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|
-- copyright (c) 2008 Duncan Coutts
-- portions copyright (c) 2008 David Roundy
-- portions copyright (c) 2007-2009 Judah Jacobson
{-# OPTIONS_GHC -Wall #-}
import Distribution.Simple
( defaultMainWithHooks, UserHooks(..), simpleUserHooks )
import Distribution.PackageDescription ( PackageDescription )
import Distribution.Package ( packageVersion )
import Distribution.Version( Version )
import Distribution.Simple.LocalBuildInfo
( LocalBuildInfo(..), absoluteInstallDirs )
import Distribution.Simple.InstallDirs (mandir, CopyDest (NoCopyDest))
import Distribution.Simple.Setup
(buildVerbosity, copyDest, copyVerbosity, fromFlag,
haddockVerbosity, installVerbosity, replVerbosity )
import Distribution.Simple.BuildPaths ( autogenPackageModulesDir )
import Distribution.Simple.Utils
(copyFiles, createDirectoryIfMissingVerbose, rawSystemStdout,
rewriteFileEx)
import Distribution.Verbosity ( Verbosity, silent )
import Distribution.Text ( display )
import Control.Monad ( unless, when, void )
import System.Directory ( doesDirectoryExist, doesFileExist )
import System.IO ( openFile, IOMode(..) )
import System.Process (callProcess, runProcess)
import Data.List( isInfixOf )
import System.FilePath ( (</>) )
import qualified Control.Exception as Exception
catchAny :: IO a -> (Exception.SomeException -> IO a) -> IO a
catchAny f h = Exception.catch f (\e -> h (e :: Exception.SomeException))
main :: IO ()
main = defaultMainWithHooks $ simpleUserHooks {
buildHook = \ pkg lbi hooks flags ->
let verb = fromFlag $ buildVerbosity flags
in commonBuildHook buildHook pkg lbi hooks verb >>= ($ flags),
haddockHook = \ pkg lbi hooks flags ->
let verb = fromFlag $ haddockVerbosity flags
in commonBuildHook haddockHook pkg lbi hooks verb >>= ($ flags) ,
replHook = \pkg lbi hooks flags args ->
let verb = fromFlag $ replVerbosity flags
in commonBuildHook replHook pkg lbi hooks verb >>= (\f -> f flags args) ,
postBuild = \ _ _ _ lbi -> buildManpage lbi,
postCopy = \ _ flags pkg lbi ->
installManpage pkg lbi (fromFlag $ copyVerbosity flags) (fromFlag $ copyDest flags),
postInst = \ _ flags pkg lbi ->
installManpage pkg lbi (fromFlag $ installVerbosity flags) NoCopyDest
}
-- | For @./Setup build@ and @./Setup haddock@, do some unusual
-- things, then invoke the base behaviour ("simple hook").
commonBuildHook :: (UserHooks -> PackageDescription -> LocalBuildInfo -> t -> a)
-> PackageDescription -> LocalBuildInfo -> t -> Verbosity -> IO a
commonBuildHook runHook pkg lbi hooks verbosity = do
versionInfoExists <-
(&&) <$> doesFileExist "release/distributed-context"
<*> doesFileExist "release/distributed-version"
unless versionInfoExists $
callProcess "cabal" ["run", "./release/gen-version-info.hs"]
(version, state) <- determineVersion verbosity pkg
generateVersionModule verbosity lbi version state
return $ runHook simpleUserHooks pkg lbi hooks
-- ---------------------------------------------------------------------
-- man page
-- ---------------------------------------------------------------------
buildManpage :: LocalBuildInfo -> IO ()
buildManpage lbi = do
have_darcs_exe_dir <- doesDirectoryExist (buildDir lbi </> "darcs")
when have_darcs_exe_dir $ do
let darcs = buildDir lbi </> "darcs/darcs"
manpage = buildDir lbi </> "darcs/darcs.1"
manpageHandle <- openFile manpage WriteMode
void $ runProcess darcs ["help","manpage"]
Nothing Nothing Nothing (Just manpageHandle) Nothing
installManpage :: PackageDescription -> LocalBuildInfo -> Verbosity -> CopyDest -> IO ()
installManpage pkg lbi verbosity copy = do
have_manpage <- doesFileExist (buildDir lbi </> "darcs" </> "darcs.1")
when have_manpage $
copyFiles
verbosity
(mandir (absoluteInstallDirs pkg lbi copy) </> "man1")
[(buildDir lbi </> "darcs", "darcs.1")]
-- ---------------------------------------------------------------------
-- version module
-- ---------------------------------------------------------------------
determineVersion :: Verbosity -> PackageDescription -> IO (String, String)
determineVersion verbosity pkg = do
let darcsVersion = packageVersion pkg
numPatches <- versionPatches verbosity darcsVersion
return (display darcsVersion, versionStateString numPatches)
where
versionStateString :: Maybe Int -> String
versionStateString Nothing = "unknown"
versionStateString (Just 0) = "release"
versionStateString (Just 1) = "+ 1 patch"
versionStateString (Just n) = "+ " ++ show n ++ " patches"
versionPatches :: Verbosity -> Version -> IO (Maybe Int)
versionPatches verbosity darcsVersion = do
numPatchesDarcs <- do
out <- rawSystemStdout verbosity "darcs"
["log", "-a", "--from-tag", display darcsVersion, "--count"]
case reads out of
((n,_):_) -> return $ Just ((n :: Int) - 1)
_ -> return Nothing
`catchAny` \_ -> return Nothing
numPatchesDist <- parseFile "release/distributed-version"
return $ case (numPatchesDarcs, numPatchesDist) of
(Just x, _) -> Just x
(Nothing, Just x) -> Just x
(Nothing, Nothing) -> Nothing
generateVersionModule :: Verbosity -> LocalBuildInfo -> String -> String -> IO ()
generateVersionModule verbosity lbi version state = do
let dir = autogenPackageModulesDir lbi
createDirectoryIfMissingVerbose verbosity True dir
ctx <- context verbosity
hash <- weakhash verbosity
rewriteFileEx silent (dir </> "Version.hs") $ unlines
["module Version where"
,"import Darcs.Prelude"
,"version, weakhash, context :: String"
,"version = \"" ++ version ++ " (" ++ state ++ ")\""
,"weakhash = " ++ case hash of
Just x -> show x
Nothing -> show "not available"
,"context = " ++ case ctx of
Just x -> show x
Nothing -> show "context not available"
]
weakhash :: Verbosity -> IO (Maybe String)
weakhash verbosity = do
inrepo <- doesDirectoryExist "_darcs"
unless inrepo $ fail "Not a repository."
out <- rawSystemStdout verbosity "darcs" ["show", "repo"]
let line = filter ("Weak Hash:" `isInfixOf`) $ lines out
return $ case line of
[] -> Nothing
x:_ -> Just $ last $ words x
`catchAny` \_ -> return Nothing
context :: Verbosity -> IO (Maybe String)
context verbosity =
do
inrepo <- doesDirectoryExist "_darcs"
unless inrepo $ fail "Not a repository."
out <- rawSystemStdout verbosity "darcs" ["log", "-a", "--context"]
return $ Just out
`catchAny` \_ -> parseFile "release/distributed-context"
parseFile :: Read a => FilePath -> IO (Maybe a)
parseFile f = do
exist <- doesFileExist f
if exist
then do
content <- readFile f
case reads content of
((s, _):_) -> return s
_ -> return Nothing
else return Nothing
|
