Make R Shiny app as a package fail to run

Question

I tried to make my R shiny app into a package. I created one package called rwdexpull following the package instructions from Hadley Wickham's book.

The app and one function to call the shiny app were created in the structure as suggested in make R shiny as a package. . Shiny app files were put under inst/pullapp while call function file was put in under R folder.

The package passed check. After finishing installation and restart R, however, the function return error say "... is not an exported object from 'namespace:rwdexpull'.

If I run the call function cohortpull in the console, the shiny app works. Any tips on how to solve this issue?

Thanks in advance!


#' Pull data from RWDEx data base
#'
#'
cohortpull <- function(){
  appDir <- system.file("pullapp", package = "rwdexpull")
  if (appDir == "") {
    stop("Could not find pullapp. Try re-installing `rwdexpull`.", call. = FALSE)
  }

  shiny::runApp(appDir, display.mode = "normal")
}

My session info: R version 4.0.3 (2020-10-10) Platform: x86_64-pc-linux-gnu (64-bit) Running under: CentOS Linux 7 (Core)

score 1 · Accepted Answer · answered Mar 01 '23 at 16:39

You have to export this function if you want to use it non-internally only. Since you use roxygen2, it suffices to add #' @export:

#' Pull data from RWDEx data base
#'
#' @export
cohortpull <- function(){
  appDir <- system.file("pullapp", package = "rwdexpull")
  if (appDir == "") {
    stop("Could not find pullapp. Try re-installing `rwdexpull`.", call. = FALSE)
  }

  shiny::runApp(appDir, display.mode = "normal")
}

Then, document and build.

Make R Shiny app as a package fail to run

1 Answers1