Is is possible to find out what R packages are not being used in R shiny app?

[sten]

I am working on a legacy shiny app passed on. I see the list of the packages mentioned and seems to be a long list. Is it possible to figure out which of the packages are not being used so that we don't have to load unnecessary packages?

[cderv]

You could be interested in this dev :

GitHub - r-lib/itdepends

itdepends provides tools to assess usage, measure weights, visualize proportions and assist removal of dependencies.

See rstudio conf

Posit

[hoelk]

I'm on mobile but here are a few pointers : you could crawl all the exported functions of the packages (there are some functions in devtools for parsing namespace files) and then search your code for every function.

here is a function that gets exported functions of a package I wrote a while ago https://github.com/s-fleck/testthis/blob/master/R/Test_coverage.R (get _pkg_functions)

searching the source code should be easy (list.files, readLines, grep). if you need some pointers here, look through the source of my (experimental) github package sifr

[sten]

Thank you @hoelk . Will go through the package.