.tar.gz | sort)
cache_pkg_filecount=$(echo "${cache_pkg_filepaths}" | wc -w)
echo "Restoring ${cache_pkg_filecount} packages from cache..."
for cache_pkg_filepath in ${cache_pkg_filepaths}; do
  echo -n "- $(basename "${cache_pkg_filepath}") restoring..."
  sudo tar -xf ${cache_pkg_filepath} -C ${cache_restore_root} > /dev/null
  echo "done."
done
echo "done."