wai-devel (empty) → 0.0.0.1
raw patch · 15 files changed
+1729/−0 lines, 15 filesdep +Cabal-ide-backenddep +Globdep +MissingHsetup-changed
Dependencies added: Cabal-ide-backend, Glob, MissingH, array, base, blaze-html, bytestring, directory, file-embed, filepath, fsnotify, ghc, hspec, http-client, http-conduit, http-reverse-proxy, http-types, ide-backend, network, optparse-applicative, process, shakespeare, stm, streaming-commons, system-filepath, text, time, transformers, wai, wai-devel, warp, websockets
Files
- LICENSE +674/−0
- Setup.hs +2/−0
- src/Devel.hs +61/−0
- src/Devel/Build.hs +129/−0
- src/Devel/CmdArgs.hs +43/−0
- src/Devel/Compile.hs +198/−0
- src/Devel/Config.hs +122/−0
- src/Devel/Modules.hs +37/−0
- src/Devel/Paths.hs +107/−0
- src/Devel/ReverseProxy.hs +92/−0
- src/Devel/Types.hs +31/−0
- src/Devel/Watch.hs +79/−0
- src/Main.hs +29/−0
- tests/Spec.hs +1/−0
- wai-devel.cabal +124/−0
+ LICENSE view
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+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ src/Devel.hs view
@@ -0,0 +1,61 @@+{-|+Module : Devel+Description : An entry point for GHC to compile yesod-devel.+Copyright : (c)+License : GPL-3+Maintainer : njagi@urbanslug.com+Stability : experimental+Portability : POSIX+-}+module Devel (buildAndRun) where++-- Related to config+import IdeSession (sessionConfigFromEnv)+import System.Environment (lookupEnv, setEnv)++-- Internal functions.+import Devel.Config (setConfig)+import Devel.ReverseProxy (cyclePorts)+import Devel.Build (build)++-- | Build and run our haskell application.+buildAndRun :: FilePath -> String -> Bool -> IO ()+buildAndRun buildFile runFunction isReverseProxy = do++ -- set Environment variables: GHC_PACKAGE_PATH and PATH+ -- Needed for ide-backend to provide sessionConfig+ _ <- setConfig+++ -- Let ide-backend set session config now because ide-backend can't set it during rebuilds.+ -- We then pass sessionConfig around between rebuilds+ -- You must restart wai-devel in the terminal for it to get a new session config+ sessionConfig <- sessionConfigFromEnv++ -- If port isn't set we assume port 3000+ maybePort <- lookupEnv "PORT"+ let fromProxyPort = case maybePort of+ Just port -> read port :: Int+ _ -> 3000++ -- Look for and give us a port to reverse proxy to+ -- i.e a destination port.+ toProxyPort <- cyclePorts fromProxyPort++ -- Set PORT depending on whether reverse proxying is disallowed or not.+ -- If reverse proxying is set to disabled i.e False+ -- Then PORT variable is set to the source port i.e fromProxyPort+ -- By default reverse proxying is True.+ if isReverseProxy+ then setEnv "PORT" (show toProxyPort)+ else setEnv "PORT" (show fromProxyPort)++ -- We call the build function only the first time we want to build our application.+ build+ buildFile -- The target file, should contain the function we wish to call.+ runFunction -- The function we want to call.+ isReverseProxy -- Use reverse proxying? Default to True. + sessionConfig -- We need this when compiling.+ (fromProxyPort, toProxyPort) -- The port we reverse proxy to and from.+ Nothing -- Maybe IdeSession+ False -- To rebuild or not to.
+ src/Devel/Build.hs view
@@ -0,0 +1,129 @@+{-|+Module : Devel.Compile+Description : For building and running your WAI application.+Copyright : (c)+License : GPL-3+Maintainer : njagi@urbanslug.com+Stability : experimental+Portability : POSIX+-}++{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE CPP #-}++module Devel.Build +( build+) where+++import IdeSession+import qualified Data.ByteString.Char8 as S8+import Data.Text (unpack)++import GHC.Conc (newTVarIO)+import Control.Concurrent (forkIO, killThread, ThreadId)++-- Rebuild+import Control.Monad (unless)+# if __GLASGOW_HASKELL__ < 710+import Data.Monoid (mempty)+#endif++import Devel.Compile+import Devel.ReverseProxy (startReverseProxy)+import Devel.Watch+++-- | Compiles and calls run on your WAI application.+build :: FilePath -> String -> Bool -> SessionConfig -> (Int, Int) -> Maybe IdeSession -> Bool -> IO ()+build buildFile runFunction isReverseProxy sessionConfig (fromProxyPort, toProxyPort) mSession isRebuild = do++ (initialSession, extensionList, includeTargets) <- initCompile sessionConfig mSession++ -- Do this if isRebuild is False.+ unless isRebuild $+ if isReverseProxy then+ do _ <- forkIO $ startReverseProxy (fromProxyPort, toProxyPort)+ putStrLn $ "Starting devel application at http://localhost:" +++ show fromProxyPort+ else+ putStrLn $ "Starting app without reverse proxying at http://localhost:" +++ show fromProxyPort+++ (updatedSession, update) <- + if isRebuild+ then return (initialSession, mempty)+ else compile initialSession buildFile extensionList includeTargets++ eitherSession <- finishCompile (updatedSession, update)++ case eitherSession of+ Left _ -> do+ -- Listen for changes in the current working directory.+ isDirty <- newTVarIO False++ _ <- forkIO $ watch isDirty includeTargets++ -- Block until relevant change is made then carry on with program execution.+ _ <- checkForChange isDirty++ -- Stop the current app.+ putStrLn "\n\nRebuilding...\n\n"+ + _ <- shutdownSession updatedSession++ -- Coming to fix.+ build buildFile runFunction False sessionConfig (fromProxyPort, toProxyPort) Nothing False++ Right session -> do+ -- run the session+ (runActionsRunResult, threadId) <- run session buildFile runFunction++ -- Start watching for file changes.+ isDirty <- newTVarIO False++ -- Watch for changes in the current working directory.+ watchId <- forkIO $ watch isDirty includeTargets++ -- Block until relevant change is made then carry on with program execution.+ _ <- checkForChange isDirty++ killThread watchId+ + -- Stop the current app.+ _ <- stopApp runActionsRunResult threadId+ putStrLn "\n\nRebuilding...\n\n"+ build buildFile runFunction isReverseProxy sessionConfig (fromProxyPort, toProxyPort) (Just session) True+++run :: IdeSession -> FilePath -> String -> IO (RunActions RunResult, ThreadId)+run session buildFile runFunction = do+ -- Get the module name from the file path+ mapFunction <- getFileMap session+ buildModule <- case mapFunction buildFile of+ Nothing -> fail $ "The file's module name for: " ++ show buildFile ++" couldn't be found"+ Just moduleId -> return $ unpack $ moduleName moduleId++ -- Run the given ide-backend session.+ runActionsRunResult <- runStmt session buildModule runFunction+ threadId <- forkIO $ loop runActionsRunResult++ return (runActionsRunResult, threadId)+ ++-- | Stop the currently running WAI application.+stopApp :: RunActions RunResult -> ThreadId -> IO ()+stopApp runResult threadId = do+ interrupt runResult+ killThread threadId+++-- | Run for as long as we need to.+loop :: RunActions RunResult -> IO ()+loop res = do+ runAction <- runWait res+ case runAction of+ Left bs -> S8.putStr bs >> loop res+ Right result -> putStrLn $ "Run result: " ++ show result+
+ src/Devel/CmdArgs.hs view
@@ -0,0 +1,43 @@+{-|+Module : Devel.Args+Description : For handling command line arguments.+Copyright : (c)+License : GPL-3+Maintainer : njagi@urbanslug.com+Stability : experimental+Portability : POSIX+-}+module Devel.CmdArgs+( cmdArgs+, CmdArgs (..)+) where++import Options.Applicative++-- | Command line arguments for yesod devel.+-- All arguments are optional.+data CmdArgs = CmdArgs+ { buildFile :: FilePath+ , runFunction :: String+ , isReverseProxy :: Bool -- By default reverse proxy should be True + } deriving (Show, Eq)++cmdArgs :: Parser CmdArgs+cmdArgs = CmdArgs+ <$> strOption+ (long "path"+ <> short 'p'+ <> value "Application.hs"+ <> metavar "FILEPATH"+ <> help "The file with the function you want to run. Default is `Application.hs`.")+ <*> strOption+ (long "function"+ <> short 'f'+ <> value "develMain"+ <> metavar "FUNCTION"+ <> help "The function you want run. Default is `develMain`.")+ <*> flag True False+ (long "no-reverse-proxy"+ <> short 'r'+ <> help "use `-r` to disable reverse proxying." )+
+ src/Devel/Compile.hs view
@@ -0,0 +1,198 @@+{-|+Module : Devel.Compile+Description : Attempts to compile the WAI application.+Copyright : (c)+License : GPL-3+Maintainer : njagi@urbanslug.com+Stability : experimental+Portability : POSIX++Compile compiles the app to give:+Either a list of source errors or an ide-backend session.+-}++{-# LANGUAGE OverloadedStrings #-}++module Devel.Compile +( initCompile+, compile+, finishCompile+) where+++-- The backbone library of ide-backend.+-- Almost everything is dependent on ide-backend.+import IdeSession++-- From Cabal-ide-backend+-- for parsing the cabal file and extracting lang extensions used.+import Distribution.PackageDescription+import Distribution.ModuleName+import Distribution.PackageDescription.Parse+import Distribution.PackageDescription.Configuration+import Language.Haskell.Extension++-- Used internally for showing errors.+import Data.Text (unpack)++-- Utility functions+import Data.Monoid ((<>))++-- Local imports+import Devel.Paths+import Devel.Types++import System.FilePath.Posix (takeExtension, pathSeparator)+import System.Directory (doesFileExist)+import Data.List (union, delete, isInfixOf, nub)+import Data.Maybe (fromMaybe)+import Control.Monad (filterM)++-- |Initialize the compilation process.+initCompile :: SessionConfig -> Maybe IdeSession -> IO (IdeSession, [GhcExtension], [FilePath])+initCompile sessionConfig mSession = do+ -- Initialize the session+ session <- case mSession of+ Just session -> return session+ Nothing -> initSession+ defaultSessionInitParams+ sessionConfig++ -- This is "rebuilding" the cabal file.+ (extensionList, srcDir, cabalSrcList) <- getExtensions+ sourceList <- getSourceList srcDir cabalSrcList+ return (session, extensionList, sourceList)++getSourceList :: [FilePath] -> [FilePath] -> IO [FilePath]+getSourceList srcDir cabalSrcList = do++ fileList' <- mapM getRecursiveContents srcDir++ let -- Remove duplicate values. + fileList = foldr union [] fileList'+ -- Remove files in test dir.++ fileListNoTests = filter (not.(\x -> isInfixOf "test/" x || isInfixOf "cabal-sandbox/" x || isInfixOf "stack-work/" x)) fileList++ -- Add both lists together.+ fileListCombined = fileListNoTests ++ cabalSrcList++ -- Remove all non hs and non .lhs files.+ -- also remove "app/devel.hs" because it has an extra main function+ sourceList' = filter + (\f -> let ext = takeExtension f in ext == ".lhs" || ext == ".hs") + fileListCombined+ -- nub to remove duplicates yet again.+ sourceList = nub $ delete "app/DevelMain.hs" $ delete "app/devel.hs" sourceList'+++ return sourceList+++-- | Contains code regarding target files and coming up with the IdeSession update.+compile :: IdeSession -> FilePath -> [GhcExtension] -> [FilePath] -> IO (IdeSession, IdeSessionUpdate)+compile session buildFile extensionList sourceList = do++ -- Description of session updates.+ let targetList = TargetsInclude (if buildFile `elem` sourceList+ then sourceList+ else buildFile : sourceList) :: Targets+ update = updateTargets targetList+ <> updateCodeGeneration True+ <> updateGhcOpts (["-Wall", "-ddump-hi", "-ddump-to-file"] ++ extensionList)++ return (session, update)+++-- |The final part of the compilation process.+finishCompile :: (IdeSession, IdeSessionUpdate) -> IO (Either [SourceError'] IdeSession)+finishCompile (session, update) = do+ _ <- updateSession session update print++ -- Customizing error showing.+ errorList' <- getSourceErrors session+ let errorList = case filterErrors errorList' of+ [] -> []+ _ -> prettyPrintErrors errorList'++ -- We still want to see errors and warnings on the terminal.+ mapM_ putStrLn $ prettyPrintErrors errorList'++ return $ case errorList of+ [] -> Right session+ _ -> Left errorList+++-- -----------------------------------------------------------+-- Utility functions.+-- -----------------------------------------------------------++-- | Parse the cabal file to get the ghc extensions in use.+getExtensions :: IO ([GhcExtension], [FilePath], [FilePath])+getExtensions = do + cabalFilePath <- getCabalFile+ cabalFile <- readFile cabalFilePath++ let unsafePackageDescription = parsePackageDescription cabalFile++ genericPackageDescription = case unsafePackageDescription of+ ParseOk _ a -> a+ _ -> error "failed package description."++ packDescription = flattenPackageDescription genericPackageDescription++ rawExt = usedExtensions $ head $ allBuildInfo packDescription++ lib = fromMaybe emptyLibrary $ library packDescription++ -- I think it would be wise to avoid src files under executable to avoid conflict.+ srcDir = hsSourceDirs $ libBuildInfo lib+ srcList = extraSrcFiles packDescription+++ parseExtension :: Extension -> String+ parseExtension (EnableExtension extension) = "-X" ++ show extension+ parseExtension (DisableExtension extension) = "-XNo" ++ show extension+ parseExtension (UnknownExtension extension) = "-X" ++ show extension++ extensions = map parseExtension rawExt++ -- Now we handle source files from executable section here.+ execList = executables packDescription+ + paths <- mapM getPathList execList ++ return (extensions, srcDir, (srcList ++ (concat paths)))+ where + getPathList :: Executable -> IO [FilePath]+ getPathList exec =+ let mainModule' = modulePath exec+ bInfo = buildInfo exec+ execModuleList = otherModules bInfo+ srcDirsList = hsSourceDirs bInfo+ execSrcFileList = map toFilePath execModuleList+ nonPaths = [dir ++ (pathSeparator : fp) | fp <- execSrcFileList, dir <- srcDirsList]+ paths' = map (++ (pathSeparator : mainModule') ) srcDirsList -- For the main module+ ++ [x++y | x <- nonPaths, y <- [".hs", ".lhs"]]++ in filterM doesFileExist paths'++++-- | Remove the warnings from [SourceError] if any.+-- Return an empty list if there are no errors and only warnings+-- Return non empty list if there are errors.+filterErrors :: [SourceError] -> [SourceError]+filterErrors [] = []+filterErrors (x:xs) = + case errorKind x of+ KindWarning -> filterErrors xs+ _ -> x : filterErrors xs++prettyPrintErrors :: [SourceError] -> [SourceError']+prettyPrintErrors [] = []+prettyPrintErrors (x: xs) = + case errorKind x of+ KindWarning -> ("Warning: " ++ show (errorSpan x) ++ " " ++ unpack (errorMsg x)) : prettyPrintErrors xs+ KindError -> ("Error: " ++ show (errorSpan x) ++ " " ++ unpack (errorMsg x)) : prettyPrintErrors xs+ KindServerDied -> show (errorKind x) : prettyPrintErrors xs
+ src/Devel/Config.hs view
@@ -0,0 +1,122 @@+{-|+Module : Devel.Config+Description : To have wai-devel depend on it's environment a lot less.+Copyright : (c)+License : GPL-3+Maintainer : njagi@urbanslug.com+Stability : experimental+Portability : POSIX++Currently we'll query for this information from the stack binary.++Ideal case it to use the stack library to figure out depends and stuff.+Depending on the stack library causes a breakage in the dependecy tree.+As of now I can't find a single function (or set of functions) that fetches this information from stack.+Closest thing is in the stack Main module.+ +Will be rewritten to depend on the stack library.+-}+{-# LANGUAGE ScopedTypeVariables #-}++module Devel.Config +( setConfig+, getPath+, getPkgDb+) where++import System.Process (readProcessWithExitCode)+import System.Environment (unsetEnv, setEnv, lookupEnv)+import Control.Exception (catch)++import System.FilePath.Posix (pathSeparator)+import System.Directory (getCurrentDirectory, getHomeDirectory, doesDirectoryExist)+import System.Info (arch, compilerName, os)++import Devel.Types++setConfig :: IO ()+setConfig = do+ (path, pkgDb) <- getConfig+ _ <- unsetEnv "PATH"+ _ <- unsetEnv "GHC_PACKAGE_PATH"+ _ <- setEnv "PATH" path+ setEnv "GHC_PACKAGE_PATH" pkgDb+ ++getConfig :: IO Config+getConfig = do+ -- If stack isn't installed use cabal-install.+ catch getStackConfig getCabalConfig+ where + getStackConfig :: IO Config+ getStackConfig = do + (_, stdout, _) <- readProcessWithExitCode "stack" ["path"] ""+ parseConfig stdout+++ parseConfig :: String -> IO Config+ parseConfig stdout = do+ let outputList = lines stdout+ tupleList = map (span (/=':') ) outputList+ path = concatMap getPath tupleList+ pkgDb = concatMap getPkgDb tupleList+ return (path, pkgDb)++getCabalConfig :: IOError -> IO Config+getCabalConfig _ = do+ mPath <- lookupEnv "PATH"+ mPkgDb <- lookupEnv "GHC_PACKAGE_PATH"+ + ghcVersion <- catch getGhcVersion getGhcVersionError+ + cwd <- getCurrentDirectory+ homeDir <- getHomeDirectory+ isSandBoxed <- doesDirectoryExist ".cabal-sandbox"+ + let compilerVersion' = last $ words ghcVersion+ forSandboxPath = arch ++ "-" ++ os ++ "-" ++ compilerName ++ "-" ++ compilerVersion'+ forUserPath = arch ++ "-" ++ os ++ "-" ++ compilerVersion'+ forGlobalPath = compilerName ++ "-" ++ compilerVersion'+++ sandboxPkgDb = if isSandBoxed+ then cwd ++ (pathSeparator : ".cabal-sandbox") + ++ (pathSeparator : forSandboxPath) ++ "-packages.conf.d:"+ else "" -- We're not using a sandbox.++ userPkgDb = homeDir ++ (pathSeparator: ".ghc") ++ (pathSeparator:forUserPath) + ++ (pathSeparator:"package.conf.d:")+ globalPkgDb = "/usr/lib/" ++ forGlobalPath ++"/package.conf.d:"++ pkgDb' = sandboxPkgDb ++ userPkgDb ++ globalPkgDb++ path = case mPath of+ Just p -> p+ Nothing -> fail "The environment variable PATH isn't set."+ pkgDb = case mPkgDb of+ Just db -> db+ Nothing -> pkgDb'++ return (path, pkgDb)++getGhcVersion :: IO String+getGhcVersion = do+ (_, stdout, _) <- readProcessWithExitCode "ghc" ["--version"] ""+ return stdout++-- Give proper fail information.+getGhcVersionError :: IOError -> IO String+getGhcVersionError _ = do+ fail $ "Is GHC not in your PATH? "+ ++ "Because wai-devel can't get the version number from: "+ ++ "`ghc --version`"++getPath :: (String, String) -> String+getPath (key,value)+ | key == "bin-path" = dropWhile (==':') $ filter (/=' ') value+ | otherwise = ""++getPkgDb :: (String, String) -> String+getPkgDb (key,value)+ | key == "ghc-package-path" = dropWhile (==':') $ filter (/=' ') value+ | otherwise = ""
+ src/Devel/Modules.hs view
@@ -0,0 +1,37 @@+{-|+Module : Devel.Modules+Description : For handling modules and Filepath matters.+Copyright : (c)+License : GPL-3+Maintainer : njagi@urbanslug.com+Stability : experimental+Portability : POSIX++Resolve filepaths from module names.+-}++{-# LANGUAGE PackageImports #-}++module Devel.Modules (getCompiledFiles) where++import IdeSession+import System.FilePath (pathSeparator)+import Data.Text (unpack)+import Data.String.Utils+import System.Directory (getCurrentDirectory)++-- | Paths without extensions.+-- Uncomment for absolute paths.+getCompiledFiles :: IdeSession -> IO [FilePath]+getCompiledFiles session = do++ moduleList <- getLoadedModules session+ dir <- getCurrentDirectory++ let toFilePath :: ModuleName -> FilePath -- A.B.C = A/B/C+ toFilePath moduleName' = replace "." [pathSeparator] $ unpack moduleName'+ absPaths = map (((dir ++ "/") ++) . toFilePath) moduleList++ -- We use absolute paths because when we match them against dir contents we use absolute paths.+ -- or the result of Devel.Paths.getRecursiveContents+ return absPaths
+ src/Devel/Paths.hs view
@@ -0,0 +1,107 @@+{-|+Module : Devel.Paths+Description : For filepath related matters.+Copyright : (c)+License : GPL-3+Maintainer : njagi@urbanslug.com+Stability : experimental+Portability : POSIX++Uses the GHC package to parse .hi files.+Will hopefully be moved upstream to ide-backend.+-}++{-# LANGUAGE OverloadedStrings #-}+{-# LANGUAGE PackageImports #-}++module Devel.Paths +( getFilesToWatch+, getThFiles+, getCabalFile+, getRecursiveContents+-- , getRecursiveContentsRelative+) where++-- Qualified imports+import qualified Data.ByteString.Char8 as C8++import "Glob" System.FilePath.Glob (globDir, compile, Pattern, glob)+import System.FilePath.Posix (replaceExtension)+import System.Directory (doesFileExist, removeFile, getDirectoryContents, doesDirectoryExist)+import System.FilePath ((</>))+import Control.Monad.IO.Class (liftIO)+import Control.Monad (forM,filterM)+import Data.List ((\\))+++getThFiles :: [FilePath] -> IO [FilePath]+getThFiles targetList = do + let dumpFiles' = map (`replaceExtension` "dump-hi") targetList+ dumpFiles <- filterM doesFileExist dumpFiles'+ thFiles' <- mapM parseHi dumpFiles+ let thFiles = map (takeWhile (/='\"') . dropWhile (=='\"') . dropWhile (/='\"')) $ concat thFiles'++ _ <- mapM removeFile dumpFiles+ return thFiles++getFilesToWatch :: [FilePath] -> IO [FilePath]+getFilesToWatch targetList = do+ thFiles <- getThFiles targetList+ return $ thFiles ++ targetList++++parseHi :: FilePath -> IO [FilePath]+parseHi path = do+ dumpHI <- liftIO $ fmap C8.lines (C8.readFile path)+ let thDeps' =+ -- The dependent file path is surrounded by quotes but is not escaped.+ -- It can be an absolute or relative path.+ filter ("addDependentFile \"" `C8.isPrefixOf`) dumpHI+ return $ map C8.unpack thDeps'++++getRecursiveContents :: FilePath -> IO [FilePath]+getRecursiveContents topdir = do+ names <- getDirectoryContents topdir++ -- We want to take these files out.+ let patterns :: [Pattern]+ patterns = [ (compile "*.*~")+ , (compile "*.hi")+ , (compile "*.dump-hi")+ , (compile "*.o")+ , (compile "*.dyn_o")+ , (compile "*.dyn_hi")+ , (compile "*.so")+ , (compile "*.conf")+ , (compile "*.h")+ , (compile "*.a")+ , (compile "*.inplace")+ , (compile "*.cache")+ , (compile "*.*.el")+ , (compile ".*")+ ]+ (x, _) <- globDir patterns topdir++ let properNames = filter (`notElem` [".", ".."]) names+ paths <- forM properNames $ \name -> do+ let path = makePathRelative topdir </> name+ isDirectory <- doesDirectoryExist path+ if isDirectory+ then getRecursiveContents path+ else return $ [path] \\ concat x+ return (concat paths)+ where makePathRelative :: FilePath -> FilePath+ makePathRelative topDir + | topDir == "." = ""+ | otherwise = topDir+++getCabalFile :: IO FilePath+getCabalFile = do+ list <- glob "*cabal"+ case list of+ [] -> fail "No cabal file."+ (cabalFile:_) -> return cabalFile
+ src/Devel/ReverseProxy.hs view
@@ -0,0 +1,92 @@+{-|+Module : Devel.ReverseProxy+Description : Reverse proxies and starts warp on localhost:\<PORT\>.+Copyright : (c)+License : GPL-3+Maintainer : njagi@urbanslug.com+Stability : experimental+Portability : POSIX++Reverse proxying and other socket realated activities.+-}+{-# LANGUAGE OverloadedStrings, ScopedTypeVariables, TemplateHaskell #-}+module Devel.ReverseProxy +( startReverseProxy+, createSocket+, createSocketSafe+, checkPort+, cyclePorts+) where++import Network.HTTP.ReverseProxy (WaiProxyResponse(WPRProxyDest), ProxyDest(ProxyDest), waiProxyTo)+import Network.HTTP.Client (newManager, defaultManagerSettings)+import Network.HTTP.Types (status200)++-- import Network.Wai.Handler.Warp (runSettingsSocket, defaultSettings, run)+import Network.Wai.Handler.Warp (run)+import Control.Exception++import Network.Socket+import Data.Streaming.Network (bindPortTCP)++import qualified Data.ByteString.Lazy as LB+import Data.FileEmbed (embedFile)+import Network.Wai (Application, responseLBS)++++startReverseProxy :: (Int, Int) -> IO ()+startReverseProxy (fromProxyPort, toProxyPort) = do+ mgr <- newManager defaultManagerSettings++ let onException' :: SomeException -> Application+ onException' _ _ respond = do+ let refreshHtml = LB.fromChunks $ return $(embedFile "refreshing.html")+ respond $ responseLBS status200+ [ ("content-type", "text/html")+ , ("Refresh", "1")+ ]+ refreshHtml++ let proxyApp = waiProxyTo+ (\_ -> return $ WPRProxyDest $ ProxyDest "0.0.0.0" toProxyPort)+ onException'+ mgr++ -- runSettingsSocket defaultSettings sock proxyApp+ run fromProxyPort proxyApp+++createSocketSafe :: Int -> IO (Socket, Int)+createSocketSafe port' = do+ port <- cyclePorts port'+ sock <- createSocket port+ return (sock, port)++createSocket :: Int -> IO Socket+createSocket port = do+ sock <- bindPortTCP port "*4"++ -- Tell the OS *not* to reserve the socket after your program exits.+ setSocketOption sock ReuseAddr 1++ return sock+++-- Check whether a port is available to bind to.+checkPort :: Int -> IO Bool+checkPort port = do+ es <- try $ bindPortTCP port "*4"+ case es of+ Left (_ :: IOException) -> return False+ Right s -> do+ sClose s+ return True++cyclePorts :: Int -> IO Int+cyclePorts p = do+ let port = p + 1+ portAvailable <- checkPort port+ case portAvailable of+ True -> return port+ _ -> cyclePorts port
+ src/Devel/Types.hs view
@@ -0,0 +1,31 @@+{-|+Module : Devel.Build+Description : Attempts to compile the WAI application.+Copyright : (c)+License : GPL-3+Maintainer : njagi@urbanslug.com+Stability : experimental+Portability : POSIX++compile compiles the app to give:+Either a list of source errors or an ide-backend session.+-}++module Devel.Types where++type SourceError' = String++type GhcExtension = String++data FileChange = + Addition FilePath+ | Modification FilePath+ | Removal FilePath+ | NoChange+ deriving (Show, Eq)++type PATH = String++type PACKAGEDB = String++type Config = (PATH, PACKAGEDB)
+ src/Devel/Watch.hs view
@@ -0,0 +1,79 @@+{-|+Module : Devel.Watch+Description : Watch for changes in the current working direcory.+Copyright : (c)+License : GPL-3+Maintainer : njagi@urbanslug.com+Stability : experimental+Portability : POSIX++Actually checks only for modified files.+Added or removed files don't trigger new builds.+-}+{-# LANGUAGE OverloadedStrings, CPP #-}+module Devel.Watch where++-- import IdeSession++import Control.Monad.STM+import Control.Concurrent.STM.TVar++import System.FSNotify+import Control.Monad (forever)+import Control.Concurrent (threadDelay)++-- import Devel.Types+-- import Devel.Paths (getFilesToWatch)++# if __GLASGOW_HASKELL__ < 710+import Data.Text (unpack)+import Filesystem.Path.CurrentOS (toText)+-- import qualified Filesystem.Path as FSP+#endif++import System.Directory (getCurrentDirectory)+import System.FilePath (pathSeparator)++import Devel.Paths++watch :: TVar Bool -> [FilePath] -> IO ()+watch isDirty includeTargets = do+ -- Get files to watch.+ files <- getFilesToWatch includeTargets+ -- Making paths to watch a list of absolute paths.+ dir <- getCurrentDirectory+ let pathsToWatch = map (\fp -> dir ++ (pathSeparator: fp)) files++ -- Actual file watching.+ manager <- startManagerConf defaultConfig+ _ <- watchTree manager "." (const True)+ -- Last argument to watchTree.+# if __GLASGOW_HASKELL__ >= 710+ (\event -> do+ let getPath :: Event -> FilePath+ getPath (Added fp _) = fp+ getPath (Modified fp _) = fp+ getPath (Removed fp _) = fp+ + isModified = getPath event `elem` pathsToWatch+ + atomically $ writeTVar isDirty isModified)+ +#else+ (\event -> do + pathMod' <- case toText $ eventPath event of+ Right text -> return $ unpack text -- Gives an abs path+ Left text -> fail $ unpack text+ + let isModified = pathMod' `elem` pathsToWatch+ + atomically $ writeTVar isDirty isModified)+#endif++ _ <- forever $ threadDelay maxBound+ stopManager manager++checkForChange :: TVar Bool -> IO ()+checkForChange isDirty =+ atomically $ do readTVar isDirty >>= check+ writeTVar isDirty False
+ src/Main.hs view
@@ -0,0 +1,29 @@+{-|+Module : Main+Description : The main module of the executable.+Copyright : (c)+License : GPL-3+Maintainer : njagi@urbanslug.com+Stability : experimental+Portability : POSIX+-}+module Main where++import Devel+import Devel.CmdArgs+import Options.Applicative++main :: IO ()+main = do+ cmdArgs' <- execParser opts++ let isReverseProxy' = isReverseProxy cmdArgs'+ buildFile' = buildFile cmdArgs'+ runFunction' = runFunction cmdArgs'++ buildAndRun buildFile' runFunction' isReverseProxy'+ where opts :: ParserInfo CmdArgs+ opts = info (helper <*> cmdArgs)+ (fullDesc+ <> progDesc "For WAI complaint haskell web applications"+ <> header "wai-devel: development server for haskell web applications." )
+ tests/Spec.hs view
@@ -0,0 +1,1 @@+{-# OPTIONS_GHC -F -pgmF hspec-discover #-}
+ wai-devel.cabal view
@@ -0,0 +1,124 @@+name: wai-devel+version: 0.0.0.1+synopsis: A web server for the development of WAI compliant web applications.+description: A development server for WAI applications.+homepage: https://github.com/urbanslug/wai-devel+license: GPL-3+license-file: LICENSE+author: Njagi Mwaniki+maintainer: njagi@urbanslug.com+-- copyright: +category: Web+build-type: Simple+-- extra-source-files: +cabal-version: >=1.10++library+ ghc-options: -Wall+ exposed-modules: Devel+ , Main+ , Devel.Watch+ , Devel.CmdArgs+ , Devel.ReverseProxy+ , Devel.Config+ , Devel.Compile+ , Devel.Types+ , Devel.Build+ other-modules: Devel.Paths+ , Devel.Modules++ -- other-extensions:+ build-depends: base >= 4.7 && <5.0+ , Cabal-ide-backend >= 1.23 && < 1.24+ , Glob >= 0.7 && < 0.8+ , MissingH >= 1.3 && < 1.4+ , array >= 0.5 && < 0.6+ , blaze-html >= 0.8 && < 0.9+ , bytestring >= 0.10 && < 0.11+ , directory >= 1.2 && < 1.3+ , filepath >= 1.3 && < 1.5+ , fsnotify >= 0.1 && < 0.3+ , ghc >= 7.8 && < 7.12+ , http-client >= 0.4 && < 0.5+ , http-conduit >= 2.1 && < 2.2+ , http-reverse-proxy >= 0.4 && < 0.5+ , http-types >= 0.8 && < 0.9+ , ide-backend >= 0.10 && < 0.11+ , network >= 2.6 && < 2.7+ , optparse-applicative >= 0.11 && < 0.12+ , process >= 1.2 && < 1.3+ , shakespeare >= 2.0 && < 2.1+ , stm >= 2.4 && < 2.5+ , streaming-commons >= 0.1 && < 0.2+ , system-filepath >= 0.4 && < 0.5+ , text >= 1.2 && < 1.3+ , time >= 1.4 && < 1.6+ , transformers >= 0.3 && < 0.5+ , wai >= 3.0 && < 3.1+ , warp >= 3.0 && < 3.2+ , file-embed >= 0.0 && < 0.1+ , websockets >= 0.9 && < 1.1++ hs-source-dirs: src+ default-language: Haskell2010++executable wai-devel+ ghc-options: -Wall+ main-is: Main.hs+ other-modules: Devel+ Devel.CmdArgs+ Devel.Build+ Devel.Compile+ Devel.Config+ Devel.Modules+ Devel.Paths+ Devel.ReverseProxy+ Devel.Types+ Devel.Watch+ -- other-extensions:+ build-depends: base+ , Cabal-ide-backend+ , Glob+ , MissingH+ , blaze-html+ , bytestring+ , directory+ , filepath+ , fsnotify+ , ghc+ , http-client+ , http-conduit+ , http-reverse-proxy+ , http-types+ , ide-backend+ , network+ , optparse-applicative+ , process+ , shakespeare+ , stm+ , streaming-commons+ , system-filepath+ , text+ , time+ , transformers+ , wai+ , wai-devel+ , warp+ , file-embed+ , websockets++ hs-source-dirs: src+ default-language: Haskell2010++test-suite tests+ ghc-options: -Wall+ type: exitcode-stdio-1.0+ main-is: Spec.hs+ -- exposed-modules: + -- other-modules: Tests.Watch+ hs-source-dirs: tests+ build-depends: base+ , hspec >= 2.1 && < 3.0+ , stm+ , wai-devel+ default-language: Haskell2010