gistfile1.r

#!/usr/bin/env Rscript

# Assume that the libraries are installed in "../vendor/r/"
# Adjust this path to the relative path between the script
# and the packrat directory

set_package_environment <- function(args){
  dir  <- dirname(sub("--file=", "", args[grep("--file", args)]))
  libs <- file.path(dir, "..", "vendor", "r", "packrat", "lib", "*", "*")
  .libPaths(c(.libPaths(), libs))
}

args <- commandArgs(trailingOnly = FALSE)
set_package_environment(args)

# Load an example package
library(tidyr)