-----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.5 2000/10/27 13:50:25 sewardj Exp $
+-- $Id: DriverUtil.hs,v 1.46 2004/11/09 16:59:31 simonmar Exp $
--
-- Utils for the driver
--
--
-----------------------------------------------------------------------------
-module DriverUtil where
-
+module DriverUtil (
+ getOptionsFromSource, softGetDirectoryContents,
+ createDirectoryHierarchy, doesDirNameExist, prefixUnderscore,
+ unknownFlagErr, unknownFlagsErr, missingArgErr,
+ later, handleDyn, handle,
+ split, add, addNoDups,
+ Suffix, splitFilename, getFileSuffix,
+ splitFilename3, remove_suffix, split_longest_prefix,
+ replaceFilenameSuffix, directoryOf, filenameOf,
+ replaceFilenameDirectory, remove_spaces, escapeSpaces,
+ ) where
+
+#include "../includes/ghcconfig.h"
#include "HsVersions.h"
-import Config
import Util
+import Panic
+import Config ( cLeadingUnderscore )
-import IOExts
-import Exception
-import Dynamic
-import RegexString
+import EXCEPTION ( Exception(..), finally, throwDyn, catchDyn, throw )
+import qualified EXCEPTION as Exception
+import DYNAMIC
+import DATA_IOREF ( IORef, readIORef, writeIORef )
+import Directory
import IO
-import System
import List
import Char
import Monad
-----------------------------------------------------------------------------
--- Errors
-
-short_usage = "Usage: For basic information, try the `--help' option."
-
-GLOBAL_VAR(v_Path_usage, "", String)
-
-long_usage = do
- usage_path <- readIORef v_Path_usage
- usage <- readFile usage_path
- dump usage
- exitWith ExitSuccess
- where
- dump "" = return ()
- dump ('$':'$':s) = hPutStr stderr get_prog_name >> dump s
- dump (c:s) = hPutChar stderr c >> dump s
-
-version_str = cProjectVersion
-
-data BarfKind
- = PhaseFailed String ExitCode
- | Interrupted
- | UsageError String -- prints the short usage msg after the error
- | OtherError String -- just prints the error message
- deriving Eq
-
-GLOBAL_VAR(v_Prog_name, "ghc", String)
-
-get_prog_name = unsafePerformIO (readIORef v_Prog_name) -- urk!
-
-instance Show BarfKind where
- showsPrec _ e = showString get_prog_name . showString ": " . showBarf e
-
-showBarf (UsageError str) = showString str . showChar '\n' . showString short_usage
-showBarf (OtherError str) = showString str
-showBarf (PhaseFailed phase code) =
- showString phase . showString " failed, code = " . shows code
-showBarf (Interrupted) = showString "interrupted"
-
-unknownFlagErr f = throwDyn (UsageError ("unrecognised flag: " ++ f))
-
-barfKindTc = mkTyCon "BarfKind"
-instance Typeable BarfKind where
- typeOf _ = mkAppTy barfKindTc []
-
------------------------------------------------------------------------------
-- Reading OPTIONS pragmas
+
getOptionsFromSource
:: String -- input file
-> IO [String] -- options, if any
getOptionsFromSource file
= do h <- openFile file ReadMode
- catchJust ioErrors (look h)
- (\e -> if isEOFError e then return [] else ioError e)
+ look h `finally` hClose h
where
look h = do
- l <- hGetLine h
- case () of
- () | null l -> look h
- | prefixMatch "#" l -> look h
- | prefixMatch "{-# LINE" l -> look h -- -}
- | Just (opts:_) <- matchRegex optionRegex l
- -> return (words opts)
- | otherwise -> return []
+ r <- tryJust ioErrors (hGetLine h)
+ case r of
+ Left e | isEOFError e -> return []
+ | otherwise -> ioError e
+ Right l' -> do
+ let l = remove_spaces l'
+ case () of
+ () | null l -> look h
+ | prefixMatch "#" l -> look h
+ | prefixMatch "{-# LINE" l -> look h -- -}
+ | Just opts <- matchOptions l
+ -> do rest <- look h
+ return (words opts ++ rest)
+ | otherwise -> return []
+
+matchOptions s
+ | Just s1 <- maybePrefixMatch "{-#" s, -- -}
+ Just s2 <- maybePrefixMatch "OPTIONS" (remove_spaces s1),
+ Just s3 <- maybePrefixMatch "}-#" (reverse s2)
+ = Just (reverse s3)
+ | otherwise
+ = Nothing
-optionRegex = mkRegex "\\{-#[ \t]+OPTIONS[ \t]+(.*)#-\\}" -- -}
+-----------------------------------------------------------------------------
+-- A version of getDirectoryContents that is non-fatal if the
+-- directory doesn't exist.
+
+softGetDirectoryContents d
+ = IO.catch (getDirectoryContents d)
+ (\_ -> do hPutStrLn stderr
+ ("WARNING: error while reading directory " ++ d)
+ return []
+ )
+
+-----------------------------------------------------------------------------
+-- Create a hierarchy of directories
+
+createDirectoryHierarchy :: FilePath -> IO ()
+createDirectoryHierarchy dir = do
+ b <- doesDirectoryExist dir
+ when (not b) $ do
+ createDirectoryHierarchy (directoryOf dir)
+ createDirectory dir
+
+-----------------------------------------------------------------------------
+-- Verify that the 'dirname' portion of a FilePath exists.
+--
+doesDirNameExist :: FilePath -> IO Bool
+doesDirNameExist fpath = doesDirectoryExist (directoryOf fpath)
+
+-----------------------------------------------------------------------------
+-- Prefixing underscore to linker-level names
+prefixUnderscore :: String -> String
+prefixUnderscore
+ | cLeadingUnderscore == "YES" = ('_':)
+ | otherwise = id
-----------------------------------------------------------------------------
-- Utils
-my_partition :: (a -> Maybe b) -> [a] -> ([(a,b)],[a])
-my_partition _ [] = ([],[])
-my_partition p (a:as)
- = let (bs,cs) = my_partition p as in
- case p a of
- Nothing -> (bs,a:cs)
- Just b -> ((a,b):bs,cs)
-
-my_prefix_match :: String -> String -> Maybe String
-my_prefix_match [] rest = Just rest
-my_prefix_match (_:_) [] = Nothing
-my_prefix_match (p:pat) (r:rest)
- | p == r = my_prefix_match pat rest
- | otherwise = Nothing
+unknownFlagErr :: String -> a
+unknownFlagErr f = throwDyn (UsageError ("unrecognised flag: " ++ f))
+
+unknownFlagsErr :: [String] -> a
+unknownFlagsErr fs = throwDyn (UsageError ("unrecognised flags: " ++ unwords fs))
+
+missingArgErr :: String -> a
+missingArgErr f = throwDyn (UsageError ("missing argument for flag: " ++ f))
later = flip finally
handleDyn :: Typeable ex => (ex -> IO a) -> IO a -> IO a
handleDyn = flip catchDyn
+handle :: (Exception -> IO a) -> IO a -> IO a
+#if __GLASGOW_HASKELL__ < 501
+handle = flip Exception.catchAllIO
+#else
+handle h f = f `Exception.catch` \e -> case e of
+ ExitException _ -> throw e
+ _ -> h e
+#endif
+
split :: Char -> String -> [String]
split c s = case rest of
[] -> [chunk]
xs <- readIORef var
unless (x `elem` xs) $ writeIORef var (x:xs)
-splitFilename :: String -> (String,String)
-splitFilename f = (reverse (stripDot rev_basename), reverse rev_ext)
- where (rev_ext, rev_basename) = span ('.' /=) (reverse f)
- stripDot ('.':xs) = xs
- stripDot xs = xs
-
-remove_suffix :: Char -> String -> String
+------------------------------------------------------
+-- Filename manipulation
+------------------------------------------------------
+
+type Suffix = String
+
+splitFilename :: String -> (String,Suffix)
+splitFilename f = split_longest_prefix f (=='.')
+
+getFileSuffix :: String -> Suffix
+getFileSuffix f = drop_longest_prefix f (=='.')
+
+-- "foo/bar/xyzzy.ext" -> ("foo/bar", "xyzzy.ext")
+splitFilenameDir :: String -> (String,String)
+splitFilenameDir str
+ = let (dir, rest) = split_longest_prefix str isPathSeparator
+ real_dir | null dir = "."
+ | otherwise = dir
+ in (real_dir, rest)
+
+-- "foo/bar/xyzzy.ext" -> ("foo/bar", "xyzzy", ".ext")
+splitFilename3 :: String -> (String,String,Suffix)
+splitFilename3 str
+ = let (dir, rest) = split_longest_prefix str isPathSeparator
+ (name, ext) = splitFilename rest
+ real_dir | null dir = "."
+ | otherwise = dir
+ in (real_dir, name, ext)
+
+remove_suffix :: Char -> String -> Suffix
remove_suffix c s
- | null pre = reverse suf
+ | null pre = s
| otherwise = reverse pre
where (suf,pre) = break (==c) (reverse s)
-drop_longest_prefix :: String -> Char -> String
-drop_longest_prefix s c = reverse suf
- where (suf,_pre) = break (==c) (reverse s)
-
-take_longest_prefix :: String -> Char -> String
-take_longest_prefix s c = reverse pre
- where (_suf,pre) = break (==c) (reverse s)
+drop_longest_prefix :: String -> (Char -> Bool) -> String
+drop_longest_prefix s pred = reverse suf
+ where (suf,_pre) = break pred (reverse s)
-newsuf :: String -> String -> String
-newsuf suf s = remove_suffix '.' s ++ suf
+take_longest_prefix :: String -> (Char -> Bool) -> String
+take_longest_prefix s pred = reverse pre
+ where (_suf,pre) = break pred (reverse s)
--- getdir strips the filename off the input string, returning the directory.
-getdir :: String -> String
-getdir s = if null dir then "." else init dir
- where dir = take_longest_prefix s '/'
-
-newdir :: String -> String -> String
-newdir dir s = dir ++ '/':drop_longest_prefix s '/'
+-- split a string at the last character where 'pred' is True,
+-- returning a pair of strings. The first component holds the string
+-- up (but not including) the last character for which 'pred' returned
+-- True, the second whatever comes after (but also not including the
+-- last character).
+--
+-- If 'pred' returns False for all characters in the string, the original
+-- string is returned in the second component (and the first one is just
+-- empty).
+split_longest_prefix :: String -> (Char -> Bool) -> (String,String)
+split_longest_prefix s pred
+ = case pre of
+ [] -> ([], reverse suf)
+ (_:pre) -> (reverse pre, reverse suf)
+ where (suf,pre) = break pred (reverse s)
+
+replaceFilenameSuffix :: FilePath -> Suffix -> FilePath
+replaceFilenameSuffix s suf = remove_suffix '.' s ++ suf
+
+-- directoryOf strips the filename off the input string, returning
+-- the directory.
+directoryOf :: FilePath -> String
+directoryOf = fst . splitFilenameDir
+
+-- filenameOf strips the directory off the input string, returning
+-- the filename.
+filenameOf :: FilePath -> String
+filenameOf = snd . splitFilenameDir
+
+replaceFilenameDirectory :: FilePath -> String -> FilePath
+replaceFilenameDirectory s dir
+ = dir ++ '/':drop_longest_prefix s isPathSeparator
remove_spaces :: String -> String
remove_spaces = reverse . dropWhile isSpace . reverse . dropWhile isSpace
-booter_version
- = case "\
- \ __GLASGOW_HASKELL__" of
- ' ':n:ns -> n:'.':ns
- ' ':m -> m
+escapeSpaces :: String -> String
+escapeSpaces = foldr (\c s -> if isSpace c then '\\':c:s else c:s) ""
+isPathSeparator :: Char -> Bool
+isPathSeparator ch =
+#ifdef mingw32_TARGET_OS
+ ch == '/' || ch == '\\'
+#else
+ ch == '/'
+#endif
projects / ghc-hetmet.git / blobdiff