R/rmd.R

In r-lib/urlchecker: Run CRAN URL Checks from Older R Versions

url_db_from_package_rmd_vignettes <- function(dir) {
  urls <- path <- character()
  rfiles <- Filter(file.exists, tools::pkgVignettes(dir = dir)$docs)
  for (rfile in rfiles) {
    if (!is.na(rfile) && nzchar(Sys.which("pandoc"))) {
      rpath <- asNamespace("tools")$.file_path_relative_to_dir(rfile, dir)
      tfile <- tempfile(fileext = ".html")
      on.exit(unlink(tfile), add = TRUE)
      out <- .pandoc_md_for_CRAN2(rfile, tfile)
      if (!out$status) {
        rurls <- tools$.get_urls_from_HTML_file(tfile)
        urls <- c(urls, rurls)
        path <- c(path, rep.int(rpath, length(rurls)))
      }
    }
  }
  tools$url_db(urls, path)
}

# adapted from https://github.com/wch/r-source/blob/58d223cf3eaa50ff8cfc2caf591d67350e549e4a/src/library/tools/R/utils.R#L1847-L1857
# Adding the autolink_bare_uris extension
.pandoc_md_for_CRAN2 <- function(ifile, ofile) {
  asNamespace("tools")$.system_with_capture(
    "pandoc",
    paste(
      shQuote(normalizePath(ifile)),
      "-s",
      "--mathjax",
      "--email-obfuscation=references",
      "-f",
      "markdown+autolink_bare_uris",
      "-o",
      shQuote(ofile)
    )
  )
}