{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE TupleSections #-}
module Stack.FileWatch
( WatchMode (WatchModePoll)
, fileWatch
, fileWatchPoll
) where
import Control.Concurrent.STM ( check )
import qualified Data.Map.Strict as Map
import qualified Data.Set as Set
import GHC.IO.Exception
import Path
import Stack.Prelude
import System.FSNotify
import System.IO ( getLine )
fileWatch
:: (HasLogFunc env, HasTerm env)
=> ((Set (Path Abs File) -> IO ()) -> RIO env ())
-> RIO env ()
fileWatch :: forall env.
(HasLogFunc env, HasTerm env) =>
((Set (Path Abs File) -> IO ()) -> RIO env ()) -> RIO env ()
fileWatch = forall env.
(HasLogFunc env, HasTerm env) =>
WatchConfig
-> ((Set (Path Abs File) -> IO ()) -> RIO env ()) -> RIO env ()
fileWatchConf WatchConfig
defaultConfig
fileWatchPoll
:: (HasLogFunc env, HasTerm env)
=> ((Set (Path Abs File) -> IO ()) -> RIO env ())
-> RIO env ()
fileWatchPoll :: forall env.
(HasLogFunc env, HasTerm env) =>
((Set (Path Abs File) -> IO ()) -> RIO env ()) -> RIO env ()
fileWatchPoll =
forall env.
(HasLogFunc env, HasTerm env) =>
WatchConfig
-> ((Set (Path Abs File) -> IO ()) -> RIO env ()) -> RIO env ()
fileWatchConf forall a b. (a -> b) -> a -> b
$ WatchConfig
defaultConfig { confWatchMode :: WatchMode
confWatchMode = Int -> WatchMode
WatchModePoll Int
1000000 }
fileWatchConf
:: (HasLogFunc env, HasTerm env)
=> WatchConfig
-> ((Set (Path Abs File) -> IO ()) -> RIO env ())
-> RIO env ()
fileWatchConf :: forall env.
(HasLogFunc env, HasTerm env) =>
WatchConfig
-> ((Set (Path Abs File) -> IO ()) -> RIO env ()) -> RIO env ()
fileWatchConf WatchConfig
cfg (Set (Path Abs File) -> IO ()) -> RIO env ()
inner = forall (m :: * -> *) b.
MonadUnliftIO m =>
((forall a. m a -> IO a) -> IO b) -> m b
withRunInIO forall a b. (a -> b) -> a -> b
$ \forall a. RIO env a -> IO a
run -> forall a. WatchConfig -> (WatchManager -> IO a) -> IO a
withManagerConf WatchConfig
cfg forall a b. (a -> b) -> a -> b
$ \WatchManager
manager -> do
TVar (Set FilePath)
allFiles <- forall (m :: * -> *) a. MonadIO m => a -> m (TVar a)
newTVarIO forall a. Set a
Set.empty
TVar Bool
dirtyVar <- forall (m :: * -> *) a. MonadIO m => a -> m (TVar a)
newTVarIO Bool
True
TVar (Map (Path Abs Dir) (IO ()))
watchVar <- forall (m :: * -> *) a. MonadIO m => a -> m (TVar a)
newTVarIO forall k a. Map k a
Map.empty
let onChange :: Event -> m ()
onChange Event
event = forall (m :: * -> *) a. MonadIO m => STM a -> m a
atomically forall a b. (a -> b) -> a -> b
$ do
Set FilePath
files <- forall a. TVar a -> STM a
readTVar TVar (Set FilePath)
allFiles
forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
when (Event -> FilePath
eventPath Event
event forall a. Ord a => a -> Set a -> Bool
`Set.member` Set FilePath
files) (forall a. TVar a -> a -> STM ()
writeTVar TVar Bool
dirtyVar Bool
True)
setWatched :: Set (Path Abs File) -> IO ()
setWatched :: Set (Path Abs File) -> IO ()
setWatched Set (Path Abs File)
files = do
forall (m :: * -> *) a. MonadIO m => STM a -> m a
atomically forall a b. (a -> b) -> a -> b
$ forall a. TVar a -> a -> STM ()
writeTVar TVar (Set FilePath)
allFiles forall a b. (a -> b) -> a -> b
$ forall b a. Ord b => (a -> b) -> Set a -> Set b
Set.map forall b t. Path b t -> FilePath
toFilePath Set (Path Abs File)
files
Map (Path Abs Dir) (IO ())
watch0 <- forall (m :: * -> *) a. MonadIO m => TVar a -> m a
readTVarIO TVar (Map (Path Abs Dir) (IO ()))
watchVar
let actions :: Map (Path Abs Dir) (IO (Maybe (IO ())))
actions = forall k a b c.
Ord k =>
(k -> a -> b -> Maybe c)
-> (Map k a -> Map k c)
-> (Map k b -> Map k c)
-> Map k a
-> Map k b
-> Map k c
Map.mergeWithKey
forall {f :: * -> *} {p} {a}.
Applicative f =>
p -> a -> () -> Maybe (f (Maybe a))
keepListening
forall {k} {a}. Map k (IO ()) -> Map k (IO (Maybe a))
stopListening
forall {b} {t}.
Map (Path b t) () -> Map (Path b t) (IO (Maybe (IO ())))
startListening
Map (Path Abs Dir) (IO ())
watch0
Map (Path Abs Dir) ()
newDirs
[Map (Path Abs Dir) (IO ())]
watch1 <- forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
t a -> (a -> m b) -> m (t b)
forM (forall k a. Map k a -> [(k, a)]
Map.toList Map (Path Abs Dir) (IO (Maybe (IO ())))
actions) forall a b. (a -> b) -> a -> b
$ \(Path Abs Dir
k, IO (Maybe (IO ()))
mmv) -> do
Maybe (IO ())
mv <- IO (Maybe (IO ()))
mmv
forall (f :: * -> *) a. Applicative f => a -> f a
pure forall a b. (a -> b) -> a -> b
$
case Maybe (IO ())
mv of
Maybe (IO ())
Nothing -> forall k a. Map k a
Map.empty
Just IO ()
v -> forall k a. k -> a -> Map k a
Map.singleton Path Abs Dir
k IO ()
v
forall (m :: * -> *) a. MonadIO m => STM a -> m a
atomically forall a b. (a -> b) -> a -> b
$ forall a. TVar a -> a -> STM ()
writeTVar TVar (Map (Path Abs Dir) (IO ()))
watchVar forall a b. (a -> b) -> a -> b
$ forall (f :: * -> *) k a.
(Foldable f, Ord k) =>
f (Map k a) -> Map k a
Map.unions [Map (Path Abs Dir) (IO ())]
watch1
where
newDirs :: Map (Path Abs Dir) ()
newDirs = forall k a. Ord k => [(k, a)] -> Map k a
Map.fromList forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map (, ())
forall a b. (a -> b) -> a -> b
$ forall a. Set a -> [a]
Set.toList
forall a b. (a -> b) -> a -> b
$ forall b a. Ord b => (a -> b) -> Set a -> Set b
Set.map forall b t. Path b t -> Path b Dir
parent Set (Path Abs File)
files
keepListening :: p -> a -> () -> Maybe (f (Maybe a))
keepListening p
_dir a
listen () = forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ forall (f :: * -> *) a. Applicative f => a -> f a
pure forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just a
listen
stopListening :: Map k (IO ()) -> Map k (IO (Maybe a))
stopListening = forall a b k. (a -> b) -> Map k a -> Map k b
Map.map forall a b. (a -> b) -> a -> b
$ \IO ()
f -> do
() <- IO ()
f forall (m :: * -> *) e a.
(MonadUnliftIO m, Exception e) =>
m a -> (e -> m a) -> m a
`catch` \IOException
ioe ->
case IOException -> IOErrorType
ioe_type IOException
ioe of
IOErrorType
InvalidArgument -> forall (f :: * -> *) a. Applicative f => a -> f a
pure ()
IOErrorType
_ -> forall (m :: * -> *) e a. (MonadIO m, Exception e) => e -> m a
throwIO IOException
ioe
forall (f :: * -> *) a. Applicative f => a -> f a
pure forall a. Maybe a
Nothing
startListening :: Map (Path b t) () -> Map (Path b t) (IO (Maybe (IO ())))
startListening = forall k a b. (k -> a -> b) -> Map k a -> Map k b
Map.mapWithKey forall a b. (a -> b) -> a -> b
$ \Path b t
dir () -> do
let dir' :: FilePath
dir' = forall a. IsString a => FilePath -> a
fromString forall a b. (a -> b) -> a -> b
$ forall b t. Path b t -> FilePath
toFilePath Path b t
dir
IO ()
listen <- WatchManager -> FilePath -> ActionPredicate -> Action -> IO (IO ())
watchDir WatchManager
manager FilePath
dir' (forall a b. a -> b -> a
const Bool
True) forall {m :: * -> *}. MonadIO m => Event -> m ()
onChange
forall (f :: * -> *) a. Applicative f => a -> f a
pure forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just IO ()
listen
let watchInput :: IO ()
watchInput = do
FilePath
l <- IO FilePath
getLine
forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
unless (FilePath
l forall a. Eq a => a -> a -> Bool
== FilePath
"quit") forall a b. (a -> b) -> a -> b
$ do
forall a. RIO env a -> IO a
run forall a b. (a -> b) -> a -> b
$ case FilePath
l of
FilePath
"help" -> do
forall (m :: * -> *) env.
(MonadIO m, MonadReader env m, HasLogFunc env, HasCallStack) =>
Utf8Builder -> m ()
logInfo Utf8Builder
""
forall (m :: * -> *) env.
(MonadIO m, MonadReader env m, HasLogFunc env, HasCallStack) =>
Utf8Builder -> m ()
logInfo Utf8Builder
"help: display this help"
forall (m :: * -> *) env.
(MonadIO m, MonadReader env m, HasLogFunc env, HasCallStack) =>
Utf8Builder -> m ()
logInfo Utf8Builder
"quit: exit"
forall (m :: * -> *) env.
(MonadIO m, MonadReader env m, HasLogFunc env, HasCallStack) =>
Utf8Builder -> m ()
logInfo Utf8Builder
"build: force a rebuild"
forall (m :: * -> *) env.
(MonadIO m, MonadReader env m, HasLogFunc env, HasCallStack) =>
Utf8Builder -> m ()
logInfo Utf8Builder
"watched: display watched files"
FilePath
"build" -> forall (m :: * -> *) a. MonadIO m => STM a -> m a
atomically forall a b. (a -> b) -> a -> b
$ forall a. TVar a -> a -> STM ()
writeTVar TVar Bool
dirtyVar Bool
True
FilePath
"watched" -> do
Set FilePath
watch <- forall (m :: * -> *) a. MonadIO m => TVar a -> m a
readTVarIO TVar (Set FilePath)
allFiles
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
(a -> m b) -> t a -> m ()
mapM_ (forall (m :: * -> *) env.
(MonadIO m, MonadReader env m, HasLogFunc env, HasCallStack) =>
Utf8Builder -> m ()
logInfo forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a. IsString a => FilePath -> a
fromString) (forall a. Set a -> [a]
Set.toList Set FilePath
watch)
FilePath
"" -> forall (m :: * -> *) a. MonadIO m => STM a -> m a
atomically forall a b. (a -> b) -> a -> b
$ forall a. TVar a -> a -> STM ()
writeTVar TVar Bool
dirtyVar Bool
True
FilePath
_ -> forall (m :: * -> *) env.
(MonadIO m, MonadReader env m, HasLogFunc env, HasCallStack) =>
Utf8Builder -> m ()
logInfo forall a b. (a -> b) -> a -> b
$
Utf8Builder
"Unknown command: " forall a. Semigroup a => a -> a -> a
<>
forall a. Show a => a -> Utf8Builder
displayShow FilePath
l forall a. Semigroup a => a -> a -> a
<>
Utf8Builder
". Try 'help'"
IO ()
watchInput
forall (m :: * -> *) a b. MonadUnliftIO m => m a -> m b -> m ()
race_ IO ()
watchInput forall a b. (a -> b) -> a -> b
$ forall a. RIO env a -> IO a
run forall a b. (a -> b) -> a -> b
$ forall (f :: * -> *) a b. Applicative f => f a -> f b
forever forall a b. (a -> b) -> a -> b
$ do
forall (m :: * -> *) a. MonadIO m => STM a -> m a
atomically forall a b. (a -> b) -> a -> b
$ do
Bool
dirty <- forall a. TVar a -> STM a
readTVar TVar Bool
dirtyVar
Bool -> STM ()
check Bool
dirty
Either SomeException ()
eres <- forall (m :: * -> *) a.
MonadUnliftIO m =>
m a -> m (Either SomeException a)
tryAny forall a b. (a -> b) -> a -> b
$ (Set (Path Abs File) -> IO ()) -> RIO env ()
inner Set (Path Abs File) -> IO ()
setWatched
forall (m :: * -> *) a. MonadIO m => STM a -> m a
atomically forall a b. (a -> b) -> a -> b
$ forall a. TVar a -> a -> STM ()
writeTVar TVar Bool
dirtyVar Bool
False
forall env (m :: * -> *).
(HasCallStack, HasTerm env, MonadReader env m, MonadIO m) =>
StyleDoc -> m ()
prettyInfo forall a b. (a -> b) -> a -> b
$
case Either SomeException ()
eres of
Left SomeException
e ->
let theStyle :: Style
theStyle = case forall e. Exception e => SomeException -> Maybe e
fromException SomeException
e of
Just ExitCode
ExitSuccess -> Style
Good
Maybe ExitCode
_ -> Style
Error
in Style -> StyleDoc -> StyleDoc
style Style
theStyle forall a b. (a -> b) -> a -> b
$ forall a. IsString a => FilePath -> a
fromString forall a b. (a -> b) -> a -> b
$ forall e. Exception e => e -> FilePath
displayException SomeException
e
Either SomeException ()
_ -> Style -> StyleDoc -> StyleDoc
style Style
Good StyleDoc
"Success! Waiting for next file change."
forall (m :: * -> *) env.
(MonadIO m, MonadReader env m, HasLogFunc env, HasCallStack) =>
Utf8Builder -> m ()
logInfo Utf8Builder
"Type help for available commands. Press enter to force a rebuild."