Is it possible to load the theme file from a URL?

[VladimirAlexiev]

Description

We're building a library of revealjs presentations, and want all resource files to be shared globally on a server, rather than being copied to individual presentation folders. This works for all files except the theme css:

format:
  revealjs:
    theme: https://presentations.ontotext.com/resources/ontotext.scss

It interprets it as a local file (I am on Windows):

quarto render presentation.qmd --to revealjs
ERROR: The filename, directory name, or volume label syntax is incorrect. (os error 123), stat 'https:\presentations.ontotext.com\resources\ontotext.scss'

I also tried with resource-path:

format:
  revealjs:
    resource-path: [https://presentations.ontotext.com/resources/]
    theme: ontotext.scss

but it still doesn't work:

make
quarto render presentation.qmd --to revealjs
ERROR: NotFound: The system cannot find the file specified. (os error 2)
NotFound: The system cannot find the file specified. (os error 2)

[cderv]

No it is not possible to use a url for the theme file.

Currently, you would need a project script in your project to download such resources.
See more about that in https://quarto.org/docs/projects/scripts.html, especially pre-render step.

Other solution: you bundle you them file into an extension that you would be able to distribute over the web, and manage locally in your project with quarto add and quarto update
See more on how to create custom format: https://quarto.org/docs/extensions/formats.html
and distribute them https://quarto.org/docs/extensions/distributing.html

The extension mechanism is how Quarto some shared resources should be packaged and used over multiple project.

Hope this helps

[mcanouil]

FYI:

• Allow remote files to be included via include-before-* #6854

[cderv]

Interesting thanks for connecting !

Just clarifying for any readers, this is not a solution to this specific question as include-before- is a bit different. A .scss theme files needs to be processed as part of theme layering, so it can't be passed to include part.