CodeBlock: (block) ->
  fname = os.tmpname!
  with io.open fname, "w"
    \write block.text
    \close!

  cmd = "pygmentize -f html -O style=dracula,wrapcode,classprefix=py- -l %s %s"

  if block.classes[1] == "moon" or block.classes[1] == "moonscript"
    p = io.popen (cmd .. " -x")\format "moonscript.py", fname
    out = p\read"*a"
    p\close!
    pandoc.RawBlock "html", out
  else
    if block.classes[1] == nil or block.classes[1] == "heex"
      if block.classes[1] == nil
        cb = pandoc.CodeBlock(block.text, class: "sourceCode")
        pandoc.Div cb, class: "sourceCode"
      else
        block
    else
      status, handle_or_error = pcall ->
        io.popen (cmd)\format block.classes[1], fname

      sout = handle_or_error\read"*a"
      if sout\len! == 0
        cb = pandoc.CodeBlock(block.text, class: "sourceCode")
        pandoc.Div cb, class: "sourceCode"
      else
        pandoc.RawBlock "html", sout