ruby-OpenSCAP 
Description
An FFI wrapper around the OpenSCAP library.
Features/problems
Current version supports minimal set of functions needed to build own scanner. This gem is self documented by its test suite.
Sample Scanner Implementation
require 'openscap'
s = OpenSCAP::Xccdf::Session.new("ssg-fedora-ds.xml")
s.load
s.profile = "xccdf_org.ssgproject.content_profile_common"
s.evaluate
s.export_results(:rds_file => "results.rds.xml")
s.destroy
Development Requirements
On Fedora, commands are
dnf install openscap
bundle install
Test Requirements
On Fedora, more packages are necessary, but rubocop can be of the latest version
dnf install bzip2
Tests are then performed using script
./runtest.sh