module Finder (
initFinder, -- :: [PackageConfig] -> IO (),
findModule, -- :: ModuleName -> IO (Maybe (Module, ModuleLocation))
- mkHomeModuleLocn, -- :: ModuleName -> String -> FilePath
+ findModuleDep, -- :: ModuleName -> Bool -> IO (Maybe (Module, ModuleLocation))
+ findPackageModule, -- :: ModuleName -> IO (Maybe (Module, ModuleLocation))
+ mkHomeModuleLocn, -- :: ModuleName -> String -> Maybe FilePath
-- -> IO ModuleLocation
- emptyHomeDirCache -- :: IO ()
+ emptyHomeDirCache, -- :: IO ()
+ flushPackageCache -- :: [PackageConfig] -> IO ()
) where
#include "HsVersions.h"
import HscTypes ( ModuleLocation(..) )
-import CmStaticInfo
+import Packages ( PackageConfig(..) )
import DriverPhases
import DriverState
-import DriverUtil
import Module
-import FiniteMap
-import Util
-import Panic ( panic )
+import FastString
import Config
import IOExts
-import Directory
import List
+import Directory
import IO
import Monad
import Outputable
source, interface, and object files for a module live.
\begin{code}
-
--- v_PkgDirCache caches contents of package directories, never expunged
-GLOBAL_VAR(v_PkgDirCache, panic "no pkg cache!",
- FiniteMap String (PackageName, FilePath))
-
--- v_HomeDirCache caches contents of home directories,
--- expunged whenever we create a new finder.
-GLOBAL_VAR(v_HomeDirCache, Nothing, Maybe (FiniteMap String FilePath))
-
-
initFinder :: [PackageConfig] -> IO ()
-initFinder pkgs
- = do { -- expunge our home cache
- ; writeIORef v_HomeDirCache Nothing
- -- lazilly fill in the package cache
- ; writeIORef v_PkgDirCache (unsafePerformIO (newPkgCache pkgs))
- }
+initFinder pkgs = return ()
+
+-- empty, and lazilly fill in the package cache
+flushPackageCache :: [PackageConfig] -> IO ()
+flushPackageCache pkgs = return ()
emptyHomeDirCache :: IO ()
-emptyHomeDirCache
- = writeIORef v_HomeDirCache Nothing
+emptyHomeDirCache = return ()
findModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
-findModule name
- = do { j <- maybeHomeModule name
+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 -> maybePackageModule name
+ Nothing -> findPackageMod name False
}
-maybeHomeModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
-maybeHomeModule mod_name = do
- home_cache <- readIORef v_HomeDirCache
-
- home_map <-
- case home_cache of
- Nothing -> do
- -- 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 v_Import_paths
- let extendFM fm path = do
- contents <- softGetDirectoryContents path
- let clean_contents = filter isUsefulFile contents
- return (addListToFM fm (zip clean_contents (repeat path)))
- home_map <- foldM extendFM emptyFM home_imports
- writeIORef v_HomeDirCache (Just home_map)
- return home_map
-
- Just home_map -> return home_map
-
- let basename = moduleNameUserString mod_name
- hs = basename ++ ".hs"
- lhs = basename ++ ".lhs"
-
- case lookupFM home_map hs of {
- -- special case to avoid getting "./foo.hs" all the time
- Just "." -> mkHomeModuleLocn mod_name basename hs;
- Just path -> mkHomeModuleLocn mod_name
- (path ++ '/':basename) (path ++ '/':hs);
- Nothing ->
-
- case lookupFM home_map lhs of {
- -- special case to avoid getting "./foo.hs" all the time
- Just "." -> mkHomeModuleLocn mod_name basename lhs;
- Just path -> mkHomeModuleLocn mod_name
- (path ++ '/':basename) (path ++ '/':lhs);
- Nothing -> do
-
- -- can't find a source file anywhere, check for a lone .hi file.
- hisuf <- readIORef v_Hi_suf
- let hi = basename ++ '.':hisuf
- case lookupFM home_map hi of {
- Just path -> mkHomeModuleLocn mod_name
- (path ++ '/':basename) (path ++ '/':hs);
- Nothing -> do
-
- -- last chance: .hi-boot-<ver> and .hi-boot
- let hi_boot = basename ++ ".hi-boot"
- let hi_boot_ver = basename ++ ".hi-boot-" ++ cHscIfaceFileVersion
- case lookupFM home_map hi_boot_ver of {
- Just path -> mkHomeModuleLocn mod_name
- (path ++ '/':basename) (path ++ '/':hs);
- Nothing -> do
- case lookupFM home_map hi_boot of {
- Just path -> mkHomeModuleLocn mod_name
- (path ++ '/':basename) (path ++ '/':hs);
- Nothing -> return Nothing
- }}}}}
-
+maybeHomeModule :: ModuleName -> Bool -> IO (Maybe (Module, ModuleLocation))
+maybeHomeModule mod_name is_source = do
+ home_path <- readIORef v_Import_paths
+ hisuf <- readIORef v_Hi_suf
+
+ let mod_str = moduleNameUserString mod_name
+ basename = map (\c -> if c == '.' then '/' else c) mod_str
+ -- last chance: .hi-boot-<ver> and .hi-boot
+ hi_boot_ver = "hi-boot-" ++ cHscIfaceFileVersion
+
+ std_exts =
+ [ (hisuf,
+ \ _ fName path -> mkHiOnlyModuleLocn mod_name fName)
+ , ("hs",
+ \ _ fName path -> mkHomeModuleLocn mod_name path (Just fName))
+ , ("lhs",
+ \ _ fName path -> mkHomeModuleLocn mod_name path (Just fName))
+ ]
+
+ 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 source_fn = do
+mkHomeModuleLocn mod_name basename maybe_source_fn = do
hisuf <- readIORef v_Hi_suf
- let hifile = getdir basename ++ '/':moduleNameUserString mod_name
- ++ '.':hisuf
+ hidir <- readIORef v_Hi_dir
+
+ let hi_rest = basename ++ '.':hisuf
+ hi_file | Just d <- hidir = d ++ '/':hi_rest
+ | otherwise = hi_rest
-- figure out the .o file name. It also lives in the same dir
-- as the source, but can be overriden by a -odir flag.
o_file <- odir_ify (basename ++ '.':phaseInputExt Ln) >>= osuf_ify
- return (Just (mkHomeModule mod_name,
- ModuleLocation{
- ml_hspp_file = Nothing,
- ml_hs_file = Just source_fn,
- ml_hi_file = Just hifile,
- ml_obj_file = Just o_file
- }
- ))
-
-
-newPkgCache :: [PackageConfig] -> IO (FiniteMap String (PackageName, FilePath))
-newPkgCache pkgs = do
- let extendFM fm pkg = do
- let dirs = import_dirs pkg
- pkg_name = _PK_ (name pkg)
- let addDir fm dir = do
- contents <- softGetDirectoryContents dir
- return (addListToFM fm (zip contents
- (repeat (pkg_name,dir))))
- foldM addDir fm dirs
-
- pkg_map <- foldM extendFM emptyFM pkgs
- return pkg_map
-
-
-maybePackageModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
-maybePackageModule mod_name = do
- pkg_cache <- readIORef v_PkgDirCache
-
- -- hi-suffix for packages depends on the build tag.
+ return (mkHomeModule mod_name,
+ ModuleLocation{ ml_hspp_file = Nothing
+ , ml_hs_file = maybe_source_fn
+ , ml_hi_file = hi_file
+ , ml_obj_file = Just o_file
+ })
+
+findPackageMod :: ModuleName
+ -> Bool
+ -> IO (Maybe (Module, ModuleLocation))
+findPackageMod mod_name hiOnly = do
+ pkgs <- getPackageInfo
+
+ -- hi-suffix for packages depends on the build tag.
package_hisuf <-
do tag <- readIORef v_Build_tag
if null tag
then return "hi"
else return (tag ++ "_hi")
-
- let basename = moduleNameUserString mod_name
- hi = basename ++ '.':package_hisuf
-
- case lookupFM pkg_cache hi of
- Nothing -> return Nothing
- Just (pkg_name,path) ->
- return (Just (mkModule mod_name pkg_name,
- ModuleLocation{
- ml_hspp_file = Nothing,
- ml_hs_file = Nothing,
- ml_hi_file = Just (path ++ '/':hi),
- ml_obj_file = Nothing
- }
- ))
-
-isUsefulFile fn
- = let suffix = (reverse . takeWhile (/= '.') . reverse) fn
- in suffix `elem` ["hi", "hs", "lhs", "hi-boot", "hi-boot-5"]
+ let imp_dirs = concatMap (\ pkg -> map ((,) pkg) (import_dirs pkg)) pkgs
+ mod_str = moduleNameUserString mod_name
+ basename = map (\c -> if c == '.' then '/' else c) mod_str
+ searchPathExts
+ imp_dirs basename
+ ((package_hisuf,\ pkg fName path -> mkPackageModule mod_name pkg Nothing path) :
+ -- can packages contain hi-boots?
+ (if hiOnly then [] else
+ [ ("hs", \ pkg fName path -> mkPackageModule mod_name pkg (Just fName) path)
+ , ("lhs", \ pkg fName path -> mkPackageModule mod_name pkg (Just fName) path)
+ ]))
+ where
+ mkPackageModule mod_name pkg mbFName path =
+ return ( mkModule mod_name (mkFastString (name pkg))
+ , ModuleLocation{ ml_hspp_file = Nothing
+ , ml_hs_file = mbFName
+ , ml_hi_file = path ++".hi"
+ , ml_obj_file = Nothing
+ })
+
+findPackageModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
+findPackageModule mod_name = findPackageMod mod_name True
+
+searchPathExts :: [(a, FilePath)]
+ -> String
+ -> [(String, a -> FilePath -> String -> IO (Module, ModuleLocation))]
+ -> IO (Maybe (Module, ModuleLocation))
+searchPathExts path basename exts = search exts
+ where
+ search [] = return Nothing
+ search ((x,f):xs) = do
+ let fName = (basename ++ '.':x)
+ found <- findOnPath path fName
+ case found of
+ -- special case to avoid getting "./foo.<ext>" all the time
+ Just (v,".") -> fmap Just (f v fName basename)
+ Just (v,path) -> fmap Just (f v (path ++ '/':fName)
+ (path ++ '/':basename))
+ Nothing -> search xs
+
+findOnPath :: [(a,String)] -> String -> IO (Maybe (a, FilePath))
+findOnPath path s = loop path
+ where
+ loop [] = return Nothing
+ loop ((a,d):ds) = do
+ let file = d ++ '/':s
+ b <- doesFileExist file
+ if b then return (Just (a,d)) else loop ds
\end{code}
projects / ghc-hetmet.git / blobdiff