-----------------------------------------------------------------------------
--- $Id: DriverUtil.hs,v 1.33 2002/08/29 15:44:15 simonmar Exp $
+-- $Id: DriverUtil.hs,v 1.50 2005/01/28 12:55:37 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/config.h"
#include "HsVersions.h"
import Util
import Panic
import Config ( cLeadingUnderscore )
+import Ctype
-import EXCEPTION as Exception
+import EXCEPTION ( Exception(..), finally, throwDyn, catchDyn, throw )
+import qualified EXCEPTION as Exception
import DYNAMIC
import DATA_IOREF ( IORef, readIORef, writeIORef )
-import Directory ( getDirectoryContents, doesDirectoryExist )
+import Directory
import IO
import List
import Char
-> IO [String] -- options, if any
getOptionsFromSource file
= do h <- openFile file ReadMode
- catchJust ioErrors (look h `finally` hClose h)
- (\e -> if isEOFError e then return [] else ioError e)
+ look h `finally` hClose h
where
look h = do
- l' <- hGetLine h
- 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
+ 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 []
+ | otherwise -> return []
+-- detect {-# OPTIONS_GHC ... #-}. For the time being, we accept OPTIONS
+-- instead of OPTIONS_GHC, but that is deprecated.
matchOptions s
- | Just s1 <- my_prefix_match "{-#" s,
- Just s2 <- my_prefix_match "OPTIONS" (remove_spaces s1),
- Just s3 <- my_prefix_match "}-#" (reverse s2)
- = Just (reverse s3)
+ | Just s1 <- maybePrefixMatch "{-#" s -- -}
+ = matchOptions1 (remove_spaces s1)
| otherwise
= Nothing
+ where
+ matchOptions1 s
+ | Just s2 <- maybePrefixMatch "OPTIONS" s
+ = case () of
+ _ | Just s3 <- maybePrefixMatch "_GHC" s2, not (is_ident (head s3))
+ -> matchOptions2 s3
+ | not (is_ident (head s2))
+ -> matchOptions2 s2
+ | otherwise
+ -> Just [] -- OPTIONS_anything is ignored, not treated as start of source
+ | otherwise = Nothing
+ matchOptions2 s
+ | Just s3 <- maybePrefixMatch "}-#" (reverse s) = Just (reverse s3)
+ | otherwise = Nothing
-----------------------------------------------------------------------------
-- A version of getDirectoryContents that is non-fatal if the
)
-----------------------------------------------------------------------------
+-- 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 (getdir fpath)
-
+doesDirNameExist fpath = doesDirectoryExist (directoryOf fpath)
-----------------------------------------------------------------------------
-- Prefixing underscore to linker-level names
unknownFlagsErr :: [String] -> a
unknownFlagsErr fs = throwDyn (UsageError ("unrecognised flags: " ++ unwords fs))
-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
+missingArgErr :: String -> a
+missingArgErr f = throwDyn (UsageError ("missing argument for flag: " ++ f))
later = flip finally
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
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)
(_:pre) -> (reverse pre, reverse suf)
where (suf,pre) = break pred (reverse s)
-newsuf :: String -> Suffix -> String
-newsuf suf s = remove_suffix '.' s ++ suf
+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
--- 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 isPathSeparator
+-- filenameOf strips the directory off the input string, returning
+-- the filename.
+filenameOf :: FilePath -> String
+filenameOf = snd . splitFilenameDir
-newdir :: String -> String -> String
-newdir dir s = dir ++ '/':drop_longest_prefix s isPathSeparator
+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
projects / ghc-hetmet.git / blobdiff