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|
-- | This is the module which binds it all together
--
{-# LANGUAGE GeneralizedNewtypeDeriving, OverloadedStrings #-}
module Hakyll.Core.Run
( run
) where
import Prelude hiding (reverse)
import Control.Monad (filterM, forM_)
import Control.Monad.Trans (liftIO)
import Control.Applicative (Applicative, (<$>))
import Control.Monad.Reader (ReaderT, runReaderT, ask)
import Control.Monad.State.Strict (StateT, runStateT, get, put)
import Data.Map (Map)
import qualified Data.Map as M
import Data.Monoid (mempty, mappend)
import System.FilePath ((</>))
import qualified Data.Set as S
import Hakyll.Core.Routes
import Hakyll.Core.Identifier
import Hakyll.Core.Util.File
import Hakyll.Core.Compiler
import Hakyll.Core.Compiler.Internal
import Hakyll.Core.Resource
import Hakyll.Core.Resource.Provider
import Hakyll.Core.Resource.Provider.File
import Hakyll.Core.Rules.Internal
import Hakyll.Core.DirectedGraph
import Hakyll.Core.DependencyAnalyzer
import Hakyll.Core.Writable
import Hakyll.Core.Store
import Hakyll.Core.Configuration
import Hakyll.Core.Logger
-- | Run all rules needed, return the rule set used
--
run :: HakyllConfiguration -> Rules -> IO RuleSet
run configuration rules = do
logger <- makeLogger
section logger "Initialising"
store <- timed logger "Creating store" $
makeStore $ storeDirectory configuration
provider <- timed logger "Creating provider" $
fileResourceProvider configuration
-- Fetch the old graph from the store. If we don't find it, we consider this
-- to be the first run
graph <- storeGet store "Hakyll.Core.Run.run" "dependencies"
let (firstRun, oldGraph) = case graph of Found g -> (False, g)
_ -> (True, mempty)
let ruleSet = runRules rules provider
compilers = rulesCompilers ruleSet
-- Extract the reader/state
reader = unRuntime $ addNewCompilers compilers
stateT = runReaderT reader $ RuntimeEnvironment
{ hakyllLogger = logger
, hakyllConfiguration = configuration
, hakyllRoutes = rulesRoutes ruleSet
, hakyllResourceProvider = provider
, hakyllStore = store
, hakyllFirstRun = firstRun
}
-- Run the program and fetch the resulting state
((), state') <- runStateT stateT $ RuntimeState
{ hakyllAnalyzer = makeDependencyAnalyzer mempty (const False) oldGraph
, hakyllCompilers = M.empty
}
-- We want to save the final dependency graph for the next run
storeSet store "Hakyll.Core.Run.run" "dependencies" $
analyzerGraph $ hakyllAnalyzer state'
-- Flush and return
flushLogger logger
return ruleSet
data RuntimeEnvironment = RuntimeEnvironment
{ hakyllLogger :: Logger
, hakyllConfiguration :: HakyllConfiguration
, hakyllRoutes :: Routes
, hakyllResourceProvider :: ResourceProvider
, hakyllStore :: Store
, hakyllFirstRun :: Bool
}
data RuntimeState = RuntimeState
{ hakyllAnalyzer :: DependencyAnalyzer Identifier
, hakyllCompilers :: Map Identifier (Compiler () CompileRule)
}
newtype Runtime a = Runtime
{ unRuntime :: ReaderT RuntimeEnvironment (StateT RuntimeState IO) a
} deriving (Functor, Applicative, Monad)
-- | Add a number of compilers and continue using these compilers
--
addNewCompilers :: [(Identifier, Compiler () CompileRule)]
-- ^ Compilers to add
-> Runtime ()
addNewCompilers newCompilers = Runtime $ do
-- Get some information
logger <- hakyllLogger <$> ask
section logger "Adding new compilers"
provider <- hakyllResourceProvider <$> ask
store <- hakyllStore <$> ask
firstRun <- hakyllFirstRun <$> ask
-- Old state information
oldCompilers <- hakyllCompilers <$> get
oldAnalyzer <- hakyllAnalyzer <$> get
let -- All known compilers
universe = M.keys oldCompilers ++ map fst newCompilers
-- Create a new partial dependency graph
dependencies = flip map newCompilers $ \(id', compiler) ->
let deps = runCompilerDependencies compiler id' universe
in (id', deps)
-- Create the dependency graph
newGraph = fromList dependencies
-- Check which items have been modified
modified <- fmap S.fromList $ flip filterM (map fst newCompilers) $
liftIO . resourceModified provider store . fromIdentifier
let checkModified = if firstRun then const True else (`S.member` modified)
-- Create a new analyzer and append it to the currect one
let newAnalyzer = makeDependencyAnalyzer newGraph checkModified $
analyzerPreviousGraph oldAnalyzer
analyzer = mappend oldAnalyzer newAnalyzer
-- Update the state
put $ RuntimeState
{ hakyllAnalyzer = analyzer
, hakyllCompilers = M.union oldCompilers (M.fromList newCompilers)
}
-- Continue
unRuntime stepAnalyzer
stepAnalyzer :: Runtime ()
stepAnalyzer = Runtime $ do
-- Step the analyzer
state <- get
let (signal, analyzer') = step $ hakyllAnalyzer state
put $ state { hakyllAnalyzer = analyzer' }
case signal of Done -> return ()
Cycle c -> unRuntime $ dumpCycle c
Build id' -> unRuntime $ build id'
-- | Dump cyclic error and quit
--
dumpCycle :: [Identifier] -> Runtime ()
dumpCycle cycle' = Runtime $ do
logger <- hakyllLogger <$> ask
section logger "Dependency cycle detected! Conflict:"
forM_ (zip cycle' $ drop 1 cycle') $ \(x, y) ->
report logger $ show x ++ " -> " ++ show y
build :: Identifier -> Runtime ()
build id' = Runtime $ do
logger <- hakyllLogger <$> ask
routes <- hakyllRoutes <$> ask
provider <- hakyllResourceProvider <$> ask
store <- hakyllStore <$> ask
compilers <- hakyllCompilers <$> get
section logger $ "Compiling " ++ show id'
-- Fetch the right compiler from the map
let compiler = compilers M.! id'
-- Check if the resource was modified
isModified <- liftIO $ resourceModified provider store $ fromIdentifier id'
-- Run the compiler
result <- timed logger "Total compile time" $ liftIO $
runCompiler compiler id' provider (M.keys compilers) routes
store isModified logger
case result of
-- Compile rule for one item, easy stuff
Right (CompileRule compiled) -> do
case runRoutes routes id' of
Nothing -> return ()
Just url -> timed logger ("Routing to " ++ url) $ do
destination <-
destinationDirectory . hakyllConfiguration <$> ask
let path = destination </> url
liftIO $ makeDirectories path
liftIO $ write path compiled
-- Continue for the remaining compilers
unRuntime stepAnalyzer
-- Metacompiler, slightly more complicated
Right (MetaCompileRule newCompilers) ->
-- Actually I was just kidding, it's not hard at all
unRuntime $ addNewCompilers newCompilers
-- Some error happened, log and continue
Left err -> do
thrown logger err
unRuntime stepAnalyzer
|
