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|
module Main (main) where
import Control.Monad (when)
import Data.Either (partitionEithers)
import Data.Foldable (for_, traverse_)
import Data.Maybe (listToMaybe)
import Data.String (fromString)
import Data.Traversable (for)
import System.Environment (getArgs)
import System.Exit (exitFailure)
import System.IO (hPutStrLn, stderr)
import qualified Data.Text as T
import qualified Cabal.Index as I
import qualified Cabal.Plan as P
import qualified Data.Aeson as A
import qualified Data.ByteString.Lazy as LBS
import qualified Data.Map.Strict as Map
import qualified Data.Set as Set
import qualified Distribution.Types.PackageName as C
import qualified Distribution.Types.Version as C
import qualified Topograph as TG
-------------------------------------------------------------------------------
-- Main
-------------------------------------------------------------------------------
main :: IO ()
main = do
args <- getArgs
case args of
[fp] -> main1 fp
_ -> die "Usage: hadrian-bootstrap-gen plan.json"
main1 :: FilePath -> IO ()
main1 planPath = do
meta <- I.cachedHackageMetadata
plan <- P.decodePlanJson planPath
main2 meta plan
main2 :: Map.Map C.PackageName I.PackageInfo -> P.PlanJson -> IO ()
main2 meta plan = do
info $ show $ Map.keys $ P.pjUnits plan
-- find hadrian-install:exe:hadrian unit
(hadrianUid, hadrianUnit) <- case findHadrianExe plan of
Just x -> return x
Nothing -> die "Cannot find hadrian:exe unit"
info $ "hadrian:exe unit " ++ show hadrianUid
-- BFS from hadrian unit, getting all dependencies
units <- bfs plan hadrianUnit
info $ "Unit order:"
for_ units $ \unit -> do
info $ " - " ++ show (P.uId unit)
(builtin, deps) <- fmap partitionEithers $ for units $ \unit -> do
let P.PkgId pkgname@(P.PkgName tpkgname) ver@(P.Ver verdigits) = P.uPId unit
let uid = P.uId unit
let cpkgname :: C.PackageName
cpkgname = C.mkPackageName (T.unpack tpkgname)
let cversion :: C.Version
cversion = C.mkVersion verdigits
case P.uType unit of
P.UnitTypeBuiltin ->
return $ Left Builtin
{ builtinPackageName = pkgname
, builtinVersion = ver
}
_ -> do
(src, rev, revhash) <- case P.uSha256 unit of
Just _ -> do
pkgInfo <- maybe (die $ "Cannot find " ++ show uid ++ " package metadata") return $
Map.lookup cpkgname meta
relInfo <- maybe (die $ "Cannot find " ++ show uid ++ " version metadata") return $
Map.lookup cversion $ I.piVersions pkgInfo
return
( Hackage
, Just $ fromIntegral (I.riRevision relInfo)
, P.sha256FromByteString $ I.getSHA256 $ I.riCabal relInfo
)
Nothing -> case P.uType unit of
P.UnitTypeLocal -> return (Local, Nothing, Nothing)
t -> die $ "Unit of wrong type " ++ show uid ++ " " ++ show t
return $ Right Dep
{ depPackageName = pkgname
, depVersion = ver
, depSource = src
, depSrcHash = P.uSha256 unit
, depRevision = rev
, depRevHash = revhash
, depFlags =
[ (if fval then "+" else "-") ++ T.unpack fname
| (P.FlagName fname, fval) <- Map.toList (P.uFlags unit)
]
}
LBS.putStr $ A.encode Result
{ resBuiltin = builtin
, resDependencies = deps
}
bfs :: P.PlanJson -> P.Unit -> IO [P.Unit]
bfs plan unit0 = do
uids <- either (\loop -> die $ "Loop in install-plan " ++ show loop) id $ TG.runG am $ \g -> do
v <- maybe (die "Cannot find hadrian-install unit in topograph") return $
TG.gToVertex g $ P.uId unit0
let t = TG.dfs g v
return $ map (TG.gFromVertex g) $
-- nub and sort
reverse $ Set.toList $ Set.fromList $ concat t
for uids $ \uid -> do
unit <- lookupUnit units uid
case Map.toList (P.uComps unit) of
[(_, compinfo)] -> checkExeDeps uid (P.pjUnits plan) (P.ciExeDeps compinfo)
_ -> die $ "Unit with multiple components " ++ show uid
return unit
where
am :: Map.Map P.UnitId (Set.Set P.UnitId)
am = fmap (foldMap P.ciLibDeps . P.uComps) units
units = P.pjUnits plan
checkExeDeps :: P.UnitId -> Map.Map P.UnitId P.Unit -> Set.Set P.UnitId -> IO ()
checkExeDeps pkgUid units = traverse_ check . Set.toList where
check uid = do
unit <- lookupUnit units uid
let P.PkgId pkgname _ = P.uPId unit
when (pkgname /= P.PkgName (fromString "hsc2hs")) $ do
die $ "unit " ++ show pkgUid ++ " depends on executable " ++ show uid
lookupUnit :: Map.Map P.UnitId P.Unit -> P.UnitId -> IO P.Unit
lookupUnit units uid
= maybe (die $ "Cannot find unit " ++ show uid) return
$ Map.lookup uid units
-------------------------------------------------------------------------------
-- Data
-------------------------------------------------------------------------------
data Result = Result
{ resBuiltin :: [Builtin]
, resDependencies :: [Dep]
}
deriving (Show)
data Builtin = Builtin
{ builtinPackageName :: P.PkgName
, builtinVersion :: P.Ver
}
deriving (Show)
data Dep = Dep
{ depPackageName :: P.PkgName
, depVersion :: P.Ver
, depSource :: SrcType
, depSrcHash :: Maybe P.Sha256
, depRevision :: Maybe Int
, depRevHash :: Maybe P.Sha256
, depFlags :: [String]
}
deriving (Show)
data SrcType
= Hackage
| Local
deriving (Show)
instance A.ToJSON Result where
toJSON res = A.object
[ fromString "builtin" A..= resBuiltin res
, fromString "dependencies" A..= resDependencies res
]
instance A.ToJSON Builtin where
toJSON b = A.object
[ fromString "package" A..= builtinPackageName b
, fromString "version" A..= builtinVersion b
]
instance A.ToJSON Dep where
toJSON dep = A.object
[ fromString "package" A..= depPackageName dep
, fromString "version" A..= depVersion dep
, fromString "source" A..= depSource dep
, fromString "src_sha256" A..= depSrcHash dep
, fromString "revision" A..= depRevision dep
, fromString "cabal_sha256" A..= depRevHash dep
, fromString "flags" A..= depFlags dep
]
instance A.ToJSON SrcType where
toJSON Hackage = fromString "hackage"
toJSON Local = fromString "local"
-------------------------------------------------------------------------------
-- Utilities
-------------------------------------------------------------------------------
info :: String -> IO ()
info msg = hPutStrLn stderr $ "INFO: " ++ msg
die :: String -> IO a
die msg = do
hPutStrLn stderr msg
exitFailure
-------------------------------------------------------------------------------
-- Pure bits
-------------------------------------------------------------------------------
findHadrianExe :: P.PlanJson -> Maybe (P.UnitId, P.Unit)
findHadrianExe plan = listToMaybe
[ (uid, unit)
| (uid, unit) <- Map.toList (P.pjUnits plan)
, let P.PkgId pkgname _ = P.uPId unit
, pkgname == P.PkgName (fromString "hadrian")
, Map.keys (P.uComps unit) == [P.CompNameExe (fromString "hadrian")]
]
|
