ANN: hastache 0.6

Announcing: hastache 0.6

Hastache is a Haskell implementation of the mustache templating system.

Quick start

cabal update
cabal install hastache

A simple example:

import Text.Hastache 
import Text.Hastache.Context 
import qualified Data.Text.Lazy.IO as TL

main = hastacheStr defaultConfig (encodeStr template) (mkStrContext context)
    >>= TL.putStrLn

template = "Hello, {{name}}!\n\nYou have {{unread}} unread messages." 

context "name" = MuVariable "Haskell"
context "unread" = MuVariable (100 :: Int)

Read Mustache documentation for template syntax; consult README for more details.

Whats’s new in 0.6?

The interface of the library has been switched from ByteString to (lazy) Text. That means, for example, that the type of hastcheStr function is now the following:

hastacheStr
:: MonadIO m => MuConfig m	-> Text	-> MuContext m -> m Text

The generic context generation (mkGenericContext) now supports functions of the types Text -> Text and Text -> m Text, as well as types with multiple constructors. That is, given a Haskell datastructure

data A = A { str :: String }
       | B { num :: Int }

it is possible to write a template like this:

{{#A}}
A : {{str}}
{{/A}}
{{#B}}
B : {{num}}
{{/B}}

Please take a look at the multiple constructors example if you are interested.

Additionally, a couple of new MuVar instances has been added.

Acknowledgments

Special thanks to Mark Lentczner, Alexander Voikov and others who reported issues, tested the library and provided feedback.