-----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.14 2000/12/12 12:10:08 simonmar Exp $
+-- $Id: DriverUtil.hs,v 1.27 2001/08/16 11:06:10 simonmar Exp $
--
-- Utils for the driver
--
#include "HsVersions.h"
import Util
+import Panic
+import Config ( cLeadingUnderscore )
import IOExts
import Exception
import Dynamic
import RegexString
+import Directory ( getDirectoryContents )
import IO
-import System
-import Directory ( removeFile )
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 prog_name >> dump s
- dump (c:s) = hPutChar stderr c >> dump s
-
-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
-
-prog_name = unsafePerformIO (getProgName)
-{-# NOINLINE prog_name #-}
-
-instance Show BarfKind where
- showsPrec _ e = showString 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"
-{-# NOINLINE barfKindTc #-}
-instance Typeable BarfKind where
- typeOf _ = mkAppTy barfKindTc []
-
-----------------------------------------------------------------------------
-- Reading OPTIONS pragmas
-> IO [String] -- options, if any
getOptionsFromSource file
= do h <- openFile file ReadMode
- catchJust ioErrors (look h)
+ catchJust ioErrors (look h `finally` hClose h)
(\e -> if isEOFError e then return [] else ioError e)
where
look h = do
| prefixMatch "#" l -> look h
| prefixMatch "{-# LINE" l -> look h -- -}
| Just (opts:_) <- matchRegex optionRegex l
- -> return (words opts)
+ -> do rest <- look h
+ return (words opts ++ rest)
| otherwise -> return []
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 []
+ )
+
+-----------------------------------------------------------------------------
+-- Prefixing underscore to linker-level names
+prefixUnderscore :: String -> String
+prefixUnderscore
+ | cLeadingUnderscore == "YES" = ('_':)
+ | otherwise = id
+
+-----------------------------------------------------------------------------
-- Utils
+unknownFlagErr :: String -> a
+unknownFlagErr f = throwDyn (UsageError ("unrecognised flag: " ++ f))
+
my_partition :: (a -> Maybe b) -> [a] -> ([(a,b)],[a])
my_partition _ [] = ([],[])
my_partition p (a:as)
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 [] rest = Just rest
+my_prefix_match (_:_) [] = Nothing
my_prefix_match (p:pat) (r:rest)
| p == r = my_prefix_match pat rest
| otherwise = Nothing
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
xs <- readIORef var
unless (x `elem` xs) $ writeIORef var (x:xs)
-splitFilename :: String -> (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")
-splitFilename3 :: String -> (String,String,String)
+splitFilename3 :: String -> (String,String,Suffix)
splitFilename3 str
= let (dir, rest) = split_longest_prefix str '/'
(name, ext) = splitFilename rest
| otherwise = dir
in (real_dir, name, ext)
-remove_suffix :: Char -> String -> String
+remove_suffix :: Char -> String -> Suffix
remove_suffix c s
| null pre = reverse suf
| otherwise = reverse pre
(_:pre) -> (reverse pre, reverse suf)
where (suf,pre) = break (==c) (reverse s)
-newsuf :: String -> String -> String
+newsuf :: String -> Suffix -> String
newsuf suf s = remove_suffix '.' s ++ suf
-- getdir strips the filename off the input string, returning the directory.
remove_spaces = reverse . dropWhile isSpace . reverse . dropWhile isSpace
--- system that works feasibly under Windows (i.e. passes the command line to sh,
--- because system() under Windows doesn't look at SHELL, and always uses CMD.EXE)
-kludgedSystem cmd phase_name
- = do
-#ifndef mingw32_TARGET_OS
- exit_code <- system cmd `catchAllIO`
- (\_ -> throwDyn (PhaseFailed phase_name (ExitFailure 1)))
-#else
- pid <- myGetProcessID
- let tmp = "/tmp/sh" ++ show pid
- h <- openFile tmp WriteMode
- hPutStrLn h cmd
- hClose h
- exit_code <- system ("sh - " ++ tmp) `catchAllIO`
- (\_ -> removeFile tmp >>
- throwDyn (PhaseFailed phase_name (ExitFailure 1)))
- removeFile tmp
-#endif
- return exit_code