[Ravenwood] Cache list-ravenwood-tests.sh result

# List all the ravenwood test modules.

jq -r 'to_entries[] | select( .value.compatibility_suites | index("ravenwood-tests") ) | .key' "$OUT/module-info.json" | sort

set -e

in="$OUT/module-info.json"

cache="$OUT/ravenwood-test-list.cached.tmp"

cache_temp="$OUT/ravenwood-test-list.temp.tmp"

if [[ "$in" -nt "$cache" ]] ; then

    rm -f "$cache_temp" "$cache"

    # First, create to a temp file, and once it's completed, rename it

    # to the actual cache file, so that if the command failed or is interrupted,

    # we don't update the cache.

    jq -r 'to_entries[] | select( .value.compatibility_suites | index("ravenwood-tests") ) | .key' "$OUT/module-info.json" | sort > "$cache_temp"

    mv "$cache_temp" "$cache"

fi

cat "$cache"