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|
#!/usr/bin/env runhaskell
{-# LANGUAGE CPP #-}
{-# LANGUAGE RecordWildCards #-}
import Control.Monad
import Data.Maybe
import Distribution.Simple.Utils
import Distribution.Verbosity
import System.Console.GetOpt
import System.Directory
import System.Environment
import System.Exit
import System.FilePath
import System.IO
import System.Process
baseDir, rootDir :: FilePath
baseDir = takeDirectory __FILE__
rootDir = baseDir </> ".."
srcDir, refDir, outDir :: FilePath
srcDir = baseDir </> "src"
refDir = baseDir </> "ref"
outDir = baseDir </> "out"
resDir :: FilePath
resDir = rootDir </> "resources"
data Config = Config
{ cfgHaddockPath :: FilePath
, cfgGhcPath :: FilePath
, cfgFiles :: [FilePath]
}
main :: IO ()
main = do
Config { .. } <- loadConfig =<< getArgs
return ()
loadConfig :: [String] -> IO Config
loadConfig args = do
let (flags, files, errors) = getOpt Permute options args
when (not $ null errors) $ do
hPutStr stderr $ concat errors
exitFailure
when (FlagHelp `elem` flags) $ do
hPutStrLn stderr $ usageInfo "" options
exitSuccess
env <- Just . (:) ("haddock_datadir", resDir) <$> getEnvironment
cfgHaddockPath <- pure $ flip fromMaybe (flagsHaddockPath flags) $
rootDir </> "dist" </> "build" </> "haddock" </> "haddock"
printVersions env cfgHaddockPath
cfgGhcPath <- flip fromMaybe (flagsGhcPath flags) <$>
init <$> rawSystemStdout normal cfgHaddockPath ["--print-ghc-path"]
cfgFiles <- processFileArgs files
return $ Config { .. }
printVersions :: Maybe [(String, String)] -> FilePath -> IO ()
printVersions env haddockPath = do
handle <- runProcess' haddockPath $ processConfig
{ pcEnv = env
, pcArgs = ["--version"]
}
waitForSuccess "Failed to run `haddock --version`" handle
handle <- runProcess' haddockPath $ processConfig
{ pcEnv = env
, pcArgs = ["--ghc-version"]
}
waitForSuccess "Failed to run `haddock --ghc-version`" handle
processFileArgs :: [String] -> IO [FilePath]
processFileArgs [] = filter isSourceFile <$> getDirectoryContents srcDir
processFileArgs args = pure $ map processFileArg args
processFileArg :: String -> FilePath
processFileArg arg
| isSourceFile arg = arg
| otherwise = srcDir </> arg <.> "hs"
isSourceFile :: FilePath -> Bool
isSourceFile path = takeExtension path `elem` [".hs", ".lhs"]
data Flag
= FlagHaddockPath FilePath
| FlagGhcPath FilePath
| FlagHelp
deriving Eq
options :: [OptDescr Flag]
options =
[ Option [] ["haddock-path"] (ReqArg FlagHaddockPath "FILE")
"path to Haddock executable to exectue tests with"
, Option [] ["ghc-path"] (ReqArg FlagGhcPath "FILE")
"path to GHC executable"
, Option ['h'] ["help"] (NoArg FlagHelp)
"display this help end exit"
]
flagsHaddockPath :: [Flag] -> Maybe FilePath
flagsHaddockPath flags = mlast [ path | FlagHaddockPath path <- flags ]
flagsGhcPath :: [Flag] -> Maybe FilePath
flagsGhcPath flags = mlast [ path | FlagGhcPath path <- flags ]
data ProcessConfig = ProcessConfig
{ pcArgs :: [String]
, pcWorkDir :: Maybe FilePath
, pcEnv :: Maybe [(String, String)]
, pcStdIn :: Maybe Handle
, pcStdOut :: Maybe Handle
, pcStdErr :: Maybe Handle
}
processConfig :: ProcessConfig
processConfig = ProcessConfig
{ pcArgs = []
, pcWorkDir = Nothing
, pcEnv = Nothing
, pcStdIn = Nothing
, pcStdOut = Nothing
, pcStdErr = Nothing
}
runProcess' :: FilePath -> ProcessConfig -> IO ProcessHandle
runProcess' path (ProcessConfig { .. }) = runProcess
path pcArgs pcWorkDir pcEnv pcStdIn pcStdOut pcStdErr
waitForSuccess :: String -> ProcessHandle -> IO ()
waitForSuccess msg handle = do
result <- waitForProcess handle
unless (result == ExitSuccess) $ do
hPutStrLn stderr $ msg
exitFailure
mlast :: [a] -> Maybe a
mlast = listToMaybe . reverse
|
