After some time I spent staring at the jbake code, I figured out that if I declare my own property in jbake.properties :
...
foo=bar
...
I can reuse that in files that go through a template engine by referencing it as ${config.foo}. I'd like to have this substitution working also on the content lvl, i.e. for files written in asciidoc, living inside the content directory.
Is there any non-trivial way to achieve it? How can I make the templating engine to proccess the result of asciidoc parses engine, or make it running it before the asciidoctor?
I found the answer myself.
To use the property substitution in asciidoc files, add following to the jbake.properties:
...
asciidoctor.attributes.export=true
foo=world
...
and reference the variable in aFile.adoc this way:
Hello {foo}!