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|
module System.CurryPath
( ModuleIdent
, splitProgramName, splitValidProgramName, isValidModuleName
, runModuleAction, runModuleActionQuiet
, splitModuleFileName, splitModuleIdentifiers , joinModuleIdentifiers
, stripCurrySuffix
, ModulePath, modNameToPath
, currySubdir, inCurrySubdir, inCurrySubdirModule, addCurrySubdir
, sysLibPath, getLoadPathForModule
, lookupModuleSourceInLoadPath, lookupModuleSource
, curryModulesInDirectory, curryrcFileName
, setCurryPath
) where
import Control.Monad ( unless, when )
import Curry.Compiler.Distribution
( curryCompiler, curryCompilerMajorVersion
, curryCompilerMinorVersion
, curryCompilerRevisionVersion
, installDir )
import Data.List ( init, intercalate, last, split )
import System.Directory ( doesDirectoryExist, doesFileExist
, getCurrentDirectory, getDirectoryContents
, getHomeDirectory, setCurrentDirectory )
import System.Environment ( getEnv, setEnv )
import System.FilePath ( FilePath, (</>), (<.>), addTrailingPathSeparator
, dropFileName, joinPath, splitDirectories
, splitExtension, splitFileName, splitPath
, splitSearchPath, takeExtension, dropExtension
)
import System.IOExts ( evalCmd )
import System.Path ( getFileInPath )
import Data.PropertyFile ( getPropertyFromFile )
type ModuleIdent = String
splitProgramName :: String -> (FilePath, ModuleIdent)
splitProgramName s
| null ps
= (".", "")
| null (tail ps)
= (".", head ps)
| otherwise
= (concat (init ps), last ps)
where
ps = splitPath (stripCurrySuffix s)
splitValidProgramName :: String -> (FilePath, ModuleIdent)
splitValidProgramName s
| null mname
= error $ "The module name is empty."
| not (isValidModuleName mname)
= error $ "The program name '" ++ s ++ "' contains an invalid module name."
| otherwise
= (dir,mname)
where
(dir,mname) = splitProgramName s
isValidModuleName :: String -> Bool
isValidModuleName = all isModId . split (=='.')
where
isModId [] = False
isModId (c:cs) = isAlpha c && all (\x -> isAlphaNum x || x `elem` "_'") cs
runModuleAction :: (String -> IO a) -> String -> IO a
runModuleAction = runModuleActionWith False
runModuleActionQuiet :: (String -> IO a) -> String -> IO a
runModuleActionQuiet = runModuleActionWith True
runModuleActionWith :: Bool -> (String -> IO a) -> String -> IO a
runModuleActionWith quiet modaction progname = do
let (progdir,mname) = splitValidProgramName progname
curdir <- getCurrentDirectory
unless (progdir == ".") $ do
unless quiet $ putStrLn $ "Switching to directory '" ++ progdir ++ "'..."
setCurrentDirectory progdir
result <- modaction mname
unless (progdir == ".") $ setCurrentDirectory curdir
return result
splitModuleFileName :: ModuleIdent -> FilePath -> (FilePath, FilePath)
splitModuleFileName mid fn = case splitModuleIdentifiers mid of
[_] -> splitFileName fn
ms -> let (base, ext) = splitExtension fn
dirs = splitDirectories base
(pre , suf) = splitAt (length dirs - length ms) dirs
path = if null pre
then ""
else addTrailingPathSeparator (joinPath pre)
in (path, joinPath suf <.> ext)
splitModuleIdentifiers :: ModuleIdent -> [String]
splitModuleIdentifiers = split (=='.')
joinModuleIdentifiers :: [String] -> ModuleIdent
joinModuleIdentifiers = foldr1 combine
where combine xs ys = xs ++ '.' : ys
stripCurrySuffix :: String -> String
stripCurrySuffix s =
if takeExtension s `elem` [".curry",".lcurry"]
then dropExtension s
else s
type ModulePath = String
modNameToPath :: ModuleIdent -> String
modNameToPath = foldr1 (</>) . split (=='.')
currySubdir :: FilePath
currySubdir =
".curry" </> curryCompiler ++ "-" ++
intercalate "."
(map show [curryCompilerMajorVersion, curryCompilerMinorVersion,
curryCompilerRevisionVersion])
inCurrySubdir :: FilePath -> FilePath
inCurrySubdir filename =
let (base,file) = splitFileName filename
in base </> currySubdir </> modNameToPath file
inCurrySubdirModule :: ModuleIdent -> FilePath -> FilePath
inCurrySubdirModule m fn = let (dirP, modP) = splitModuleFileName m fn
in dirP </> currySubdir </> modP
addCurrySubdir :: FilePath -> FilePath
addCurrySubdir dir = dir </> currySubdir
sysLibPath :: [String]
sysLibPath = case curryCompiler of
"kmcc" -> [installDir </> "libs" </> "src"]
"kics" -> [installDir </> "src" </> "lib"]
_ -> [installDir </> "lib"]
getLoadPathForModule :: ModulePath -> IO [String]
getLoadPathForModule modpath = do
rcfile <- curryrcFileName
mblib <- getPropertyFromFile rcfile "libraries"
let fileDir = dropFileName modpath
currypath <- getEnv "CURRYPATH"
let llib = maybe []
(\l -> if null l then [] else splitSearchPath l)
mblib
return $ fileDir :
(if null currypath then [] else splitSearchPath currypath) ++
llib ++ sysLibPath
lookupModuleSourceInLoadPath :: ModulePath -> IO (Maybe (String,String))
lookupModuleSourceInLoadPath modpath = do
loadpath <- getLoadPathForModule modpath
lookupModuleSource loadpath modpath
lookupModuleSource :: [String] -> String -> IO (Maybe (String,String))
lookupModuleSource loadpath mods =
if isValidModuleName mod
then lookupSourceInPath loadpath
else return Nothing
where
mod = stripCurrySuffix mods
fnlcurry = modNameToPath mod ++ ".lcurry"
fncurry = modNameToPath mod ++ ".curry"
lookupSourceInPath [] = return Nothing
lookupSourceInPath (dir:dirs) = do
lcurryExists <- doesFileExist (dir </> fnlcurry)
if lcurryExists
then return (Just (dir, dir </> fnlcurry))
else do
curryExists <- doesFileExist (dir </> fncurry)
if curryExists then return (Just (dir, dir </> fncurry))
else lookupSourceInPath dirs
curryModulesInDirectory :: String -> IO [String]
curryModulesInDirectory dir = getModules "" dir
where
getModules p d = do
exdir <- doesDirectoryExist d
entries <- if exdir then getDirectoryContents d else return []
let realentries = filter (\f -> length f >= 1 && head f /= '.') entries
newprogs = filter isCurryFile realentries
subdirs <- mapM (\e -> do b <- doesDirectoryExist (d </> e)
return $ if b then [e] else [])
realentries
>>= return . concat
subdirentries <- mapM (\s -> getModules (p ++ s ++ ".") (d </> s)) subdirs
return $ map ((p ++) . stripCurrySuffix) newprogs ++ concat subdirentries
isCurryFile f = takeExtension f `elem` [".curry",".lcurry"]
curryrcFileName :: IO FilePath
curryrcFileName = getHomeDirectory >>= return . (</> rcFile)
where rcFile = '.' : curryCompiler ++ "rc"
setCurryPath :: Bool -> String -> IO ()
setCurryPath quiet cpmexec = do
cp <- getEnv "CURRYPATH"
if null cp
then
(if null cpmexec then getFileInPath "cypm" else return (Just cpmexec)) >>=
maybe
(return ())
(\cpm -> do
putStrLnNQ $
"Computing CURRYPATH with '" ++ cpm ++ "'..."
(rc,out,err) <- evalCmd cpm ["deps","--path"] ""
if rc==0
then do let cpath = strip out
putStrLnNQ $ "CURRYPATH=" ++ cpath
setEnv "CURRYPATH" cpath
else putStrLn $ "ERROR during computing CURRYPATH with 'cypm':\n"
++ out ++ err )
else putStrLnNQ $ "CURRYPATH=" ++ cp
where
putStrLnNQ s = unless quiet $ putStrLn s
strip = reverse . dropWhile isSpace . reverse . dropWhile isSpace
|