Low-level function for reading metadata and deserialising it. This
function can be used to directly read a metadata json file without
reference to a root which contains it. It may be useful in the
context of reading a metadata file written out as part of a failed
run (see the insert = FALSE argument to
outpack_packet_end())
outpack_metadata_read(path)Path to the json file
A list of outpack metadata; see the schema for details. In
contrast to reading the json file directly with
jsonlite::fromJSON, this function will take care to convert
scalar and length-one vectors into the expected types.