module Finder (
initFinder, -- :: [PackageConfig] -> IO (),
findModule, -- :: ModuleName -> IO (Maybe (Module, ModuleLocation))
- mkHomeModuleLocn, -- :: ModuleName -> String -> Maybe FilePath
+ findModuleDep, -- :: ModuleName -> Bool -> IO (Maybe (Module, ModuleLocation))
+ findPackageModule, -- :: ModuleName -> IO (Maybe (Module, ModuleLocation))
+ mkHomeModuleLocn, -- :: ModuleName -> String -> FilePath
-- -> IO ModuleLocation
emptyHomeDirCache, -- :: IO ()
flushPackageCache -- :: [PackageConfig] -> IO ()
#include "HsVersions.h"
import HscTypes ( ModuleLocation(..) )
-import CmStaticInfo
+import Packages ( PackageConfig(..) )
import DriverPhases
import DriverState
import DriverUtil
import Module
-import FiniteMap
import FastString
-import Util
-import Panic ( panic )
import Config
import IOExts
import Directory
import IO
import Monad
-import Outputable
\end{code}
The Finder provides a thin filesystem abstraction to the rest of the
-compiler. For a given module, it knows (a) which package the module
-lives in, so it can make a Module from a ModuleName, and (b) where the
-source, interface, and object files for a module live.
+compiler. For a given module, it knows (a) whether the module lives
+in the home package or in another package, so it can make a Module
+from a ModuleName, and (b) where the source, interface, and object
+files for a module live.
+
+It does *not* know which particular package a module lives in, because
+that information is only contained in the interface file.
\begin{code}
initFinder :: [PackageConfig] -> IO ()
emptyHomeDirCache = return ()
findModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
-findModule name
- = do { j <- maybeHomeModule name
+findModule name = findModuleDep name False
+
+findModuleDep :: ModuleName -> Bool -> IO (Maybe (Module, ModuleLocation))
+findModuleDep name is_source
+ = do { j <- maybeHomeModule name is_source
; case j of
Just home_module -> return (Just home_module)
- Nothing -> maybePackageModule name
+ Nothing -> findPackageMod name False
}
-maybeHomeModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
-maybeHomeModule mod_name = do
+maybeHomeModule :: ModuleName -> Bool -> IO (Maybe (Module, ModuleLocation))
+maybeHomeModule mod_name is_source = do
home_path <- readIORef v_Import_paths
+ hisuf <- readIORef v_Hi_suf
+ mode <- readIORef v_GhcMode
let mod_str = moduleNameUserString mod_name
basename = map (\c -> if c == '.' then '/' else c) mod_str
- hs = basename ++ ".hs"
- lhs = 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
- }}}}}
-
-
-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
- }
- ))
+
+ -- In compilation manager modes, we look for source files in the home
+ -- package because we can compile these automatically. In one-shot
+ -- compilation mode we look for .hi files only.
+ --
+ -- When generating dependencies, we're interested in either category.
+ --
+ source_exts =
+ [ ("hs", \ fName path -> mkHomeModuleLocn mod_name path fName)
+ , ("lhs", \ fName path -> mkHomeModuleLocn mod_name path fName)
+ ]
+ hi_exts = [ (hisuf, \ fName path -> mkHiOnlyModuleLocn mod_name fName) ]
+
+ std_exts
+ | mode == DoMkDependHS = hi_exts ++ source_exts
+ | isCompManagerMode mode = source_exts
+ | otherwise = hi_exts
+
+ -- last chance: .hi-boot-<ver> and .hi-boot
+ hi_boot_ver = "hi-boot-" ++ cHscIfaceFileVersion
+
+ boot_exts =
+ [ (hi_boot_ver, \ fName path -> mkHiOnlyModuleLocn mod_name fName)
+ , ("hi-boot", \ fName path -> mkHiOnlyModuleLocn mod_name fName)
+ ]
+
+ searchPathExts home_path basename
+ (if is_source then (boot_exts++std_exts) else std_exts ++ boot_exts)
+ -- for SOURCE imports, check the hi-boot extensions
+ -- before the source/iface ones, to avoid
+ -- creating circ Makefile deps.
+
+mkHiOnlyModuleLocn mod_name hi_file =
+ return
+ ( 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
+mkHomeModuleLocn mod_name
+ basename -- everything but the extension
+ source_fn -- full path to the source (required)
+ = do
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
+ -- take the *last* component of the module name (if a hierarchical name),
+ -- and append it to the directory to get the .hi file name.
+ let (_,mod_str) = split_longest_prefix (moduleNameUserString mod_name) (=='.')
+ hi_filename = mod_str ++ '.':hisuf
+ hi_path | Just d <- hidir = d
+ | otherwise = getdir basename
+ hi = hi_path ++ '/':hi_filename
-- 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) >>= osuf_ify
- return (Just (mkHomeModule mod_name,
- ModuleLocation{
- 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
+ return (mkHomeModule mod_name,
+ ModuleLocation{ ml_hspp_file = Nothing
+ , ml_hs_file = Just source_fn
+ , ml_hi_file = hi
+ , ml_obj_file = Just o_file
+ })
+
+findPackageMod :: ModuleName
+ -> Bool
+ -> IO (Maybe (Module, ModuleLocation))
+findPackageMod mod_name hiOnly = do
pkgs <- getPackageInfo
- -- hi-suffix for packages depends on the build tag.
+ -- hi-suffix for packages depends on the build tag.
package_hisuf <-
do tag <- readIORef v_Build_tag
if null tag
then return "hi"
else return (tag ++ "_hi")
-
- let basename = moduleNameUserString mod_name
- hi = basename ++ '.':package_hisuf
-
- found <- findOnPackagePath pkgs hi
- case found of
- Nothing -> return Nothing
- Just (pkg_name,path) ->
- return (Just (mkModule mod_name pkg_name,
- ModuleLocation{
- ml_hspp_file = Nothing,
- ml_hs_file = Nothing,
- ml_hi_file = path,
- ml_obj_file = Nothing
- }
- ))
-
-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
+ let imp_dirs = concatMap import_dirs pkgs
+ mod_str = moduleNameUserString mod_name
+ basename = map (\c -> if c == '.' then '/' else c) mod_str
+
+ retPackageModule mod_name mbFName path =
+ return ( mkPackageModule mod_name
+ , ModuleLocation{ ml_hspp_file = Nothing
+ , ml_hs_file = mbFName
+ , ml_hi_file = path ++ '.':package_hisuf
+ , ml_obj_file = Nothing
+ })
+
+ searchPathExts
+ imp_dirs basename
+ ((package_hisuf,\ fName path -> retPackageModule mod_name Nothing path) :
+ -- can packages contain hi-boots?
+ (if hiOnly then [] else
+ [ ("hs", \ fName path -> retPackageModule mod_name (Just fName) path)
+ , ("lhs", \ fName path -> retPackageModule mod_name (Just fName) 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
+
+findPackageModule :: ModuleName -> IO (Maybe (Module, ModuleLocation))
+findPackageModule mod_name = findPackageMod mod_name True
+
+searchPathExts :: [FilePath]
+ -> String
+ -> [(String, FilePath -> String -> IO (Module, ModuleLocation))]
+ -> IO (Maybe (Module, ModuleLocation))
+searchPathExts path basename exts = search path
+ where
+ 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 file base
+ else loop exts
\end{code}
projects / ghc-hetmet.git / blobdiff