[RFC] Incremental building

[chrisdmacrae]

I would like to take a crack at incremental building in the next year.

Summary

As assets are processed during the initial build, we will build a dependency graph of the assets, building an abstract syntax tree of the build.

This will require us to do a few things:

• Have a method for building an AST for a given template engine, extracting it's unique dependencies. (this is not easy)
• extrapolate dependencies from pagination
• extrapolate dependencies from data used in the page (this is not easy)
• creating a temporary memory and filesystem cache to compare the contents of a source file against the last build
• add the ability to trigger a rebuild of only specific files

This will allow for truly incremental building, by allowing us to:

• track what the relationship between templates and data are
• trigger rebuilds of only the changed template, and the pages that that template is referenced by
• allow persisting this between dev and prod builds

[zachleat]

Uh, wow—this would be quite a lot of work and a HUGE pull request. This would need to be pared down into individual issues before we move forward!

[zachleat]

TemplateMap.js has some of this already in upcoming 0.7.2, but certainly not all of it.

[zachleat]

This is a duplicate of #108. We should coalesce over there!

[pbuzdin]

https://www.11ty.dev/docs/usage/incremental/