在包中包括已归档的CRAN包

Question

I'm creating an R package, and I would like to rely on the falsy package, which has recently been archived from CRAN.

With a non-archived package, one would typically add the name of the package to the Imports list in the DESCRIPTION file. How does one import a package that's been archived by CRAN?

Note: After contacting Gábor it seems the reason falsy is archived is due to potentially dangerous inconsistencies between native and falsy notions of falsehood. He does not plan to unarchive the package.

Answer 1

This:

FALSY <- FALSE

TRUTHY <- TRUE

is_falsy <- function(object) {
  is.null(object) ||
    identical(object, FALSE) ||
    identical(object, 0L) ||
    identical(object, 0.0) ||
    identical(object, 0+0i) ||
    identical(object, "") ||
    identical(object, as.raw(0)) ||
    identical(object, logical()) ||
    identical(object, integer()) ||
    identical(object, double()) ||
    identical(object, complex()) ||
    identical(object, character()) ||
    identical(object, raw()) ||
    identical(object, list()) ||
    inherits(object, "try-error")
}

is_truthy <- function(object) {
  ! is_falsy(object)
}

`%&&%` <- function(lhs, rhs) {
  lres <- withVisible(eval(lhs, envir = parent.frame()))
  if (is_truthy(lres$value)) {
    eval(rhs, envir = parent.frame())
  } else {
    if (lres$visible) { lres$value } else { invisible(lres$value) }
  }
}

nay <- function(rhs) {
  if (is_falsy(rhs)) { TRUTHY } else { FALSY }
}

try_quietly <- function(expr) {
  try(expr, silent = TRUE)
}

is the entire extent (minus roxygen comments) of the package. Why not just include it in your package?

Failing that, possibly ask Gabor if he's planning re-releasing it to CRAN or if you could take over maintenance?