create_compendium("pkgname") doesn't check whether "pkgname" already exists

[soniamitchell]

Describe the bug
The function create_compendium("pkgname") doesn't check whether "pkgname" already exists. If pkgname is a folder, the package is merged with an existing folder. If pkgname is a file, an error occurs.

To Reproduce

1. In terminal, create file '~/Desktop/pkgname'

> create_compendium('pkgname')
Error in writeLines(c("cat(crayon::bold('\nThis project was set up by rrtools.\n'))",  : 
  cannot open the connection
In addition: Warning messages:
1: In dir.create(path) : 'pkgname' already exists
2: In writeLines(c("cat(crayon::bold('\nThis project was set up by rrtools.\n'))",  :
  cannot open file 'pkgname/.Rprofile': Not a directory
>

Expected behavior
Check whether 'pkgname' already exists and if it does, stop.

[benmarwick]

Thanks, that does seem like something we could handle more gracefully. Do you have something in mind for a fix? Is there another package that does this very well which we can look at for inspiration?

[soniamitchell]

Maybe something like this:

if (!dir.exists(path)){
dir.create(path)
} else {
    print("Directory already exists!")
}

at line 89 in core_use_compendium.R ?

[benmarwick]

Thank you, would you like to make a pull request (with a test) to add this?