Merge branch 'move-data' of https://github.com/fmichonneau/styles into fmichonneau-move-data

generate_md_episodes <- function() {

    if (require("knitr")) {

        if (packageVersion("knitr") < '1.9.19') {

            stop("knitr must be version 1.9.20 or higher")

    if (!require("stringr"))

        stop("The package stringr is required for generating the lessons.")

    ## find all the Rmd files, and generates the paths for their respective outputs

    src_rmd <- list.files(pattern = "??-*.Rmd$", path = "_episodes_rmd", full.names = TRUE)

    dest_md <- file.path("_episodes", gsub("Rmd$", "md", basename(src_rmd)))

    ## knit the Rmd into markdown

    mapply(function(x, y) {

        knitr::knit(x, output = y)

    }, src_rmd, dest_md)

}

generate_md_episodes()