-
--- caches contents of package directories, never expunged
-GLOBAL_VAR(pkgDirCache, Nothing, Maybe (FiniteMap String (PackageName, FilePath)))
-
--- caches contents of home directories, expunged whenever we
--- create a new finder.
-GLOBAL_VAR(homeDirCache, emptyFM, FiniteMap String FilePath)
-
--- caches finder mapping, expunged whenever we create a new finder.
-GLOBAL_VAR(finderMapCache, emptyFM, FiniteMap ModuleName Module)
-
-
-newFinder :: PackageConfigInfo -> IO Finder
-newFinder (PackageConfigInfo pkgs) = do
- -- expunge our caches
- writeIORef homeDirCache emptyFM
- writeIORef finderMapCache emptyFM
-
- -- populate the home dir cache, using the import path (the import path
- -- is changed by -i flags on the command line, and defaults to ["."]).
- home_imports <- readIORef import_paths
- let extendFM fm path = do
- contents <- getDirectoryContents' path
- return (addListToFM fm (zip contents (repeat path)))
- home_map <- foldM extendFM emptyFM home_imports
- writeIORef homeDirCache home_map
-
- -- populate the package cache, if necessary
- pkg_cache <- readIORef pkgDirCache
- case pkg_cache of
- Nothing -> do
-
- let extendFM fm pkg = do
- let dirs = import_dirs pkg
- pkg_name = _PK_ (name pkg)
- let addDir fm dir = do
- contents <- getDirectoryContents' dir
- return (addListToFM fm (zip contents
- (repeat (pkg_name,dir))))
- foldM addDir fm dirs
-
- pkg_map <- foldM extendFM emptyFM pkgs
- writeIORef pkgDirCache (Just pkg_map)
-
- Just _ ->
- return ()
-
- -- and return the finder
- return finder
-
-
-finder :: ModuleName -> IO (Maybe (Module, ModuleLocation))
-finder name = do
- j <- maybeHomeModule name
- case j of
- Just home_module -> return (Just home_module)
- Nothing -> maybePackageModule name
-
-maybeHomeModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
-maybeHomeModule mod_name = do
- home_cache <- readIORef homeDirCache
-
- let basename = moduleNameString mod_name
- hs = basename ++ ".hs"
- lhs = basename ++ ".lhs"
-
- case lookupFM home_cache hs of {
- Just path -> mkHomeModuleLocn mod_name (path ++ '/':basename) hs;
- Nothing ->
-
- case lookupFM home_cache lhs of {
- Just path -> mkHomeModuleLocn mod_name (path ++ '/':basename) lhs;
- Nothing -> return Nothing
-
- }}
-
-mkHomeModuleLocn mod_name basename source_fn = do
-
- -- figure out the .hi file name: it lives in the same dir as the
- -- source, unless there's a -ohi flag on the command line.
- ohi <- readIORef output_hi
- hisuf <- readIORef hi_suf
- let hifile = case ohi of
- Nothing -> basename ++ hisuf
- Just fn -> fn
+initFinder :: [PackageConfig] -> IO ()
+initFinder pkgs = return ()
+
+-- empty, and lazilly fill in the package cache
+flushPackageCache :: [PackageConfig] -> IO ()
+flushPackageCache pkgs = return ()
+
+emptyHomeDirCache :: IO ()
+emptyHomeDirCache = return ()
+
+findModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
+findModule name = findModuleDep name False
+
+findModuleDep :: ModuleName -> Bool -> IO (Maybe (Module, ModuleLocation))
+findModuleDep name is_source
+ = do { j <- maybeHomeModule name is_source
+ ; case j of
+ Just home_module -> return (Just home_module)
+ Nothing -> findPackageMod name False
+ }
+
+maybeHomeModule :: ModuleName -> Bool -> IO (Maybe (Module, ModuleLocation))
+maybeHomeModule mod_name is_source = do
+ home_path <- readIORef v_Import_paths
+ hisuf <- readIORef v_Hi_suf
+ mode <- readIORef v_GhcMode
+
+ let mod_str = moduleNameUserString mod_name
+ basename = map (\c -> if c == '.' then '/' else c) mod_str
+
+ -- In compilation manager modes, we look for source files in the home
+ -- package because we can compile these automatically. In one-shot
+ -- compilation mode we look for .hi files only.
+ --
+ -- When generating dependencies, we're interested in either category.
+ --
+ source_exts =
+ [ ("hs", \ _ fName path -> mkHomeModuleLocn mod_name path fName)
+ , ("lhs", \ _ fName path -> mkHomeModuleLocn mod_name path fName)
+ ]
+ hi_exts = [ (hisuf, \ _ fName path -> mkHiOnlyModuleLocn mod_name fName) ]
+
+ std_exts
+ | mode == DoMkDependHS = hi_exts ++ source_exts
+ | isCompManagerMode mode = source_exts
+ | otherwise = hi_exts
+
+ -- last chance: .hi-boot-<ver> and .hi-boot
+ hi_boot_ver = "hi-boot-" ++ cHscIfaceFileVersion
+
+ boot_exts =
+ [ (hi_boot_ver, \ _ fName path -> mkHiOnlyModuleLocn mod_name fName)
+ , ("hi-boot", \ _ fName path -> mkHiOnlyModuleLocn mod_name fName)
+ ]
+
+ searchPathExts
+ (map ((,) undefined) home_path)
+ basename
+ (if is_source then (boot_exts++std_exts) else std_exts ++ boot_exts)
+ -- for SOURCE imports, check the hi-boot extensions
+ -- before the source/iface ones, to avoid
+ -- creating circ Makefile deps.
+
+mkHiOnlyModuleLocn mod_name hi_file =
+ return
+ ( mkHomeModule mod_name
+ , ModuleLocation{ ml_hspp_file = Nothing
+ , ml_hs_file = Nothing
+ , ml_hi_file = hi_file
+ , ml_obj_file = Nothing
+ }
+ )
+
+-- The .hi file always follows the module name, whereas the object
+-- file may follow the name of the source file in the case where the
+-- two differ (see summariseFile in compMan/CompManager.lhs).
+
+mkHomeModuleLocn mod_name
+ basename -- everything but the extension
+ source_fn -- full path to the source (required)
+ = do
+
+ hisuf <- readIORef v_Hi_suf
+ hidir <- readIORef v_Hi_dir
+
+ -- take the *last* component of the module name (if a hierarchical name),
+ -- and append it to the directory to get the .hi file name.
+ let (_,mod_str) = split_longest_prefix (moduleNameUserString mod_name) (=='.')
+ hi_filename = mod_str ++ '.':hisuf
+ hi_path | Just d <- hidir = d
+ | otherwise = getdir basename
+ hi = hi_path ++ '/':hi_filename