59 lines
1.6 KiB
Haskell
59 lines
1.6 KiB
Haskell
-- | Development version to be run inside GHCi.
|
|
--
|
|
-- start this up with:
|
|
--
|
|
-- cabal repl --ghc-options="-O0 -fobject-code"
|
|
--
|
|
-- You will need to add these packages to your .cabal file
|
|
-- * foreign-store (very light-weight)
|
|
-- * warp (you already depend on this, it just isn't in your .cabal file)
|
|
--
|
|
-- If you don't use cabal repl, you will need
|
|
-- to run the following in GHCi or to add it to
|
|
-- your .ghci file.
|
|
--
|
|
-- :set -DDEVELOPMENT
|
|
--
|
|
-- There is more information about this approach,
|
|
-- on the wiki: https://github.com/yesodweb/yesod/wiki/ghci
|
|
|
|
module DevelMain where
|
|
|
|
import Application (getApplicationDev)
|
|
|
|
import Control.Exception (finally)
|
|
import Control.Concurrent
|
|
import Data.IORef
|
|
import Foreign.Store
|
|
import Network.Wai.Handler.Warp
|
|
|
|
-- | Start or restart the server.
|
|
update :: IO ()
|
|
update = do
|
|
mtidStore <- lookupStore tid_1
|
|
case mtidStore of
|
|
Nothing -> do
|
|
done <- newEmptyMVar
|
|
_done_0 <- newStore done
|
|
tid <- start done
|
|
tidRef <- newIORef tid
|
|
_tid_1 <- newStore tidRef
|
|
return ()
|
|
Just tidStore -> do
|
|
tidRef <- readStore tidStore
|
|
tid <- readIORef tidRef
|
|
done <- readStore (Store done_0)
|
|
killThread tid
|
|
takeMVar done
|
|
newTid <- start done
|
|
writeIORef tidRef newTid
|
|
where tid_1 = 1
|
|
done_0 = 0
|
|
|
|
-- | Start the server in a separate thread.
|
|
start :: MVar () -- ^ Written to when the thread is killed.
|
|
-> IO ThreadId
|
|
start done = do
|
|
(port,app) <- getApplicationDev
|
|
forkIO (finally (runSettings (setPort port defaultSettings) app)
|
|
(putMVar done ()))
|