Hi! Thank you for a nice gem.

I'm trying to play with it on OS X machine with some huge RAR archives (3 GiBs with files of 2 and 18 GBcompressed XML in it).

Libarchive wiki says, that RAR format is supported since 3.0, so I've installed latest libarchive (3.2.1) from Homebrew.

But I'm trying next snippet:

require 'archive_io'
archive = ArchiveIO.open(File.expand_path('~/Downloads/fias_xml.rar'))
archive.each { |cursor| puts cursor.pathname }

and getting such an error:

ArchiveIO::LibArchive::Error: Unrecognized archive format

Questions

1. How I can get know which libarchive (system or from Homebrew) is being used?
2. How I can tell Ruby FFI to use libarchive from Homebrew?

I've played with Ruby's $LOAD_PATH and system LD_LIBRARY_PATH environment variable, but with no luck (tried to feed /usr/local/opt/libarchive/lib to them).

Any thoughts?

You can download archive for testing from this page: http://fias.nalog.ru/Updates.aspx (e.g. http://fias.nalog.ru/Public/Downloads/20160825/fias_delta_xml.rar )