use withr::local_envvir to set environment variables in a package

[mccroweyclinton-EPA]

I am trying to utilize the withr package to incorporate it's features in my package. I am trying to use withr::local_envvar to set an environment variable in my package so that when the package is unloaded, the environment variable is also unset. I can not figure out how to do this from the withr's documentation.

It seems that this psuedocode should work

<new_item>  <- <something>
withr::local_envvar(new = c(<new_environment_variable> = <new_item>), action = "replace"))

I think that I should be passing in something for the .local_envir parameter but I am not sure what I should send if I want the variable to unset when the package is unloaded.

[Gabor]

withr does not do this. It unsets environment variables (and other things) when functions exit.

To set an env var when a package is loaded, use the .onLoad() function, and for unsetting when the package is unloaded, use .onUnload(). See their documentation for the details.

[mccroweyclinton-EPA]

Thank you for clearing up my misinterpretation of how this package works.