{-# LANGUAGE GeneralizedNewtypeDeriving, ScopedTypeVariables, BangPatterns #-}
module Distribution.Client.RebuildMonad (
Rebuild,
runRebuild,
execRebuild,
askRoot,
monitorFiles,
MonitorFilePath,
monitorFile,
monitorFileHashed,
monitorNonExistentFile,
monitorDirectory,
monitorNonExistentDirectory,
monitorDirectoryExistence,
monitorFileOrDirectory,
monitorFileSearchPath,
monitorFileHashedSearchPath,
monitorFileGlob,
monitorFileGlobExistence,
FilePathGlob(..),
FilePathRoot(..),
FilePathGlobRel(..),
GlobPiece(..),
FileMonitor(..),
newFileMonitor,
rerunIfChanged,
delayInitSharedResource,
delayInitSharedResources,
matchFileGlob,
getDirectoryContentsMonitored,
createDirectoryMonitored,
monitorDirectoryStatus,
doesFileExistMonitored,
need,
needIfExists,
findFileWithExtensionMonitored,
findFirstFileMonitored,
findFileMonitored,
) where
import Prelude ()
import Distribution.Client.Compat.Prelude
import Distribution.Client.FileMonitor
import Distribution.Client.Glob hiding (matchFileGlob)
import qualified Distribution.Client.Glob as Glob (matchFileGlob)
import Distribution.Simple.Utils (debug)
import qualified Data.Map.Strict as Map
import Control.Monad.State as State
import Control.Monad.Reader as Reader
import Control.Concurrent.MVar (MVar, newMVar, modifyMVar)
import System.FilePath
import System.Directory
newtype Rebuild a = Rebuild (ReaderT FilePath (StateT [MonitorFilePath] IO) a)
deriving (a -> Rebuild b -> Rebuild a
(a -> b) -> Rebuild a -> Rebuild b
(forall a b. (a -> b) -> Rebuild a -> Rebuild b)
-> (forall a b. a -> Rebuild b -> Rebuild a) -> Functor Rebuild
forall a b. a -> Rebuild b -> Rebuild a
forall a b. (a -> b) -> Rebuild a -> Rebuild b
forall (f :: * -> *).
(forall a b. (a -> b) -> f a -> f b)
-> (forall a b. a -> f b -> f a) -> Functor f
<$ :: a -> Rebuild b -> Rebuild a
$c<$ :: forall a b. a -> Rebuild b -> Rebuild a
fmap :: (a -> b) -> Rebuild a -> Rebuild b
$cfmap :: forall a b. (a -> b) -> Rebuild a -> Rebuild b
Functor, Functor Rebuild
a -> Rebuild a
Functor Rebuild
-> (forall a. a -> Rebuild a)
-> (forall a b. Rebuild (a -> b) -> Rebuild a -> Rebuild b)
-> (forall a b c.
(a -> b -> c) -> Rebuild a -> Rebuild b -> Rebuild c)
-> (forall a b. Rebuild a -> Rebuild b -> Rebuild b)
-> (forall a b. Rebuild a -> Rebuild b -> Rebuild a)
-> Applicative Rebuild
Rebuild a -> Rebuild b -> Rebuild b
Rebuild a -> Rebuild b -> Rebuild a
Rebuild (a -> b) -> Rebuild a -> Rebuild b
(a -> b -> c) -> Rebuild a -> Rebuild b -> Rebuild c
forall a. a -> Rebuild a
forall a b. Rebuild a -> Rebuild b -> Rebuild a
forall a b. Rebuild a -> Rebuild b -> Rebuild b
forall a b. Rebuild (a -> b) -> Rebuild a -> Rebuild b
forall a b c. (a -> b -> c) -> Rebuild a -> Rebuild b -> Rebuild c
forall (f :: * -> *).
Functor f
-> (forall a. a -> f a)
-> (forall a b. f (a -> b) -> f a -> f b)
-> (forall a b c. (a -> b -> c) -> f a -> f b -> f c)
-> (forall a b. f a -> f b -> f b)
-> (forall a b. f a -> f b -> f a)
-> Applicative f
<* :: Rebuild a -> Rebuild b -> Rebuild a
$c<* :: forall a b. Rebuild a -> Rebuild b -> Rebuild a
*> :: Rebuild a -> Rebuild b -> Rebuild b
$c*> :: forall a b. Rebuild a -> Rebuild b -> Rebuild b
liftA2 :: (a -> b -> c) -> Rebuild a -> Rebuild b -> Rebuild c
$cliftA2 :: forall a b c. (a -> b -> c) -> Rebuild a -> Rebuild b -> Rebuild c
<*> :: Rebuild (a -> b) -> Rebuild a -> Rebuild b
$c<*> :: forall a b. Rebuild (a -> b) -> Rebuild a -> Rebuild b
pure :: a -> Rebuild a
$cpure :: forall a. a -> Rebuild a
$cp1Applicative :: Functor Rebuild
Applicative, Applicative Rebuild
a -> Rebuild a
Applicative Rebuild
-> (forall a b. Rebuild a -> (a -> Rebuild b) -> Rebuild b)
-> (forall a b. Rebuild a -> Rebuild b -> Rebuild b)
-> (forall a. a -> Rebuild a)
-> Monad Rebuild
Rebuild a -> (a -> Rebuild b) -> Rebuild b
Rebuild a -> Rebuild b -> Rebuild b
forall a. a -> Rebuild a
forall a b. Rebuild a -> Rebuild b -> Rebuild b
forall a b. Rebuild a -> (a -> Rebuild b) -> Rebuild b
forall (m :: * -> *).
Applicative m
-> (forall a b. m a -> (a -> m b) -> m b)
-> (forall a b. m a -> m b -> m b)
-> (forall a. a -> m a)
-> Monad m
return :: a -> Rebuild a
$creturn :: forall a. a -> Rebuild a
>> :: Rebuild a -> Rebuild b -> Rebuild b
$c>> :: forall a b. Rebuild a -> Rebuild b -> Rebuild b
>>= :: Rebuild a -> (a -> Rebuild b) -> Rebuild b
$c>>= :: forall a b. Rebuild a -> (a -> Rebuild b) -> Rebuild b
$cp1Monad :: Applicative Rebuild
Monad, Monad Rebuild
Monad Rebuild -> (forall a. IO a -> Rebuild a) -> MonadIO Rebuild
IO a -> Rebuild a
forall a. IO a -> Rebuild a
forall (m :: * -> *).
Monad m -> (forall a. IO a -> m a) -> MonadIO m
liftIO :: IO a -> Rebuild a
$cliftIO :: forall a. IO a -> Rebuild a
$cp1MonadIO :: Monad Rebuild
MonadIO)
monitorFiles :: [MonitorFilePath] -> Rebuild ()
monitorFiles :: [MonitorFilePath] -> Rebuild ()
monitorFiles [MonitorFilePath]
filespecs = ReaderT FilePath (StateT [MonitorFilePath] IO) () -> Rebuild ()
forall a.
ReaderT FilePath (StateT [MonitorFilePath] IO) a -> Rebuild a
Rebuild (([MonitorFilePath] -> [MonitorFilePath])
-> ReaderT FilePath (StateT [MonitorFilePath] IO) ()
forall s (m :: * -> *). MonadState s m => (s -> s) -> m ()
State.modify ([MonitorFilePath]
filespecs[MonitorFilePath] -> [MonitorFilePath] -> [MonitorFilePath]
forall a. [a] -> [a] -> [a]
++))
unRebuild :: FilePath -> Rebuild a -> IO (a, [MonitorFilePath])
unRebuild :: FilePath -> Rebuild a -> IO (a, [MonitorFilePath])
unRebuild FilePath
rootDir (Rebuild ReaderT FilePath (StateT [MonitorFilePath] IO) a
action) = StateT [MonitorFilePath] IO a
-> [MonitorFilePath] -> IO (a, [MonitorFilePath])
forall s (m :: * -> *) a. StateT s m a -> s -> m (a, s)
runStateT (ReaderT FilePath (StateT [MonitorFilePath] IO) a
-> FilePath -> StateT [MonitorFilePath] IO a
forall r (m :: * -> *) a. ReaderT r m a -> r -> m a
runReaderT ReaderT FilePath (StateT [MonitorFilePath] IO) a
action FilePath
rootDir) []
runRebuild :: FilePath -> Rebuild a -> IO a
runRebuild :: FilePath -> Rebuild a -> IO a
runRebuild FilePath
rootDir (Rebuild ReaderT FilePath (StateT [MonitorFilePath] IO) a
action) = StateT [MonitorFilePath] IO a -> [MonitorFilePath] -> IO a
forall (m :: * -> *) s a. Monad m => StateT s m a -> s -> m a
evalStateT (ReaderT FilePath (StateT [MonitorFilePath] IO) a
-> FilePath -> StateT [MonitorFilePath] IO a
forall r (m :: * -> *) a. ReaderT r m a -> r -> m a
runReaderT ReaderT FilePath (StateT [MonitorFilePath] IO) a
action FilePath
rootDir) []
execRebuild :: FilePath -> Rebuild a -> IO [MonitorFilePath]
execRebuild :: FilePath -> Rebuild a -> IO [MonitorFilePath]
execRebuild FilePath
rootDir (Rebuild ReaderT FilePath (StateT [MonitorFilePath] IO) a
action) = StateT [MonitorFilePath] IO a
-> [MonitorFilePath] -> IO [MonitorFilePath]
forall (m :: * -> *) s a. Monad m => StateT s m a -> s -> m s
execStateT (ReaderT FilePath (StateT [MonitorFilePath] IO) a
-> FilePath -> StateT [MonitorFilePath] IO a
forall r (m :: * -> *) a. ReaderT r m a -> r -> m a
runReaderT ReaderT FilePath (StateT [MonitorFilePath] IO) a
action FilePath
rootDir) []
askRoot :: Rebuild FilePath
askRoot :: Rebuild FilePath
askRoot = ReaderT FilePath (StateT [MonitorFilePath] IO) FilePath
-> Rebuild FilePath
forall a.
ReaderT FilePath (StateT [MonitorFilePath] IO) a -> Rebuild a
Rebuild ReaderT FilePath (StateT [MonitorFilePath] IO) FilePath
forall r (m :: * -> *). MonadReader r m => m r
Reader.ask
rerunIfChanged :: (Binary a, Structured a, Binary b, Structured b)
=> Verbosity
-> FileMonitor a b
-> a
-> Rebuild b
-> Rebuild b
rerunIfChanged :: Verbosity -> FileMonitor a b -> a -> Rebuild b -> Rebuild b
rerunIfChanged Verbosity
verbosity FileMonitor a b
monitor a
key Rebuild b
action = do
FilePath
rootDir <- Rebuild FilePath
askRoot
MonitorChanged a b
changed <- IO (MonitorChanged a b) -> Rebuild (MonitorChanged a b)
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO (MonitorChanged a b) -> Rebuild (MonitorChanged a b))
-> IO (MonitorChanged a b) -> Rebuild (MonitorChanged a b)
forall a b. (a -> b) -> a -> b
$ FileMonitor a b -> FilePath -> a -> IO (MonitorChanged a b)
forall a b.
(Binary a, Structured a, Binary b, Structured b) =>
FileMonitor a b -> FilePath -> a -> IO (MonitorChanged a b)
checkFileMonitorChanged FileMonitor a b
monitor FilePath
rootDir a
key
case MonitorChanged a b
changed of
MonitorUnchanged b
result [MonitorFilePath]
files -> do
IO () -> Rebuild ()
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> Rebuild ()) -> IO () -> Rebuild ()
forall a b. (a -> b) -> a -> b
$ Verbosity -> FilePath -> IO ()
debug Verbosity
verbosity (FilePath -> IO ()) -> FilePath -> IO ()
forall a b. (a -> b) -> a -> b
$ FilePath
"File monitor '" FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++ FilePath
monitorName
FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++ FilePath
"' unchanged."
[MonitorFilePath] -> Rebuild ()
monitorFiles [MonitorFilePath]
files
b -> Rebuild b
forall (m :: * -> *) a. Monad m => a -> m a
return b
result
MonitorChanged MonitorChangedReason a
reason -> do
IO () -> Rebuild ()
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> Rebuild ()) -> IO () -> Rebuild ()
forall a b. (a -> b) -> a -> b
$ Verbosity -> FilePath -> IO ()
debug Verbosity
verbosity (FilePath -> IO ()) -> FilePath -> IO ()
forall a b. (a -> b) -> a -> b
$ FilePath
"File monitor '" FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++ FilePath
monitorName
FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++ FilePath
"' changed: " FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++ MonitorChangedReason a -> FilePath
forall a. MonitorChangedReason a -> FilePath
showReason MonitorChangedReason a
reason
MonitorTimestamp
startTime <- IO MonitorTimestamp -> Rebuild MonitorTimestamp
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO MonitorTimestamp -> Rebuild MonitorTimestamp)
-> IO MonitorTimestamp -> Rebuild MonitorTimestamp
forall a b. (a -> b) -> a -> b
$ IO MonitorTimestamp
beginUpdateFileMonitor
(b
result, [MonitorFilePath]
files) <- IO (b, [MonitorFilePath]) -> Rebuild (b, [MonitorFilePath])
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO (b, [MonitorFilePath]) -> Rebuild (b, [MonitorFilePath]))
-> IO (b, [MonitorFilePath]) -> Rebuild (b, [MonitorFilePath])
forall a b. (a -> b) -> a -> b
$ FilePath -> Rebuild b -> IO (b, [MonitorFilePath])
forall a. FilePath -> Rebuild a -> IO (a, [MonitorFilePath])
unRebuild FilePath
rootDir Rebuild b
action
IO () -> Rebuild ()
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> Rebuild ()) -> IO () -> Rebuild ()
forall a b. (a -> b) -> a -> b
$ FileMonitor a b
-> FilePath
-> Maybe MonitorTimestamp
-> [MonitorFilePath]
-> a
-> b
-> IO ()
forall a b.
(Binary a, Structured a, Binary b, Structured b) =>
FileMonitor a b
-> FilePath
-> Maybe MonitorTimestamp
-> [MonitorFilePath]
-> a
-> b
-> IO ()
updateFileMonitor FileMonitor a b
monitor FilePath
rootDir
(MonitorTimestamp -> Maybe MonitorTimestamp
forall a. a -> Maybe a
Just MonitorTimestamp
startTime) [MonitorFilePath]
files a
key b
result
[MonitorFilePath] -> Rebuild ()
monitorFiles [MonitorFilePath]
files
b -> Rebuild b
forall (m :: * -> *) a. Monad m => a -> m a
return b
result
where
monitorName :: FilePath
monitorName = FilePath -> FilePath
takeFileName (FileMonitor a b -> FilePath
forall a b. FileMonitor a b -> FilePath
fileMonitorCacheFile FileMonitor a b
monitor)
showReason :: MonitorChangedReason a -> FilePath
showReason (MonitoredFileChanged FilePath
file) = FilePath
"file " FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++ FilePath
file
showReason (MonitoredValueChanged a
_) = FilePath
"monitor value changed"
showReason MonitorChangedReason a
MonitorFirstRun = FilePath
"first run"
showReason MonitorChangedReason a
MonitorCorruptCache = FilePath
"invalid cache file"
delayInitSharedResource :: forall a. IO a -> Rebuild (Rebuild a)
delayInitSharedResource :: IO a -> Rebuild (Rebuild a)
delayInitSharedResource IO a
action = do
MVar (Maybe a)
var <- IO (MVar (Maybe a)) -> Rebuild (MVar (Maybe a))
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (Maybe a -> IO (MVar (Maybe a))
forall a. a -> IO (MVar a)
newMVar Maybe a
forall a. Maybe a
Nothing)
Rebuild a -> Rebuild (Rebuild a)
forall (m :: * -> *) a. Monad m => a -> m a
return (IO a -> Rebuild a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (MVar (Maybe a) -> IO a
getOrInitResource MVar (Maybe a)
var))
where
getOrInitResource :: MVar (Maybe a) -> IO a
getOrInitResource :: MVar (Maybe a) -> IO a
getOrInitResource MVar (Maybe a)
var =
MVar (Maybe a) -> (Maybe a -> IO (Maybe a, a)) -> IO a
forall a b. MVar a -> (a -> IO (a, b)) -> IO b
modifyMVar MVar (Maybe a)
var ((Maybe a -> IO (Maybe a, a)) -> IO a)
-> (Maybe a -> IO (Maybe a, a)) -> IO a
forall a b. (a -> b) -> a -> b
$ \Maybe a
mx ->
case Maybe a
mx of
Just a
x -> (Maybe a, a) -> IO (Maybe a, a)
forall (m :: * -> *) a. Monad m => a -> m a
return (a -> Maybe a
forall a. a -> Maybe a
Just a
x, a
x)
Maybe a
Nothing -> do
a
x <- IO a
action
(Maybe a, a) -> IO (Maybe a, a)
forall (m :: * -> *) a. Monad m => a -> m a
return (a -> Maybe a
forall a. a -> Maybe a
Just a
x, a
x)
delayInitSharedResources :: forall k v. Ord k
=> (k -> IO v)
-> Rebuild (k -> Rebuild v)
delayInitSharedResources :: (k -> IO v) -> Rebuild (k -> Rebuild v)
delayInitSharedResources k -> IO v
action = do
MVar (Map k v)
var <- IO (MVar (Map k v)) -> Rebuild (MVar (Map k v))
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (Map k v -> IO (MVar (Map k v))
forall a. a -> IO (MVar a)
newMVar Map k v
forall k a. Map k a
Map.empty)
(k -> Rebuild v) -> Rebuild (k -> Rebuild v)
forall (m :: * -> *) a. Monad m => a -> m a
return (IO v -> Rebuild v
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO v -> Rebuild v) -> (k -> IO v) -> k -> Rebuild v
forall b c a. (b -> c) -> (a -> b) -> a -> c
. MVar (Map k v) -> k -> IO v
getOrInitResource MVar (Map k v)
var)
where
getOrInitResource :: MVar (Map k v) -> k -> IO v
getOrInitResource :: MVar (Map k v) -> k -> IO v
getOrInitResource MVar (Map k v)
var k
k =
MVar (Map k v) -> (Map k v -> IO (Map k v, v)) -> IO v
forall a b. MVar a -> (a -> IO (a, b)) -> IO b
modifyMVar MVar (Map k v)
var ((Map k v -> IO (Map k v, v)) -> IO v)
-> (Map k v -> IO (Map k v, v)) -> IO v
forall a b. (a -> b) -> a -> b
$ \Map k v
m ->
case k -> Map k v -> Maybe v
forall k a. Ord k => k -> Map k a -> Maybe a
Map.lookup k
k Map k v
m of
Just v
x -> (Map k v, v) -> IO (Map k v, v)
forall (m :: * -> *) a. Monad m => a -> m a
return (Map k v
m, v
x)
Maybe v
Nothing -> do
v
x <- k -> IO v
action k
k
let !m' :: Map k v
m' = k -> v -> Map k v -> Map k v
forall k a. Ord k => k -> a -> Map k a -> Map k a
Map.insert k
k v
x Map k v
m
(Map k v, v) -> IO (Map k v, v)
forall (m :: * -> *) a. Monad m => a -> m a
return (Map k v
m', v
x)
matchFileGlob :: FilePathGlob -> Rebuild [FilePath]
matchFileGlob :: FilePathGlob -> Rebuild [FilePath]
matchFileGlob FilePathGlob
glob = do
FilePath
root <- Rebuild FilePath
askRoot
[MonitorFilePath] -> Rebuild ()
monitorFiles [FilePathGlob -> MonitorFilePath
monitorFileGlobExistence FilePathGlob
glob]
IO [FilePath] -> Rebuild [FilePath]
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO [FilePath] -> Rebuild [FilePath])
-> IO [FilePath] -> Rebuild [FilePath]
forall a b. (a -> b) -> a -> b
$ FilePath -> FilePathGlob -> IO [FilePath]
Glob.matchFileGlob FilePath
root FilePathGlob
glob
getDirectoryContentsMonitored :: FilePath -> Rebuild [FilePath]
getDirectoryContentsMonitored :: FilePath -> Rebuild [FilePath]
getDirectoryContentsMonitored FilePath
dir = do
Bool
exists <- FilePath -> Rebuild Bool
monitorDirectoryStatus FilePath
dir
if Bool
exists
then IO [FilePath] -> Rebuild [FilePath]
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO [FilePath] -> Rebuild [FilePath])
-> IO [FilePath] -> Rebuild [FilePath]
forall a b. (a -> b) -> a -> b
$ FilePath -> IO [FilePath]
getDirectoryContents FilePath
dir
else [FilePath] -> Rebuild [FilePath]
forall (m :: * -> *) a. Monad m => a -> m a
return []
createDirectoryMonitored :: Bool -> FilePath -> Rebuild ()
createDirectoryMonitored :: Bool -> FilePath -> Rebuild ()
createDirectoryMonitored Bool
createParents FilePath
dir = do
[MonitorFilePath] -> Rebuild ()
monitorFiles [FilePath -> MonitorFilePath
monitorDirectoryExistence FilePath
dir]
IO () -> Rebuild ()
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> Rebuild ()) -> IO () -> Rebuild ()
forall a b. (a -> b) -> a -> b
$ Bool -> FilePath -> IO ()
createDirectoryIfMissing Bool
createParents FilePath
dir
monitorDirectoryStatus :: FilePath -> Rebuild Bool
monitorDirectoryStatus :: FilePath -> Rebuild Bool
monitorDirectoryStatus FilePath
dir = do
Bool
exists <- IO Bool -> Rebuild Bool
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Bool -> Rebuild Bool) -> IO Bool -> Rebuild Bool
forall a b. (a -> b) -> a -> b
$ FilePath -> IO Bool
doesDirectoryExist FilePath
dir
[MonitorFilePath] -> Rebuild ()
monitorFiles [if Bool
exists
then FilePath -> MonitorFilePath
monitorDirectory FilePath
dir
else FilePath -> MonitorFilePath
monitorNonExistentDirectory FilePath
dir]
Bool -> Rebuild Bool
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
exists
doesFileExistMonitored :: FilePath -> Rebuild Bool
doesFileExistMonitored :: FilePath -> Rebuild Bool
doesFileExistMonitored FilePath
f = do
FilePath
root <- Rebuild FilePath
askRoot
Bool
exists <- IO Bool -> Rebuild Bool
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Bool -> Rebuild Bool) -> IO Bool -> Rebuild Bool
forall a b. (a -> b) -> a -> b
$ FilePath -> IO Bool
doesFileExist (FilePath
root FilePath -> FilePath -> FilePath
</> FilePath
f)
[MonitorFilePath] -> Rebuild ()
monitorFiles [if Bool
exists
then FilePath -> MonitorFilePath
monitorFileExistence FilePath
f
else FilePath -> MonitorFilePath
monitorNonExistentFile FilePath
f]
Bool -> Rebuild Bool
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
exists
need :: FilePath -> Rebuild ()
need :: FilePath -> Rebuild ()
need FilePath
f = [MonitorFilePath] -> Rebuild ()
monitorFiles [FilePath -> MonitorFilePath
monitorFileHashed FilePath
f]
needIfExists :: FilePath -> Rebuild ()
needIfExists :: FilePath -> Rebuild ()
needIfExists FilePath
f = do
FilePath
root <- Rebuild FilePath
askRoot
Bool
exists <- IO Bool -> Rebuild Bool
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Bool -> Rebuild Bool) -> IO Bool -> Rebuild Bool
forall a b. (a -> b) -> a -> b
$ FilePath -> IO Bool
doesFileExist (FilePath
root FilePath -> FilePath -> FilePath
</> FilePath
f)
[MonitorFilePath] -> Rebuild ()
monitorFiles [if Bool
exists
then FilePath -> MonitorFilePath
monitorFileHashed FilePath
f
else FilePath -> MonitorFilePath
monitorNonExistentFile FilePath
f]
findFileWithExtensionMonitored
:: [String]
-> [FilePath]
-> FilePath
-> Rebuild (Maybe FilePath)
findFileWithExtensionMonitored :: [FilePath] -> [FilePath] -> FilePath -> Rebuild (Maybe FilePath)
findFileWithExtensionMonitored [FilePath]
extensions [FilePath]
searchPath FilePath
baseName =
(FilePath -> FilePath) -> [FilePath] -> Rebuild (Maybe FilePath)
forall a. (a -> FilePath) -> [a] -> Rebuild (Maybe a)
findFirstFileMonitored FilePath -> FilePath
forall a. a -> a
id
[ FilePath
path FilePath -> FilePath -> FilePath
</> FilePath
baseName FilePath -> FilePath -> FilePath
<.> FilePath
ext
| FilePath
path <- [FilePath] -> [FilePath]
forall a. Eq a => [a] -> [a]
nub [FilePath]
searchPath
, FilePath
ext <- [FilePath] -> [FilePath]
forall a. Eq a => [a] -> [a]
nub [FilePath]
extensions ]
findFirstFileMonitored :: forall a. (a -> FilePath) -> [a] -> Rebuild (Maybe a)
findFirstFileMonitored :: (a -> FilePath) -> [a] -> Rebuild (Maybe a)
findFirstFileMonitored a -> FilePath
file = [a] -> Rebuild (Maybe a)
findFirst
where findFirst :: [a] -> Rebuild (Maybe a)
findFirst :: [a] -> Rebuild (Maybe a)
findFirst [] = Maybe a -> Rebuild (Maybe a)
forall (m :: * -> *) a. Monad m => a -> m a
return Maybe a
forall a. Maybe a
Nothing
findFirst (a
x:[a]
xs) = do Bool
exists <- FilePath -> Rebuild Bool
doesFileExistMonitored (a -> FilePath
file a
x)
if Bool
exists
then Maybe a -> Rebuild (Maybe a)
forall (m :: * -> *) a. Monad m => a -> m a
return (a -> Maybe a
forall a. a -> Maybe a
Just a
x)
else [a] -> Rebuild (Maybe a)
findFirst [a]
xs
findFileMonitored :: [FilePath] -> FilePath -> Rebuild (Maybe FilePath)
findFileMonitored :: [FilePath] -> FilePath -> Rebuild (Maybe FilePath)
findFileMonitored [FilePath]
searchPath FilePath
fileName =
(FilePath -> FilePath) -> [FilePath] -> Rebuild (Maybe FilePath)
forall a. (a -> FilePath) -> [a] -> Rebuild (Maybe a)
findFirstFileMonitored FilePath -> FilePath
forall a. a -> a
id
[ FilePath
path FilePath -> FilePath -> FilePath
</> FilePath
fileName
| FilePath
path <- [FilePath] -> [FilePath]
forall a. Eq a => [a] -> [a]
nub [FilePath]
searchPath]