diff options
Diffstat (limited to 'src/Hakyll/Core/Rules.hs')
| -rw-r--r-- | src/Hakyll/Core/Rules.hs | 53 |
1 files changed, 36 insertions, 17 deletions
diff --git a/src/Hakyll/Core/Rules.hs b/src/Hakyll/Core/Rules.hs index eba3fb9..892cf7c 100644 --- a/src/Hakyll/Core/Rules.hs +++ b/src/Hakyll/Core/Rules.hs @@ -7,13 +7,18 @@ -- A typical usage example would be: -- -- > main = hakyll $ do --- > route "posts/*" (setExtension "html") --- > compile "posts/*" someCompiler +-- > match "posts/*" $ do +-- > route (setExtension "html") +-- > compile someCompiler +-- > match "css/*" $ do +-- > route idRoute +-- > compile compressCssCompiler -- {-# LANGUAGE GeneralizedNewtypeDeriving, OverloadedStrings #-} module Hakyll.Core.Rules ( RulesM , Rules + , match , compile , create , route @@ -23,16 +28,17 @@ module Hakyll.Core.Rules import Control.Applicative ((<$>)) import Control.Monad.Writer (tell) -import Control.Monad.Reader (ask) +import Control.Monad.Reader (ask, local) import Control.Arrow (second, (>>>), arr, (>>^)) import Control.Monad.State (get, put) -import Data.Monoid (mempty) +import Data.Monoid (mempty, mappend) import qualified Data.Set as S import Data.Typeable (Typeable) import Data.Binary (Binary) -import Hakyll.Core.ResourceProvider +import Hakyll.Core.Resource +import Hakyll.Core.Resource.Provider import Hakyll.Core.Identifier import Hakyll.Core.Identifier.Pattern import Hakyll.Core.Compiler.Internal @@ -63,21 +69,32 @@ tellResources :: [Resource] -> Rules tellResources resources = RulesM $ tell $ RuleSet mempty mempty $ S.fromList resources +-- | Only compile/route items satisfying the given predicate +-- +match :: Pattern -> Rules -> Rules +match pattern = RulesM . local addPredicate . unRulesM + where + addPredicate env = env + { rulesPattern = rulesPattern env `mappend` pattern + } + -- | Add a compilation rule to the rules. -- --- This instructs all resources matching the given pattern to be compiled using --- the given compiler. When no resources match the given pattern, nothing will --- happen. In this case, you might want to have a look at 'create'. +-- This instructs all resources to be compiled using the given compiler. When +-- no resources match the current selection, nothing will happen. In this case, +-- you might want to have a look at 'create'. -- compile :: (Binary a, Typeable a, Writable a) - => Pattern -> Compiler Resource a -> Rules -compile pattern compiler = RulesM $ do - identifiers <- matches pattern . map unResource . resourceList <$> ask + => Compiler Resource a -> Rules +compile compiler = RulesM $ do + pattern <- rulesPattern <$> ask + provider <- rulesResourceProvider <$> ask + let ids = filterMatches pattern $ map unResource $ resourceList provider unRulesM $ do - tellCompilers $ flip map identifiers $ \identifier -> + tellCompilers $ flip map ids $ \identifier -> (identifier, constA (Resource identifier) >>> compiler) - tellResources $ map Resource identifiers - + tellResources $ map Resource ids + -- | Add a compilation rule -- -- This sets a compiler for the given identifier. No resource is needed, since @@ -91,10 +108,12 @@ create identifier compiler = tellCompilers [(identifier, compiler)] -- | Add a route. -- --- This adds a route for all items matching the given pattern. +-- This adds a route for all items matching the current pattern. -- -route :: Pattern -> Routes -> Rules -route pattern route' = tellRoute $ ifMatch pattern route' +route :: Routes -> Rules +route route' = RulesM $ do + pattern <- rulesPattern <$> ask + unRulesM $ tellRoute $ matchRoute pattern route' -- | Apart from regular compilers, one is also able to specify metacompilers. -- Metacompilers are a special class of compilers: they are compilers which |