Create a function to detect missing alt-text in images

[ateucher]

It would be great to have some code to help us detect images in READMEs, vignettes, etc. that do not have alt-text. This would include R code chunks in quarto/R Markdown documents that generate images (e.g., plots), as well as images included via knitr::include_graphics) in a code chunk and in markdown via ![Alt](/path/to/img.jpg “image title”)

[jennybc]

Is usethis the obvious implementer of this? I'm wondering if something exists or should exist in, e.g., knitr / rmarkdown / quarto-r.

Then we would add a nudge to call this function, whoever owns it, in release and/or upkeep checklists.

[hadley]

Yeah, not clear that this code would naturally belong to usethis, but not clear where else it might belong.

We could also possibly implement this in pkgdown.

[jennybc]

This would be worth some attention on tidyverse dev day, regardless of where the function would eventually live.

[hadley]

pkgdown now reports on missing alt-text, so I think we can close this issue?