When I run "yesod devel" it says "devel.hs: Maybe.fromJust: Nothing
yesod init # created a project bbbb
...
cabal install && yesod devel
...
Registering bbbb-0.0.0...
Starting development server...
Starting devel application
devel.hs: Maybe.fromJust: Nothing
And the web server is not listening the port (I cannot open the site in my browser)
Does anyone know how to fix this?
My environment:
- yesod-0.9.4.1
- The Glorious Glasgow Haskell Compilation System, version 7.0.3
- Mac OS X 10.6.8
Here is dist/devel.hs, which "yesod init" created:
{-# LANGUAGE PackageImports #-}
import "bbbb" Application (withDevelAppPort)
import Data.Dynamic (fromDynamic)
import Network.Wai.Handler.Warp
(runSettings, defaultSettings, settingsPort, settingsHost)
import Data.Maybe (fromJust)
import Control.Concurrent (forkIO)
import System.Directory (doesFileExist, removeFile)
import System.Exit (exitSuccess)
import Control.Concurrent (threadDelay)
main :: IO ()
main = do
putStrLn "Starting devel application"
wdap <- (return . fromJust . fromDynamic) withDevelAppPort
forkIO . wdap $ \(port, app) -> runSettings defaultSettings
{ settingsPort = port
, settingsHost = "0.0.0.0"
} app
loop
loop :: IO ()
loop = do
threadDelay 100000
e <- doesFileExist "dist/devel-terminate"
if e then terminateDevel else loop
terminateDevel :: IO ()
terminateDevel = exitSuccess
I uploaded all files in bbbb directory and Application.hs is https://github.com/suztomo/LanguageStudy/blob/master/Haskell/Yesod/bbbb/Application.hs .
