Merge pull request #200 from mawds/commentgenerated

        knitr::knit(x, output = y)

    }, src_rmd, dest_md)

    # Read the generated md files and add comments advising not to edit them

    vapply(dest_md, function(y) {

      con <- file(y)

      mdfile <- readLines(con)

      if (mdfile[1] != "---")

        stop("Input file does not have a valid header")

      mdfile <- append(mdfile, "# Please do not edit this file directly; it is auto generated.", after = 1)

      mdfile <- append(mdfile, paste("# Instead, please edit", 

                                     basename(y), "in _episodes_rmd/"), after = 2)

      writeLines(mdfile, con)

      close(con)

      return(paste("Warning added to YAML header of", y))

    },

    character(1))

}

generate_md_episodes()