Comment by davidroetzel

Please note that asciidoctor already is an alternative implementation. The original asciidoc tool (http://www.methods.co.nz/asciidoc/index.html) is written in python.

Both, the original and asciidoctor, offer a CLI tool to convert asciidoc to different formats (and there is always pandoc). Additionally, asciidoctor aims to integrate with JVM languages courtesy of JRuby. So you have multiple implementations callable (in one way or another) from any language imaginable.