| Safe Haskell | Safe-Inferred |
|---|---|
| Language | Haskell2010 |
Development.IDE.Session
Description
The logic for setting up a ghcide session by tapping into hie-bios.
Synopsis
- data SessionLoadingOptions = SessionLoadingOptions {}
- data CacheDirs = CacheDirs {}
- loadSession :: Recorder (WithPriority Log) -> FilePath -> IO (Action IdeGhcSession)
- loadSessionWithOptions :: Recorder (WithPriority Log) -> SessionLoadingOptions -> FilePath -> IO (Action IdeGhcSession)
- setInitialDynFlags :: Recorder (WithPriority Log) -> FilePath -> SessionLoadingOptions -> IO (Maybe LibDir)
- getHieDbLoc :: FilePath -> IO FilePath
- runWithDb :: Recorder (WithPriority Log) -> FilePath -> (WithHieDb -> IndexQueue -> IO ()) -> IO ()
- retryOnSqliteBusy :: (MonadIO m, MonadCatch m, RandomGen g) => Recorder (WithPriority Log) -> g -> m a -> m a
- retryOnException :: (MonadIO m, MonadCatch m, RandomGen g, Exception e) => (e -> Maybe e) -> Recorder (WithPriority Log) -> Int -> Int -> Int -> g -> m a -> m a
- data Log
- = LogSettingInitialDynFlags
- | LogGetInitialGhcLibDirDefaultCradleFail !CradleError !FilePath !(Maybe FilePath) !(Cradle Void)
- | LogGetInitialGhcLibDirDefaultCradleNone
- | LogHieDbRetry !Int !Int !Int !SomeException
- | LogHieDbRetriesExhausted !Int !Int !Int !SomeException
- | LogHieDbWriterThreadSQLiteError !SQLError
- | LogHieDbWriterThreadException !SomeException
- | LogInterfaceFilesCacheDir !FilePath
- | LogKnownFilesUpdated !(HashMap Target (HashSet NormalizedFilePath))
- | LogMakingNewHscEnv ![UnitId]
- | LogDLLLoadError !String
- | LogCradlePath !FilePath
- | LogCradleNotFound !FilePath
- | LogSessionLoadingResult !(Either [CradleError] (ComponentOptions, FilePath))
- | LogCradle !(Cradle Void)
- | LogNoneCradleFound FilePath
- | LogNewComponentCache !(([FileDiagnostic], Maybe HscEnvEq), DependencyInfo)
- | LogHieBios Log
Documentation
data SessionLoadingOptions Source #
Constructors
| SessionLoadingOptions | |
Fields
| |
Instances
| Default SessionLoadingOptions Source # | |
Defined in Development.IDE.Session Methods | |
Constructors
| CacheDirs | |
Fields | |
loadSession :: Recorder (WithPriority Log) -> FilePath -> IO (Action IdeGhcSession) Source #
Given a root directory, return a Shake Action which setups an
IdeGhcSession given a file.
Some of the many things this does:
- Find the cradle for the file
- Get the session options,
- Get the GHC lib directory
- Make sure the GHC compiletime and runtime versions match
- Restart the Shake session
This is the key function which implements multi-component support. All components mapping to the same hie.yaml file are mapped to the same HscEnv which is updated as new components are discovered.
loadSessionWithOptions :: Recorder (WithPriority Log) -> SessionLoadingOptions -> FilePath -> IO (Action IdeGhcSession) Source #
setInitialDynFlags :: Recorder (WithPriority Log) -> FilePath -> SessionLoadingOptions -> IO (Maybe LibDir) Source #
Sets unsafeGlobalDynFlags on using the hie-bios cradle and returns the GHC libdir
runWithDb :: Recorder (WithPriority Log) -> FilePath -> (WithHieDb -> IndexQueue -> IO ()) -> IO () Source #
Wraps withHieDb to provide a database connection for reading, and a HieWriterChan for
writing. Actions are picked off one by one from the HieWriterChan and executed in serial
by a worker thread using a dedicated database connection.
This is done in order to serialize writes to the database, or else SQLite becomes unhappy
retryOnSqliteBusy :: (MonadIO m, MonadCatch m, RandomGen g) => Recorder (WithPriority Log) -> g -> m a -> m a Source #
Arguments
| :: (MonadIO m, MonadCatch m, RandomGen g, Exception e) | |
| => (e -> Maybe e) | only retry on exception if this predicate returns Just |
| -> Recorder (WithPriority Log) | |
| -> Int | maximum backoff delay in microseconds |
| -> Int | base backoff delay in microseconds |
| -> Int | maximum number of times to retry |
| -> g | random number generator |
| -> m a | action that may throw exception |
| -> m a |
If the action throws exception that satisfies predicate then we sleep for
a duration determined by the random exponential backoff formula,
`uniformRandom(0, min (maxDelay, (baseDelay * 2) ^ retryAttempt))`, and try
the action again for a maximum of maxRetryCount times.
MonadIO, MonadCatch are used as constraints because there are a few
HieDb functions that don't return IO values.
Constructors