Friday, January 4, 2008

Emacs Tip #8 : markdown

I saw a post for auto-generating HTML and thought, neat trick. My preferred email client is Gnus, which already mimics that (changing *text* into text and so forth).

But how cool would it be to have both my regular text show up, as well as an HTML version (when useful) - I already write using the syntax of markdown.

Mr. O'Connor happened to choose to do integration using Python (preferred programming language). Of course I don't grok Python, so getting it to work isn't quite as easy as running the Perl version.

So I coded up similar functionality, only I also tweaked things such that only the text before the signature line is converted into HTML.

(defun mimedown ()
(let* ((sig-point (save-excursion (message-goto-signature) (forward-line -1) (point)))
(orig-txt (buffer-substring-no-properties (point) sig-point)))
(shell-command-on-region (point) sig-point "" nil t)
(insert "<#multipart type=alternative>\n")
(insert orig-txt)
(insert "<#part type=text/html>\n< html>\n< head>\n< title> HTML version of email</title>\n</head>\n< body>")
(insert "\n</body>\n</html>\n<#/multipart>\n"))))


Edwin said...

The code sample is not complete in the view on my browser (Firefox). Why don't you post it to They have markdown mode page at


Unknown said...

Actually, the code is complete - blogger just isn't displaying it properly. If you select the code and paste it into Emacs, it'll show up just fine.

I'm not sure what I want to do about showing code in blogger because it doesn't format well. I have toyed with the idea of putting it on

Thanks for the feedback.

Unknown said...

I just updated the template blogger uses for this blog, which doesn't restrict the main portion to be a fixed width. This seems to help with the code display.