diff options
Diffstat (limited to 'src/Hakyll/Core/Compiler/Internal.hs')
| -rw-r--r-- | src/Hakyll/Core/Compiler/Internal.hs | 42 |
1 files changed, 27 insertions, 15 deletions
diff --git a/src/Hakyll/Core/Compiler/Internal.hs b/src/Hakyll/Core/Compiler/Internal.hs index 8424d69..ed7880f 100644 --- a/src/Hakyll/Core/Compiler/Internal.hs +++ b/src/Hakyll/Core/Compiler/Internal.hs @@ -6,7 +6,8 @@ {-# LANGUAGE MultiParamTypeClasses #-} module Hakyll.Core.Compiler.Internal ( -- * Types - CompilerRead (..) + Snapshot + , CompilerRead (..) , CompilerWrite (..) , CompilerResult (..) , Compiler (..) @@ -51,6 +52,12 @@ import Hakyll.Core.Store -------------------------------------------------------------------------------- +-- | Whilst compiling an item, it possible to save multiple snapshots of it, and +-- not just the final result. +type Snapshot = String + + +-------------------------------------------------------------------------------- -- | Environment in which a compiler runs data CompilerRead = CompilerRead { -- | Main configuration @@ -86,9 +93,10 @@ instance Monoid CompilerWrite where -------------------------------------------------------------------------------- data CompilerResult a where - CompilerDone :: a -> CompilerWrite -> CompilerResult a - CompilerError :: [String] -> CompilerResult a - CompilerRequire :: Identifier -> Compiler a -> CompilerResult a + CompilerDone :: a -> CompilerWrite -> CompilerResult a + CompilerSnapshot :: Snapshot -> Compiler a -> CompilerResult a + CompilerError :: [String] -> CompilerResult a + CompilerRequire :: (Identifier, Snapshot) -> Compiler a -> CompilerResult a -------------------------------------------------------------------------------- @@ -104,9 +112,10 @@ instance Functor Compiler where fmap f (Compiler c) = Compiler $ \r -> do res <- c r return $ case res of - CompilerDone x w -> CompilerDone (f x) w - CompilerError e -> CompilerError e - CompilerRequire i c' -> CompilerRequire i (fmap f c') + CompilerDone x w -> CompilerDone (f x) w + CompilerSnapshot s c' -> CompilerSnapshot s (fmap f c') + CompilerError e -> CompilerError e + CompilerRequire i c' -> CompilerRequire i (fmap f c') {-# INLINE fmap #-} @@ -121,14 +130,16 @@ instance Monad Compiler where CompilerDone x w -> do res' <- unCompiler (f x) r return $ case res' of - CompilerDone y w' -> CompilerDone y (w `mappend` w') - CompilerError e -> CompilerError e - CompilerRequire i c' -> CompilerRequire i $ do + CompilerDone y w' -> CompilerDone y (w `mappend` w') + CompilerSnapshot s c' -> CompilerSnapshot s c' + CompilerError e -> CompilerError e + CompilerRequire i c' -> CompilerRequire i $ do compilerTell w -- Save dependencies! c' - CompilerError e -> return $ CompilerError e - CompilerRequire i c' -> return $ CompilerRequire i $ c' >>= f + CompilerSnapshot s c' -> return $ CompilerSnapshot s (c' >>= f) + CompilerError e -> return $ CompilerError e + CompilerRequire i c' -> return $ CompilerRequire i (c' >>= f) {-# INLINE (>>=) #-} fail = compilerThrow . return @@ -198,9 +209,10 @@ compilerCatch :: Compiler a -> ([String] -> Compiler a) -> Compiler a compilerCatch (Compiler x) f = Compiler $ \r -> do res <- x r case res of - CompilerDone res' w -> return (CompilerDone res' w) - CompilerError e -> unCompiler (f e) r - CompilerRequire i c -> return (CompilerRequire i (compilerCatch c f)) + CompilerDone res' w -> return (CompilerDone res' w) + CompilerSnapshot s c -> return (CompilerSnapshot s (compilerCatch c f)) + CompilerError e -> unCompiler (f e) r + CompilerRequire i c -> return (CompilerRequire i (compilerCatch c f)) {-# INLINE compilerCatch #-} |