-----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.1 2000/10/11 11:54:58 simonmar Exp $
+-- $Id: DriverUtil.hs,v 1.11 2000/11/20 16:28:29 simonmar Exp $
--
-- Utils for the driver
--
#include "HsVersions.h"
-import Config
import Util
import IOExts
import Exception
import Dynamic
+import RegexString
import IO
import System
-import Directory
import List
import Char
import Monad
short_usage = "Usage: For basic information, try the `--help' option."
+GLOBAL_VAR(v_Path_usage, "", String)
+
long_usage = do
- let usage_file = "ghc-usage.txt"
- usage_path = findFile usage_file (cGHC_DRIVER_DIR ++ '/':usage_file)
+ 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 ('$':'$':s) = hPutStr stderr prog_name >> dump s
dump (c:s) = hPutChar stderr c >> dump s
-version_str = cProjectVersion
-
data BarfKind
= PhaseFailed String ExitCode
| Interrupted
| OtherError String -- just prints the error message
deriving Eq
-GLOBAL_VAR(prog_name, "ghc", String)
-
-get_prog_name = unsafePerformIO (readIORef prog_name) -- urk!
+prog_name = unsafePerformIO (getProgName)
+{-# NOINLINE prog_name #-}
instance Show BarfKind where
- showsPrec _ e = showString get_prog_name . showString ": " . showBarf e
+ 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"
+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 []
-----------------------------------------------------------------------------
--- Finding files in the installation
-
-GLOBAL_VAR(topDir, clibdir, String)
-
- -- grab the last -B option on the command line, and
- -- set topDir to its value.
-setTopDir :: [String] -> IO [String]
-setTopDir args = do
- let (minusbs, others) = partition (prefixMatch "-B") args
- (case minusbs of
- [] -> writeIORef topDir clibdir
- some -> writeIORef topDir (drop 2 (last some)))
- return others
-
-findFile name alt_path = unsafePerformIO (do
- top_dir <- readIORef topDir
- let installed_file = top_dir ++ '/':name
- let inplace_file = top_dir ++ '/':cCURRENT_DIR ++ '/':alt_path
- b <- doesFileExist inplace_file
- if b then return inplace_file
- else return installed_file
- )
+-- 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)
+ 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 []
+
+optionRegex = mkRegex "\\{-#[ \t]+OPTIONS[ \t]+(.*)#-\\}" -- -}
-----------------------------------------------------------------------------
-- Utils
| p == r = my_prefix_match pat rest
| otherwise = Nothing
-prefixMatch :: Eq a => [a] -> [a] -> Bool
-prefixMatch [] _str = True
-prefixMatch _pat [] = False
-prefixMatch (p:ps) (s:ss) | p == s = prefixMatch ps ss
- | otherwise = False
-
-postfixMatch :: String -> String -> Bool
-postfixMatch pat str = prefixMatch (reverse pat) (reverse str)
-
later = flip finally
handleDyn :: Typeable ex => (ex -> IO a) -> IO a -> IO a
xs <- readIORef var
unless (x `elem` xs) $ writeIORef var (x:xs)
+splitFilename :: String -> (String,String)
+splitFilename f = split_longest_prefix f '.'
+
+-- "foo/bar/xyzzy.ext" -> ("foo/bar", "xyzzy", ".ext")
+splitFilename3 :: String -> (String,String,String)
+splitFilename3 str
+ = let (dir, rest) = split_longest_prefix str '/'
+ (name, ext) = splitFilename rest
+ real_dir | null dir = "."
+ | otherwise = dir
+ in (real_dir, name, ext)
+
remove_suffix :: Char -> String -> String
remove_suffix c s
| null pre = reverse suf
take_longest_prefix s c = reverse pre
where (_suf,pre) = break (==c) (reverse s)
+-- split a string at the last occurence of 'c', returning the two
+-- parts of the string with the 'c' removed. If the string contains
+-- no 'c's, the entire string is returned in the second component.
+split_longest_prefix :: String -> Char -> (String,String)
+split_longest_prefix s c
+ = case pre of
+ [] -> ([], reverse suf)
+ (_:pre) -> (reverse pre, reverse suf)
+ where (suf,pre) = break (==c) (reverse s)
+
newsuf :: String -> String -> String
newsuf suf s = remove_suffix '.' s ++ suf
remove_spaces :: String -> String
remove_spaces = reverse . dropWhile isSpace . reverse . dropWhile isSpace
-
-booter_version
- = case "\
- \ __GLASGOW_HASKELL__" of
- ' ':n:ns -> n:'.':ns
- ' ':m -> m
-
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