\begin{code}
module Finder (
- Finder, -- = ModuleName -> IO (Maybe (Module, ModuleLocation))
- newFinder, -- :: PackageConfigInfo -> IO Finder,
- ModuleLocation(..),
- mkHomeModuleLocn
+ initFinder, -- :: [PackageConfig] -> IO (),
+ findModule, -- :: ModuleName -> IO (Maybe (Module, ModuleLocation))
+ mkHomeModuleLocn, -- :: ModuleName -> String -> Maybe FilePath
+ -- -> IO ModuleLocation
+ emptyHomeDirCache, -- :: IO ()
+ flushPackageCache -- :: [PackageConfig] -> IO ()
) where
#include "HsVersions.h"
+import HscTypes ( ModuleLocation(..) )
import CmStaticInfo
import DriverPhases
import DriverState
+import DriverUtil
import Module
import FiniteMap
+import FastString
import Util
-import Panic
+import Panic ( panic )
+import Config
import IOExts
-import Directory
import List
+import Directory
import IO
import Monad
+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}
-type Finder = ModuleName -> IO (Maybe (Module, ModuleLocation))
-
--- For a module in another package, the hs_file and obj_file
--- components of ModuleLocation are undefined.
-
--- The locations specified by a ModuleLocation may or may not
--- correspond to actual files yet: for example, even if the object
--- file doesn't exist, the ModuleLocation still contains the path to
--- where the object file will reside if/when it is created.
-
-data ModuleLocation
- = ModuleLocation {
- hs_file :: FilePath,
- hi_file :: FilePath,
- obj_file :: FilePath
- }
-
--- caches contents of package directories, never expunged
-GLOBAL_VAR(pkgDirCache, Nothing, Maybe (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
-
-
-finder :: ModuleName -> IO (Maybe (Module, ModuleLocation))
-finder name = do
- j <- maybeHomeModule name
- case j of
- Just home_module -> return (Just home_module)
- Nothing -> maybePackageModule name
+initFinder :: [PackageConfig] -> IO ()
+initFinder pkgs = return ()
+
+-- empty, and lazilly fill in the package cache
+flushPackageCache :: [PackageConfig] -> IO ()
+flushPackageCache pkgs = return ()
+
+emptyHomeDirCache :: IO ()
+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
+ }
maybeHomeModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
maybeHomeModule mod_name = do
- home_cache <- readIORef homeDirCache
+ home_path <- readIORef v_Import_paths
- let basename = moduleNameString 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_cache hs of {
- Just path -> mkHomeModuleLocn mod_name (path ++ '/':basename) hs;
- Nothing ->
-
- case lookupFM home_cache lhs of {
- Just path -> mkHomeModuleLocn mod_name (path ++ '/':basename) lhs;
+ found <- findOnPath home_path hs
+ case found of {
+ -- special case to avoid getting "./foo.hs" all the time
+ Just "." -> mkHomeModuleLocn mod_name basename (Just hs);
+ Just path -> mkHomeModuleLocn mod_name
+ (path ++ '/':basename) (Just (path ++ '/':hs));
+ Nothing -> do
+
+ found <- findOnPath home_path lhs
+ case found of {
+ -- special case to avoid getting "./foo.hs" all the time
+ Just "." -> mkHomeModuleLocn mod_name basename (Just lhs);
+ Just path -> mkHomeModuleLocn mod_name
+ (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
+ 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
+ found <- findOnPath home_path hi_boot_ver
+ case found of {
+ Just path -> mkHiOnlyModuleLocn mod_name hi;
+ Nothing -> do
+ found <- findOnPath home_path hi_boot
+ case found of {
+ Just path -> mkHiOnlyModuleLocn mod_name hi;
Nothing -> return Nothing
+ }}}}}
- }}
-mkHomeModuleLocn mod_name basename source_fn = do
+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 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 output_hi
- hisuf <- readIORef hi_suf
- let hifile = case ohi of
- Nothing -> basename ++ hisuf
- Just fn -> fn
+ hisuf <- readIORef v_Hi_suf
+ 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)
+ o_file <- odir_ify (basename ++ '.':phaseInputExt Ln) >>= osuf_ify
return (Just (mkHomeModule mod_name,
ModuleLocation{
- hs_file = source_fn,
- hi_file = hifile,
- obj_file = o_file
+ ml_hspp_file = Nothing,
+ ml_hs_file = maybe_source_fn,
+ ml_hi_file = hi_file,
+ ml_obj_file = Just o_file
}
))
+
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
+ pkgs <- getPackageInfo
-- 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
+ let basename = moduleNameUserString mod_name
+ 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{
- hs_file = error "package module; no source",
- hi_file = hi,
- obj_file = error "package module; no object"
+ ml_hspp_file = Nothing,
+ ml_hs_file = Nothing,
+ ml_hi_file = path,
+ ml_obj_file = Nothing
}
))
- }
-
-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 ++ '/':file))
+
+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