Run R code from URL (e.g. Github)

source_https.R

# https://tonybreyal.wordpress.com/2011/11/24/source_https-sourcing-an-r-script-from-github/

source_https <- function(url, ...) {
  # load package
  require(RCurl)
  
  # parse and evaluate each .R script
  sapply(c(url, ...), function(u) {
    eval(parse(text = getURL(u, followlocation = TRUE, cainfo = system.file("CurlSSL", "cacert.pem", package = "RCurl"))), envir = .GlobalEnv)
  })
}