Backends as Stream

Hi,
last night I was talking with Aslak and we found an improvement on backends. Nowdays backends are set as directory using templateDir .

Then in that directory you should create  a directory like:

block_admonition.html.slim and then you add the content in slim format in this case.

We think that it would be useful that we can add backends definition programmatically as stream. Something like:

{:block_amonition.html.slim => stream}

The stream could be in case of Java any instance of InputStream so for example you could store your backends to a site and refer it directly without having to download locally.

This can be done in AsciidoctorJ by intercepting streams and populate into temp directory, but f it could be implemented in Ruby all Asciidoctor users could use it.

WDYT?

Stream's are a bit difficult to read multiple times of course..

But {:block_amonition.html.slim => content_string} would work as a charm :)

Good point then as string, this would require some changes on public API, and for example a way to give a template a name so it can be loaded on demand, or for example decide that if you register a template programmatically then it is loaded by default for all invocations. But I think it would be more flexible (and I am thinking of a Java EE application) to be able to enable or disable or create them dynamically.