81 lines
3 KiB
Haskell
81 lines
3 KiB
Haskell
module Build.Dependencies (getSortedDependencies) where
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import Data.Data
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import Control.Monad.State
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import qualified Data.Graph as Graph
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import qualified Data.List as List
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import qualified Data.Map as Map
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import qualified Data.Set as Set
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import System.Directory
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import System.Exit
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import System.FilePath as FP
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import Text.PrettyPrint (Doc)
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import SourceSyntax.Everything
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import qualified SourceSyntax.Type as Type
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import qualified Parse.Parse as Parse
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import qualified Metadata.Prelude as Prelude
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import qualified Transform.Check as Check
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import qualified Transform.SortDefinitions as SD
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import qualified Type.Inference as TI
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import qualified Type.Constrain.Declaration as TcDecl
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import qualified Transform.Canonicalize as Canonical
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getSortedDependencies :: [FilePath] -> Interfaces -> FilePath -> IO [String]
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getSortedDependencies srcDirs builtIns root =
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sortDeps =<< readDeps srcDirs builtIns root
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type Deps = (FilePath, String, [String])
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sortDeps :: [Deps] -> IO [String]
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sortDeps depends =
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if null mistakes
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then return (concat sccs)
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else print msg >> mapM print mistakes >> exitFailure
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where
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sccs = map Graph.flattenSCC $ Graph.stronglyConnComp depends
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mistakes = filter (\scc -> length scc > 1) sccs
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msg = "A cyclical module dependency or was detected in: "
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readDeps :: [FilePath] -> Interfaces -> FilePath -> IO [Deps]
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readDeps srcDirs builtIns root = do
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let ifaces = (Set.fromList . Map.keys) builtIns
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evalStateT (go ifaces root) Set.empty
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where
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go :: Set.Set String -> FilePath -> StateT (Set.Set String) IO [Deps]
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go builtIns root = do
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(root', txt) <- liftIO $ getFile srcDirs root
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case Parse.dependencies txt of
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Left err -> liftIO (putStrLn msg >> print err >> exitFailure)
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where msg = "Error resolving dependencies in " ++ root' ++ ":"
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Right (name,deps) ->
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do seen <- get
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let realDeps = Set.difference (Set.fromList deps) builtIns
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newDeps = Set.difference (Set.filter (not . isNative) realDeps) seen
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put (Set.insert name (Set.union newDeps seen))
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rest <- mapM (go builtIns . toFilePath) (Set.toList newDeps)
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return ((makeRelative "." root', name, Set.toList realDeps) : concat rest)
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getFile :: [FilePath] -> FilePath -> IO (FilePath,String)
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getFile [] path = do
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putStrLn $ unlines [ "Could not find file: " ++ path
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, " If it is not in the root directory of your project, use"
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, " --src-dir to declare additional locations for source files." ]
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exitFailure
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getFile (dir:dirs) path = do
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let path' = dir </> path
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exists <- doesFileExist path'
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case exists of
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True -> (,) path' `fmap` readFile path'
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False -> getFile dirs path
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isNative name = List.isPrefixOf "Native." name
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toFilePath :: String -> FilePath
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toFilePath name = map swapDots name ++ ext
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where swapDots '.' = '/'
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swapDots c = c
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ext = if isNative name then ".js" else ".elm"
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