R function to detect output format

[vincentarelbundock]

Hi,

Is there an R function I can call in a Quarto code chunk to detect the output format of the notebook? In Rmarkdown, I might do something like:

rmarkdown::default_output_format(knitr::current_input())$name

Use-case: my modelsummary package draws regression tables, and it must know the target output format in order to create appropriate HTML, LaTeX, or other output. In Rmarkdown, I can dynamically make this adjustment by calling the code above under the hood, and adapting the behavior of modelsummary on the fly. Unfortunately, I was unable to find a similar function in Quarto.

Did I miss something? If not, do you think that this feature could be implemented?

Thanks a lot for your work on this great project!

[mcanouil]

First of, knitr offers knitr::is_latex_output() and knitr::is_html_output().

And since Quarto is using knitr, then you can use also use those to check if the format is an HTML or LaTeX based format.

[vincentarelbundock]

Thanks, that's useful. But is there a more general solution to also detect markdown, word, and other output formats?

[mcanouil]

Again, since Quarto is using knitr, if you want the output format passed to Pandoc, then knitr::pandoc_to().

You can also have access to all YAML metadata using rmarkdown::metadata list, e.g., rmarkdown::metadata[["format"]].

[vincentarelbundock]

Yep, that should work. Thanks a lot @mcanouil

[mcanouil]

You're welcome.
There are a lot more "hidden" functions in knitr 😉