\begin{code}
module Finder (
- Finder, -- = ModuleName -> IO (Maybe (Module, ModuleLocation))
- newFinder, -- :: PackageConfigInfo -> IO Finder,
- ModuleLocation(..),
- mkHomeModuleLocn
+ initFinder, -- :: PackageConfigInfo -> IO (),
+ findModule -- :: ModuleName -> IO (Maybe (Module, ModuleLocation))
) where
#include "HsVersions.h"
-import HscTypes ( Finder, ModuleLocation(..) )
+import HscTypes ( ModuleLocation(..) )
import CmStaticInfo
import DriverPhases
import DriverState
import Module
import FiniteMap
import Util
-import Panic
import IOExts
import Directory
\begin{code}
-- caches contents of package directories, never expunged
-GLOBAL_VAR(pkgDirCache, Nothing, Maybe (FiniteMap String (PackageName, FilePath)))
+GLOBAL_VAR(v_PkgDirCache, error "no pkg cache!", 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
+GLOBAL_VAR(v_HomeDirCache, Nothing, Maybe (FiniteMap String FilePath))
+
+
+initFinder :: PackageConfigInfo -> IO ()
+initFinder (PackageConfigInfo pkgs) = do
+ -- expunge our home cache
+ writeIORef v_HomeDirCache Nothing
+
+ -- lazilly fill in the package cache
+ writeIORef v_PkgDirCache (unsafePerformIO (newPkgCache pkgs))
-finder :: ModuleName -> IO (Maybe (Module, ModuleLocation))
-finder name = do
+findModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
+findModule name = do
j <- maybeHomeModule name
case j of
Just home_module -> return (Just home_module)
maybeHomeModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
maybeHomeModule mod_name = do
- home_cache <- readIORef homeDirCache
+ 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 <- getDirectoryContents' path
+ return (addListToFM fm (zip 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 = moduleNameString mod_name
hs = basename ++ ".hs"
lhs = basename ++ ".lhs"
- case lookupFM home_cache hs of {
+ case lookupFM home_map hs of {
Just path -> mkHomeModuleLocn mod_name (path ++ '/':basename) hs;
Nothing ->
- case lookupFM home_cache lhs of {
+ case lookupFM home_map lhs of {
Just path -> mkHomeModuleLocn mod_name (path ++ '/':basename) lhs;
Nothing -> return Nothing
-- 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
+ ohi <- readIORef v_Output_hi
+ hisuf <- readIORef v_Hi_suf
let hifile = case ohi of
Nothing -> basename ++ '.':hisuf
Just fn -> fn
}
))
+
+newPkgCache :: [Package] -> 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
- maybe_pkg_cache <- readIORef pkgDirCache
- case maybe_pkg_cache of {
- Nothing -> panic "maybePackageModule: no pkg_cache";
- Just pkg_cache -> do
+ pkg_cache <- readIORef v_PkgDirCache
-- hi-suffix for packages depends on the build tag.
package_hisuf <-
- do tag <- readIORef build_tag
+ do tag <- readIORef v_Build_tag
if null tag
then return "hi"
else return (tag ++ "_hi")
let basename = moduleNameString mod_name
- hi = basename ++ '.':package_hisuf
+ hi = basename ++ '.':package_hisuf
case lookupFM pkg_cache hi of
Nothing -> return Nothing
}
))
- }
-
getDirectoryContents' d
= IO.catch (getDirectoryContents d)
(\_ -> do hPutStr stderr
projects / ghc-hetmet.git / blobdiff