After some real simple modification to the markdown+geshi patch referenced in my previous blog post I now have literate haskell support! The modification literally took less time than writing this post Find my new patch attached at the bottom of the page.

So – the testing! (This should render as normal text.)

> and "this" {-should-} -- be rendered as haskell

Now some normal text in between the haskell blocks, before we give haskell highlighting a run for its money.

> and . more . haskell $ [1,2,3]
> main = print.take`id`20$fix$(.)<$>(:)<*>((.((:[]).))(=<<).(*).(*2))$1 -- print an interesting sequence

End of test.

Anyway, here’s the patch for markdown.php (you’ll also need to cut-n-paste the highlight_helper.php file from Dougal Stanton’s blog).

The whole WordPress installation took perhaps 10-15 minutes, and that’s including setting up the database, running the setup wizard, adding a new non-admin account in wordpress and installing markdown, wp-syntax and the Syntax Highlighting with Markdown in WordPress changes as recommended by conal.

And here’s some haskell code!

-- Test some haskell code
 
fib = 1:1:zipWith (+) fib (tail fib)

And now back in the blog text!

-- And a final line of haskell
main = mapM_ print . take 20 $ fib

I guess this pretty much proves that WordPress is easier to use and more mature than blosxom. This may well become my long-in-planning programming and haskell blog!

There’s a little bit of a problem though. The second run of code lines above becomes highlighted as plain text – this is because the first code block is marked {{lang:haskell}} while the second one isn’t. What I’d like here is for them to keep the same language as the previous code block, which would be nice for any literal-haskell-ish blog posts I might post later on. And I really don’t want to have to write {{lang:haskell}} every other line of blog post. I could of course let haskell be the default rather than text, but what if I want to blog about some other language? Hmm… Let’s see if I get around to hacking markdown/highlighting any time soon.