I find myself doing something like this often: 1. Create a new project in RStudio (but forget to create it as an R package), 2. Wish that I could call `devtools::create()` or `devtools::setup()` to turn it into an R package. Two things to 'wish' for: 1. `devtools::create()` shouldn't fail for empty directories (or directories only a .Rproj file), 2. `devtools::setup()` shouldn't fail if a `.Rproj` file already exists.