AFAIK (I have a few friends who have written for O'reilly) this is their canonical mode of publishing. It uses Git and Asciidoctor (not asciidoc) with a few additional plugins
[1] http://www.balisage.net/Proceedings/vol10/print/Kleinfeld01/...
[2] https://github.com/oreillymedia/HTMLBook
AFAIK (I have a few friends who have written for O'reilly) this is their canonical mode of publishing. It uses Git and Asciidoctor (not asciidoc) with a few additional plugins