how to downscale, compress non-knitr images about blogdown HOT 4 CLOSED

This is pretty cool. I personally use a imageoptim git hook that compresses all *.png and *.jpg how I want upon checking into source control.

from blogdown.

I prefer not to solve this specific issue, but provide a completely general solution instead: blogdown will execute the script R/build.Rif it exists. You can do whatever you want in this script.

from blogdown.

Thanks for sharing! I guess this, along with other related issues you posted to knitr and bookdown, will remain fairly low priority for at least a few months.

Anyway, if I were to crack this problem, I'd just use a shell script that calls convert (ImageMagick) or the R package magick to process images.

from blogdown.

thanks for the pointer @yihui – I moved over to magick, and the whole process is now a lot faster (updated above).
(The script now also avoids re-compressing already compressed images, though the solution is quite clumsy).

Not sure how I missed that fantastic package in the first place.
I'm still a little scared of the shell, so I'm sticking to R for now.
Understood that this is going to take a while (if ever) before this makes it to knitr()and/or blogdown(), just wanted to share my hack-job in case someone else might be interested in a quick fix.

from blogdown.