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|
module Hakyll.Preview.Poll
( watchUpdates
) where
--------------------------------------------------------------------------------
import Filesystem.Path.CurrentOS (decodeString, encodeString)
import System.Directory (getCurrentDirectory)
import System.FilePath (makeRelative)
import System.FSNotify (startManagerConf, watchTree,
Event(..), WatchConfig(..))
--------------------------------------------------------------------------------
import Hakyll.Core.Configuration
--------------------------------------------------------------------------------
-- | A thread that watches for updates in a 'providerDirectory' and recompiles
-- a site as soon as any changes occur
watchUpdates :: Configuration -> IO () -> IO ()
watchUpdates conf update = do
_ <- update
manager <- startManagerConf (Debounce 0.1)
workingDirectory <- getCurrentDirectory
watchTree manager path (predicate workingDirectory) $ const update
where
path = decodeString $ providerDirectory conf
predicate wDir evt
| isRemove evt = False
| otherwise = not $ shouldIgnoreFile conf (relativeEventPath wDir evt)
relativeEventPath :: FilePath -> Event -> FilePath
relativeEventPath b evt = makeRelative b $ encodeString $ evtPath evt
where
evtPath (Added p _) = p
evtPath (Modified p _) = p
evtPath (Removed p _) = p
isRemove :: Event -> Bool
isRemove (Removed _ _) = True
isRemove _ = False
|
