hakyll/examples/tagblog/hakyll.hs
2011-04-13 21:22:31 +02:00

99 lines
3.4 KiB
Haskell

{-# LANGUAGE OverloadedStrings #-}
module Main where
import Prelude hiding (id)
import Control.Arrow ((>>>), (***), arr)
import Control.Category (id)
import Data.Monoid (mempty, mconcat)
import Hakyll
main :: IO ()
main = hakyll $ do
-- Compress CSS
match "css/*" $ do
route idRoute
compile compressCssCompiler
-- Render posts
match "posts/*" $ do
route $ setExtension ".html"
compile $ pageCompiler
>>> arr (renderDateField "date" "%B %e, %Y" "Date unknown")
>>> renderTagsField "prettytags" (fromCapture "tags/*")
>>> applyTemplateCompiler "templates/post.html"
>>> applyTemplateCompiler "templates/default.html"
>>> relativizeUrlsCompiler
-- Render posts list
match "posts.html" $ route idRoute
create "posts.html" $ constA mempty
>>> arr (setField "title" "All posts")
>>> requireAllA "posts/*" addPostList
>>> applyTemplateCompiler "templates/posts.html"
>>> applyTemplateCompiler "templates/default.html"
>>> relativizeUrlsCompiler
-- Index
match "index.html" $ route idRoute
create "index.html" $ constA mempty
>>> arr (setField "title" "Home")
>>> requireA "tags" (setFieldA "tagcloud" (renderTagCloud'))
>>> requireAllA "posts/*" (id *** arr (take 3 . reverse . sortByBaseName) >>> addPostList)
>>> applyTemplateCompiler "templates/index.html"
>>> applyTemplateCompiler "templates/default.html"
>>> relativizeUrlsCompiler
-- Tags
create "tags" $
requireAll "posts/*" (\_ ps -> readTags ps :: Tags String)
-- Add a tag list compiler for every tag
match "tags/*" $ route $ setExtension ".html"
metaCompile $ require_ "tags"
>>> arr tagsMap
>>> arr (map (\(t, p) -> (tagIdentifier t, makeTagList t p)))
-- Render RSS feed
match "rss.xml" $ route idRoute
create "rss.xml" $
requireAll_ "posts/*"
>>> mapCompiler (arr $ copyBodyToField "description")
>>> renderRss feedConfiguration
-- Read templates
match "templates/*" $ compile templateCompiler
where
renderTagCloud' :: Compiler (Tags String) String
renderTagCloud' = renderTagCloud tagIdentifier 100 120
tagIdentifier :: String -> Identifier
tagIdentifier = fromCapture "tags/*"
-- | Auxiliary compiler: generate a post list from a list of given posts, and
-- add it to the current page under @$posts@
--
addPostList :: Compiler (Page String, [Page String]) (Page String)
addPostList = setFieldA "posts" $
arr (reverse . sortByBaseName)
>>> require "templates/postitem.html" (\p t -> map (applyTemplate t) p)
>>> arr mconcat
>>> arr pageBody
makeTagList :: String
-> [Page String]
-> Compiler () (Page String)
makeTagList tag posts =
constA (mempty, posts)
>>> addPostList
>>> arr (setField "title" ("Posts tagged ‘" ++ tag ++ "’"))
>>> applyTemplateCompiler "templates/posts.html"
>>> applyTemplateCompiler "templates/default.html"
feedConfiguration :: FeedConfiguration
feedConfiguration = FeedConfiguration
{ feedTitle = "SimpleBlog RSS feed."
, feedDescription = "A simple demo of an RSS feed created with Hakyll."
, feedAuthorName = "Jasper Van der Jeugt"
, feedRoot = "http://example.com"
}