Loading External Gems with GEM_PATH

By default, AsciidoctorJ comes with all required gems bundled within the jar. But in some circumstances like OSGi environments you may require to store gems in an external folder and be loaded by AsciidoctorJ.

As the Java interface org.asciidoctor.Asciidoctor and its factory org.asciidoctor.Asciidoctor.Factory are agnostic to JRuby there are the interface org.asciidoctor.jruby.AsciidoctorJRuby and org.asciidoctor.jruby.AsciidoctorJRuby.Factory that allow to get an Asciidoctor instance using JRuby with a certain GEM_PATH. Note that org.asciidoctor.jruby.AsciidoctorJRuby directly extends org.asciidoctor.Asciidoctor.

Example of setting GEM_PATH

import static org.asciidoctor.jruby.AsciidoctorJRuby.Factory.create;
import org.asciidoctor.Asciidoctor;

Asciidoctor asciidoctor = create("/my/gem/path"); (1)

1	Creates an `Asciidoctor` instance with given `GEM_PATH` location.