haskell-lang

Haskell web site.

Editing pages

If you're just here to contribute a content change, read this section.

All pages that are produced by markdown are here. To contribute changes simply fork this repo and open a pull request. It will be merged and redeployed in short order.

If you want to edit a page which has some custom code in it, you'll want to see the next sections for building and running instructions. Maybe also take a look at architecture.

If you want to include Haskell code samples in markdown, use:

``` haskell
main = putStrLn "Hello, World!"
```

If you want to include Haskell code samples in Haskell code pages, use:

haskellPre "main = print 123"
haskellCode "peyton `simon` jones"

Pre for <pre> block, code for <code> span snippet.

Building

Clone the repo:

$ git clone git@github.com:haskell-infra/hl.git

You need one of these GHC versions:

GHC 7.6
GHC 7.8

Heads up: hsenv doesn't currently work on GHC 7.8. To get around this, you can instead try just making a cabal sandbox and using the hl-ghc7.8.cabal file to setup all direct and transient dependencies.

Create an hsenv (cabal sandbox doesn't support specifying a repo yet):

$ cd hl
$ hsenv
$ source .hsenv/bin/activate

You need the right package set. Add the following to your .hsenv/cabal/config, replacing the Hackage reference:

If you have GHC 7.6:

  remote-repo: stackage:http://www.stackage.org/stackage/1ba546f8f281c02d135ec3babd86516f726b4453

If you have GHC 7.8:

  remote-repo: stackage:http://www.stackage.org/stackage/160b97ce7459820d4de720d6a867b85297ab4351

Now just run:

$ git submodule init
$ sh scripts/pull-build

To do the cabal update, submodule, install, etc.

Done!

Running

It runs at: http://localhost:1990/

Manually running the binary:

$ dist/build/hl/hl

Running from inside GHCi:

> :l DevelMain
> DevelMain.update

Run this every time you want to update the web handler in-place, as in this demo.

If you use Emacs, you can just bind it to a key:

(define-key html-mode-map [f12] 'haskell-process-reload-devel-main)

Just hit f12 to recompile and restart.

Architecture

It uses Yesod and an MVC organization.

HL.M.* -- models
HL.V.* -- views
HL.C.* -- controllers

Templates are written in senza, a convenience wrapper to blaze-html. There is presently no database.

Style

We generally use this style for this project. You don't have to use this style, we can reformat patches as they come in.