R/aaa.r

In ewenme/ewenthemes: Beautiful Themes and Theme Components for 'ggplot2'

try_require <- function(package, fun) {
  if (requireNamespace(package, quietly = TRUE)) {
    library(package, character.only = TRUE)
    return(invisible())
  }

  stop("Package `", package, "` required for `", fun , "`.\n", # nocov start
    "Please install and try again.", call. = FALSE) # nocov end
}