module Finder (
initFinder, -- :: [PackageConfig] -> IO (),
findModule, -- :: ModuleName -> IO (Maybe (Module, ModuleLocation))
- mkHomeModuleLocn, -- :: ModuleName -> String -> FilePath
+ 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 ( showSDoc, ppr ) -- debugging only
+import Outputable
\end{code}
The Finder provides a thin filesystem abstraction to the rest of the
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
; case j of
Just home_module -> return (Just home_module)
- Nothing -> maybePackageModule name
+ Nothing -> findPackageModule name
}
maybeHomeModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
maybeHomeModule mod_name = do
- home_cache <- readIORef v_HomeDirCache
+ home_path <- readIORef v_Import_paths
- 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 <- getDirectoryContents' 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
+ let mod_str = moduleNameUserString mod_name
+ basename = map (\c -> if c == '.' then '/' else c) mod_str
hs = basename ++ ".hs"
lhs = basename ++ ".lhs"
- case lookupFM home_map hs of {
+ found <- findOnPath home_path hs
+ case found of {
-- special case to avoid getting "./foo.hs" all the time
- Just "." -> mkHomeModuleLocn mod_name basename hs;
+ Just "." -> mkHomeModuleLocn mod_name basename (Just hs);
Just path -> mkHomeModuleLocn mod_name
- (path ++ '/':basename) (path ++ '/':hs);
- Nothing ->
+ (path ++ '/':basename) (Just (path ++ '/':hs));
+ Nothing -> do
- case lookupFM home_map lhs of {
+ found <- findOnPath home_path lhs
+ case found of {
-- special case to avoid getting "./foo.hs" all the time
- Just "." -> mkHomeModuleLocn mod_name basename lhs;
+ Just "." -> mkHomeModuleLocn mod_name basename (Just lhs);
Just path -> mkHomeModuleLocn mod_name
- (path ++ '/':basename) (path ++ '/':lhs);
+ (path ++ '/':basename) (Just (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);
+ found <- findOnPath home_path hi
+ case found of {
+ Just path -> mkHiOnlyModuleLocn mod_name hi;
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);
+ found <- findOnPath home_path hi_boot_ver
+ case found of {
+ Just path -> mkHiOnlyModuleLocn mod_name hi;
Nothing -> do
- case lookupFM home_map hi_boot of {
- Just path -> mkHomeModuleLocn mod_name
- (path ++ '/':basename) (path ++ '/':hs);
+ found <- findOnPath home_path hi_boot
+ case found of {
+ Just path -> mkHiOnlyModuleLocn mod_name hi;
Nothing -> return Nothing
}}}}}
+mkHiOnlyModuleLocn mod_name hi_file = do
+ return (Just (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
- -- 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 v_Output_hi
hisuf <- readIORef v_Hi_suf
- let hifile = case ohi of
- Nothing -> getdir basename
- ++ '/':moduleNameUserString mod_name
- ++ '.':hisuf
- Just fn -> fn
+ 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.
return (Just (mkHomeModule mod_name,
ModuleLocation{
ml_hspp_file = Nothing,
- ml_hs_file = Just source_fn,
- ml_hi_file = Just hifile,
+ ml_hs_file = maybe_source_fn,
+ ml_hi_file = hi_file,
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 <- getDirectoryContents' 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
+findPackageModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
+findPackageModule mod_name = do
+ pkgs <- getPackageInfo
-- hi-suffix for packages depends on the build tag.
package_hisuf <-
then return "hi"
else return (tag ++ "_hi")
- let basename = moduleNameUserString mod_name
+ let mod_str = moduleNameUserString mod_name
+ basename = map (\c -> if c == '.' then '/' else c) mod_str
hi = basename ++ '.':package_hisuf
- case lookupFM pkg_cache hi of
+ found <- findOnPackagePath pkgs hi
+ case found of
Nothing -> return Nothing
- Just (pkg_name,path) ->
+ 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_hi_file = 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"]
-
-getDirectoryContents' d
- = IO.catch (getDirectoryContents d)
- (\_ -> do hPutStr stderr
- ("WARNING: error while reading directory " ++ d)
- return []
- )
-
+findOnPackagePath :: [PackageConfig] -> String
+ -> IO (Maybe (PackageName,FilePath))
+findOnPackagePath pkgs file = loop pkgs
+ where
+ loop [] = return Nothing
+ loop (p:ps) = do
+ found <- findOnPath (import_dirs p) file
+ case found of
+ Nothing -> loop ps
+ Just path -> return (Just (mkFastString (name p), path))
+
+findOnPath :: [String] -> String -> IO (Maybe FilePath)
+findOnPath path s = loop path
+ where
+ loop [] = return Nothing
+ loop (d:ds) = do
+ let file = d ++ '/':s
+ b <- doesFileExist file
+ if b then return (Just d) else loop ds
\end{code}
projects / ghc-hetmet.git / blobdiff