Import nbrOfWorkers() from {future} into NAMESPACE

[jdblischak]

While evaluating #251 and #252, I discovered that the function nbrOfWorkers() is missing from the package NAMESPACE. Below is a minimal reprex to demonstrate the problem:

library("simtrial")
packageVersion("simtrial")
## [1] ‘0.4.1.4’
future::plan("multisession", workers = 2)
sim_fixed_n(n_sim = 10)
## Error in nbrOfWorkers() : could not find function "nbrOfWorkers"

This NAMESPACE problem was missed by R CMD check because I wrongly added "nbrOfWorkers" to utils::globalVariables() in #114, assuming it was a variable defined in this package.

simtrial/R/global.R

Line 46 in 75297a1

"nbrOfWorkers",

After removing it from utils::globalVariables(), R CMD check properly identifies the problem:

N  checking R code for possible problems (6.5s)
   sim_fixed_n: no visible global function definition for 'nbrOfWorkers'
   sim_gs_n: no visible global function definition for 'nbrOfWorkers'
   Undefined global functions or variables:
     nbrOfWorkers

And after importing nbrOfWorkers() into the package namespace, the example above now works:

# after
library("simtrial")
packageVersion("simtrial")
## [1] ‘0.4.1.5’
future::plan("multisession", workers = 2)
sim_fixed_n(n_sim = 10)
# works

xref: #110, #249

[cmansch]

Good catch.