\begin{code}
module Finder (
- initFinder, -- :: [PackageConfig] -> IO (),
flushFinderCache, -- :: IO ()
- findModule, -- :: ModuleName -> IO (Maybe (Module, ModLocation))
- findPackageModule, -- :: ModuleName -> IO (Maybe (Module, ModLocation))
+ findModule, -- :: ModuleName
+ -- -> IO (Either [FilePath] (Module, ModLocation))
+
+ findPackageModule, -- :: ModuleName
+ -- -> IO (Either [FilePath] (Module, ModLocation))
mkHomeModLocation, -- :: ModuleName -> String -> FilePath
-- -> IO ModLocation
import Module
import UniqFM ( filterUFM )
-import Packages ( PackageConfig(..) )
import HscTypes ( Linkable(..), Unlinked(..) )
import DriverState
import DriverUtil ( split_longest_prefix, splitFilename3 )
-- It does *not* know which particular package a module lives in, because
-- that information is only contained in the interface file.
-initFinder :: [PackageConfig] -> IO ()
-initFinder pkgs = return ()
-
-- -----------------------------------------------------------------------------
-- The finder's cache
-- The ModLocation contains the names of all the files associated with
-- that module: its source file, .hi file, object file, etc.
-findModule :: ModuleName -> IO (Maybe (Module, ModLocation))
+findModule :: ModuleName -> IO (Either [FilePath] (Module, ModLocation))
findModule name = do
r <- lookupFinderCache name
case r of
- Just result -> return (Just result)
+ Just result -> return (Right result)
Nothing -> do
j <- maybeHomeModule name
case j of
- Just home_module -> return (Just home_module)
- Nothing -> findPackageMod name
-
-findPackageModule :: ModuleName -> IO (Maybe (Module, ModLocation))
+ Right home_module -> return (Right home_module)
+ Left home_files -> do
+ r <- findPackageMod name
+ case r of
+ Right pkg_module -> return (Right pkg_module)
+ Left pkg_files -> return (Left (home_files ++ pkg_files))
+
+findPackageModule :: ModuleName -> IO (Either [FilePath] (Module, ModLocation))
findPackageModule name = do
r <- lookupFinderCache name
case r of
- Just result -> return (Just result)
+ Just result -> return (Right result)
Nothing -> findPackageMod name
hiBootExt = "hi-boot"
hiBootVerExt = "hi-boot-" ++ cHscIfaceFileVersion
-maybeHomeModule :: ModuleName -> IO (Maybe (Module, ModLocation))
+maybeHomeModule :: ModuleName -> IO (Either [FilePath] (Module, ModLocation))
maybeHomeModule mod_name = do
home_path <- readIORef v_Import_paths
hisuf <- readIORef v_Hi_suf
-- -----------------------------------------------------------------------------
-- Looking for a package module
-findPackageMod :: ModuleName -> IO (Maybe (Module, ModLocation))
+findPackageMod :: ModuleName -> IO (Either [FilePath] (Module, ModLocation))
findPackageMod mod_name = do
mode <- readIORef v_GhcMode
imp_dirs <- getPackageImportPath -- including the 'auto' ones
String -> String -> String -> IO (Module, ModLocation) -- action
)
]
- -> IO (Maybe (Module, ModLocation))
+ -> IO (Either [FilePath] (Module, ModLocation))
-searchPathExts path mod_name exts = search path
+searchPathExts path mod_name exts = search to_search
where
mod_str = moduleNameUserString mod_name
basename = map (\c -> if c == '.' then '/' else c) mod_str
- search [] = return Nothing
- search (p:ps) = loop exts
- where
- base | p == "." = basename
- | otherwise = p ++ '/':basename
-
- loop [] = search ps
- loop ((ext,fn):exts) = do
- let file = base ++ '.':ext
- b <- doesFileExist file
- if b then Just `liftM` fn p basename ext
- else loop exts
+ to_search :: [(FilePath, IO (Module,ModLocation))]
+ to_search = [ (file, fn p basename ext)
+ | p <- path,
+ (ext,fn) <- exts,
+ let base | p == "." = basename
+ | otherwise = p ++ '/':basename
+ file = base ++ '.':ext
+ ]
+
+ search [] = return (Left (map fst to_search))
+ search ((file, result) : rest) = do
+ b <- doesFileExist file
+ if b
+ then Right `liftM` result
+ else search rest
-- -----------------------------------------------------------------------------
-- Building ModLocations
mkHiOnlyModLocation hisuf mod_name path basename extension = do
+ loc <- hiOnlyModLocation path basename hisuf
+ let result = (mkHomeModule mod_name, loc)
addToFinderCache mod_name result
return result
- where
- result = ( mkHomeModule mod_name, hiOnlyModLocation path basename hisuf )
mkPackageModLocation hisuf mod_name path basename _extension = do
+ loc <- hiOnlyModLocation path basename hisuf
+ let result = (mkPackageModule mod_name, loc)
addToFinderCache mod_name result
return result
- where
- result = ( mkPackageModule mod_name, hiOnlyModLocation path basename hisuf )
-
-hiOnlyModLocation path basename hisuf =
- ModLocation{ ml_hspp_file = Nothing,
- ml_hs_file = Nothing,
- -- remove the .hi-boot suffix from hi_file, if it
- -- had one. We always want the name of the real
- -- .hi file in the ml_hi_file field.
- ml_hi_file = path ++ '/':basename ++ '.':hisuf,
- ml_obj_file = Nothing
- }
+
+hiOnlyModLocation path basename hisuf
+ = do { obj_fn <- mkObjPath path basename ;
+ return (ModLocation{ ml_hspp_file = Nothing,
+ ml_hs_file = Nothing,
+ ml_hi_file = path ++ '/':basename ++ '.':hisuf,
+ -- Remove the .hi-boot suffix from
+ -- hi_file, if it had one. We always
+ -- want the name of the real .hi file
+ -- in the ml_hi_file field.
+ ml_obj_file = obj_fn
+ })}
-- -----------------------------------------------------------------------------
-- Constructing a home module location
hisuf <- readIORef v_Hi_suf
hidir <- readIORef v_Hi_dir
- odir <- readIORef v_Output_dir
- osuf <- readIORef v_Object_suf
+
+ obj_fn <- mkObjPath path basename
let -- hi filename
mod_str = moduleNameUserString mod_name
| path == "." = basename ++ '.':extension
| otherwise = path ++ '/':basename ++ '.':extension
- -- the object filename
- obj_path | Just d <- odir = d
- | otherwise = path
- obj_fn = obj_path ++ '/':basename ++ '.':osuf
-
-
result = ( mkHomeModule mod_name,
ModLocation{ ml_hspp_file = Nothing,
ml_hs_file = Just source_fn,
ml_hi_file = hi_fn,
- ml_obj_file = Just obj_fn,
+ ml_obj_file = obj_fn,
})
addToFinderCache mod_name result
return result
+mkObjPath :: String -> FilePath -> IO FilePath
+-- Construct the filename of a .o file from the path/basename
+-- derived either from a .hs file or a .hi file.
+--
+-- Does *not* check whether the .o file exists
+mkObjPath path basename
+ = do odir <- readIORef v_Output_dir
+ osuf <- readIORef v_Object_suf
+ let obj_path | Just d <- odir = d
+ | otherwise = path
+ return (obj_path ++ '/':basename ++ '.':osuf)
+
+
+
-- -----------------------------------------------------------------------------
-- findLinkable isn't related to the other stuff in here,
-- but there' no other obvious place for it
findLinkable :: ModuleName -> ModLocation -> IO (Maybe Linkable)
findLinkable mod locn
- | Just obj_fn <- ml_obj_file locn
- = do obj_exist <- doesFileExist obj_fn
+ = do let obj_fn = ml_obj_file locn
+ obj_exist <- doesFileExist obj_fn
if not obj_exist
then return Nothing
else
if stub_exist
then return (Just (LM obj_time mod [DotO obj_fn, DotO stub_fn]))
else return (Just (LM obj_time mod [DotO obj_fn]))
- | otherwise
- = return Nothing
\end{code}
projects / ghc-hetmet.git / blobdiff