\begin{code}
module Finder (
- initFinder, -- :: PackageConfigInfo -> IO (),
- findModule -- :: ModuleName -> IO (Maybe (Module, ModuleLocation))
+ initFinder, -- :: [PackageConfig] -> IO (),
+ findModule, -- :: ModuleName -> IO (Maybe (Module, ModuleLocation))
+ mkHomeModuleLocn, -- :: ModuleName -> String -> FilePath
+ -- -> IO ModuleLocation
+ emptyHomeDirCache, -- :: IO ()
+ flushPackageCache -- :: [PackageConfig] -> IO ()
) where
#include "HsVersions.h"
import CmStaticInfo
import DriverPhases
import DriverState
+import DriverUtil
import Module
import FiniteMap
import Util
+import Panic ( panic )
+import Config
import IOExts
-import Directory
import List
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
\begin{code}
-- v_PkgDirCache caches contents of package directories, never expunged
-GLOBAL_VAR(v_PkgDirCache, error "no pkg cache!", FiniteMap String (PackageName, FilePath))
+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))
+GLOBAL_VAR(v_HomeDirCache, Nothing, Maybe (FiniteMap String FilePath))
-initFinder :: PackageConfigInfo -> IO ()
+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))
-
--- Debug output
--- ; pkg_dbg_info <- readIORef v_PkgDirCache
--- ; putStrLn (unlines (map show (fmToList pkg_dbg_info)))
- }
+ = do emptyHomeDirCache
+ flushPackageCache pkgs
+
+-- empty, and lazilly fill in the package cache
+flushPackageCache :: [PackageConfig] -> IO ()
+flushPackageCache pkgs = writeIORef v_PkgDirCache
+ (unsafePerformIO (newPkgCache pkgs))
+
+emptyHomeDirCache :: IO ()
+emptyHomeDirCache = writeIORef v_HomeDirCache Nothing
findModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
findModule name
- = do { hPutStr stderr ("findModule: " ++ moduleNameUserString name ++ " ... ")
- ; maybe_m <- findModule_wrk name
- ; case maybe_m of
- Nothing -> hPutStrLn stderr "Not Found"
- Just mm -> hPutStrLn stderr (showSDoc (ppr (snd mm)))
- ; return maybe_m
- }
-
-findModule_wrk :: ModuleName -> IO (Maybe (Module, ModuleLocation))
-findModule_wrk name
= do { j <- maybeHomeModule name
; case j of
Just home_module -> return (Just home_module)
- Nothing -> maybePackageModule name
+ Nothing -> maybePackageModule name
}
maybeHomeModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
-- to ["."]).
home_imports <- readIORef v_Import_paths
let extendFM fm path = do
- contents <- getDirectoryContents' path
+ contents <- softGetDirectoryContents path
let clean_contents = filter isUsefulFile contents
return (addListToFM fm (zip clean_contents (repeat path)))
- home_map <- foldM extendFM emptyFM home_imports
+ home_map <- foldM extendFM emptyFM (reverse home_imports)
writeIORef v_HomeDirCache (Just home_map)
return home_map
Just home_map -> return home_map
- let basename = moduleNameString mod_name
+ let basename = moduleNameUserString mod_name
hs = basename ++ ".hs"
lhs = basename ++ ".lhs"
case lookupFM home_map hs of {
- Just path -> mkHomeModuleLocn mod_name (path ++ '/':basename) hs;
+ -- 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 {
- Just path -> mkHomeModuleLocn mod_name (path ++ '/':basename) lhs;
+ -- 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
+ }}}}}
+
- }}
+-- 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
- -- 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 -> basename ++ '.':hisuf
- Just fn -> fn
+ let hifile = getdir basename ++ '/':moduleNameUserString mod_name
+ ++ '.':hisuf
-- figure out the .o file name. It also lives in the same dir
-- as the source, but can be overriden by a -odir flag.
))
-newPkgCache :: [Package] -> IO (FiniteMap String (PackageName, FilePath))
+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
- let clean_contents = filter isUsefulFile contents
- return (addListToFM fm (zip clean_contents
+ contents <- softGetDirectoryContents dir
+ return (addListToFM fm (zip contents
(repeat (pkg_name,dir))))
foldM addDir fm dirs
then return "hi"
else return (tag ++ "_hi")
- let basename = moduleNameString mod_name
+ let basename = moduleNameUserString mod_name
hi = basename ++ '.':package_hisuf
case lookupFM pkg_cache hi of
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 []
- )
-
\end{code}