This is a nice little sandbox. A simple, almost minimalist set of source code to build an R package. I am adding new things when I discover they have different behavior during build, or because I think they are useful examples of R code. I make no effort to be comprehensive. However, the package should build and load in your system. If it does not, let me know.
Some additional details about testpkg
Examples of necessary or strongly suggested elements of an R package.
Examples of using roxygen2 source for building documentation
Examples of S4 methods and documentation.
Some additional things TBD.