Splint.Settings

Documentation

type Settings = (ParseFlags, [Classify], Hint)

cache :: TVar (Map [String] (RemoteData IOException Settings))

Getting settings is not instantaneous. Since settings are usually reused between modules, it makes sense to cache them. However each module can potentially customize its settings using the OPTIONS_GHC pragma. This variable is used as a cache of settings keyed on the command line options.

semaphore :: TMVar ()

Even though we cache settings based on command line options, we only want to load settings one at a time. Practically this is to work around a bug in GHC. But aside from that, loading settings calls withArgs and doing that simultaneously in separate threads is dubious. https://gitlab.haskell.org/ghc/ghc/issues/18261

withTMVar :: TMVar a -> (a -> IO b) -> IO b

load :: [String] -> IO Settings