File generators

[facundoolano]

There are cases when I'd like to have the same template instantiated multiple times for each value of an array. The most obvious case is dynamically generating a blog archive and an rss feed file for each tag in the website. The same could apply for languages (e.g. using the same blog index for 'es', 'en' and 'all' without duplicating the files).

I haven't figured out what a reasonable interface for this feature would be.

[dtomvan]

This would also be nice for supporting rel=tag, since currently the tags pages generated rely on fragments for specifying which tag to jump to, which isn't supported by that format.

We could have something like src/tags/{site.tags}.html maybe? Analogous to {% for tag in site.tags %} in the liquid templates?