R/zzz.R

In hrbrmstr/roto.s3: Access and Orchestrate Amazon Simple Storage Service

py_c <- reticulate::py_config()

boto3 <- NULL
os <- NULL

.onLoad <- function(libname, pkgname) {

  if (utils::compareVersion(py_c$version, "3.5") < 0) {
    stop(
      paste0(
        c(
          "Python 3.5+ is required. If this is installed please set RETICULATE_PYTHON ",
          "to the path to the Python 3 binary on your system and try re-installing/",
          "re-loading the package."
        ),
        collapse = ""
      )
    )
    return()
  }

  if (!reticulate::py_module_available("boto3")) {
    packageStartupMessage(
      "The 'boto3' Python module must be installed."
    )
  } else {
    os <<- reticulate::import("os", delay_load = TRUE)
    boto3 <<- reticulate::import("boto3", delay_load = TRUE)
  }

}