#!/usr/bin/env bash

# Store or restore the node_modules cache on Linux / macOS.

#

# Usage:

# cache.sh archive # create .build/node_modules_cache/node-modules.tzst (cache miss)

# cache.sh extract # restore .build/node_modules_cache/node-modules.tzst (cache hit)

#

# Uses multi-threaded zstd. The archive must NOT be named cache.tzst because

# actions/cache reserves that name and excludes it from the saved cache. The

# archive and extract flags must stay compatible; if you change the format

# here, bump build/.cachesalt to invalidate old caches.

set -e

case "$1" in

archive)

node build/azure-pipelines/common/listNodeModules.ts .build/node_modules_list.txt

mkdir -p .build/node_modules_cache

tar --use-compress-program='zstd -T0 -3' -cf .build/node_modules_cache/node-modules.tzst --files-from .build/node_modules_list.txt

;;

extract)

tar --use-compress-program='zstd -d -T0' -xf .build/node_modules_cache/node-modules.tzst

;;

*)

echo "Usage: $0 {archive|extract}" >&2

exit 1

;;

esac