\begin{code}
module CmFind ( Path, ModName, PkgName,
- ModLocation(..), Finder, newFinder )
+ ModLocation(..), ml_modname, isPackageLoc,
+ Finder, newFinder )
where
#include "HsVersions.h"
+import IO ( hPutStr, stderr )
+import List ( maximumBy )
+import Maybe ( catMaybes )
+import Char ( isUpper )
+import List ( nub )
+import Time ( ClockTime )
+import Directory ( doesFileExist, getModificationTime,
+ getDirectoryContents)
+
import Module ( Module )
-import CmStaticInfo ( PCI )
+import CmStaticInfo ( PCI, Package(..) )
\end{code}
\begin{code}
-type Path = String
+type Path = String
type ModName = String
type PkgName = String
data ModLocation
- = SourceOnly Module Path -- .hs
- | ObjectCode Module Path Path -- .o, .hi
- | InPackage Module PkgName
+ = SourceOnly ModName Path -- .hs
+ | ObjectCode ModName Path Path -- .o, .hi
+ | InPackage ModName PkgName
+ | NotFound
+ deriving Show
type Finder = ModName -> IO ModLocation
+ml_modname (SourceOnly nm _) = nm
+ml_modname (ObjectCode nm _ _) = nm
+ml_modname (InPackage nm _) = nm
+
+isPackageLoc (InPackage _ _) = True
+isPackageLoc _ = False
+
+mkFinder :: [(ModName,PkgName,Path)] -> [Path] -> Finder
+mkFinder pkg_ifaces home_dirs modnm
+ = do found <- mkFinderX pkg_ifaces home_dirs modnm
+ putStrLn ("FINDER pkginfo\n" ++ unlines (map show pkg_ifaces) ++ "\n")
+ putStrLn ("FINDER: request = " ++ modnm ++ "\n" ++
+ "FINDER: response = " ++ show found)
+ return found
+
+
+mkFinderX :: [(ModName,PkgName,Path)] -> [Path] -> Finder
+mkFinderX pkg_ifaces home_dirs modnm
+ -- If the module exists both as package and home, emit a warning
+ -- and (arbitrarily) choose the user's one.
+ = do home_maybe_found <- mapM (homeModuleExists modnm) home_dirs
+ :: IO [Maybe (ModLocation, ClockTime)]
+ case (in_package, catMaybes home_maybe_found) of
+ ([], [])
+ -> return NotFound
+ ([], locs_n_times@(_:_))
+ -> return (homeMod locs_n_times)
+ ((pkgname,path):_, [])
+ -> return (InPackage modnm pkgname)
+ (packages, locs_n_times)
+ -> do hPutStr stderr ( "GHCI: warning: module `" ++ modnm ++
+ "' appears as both a home and package module\n")
+ return (homeMod locs_n_times)
+ where
+ in_package
+ = [(pkgname,path) | (modname,pkgname,path) <- pkg_ifaces,
+ modname == modnm]
+ homeMod :: [(ModLocation, ClockTime)] -> ModLocation
+ homeMod locs_n_times
+ = fst (maximumBy (\lt1 lt2 -> if snd lt1 > snd lt2 then lt1 else lt2)
+ locs_n_times)
+
+
+-- See if a .hs or (.hi, .o) pair exist on the given path,
+-- and return a ModLocation for whichever is younger
+homeModuleExists :: ModName -> Path -> IO (Maybe (ModLocation, ClockTime))
+homeModuleExists modname path
+ = do m_ths <- maybeTime nm_hs
+ m_thi <- maybeTime nm_hi
+ m_to <- maybeTime nm_o
+ return (
+ case (m_ths, m_thi, m_to) of
+ (Just ths, Just thi, Just to)
+ | thi >= ths && to >= ths -> object thi to
+ | otherwise -> source ths
+ (Just ths, _, _) -> source ths
+ (Nothing, Just thi, Just to) -> object thi to
+ (Nothing, _, _) -> Nothing
+ )
+ where
+ object thi to = Just (ObjectCode modname nm_o nm_hi, max thi to)
+ source ths = Just (SourceOnly modname nm_hs, ths)
+ nm = path ++ "/" ++ modname
+ nm_hs = nm ++ ".hs"
+ nm_hi = nm ++ ".hi"
+ nm_o = nm ++ ".o"
+
+ maybeTime :: String -> IO (Maybe ClockTime)
+ maybeTime f
+ = do putStrLn ("maybeTime: " ++ f)
+ exists <- doesFileExist f
+ if not exists
+ then do putStrLn " ... no"
+ return Nothing
+ else do tm <- getModificationTime f
+ putStrLn (" ... " ++ show tm)
+ return (Just tm)
+
+
+
newFinder :: PCI -> IO Finder
-newFinder pci = return (error "newFinder:unimp")
+newFinder pci
+ -- PCI is a list of packages and their names
+ = do
+ -- the list of directories where package interfaces are
+ let p_i_dirs :: [(PkgName,Path)]
+ p_i_dirs = concatMap nm_and_paths pci
+
+ -- interface names in each directory
+ ifacess <- mapM ifaces_in_dir p_i_dirs
+ let ifaces :: [(ModName,PkgName,Path)]
+ ifaces = concat ifacess
+
+ -- ToDo: allow a range of home package directories
+ return (mkFinder ifaces ["."])
+ where
+ nm_and_paths :: Package -> [(PkgName,Path)]
+ nm_and_paths package
+ = [(name package, path) | path <- nub (import_dirs package)]
+
+ ifaces_in_dir :: (PkgName,Path) -> IO [(ModName,PkgName,Path)]
+ ifaces_in_dir (pkgname,path)
+ = getDirectoryContents path >>= \ entries ->
+ return [(zap_hi if_nm, pkgname, path)
+ | if_nm <- entries, looks_like_iface_name if_nm]
+ looks_like_iface_name e
+ = not (null e) && isUpper (head e)
+ && take 3 (reverse e) == "ih."
+ zap_hi
+ = reverse . drop 3 . reverse
+
\end{code}
projects / ghc-hetmet.git / blobdiff