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Copyright (C) 2008 John MacFarlane <>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
module Main where
import Network.Gitit
import Network.Gitit.Server
import Network.Gitit.Util (readFileUTF8)
import System.Directory
import Data.Maybe (isNothing)
import Control.Monad.Error()
import Control.Monad.Reader
import System.Log.Logger (Priority(..), setLevel, setHandlers,
getLogger, saveGlobalLogger)
import System.Log.Handler.Simple (fileHandler)
import System.Environment
import System.Exit
import System.IO (stderr)
import System.Console.GetOpt
import Network.Socket hiding (Debug)
import Data.Version (showVersion)
import qualified Data.ByteString.Char8 as B
import Data.ByteString.UTF8 (fromString)
import Paths_gitit (version, getDataFileName)
main :: IO ()
main = do
-- parse options to get config file
args <- getArgs >>= parseArgs
-- sequence in Either monad gets first Left or all Rights
opts <- case sequence args of
Left Help -> putErr ExitSuccess =<< usageMessage
Left Version -> do
progname <- getProgName
putErr ExitSuccess (progname ++ " version " ++
showVersion version ++ compileInfo ++ copyrightMessage)
Left PrintDefaultConfig -> getDataFileName "data/default.conf" >>=
readFileUTF8 >>= B.putStrLn . fromString >> exitWith ExitSuccess
Right xs -> return xs
conf' <- case [f | ConfigFile f <- opts] of
(x:_) -> getConfigFromFile x
[] -> getDefaultConfig
let conf = foldl handleFlag conf' opts
-- check for external programs that are needed
let repoProg = case repositoryType conf of
Mercurial -> "hg"
Darcs -> "darcs"
Git -> "git"
let prereqs = ["grep", repoProg]
forM_ prereqs $ \prog ->
findExecutable prog >>= \mbFind ->
when (isNothing mbFind) $ error $
"Required program '" ++ prog ++ "' not found in system path."
-- set up logging
let level = if debugMode conf then DEBUG else logLevel conf
logFileHandler <- fileHandler (logFile conf) level
serverLogger <- getLogger "Happstack.Server.AccessLog.Combined"
gititLogger <- getLogger "gitit"
saveGlobalLogger $ setLevel level $ setHandlers [logFileHandler] serverLogger
saveGlobalLogger $ setLevel level $ setHandlers [logFileHandler] gititLogger
-- setup the page repository, template, and static files, if they don't exist
createRepoIfMissing conf
createStaticIfMissing conf
createTemplateIfMissing conf
-- initialize state
initializeGititState conf
let serverConf = nullConf { validator = Nothing, port = portNumber conf,
timeout = 20, logAccess = Nothing }
-- open the requested interface
sock <- socket AF_INET Stream defaultProtocol
setSocketOption sock ReuseAddr 1
device <- inet_addr (address conf)
bindSocket sock (SockAddrInet (toEnum (portNumber conf)) device)
listen sock 10
-- start the server
simpleHTTPWithSocket sock serverConf $ msum [ wiki conf
, dir "_reloadTemplates" reloadTemplates
data ExitOpt
= Help
| Version
| PrintDefaultConfig
data ConfigOpt
= ConfigFile FilePath
| Port Int
| Listen String
| Debug
deriving (Eq)
type Opt = Either ExitOpt ConfigOpt
flags :: [OptDescr Opt]
flags =
[ Option ['h'] ["help"] (NoArg (Left Help))
"Print this help message"
, Option ['v'] ["version"] (NoArg (Left Version))
"Print version information"
, Option ['p'] ["port"] (ReqArg (Right . Port . read) "PORT")
"Specify port"
, Option ['l'] ["listen"] (ReqArg (Right . Listen) "INTERFACE")
"Specify IP address to listen on"
, Option [] ["print-default-config"] (NoArg (Left PrintDefaultConfig))
"Print default configuration"
, Option [] ["debug"] (NoArg (Right Debug))
"Print debugging information on each request"
, Option ['f'] ["config-file"] (ReqArg (Right . ConfigFile) "FILE")
"Specify configuration file"
parseArgs :: [String] -> IO [Opt]
parseArgs argv = do
case getOpt Permute flags argv of
(opts,_,[]) -> return opts
(_,_,errs) -> putErr (ExitFailure 1) . (concat errs ++) =<< usageMessage
usageMessage :: IO String
usageMessage = do
progname <- getProgName
return $ usageInfo ("Usage: " ++ progname ++ " [opts...]") flags
copyrightMessage :: String
copyrightMessage = "\nCopyright (C) 2008 John MacFarlane\n" ++
"This is free software; see the source for copying conditions. There is no\n" ++
"warranty, not even for merchantability or fitness for a particular purpose."
compileInfo :: String
compileInfo =
#ifdef _PLUGINS
" +plugins"
" -plugins"
handleFlag :: Config -> ConfigOpt -> Config
handleFlag conf Debug = conf{ debugMode = True, logLevel = DEBUG }
handleFlag conf (Port p) = conf { portNumber = p }
handleFlag conf (Listen l) = conf { address = l }
handleFlag conf _ = conf
putErr :: ExitCode -> String -> IO a
putErr c s = B.hPutStrLn stderr (fromString s) >> exitWith c
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