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import Control.Monad
import Data.List
import Distribution.Simple
import Distribution.Simple.LocalBuildInfo
import Distribution.Simple.Setup
import Distribution.Simple.Utils
import System.Directory
main = defaultMainWithHooks hooks
hooks :: UserHooks
hooks = simpleUserHooks
{ buildHook = \pkgDesc localBuildInfo hooks flags -> do
let paths = (absoluteInstallDirs pkgDesc localBuildInfo dest)
{- libsubdir = "<undef>"
, datasubdir = "<undef>"
-}
dest = maybe NoCopyDest CopyTo $
flagToMaybe $ buildDistPref flags
buildSystemDConfig localBuildInfo paths
buildHook simpleUserHooks pkgDesc localBuildInfo hooks flags
, copyHook = \pkgDesc localBuildInfo hooks flags -> do
let paths = (absoluteInstallDirs pkgDesc localBuildInfo (fromFlag $ copyDest flags))
{- libsubdir = "<undef>"
, datasubdir = "<undef>"
-}
dest = maybe NoCopyDest CopyTo $
flagToMaybe $ copyDistPref flags
copySystemDConfig localBuildInfo paths flags
copyHook simpleUserHooks pkgDesc localBuildInfo hooks flags
}
-- Drop a /-terminated prefix from a Filepath. The / is not dropped.
dropPrefix :: String -> FilePath -> FilePath
dropPrefix prefix s | prefix `isPrefixOf` s = drop (length prefix - 1) s
| otherwise = s
exestart :: FilePath -> InstallDirs FilePath -> String -> String
exestart buildprefix paths cmd
| "ExecStart=" `isPrefixOf` cmd = "ExecStart="++(dropPrefix buildprefix $ bindir paths) ++ "/presence"
| otherwise = cmd
buildSystemDConfig :: LocalBuildInfo -> InstallDirs FilePath -> IO ()
buildSystemDConfig buildInfo paths = do
template <- lines <$> readFile "presence.service"
let buildprefix = takeWhile (/='/') (buildDir buildInfo) ++ "/"
service = map (exestart buildprefix paths) template
createDirectoryIfMissing True (buildDir buildInfo)
writeFile (buildDir buildInfo ++ "/presence.service") $ unlines service
preferredSystemDPath prefix =
case removeSlashes prefix of
"" -> "/lib/systemd/system"
"usr" -> "/lib/systemd/system"
_ -> "/etc/systemd/system"
removeSlashes prefix = reverse $ dropWhile (=='/') $ reverse $ dropWhile (=='/') prefix
-- InstallDirs {prefix = "dest/usr/local"
-- , bindir = "dest/usr/local/bin"
-- , libdir = "dest/usr/local/lib/x86_64-linux-ghc-8.0.2/presence-0.0.1-1fqjx0Frxyf1ESoA9cNUiZ"
-- , libsubdir = "<undef>"
-- , dynlibdir = "dest/usr/local/lib/x86_64-linux-ghc-8.0.2"
-- , libexecdir = "dest/usr/local/libexec"
-- , includedir = "dest/usr/local/lib/x86_64-linux-ghc-8.0.2/presence-0.0.1-1fqjx0Frxyf1ESoA9cNUiZ/include"
-- , datadir = "dest/usr/local/share/x86_64-linux-ghc-8.0.2/presence-0.0.1"
-- , datasubdir = "<undef>"
-- , docdir = "dest/usr/local/share/doc/x86_64-linux-ghc-8.0.2/presence-0.0.1"
-- , mandir = "dest/usr/local/share/man"
-- , htmldir = "dest/usr/local/share/doc/x86_64-linux-ghc-8.0.2/presence-0.0.1/html"
-- , haddockdir = "dest/usr/local/share/doc/x86_64-linux-ghc-8.0.2/presence-0.0.1/html"
-- , sysconfdir = "dest/usr/local/etc"}
-- CopyFlags
-- { copyDest = Flag (CopyTo "dest/")
-- , copyDistPref = Flag "dist"
-- , copyVerbosity = Flag Verbose}
-- realprefix = dest/usr/local
copySystemDConfig :: LocalBuildInfo -> InstallDirs FilePath -> CopyFlags -> IO ()
copySystemDConfig buildInfo paths flags = do
-- print paths
-- print flags
let verbosity = fromFlag (copyVerbosity flags)
built = buildDir buildInfo ++ "/presence.service"
realprefix = dropPrefix dest (prefix paths)
dest = case fromFlag (copyDest flags) of
NoCopyDest -> ""
CopyTo p -> p
sysddir = dest ++ drop 1 (preferredSystemDPath realprefix)
sysdpath = sysddir ++ "/presence.service"
-- putStrLn $ "realprefix = " ++ realprefix
-- putStrLn $ "no slashes = " ++ removeSlashes realprefix
-- putStrLn $ "sysdpath = " ++ sysdpath
createDirectoryIfMissing True sysddir
installOrdinaryFile verbosity built sysdpath
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