install_user_app() code

[chasemc]

Here is where it breaks:

`
my_package_name <- electricShine::install_user_app(library_path = library_path ,
repo_location = "local",
repo = local_package_path,
repos = cran_like_url,
package_install_opts = package_install_opts)
}

Transfer icons if present -----------------------------------------------

electron_build_resources <- system.file("extdata",
"icon",
package = my_package_name,
lib.loc = library_path)`

Because electricShine::install_user_app can only return a NULL as it just gives the result of readLines() on a newly created tempfile?

I'm happy to help make this thing a reality, but, the code in install_user_app is really confusing. Like, are all of the environment variables just being used to prevent you from having to pass variables between functions?

Originally posted by @BenWiseman in #368 (comment)

[chasemc]

Code needs better documentation.

The variables are the only way to make R install packages in the correct location