mirror of
https://github.com/GrammaticalFramework/gf-core.git
synced 2026-04-09 04:59:31 -06:00
267 lines
8.6 KiB
Haskell
267 lines
8.6 KiB
Haskell
module ReadFiles
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--- where
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--
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(
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--
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getAllFiles,fixNewlines,ModName,getOptionsFromFile,
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--
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gfcFile,gfFile,gfrFile,isGFC,resModName) where
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import Arch (selectLater, modifiedFiles, ModTime, getModTime,laterModTime)
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import Option
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import Operations
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import UseIO
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import System
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import Char
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import Monad
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import List
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-- make analysis for GF grammar modules. AR 11/6/2003--24/2/2004
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-- to find all files that have to be read, put them in dependency order, and
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-- decide which files need recompilation. Name file.gf is returned for them,
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-- and file.gfc or file.gfr otherwise.
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type ModName = String
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type ModEnv = [(ModName,ModTime)]
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getAllFiles :: Options -> [InitPath] -> ModEnv -> FileName -> IOE [FullPath]
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getAllFiles opts ps env file = do
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-- read module headers from all files recursively
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ds0 <- getImports ps file
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let ds = [((snd m,map fst ms),p) | ((m,ms),p) <- ds0]
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ioeIO $ putStrLn $ "all modules:" +++ show (map (fst . fst) ds)
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-- get a topological sorting of files: returns file names --- deletes paths
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ds1 <- ioeErr $ either
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return
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(\ms -> Bad $ "circular modules" +++
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unwords (map show (head ms))) $ topoTest $ map fst ds
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-- associate each file name with its path --- more optimal: save paths in ds1
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let paths = [(f,p) | ((f,_),p) <- ds]
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let pds1 = [(p,f) | f <- ds1, Just p <- [lookup f paths]]
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if oElem fromSource opts
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then return [gfFile (prefixPathName p f) | (p,f) <- pds1]
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else do
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ds2 <- ioeIO $ mapM (selectFormat env) pds1
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let ds4 = needCompile opts (map fst ds0) ds2
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return ds4
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-- to decide whether to read gf or gfc, or if in env; returns full file path
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data CompStatus =
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CSComp -- compile: read gf
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| CSRead -- read gfc
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| CSEnv -- gfc is in env
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| CSEnvR -- also gfr is in env
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| CSDont -- don't read at all
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| CSRes -- read gfr
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deriving (Eq,Show)
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selectFormat :: ModEnv -> (InitPath,ModName) -> IO (ModName,(InitPath,CompStatus))
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selectFormat env (p,f) = do
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let pf = prefixPathName p f
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let mtenv = lookup f env -- Nothing if f is not in env
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let rtenv = lookup (resModName f) env
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mtgfc <- getModTime $ gfcFile pf
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mtgf <- getModTime $ gfFile pf
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let stat = case (rtenv,mtenv,mtgfc,mtgf) of
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(Just tenv,_,_,Just tgf) | laterModTime tenv tgf -> CSEnvR
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(_,Just tenv,_,Just tgf) | laterModTime tenv tgf -> CSEnv
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(_,_,Just tgfc,Just tgf) | laterModTime tgfc tgf -> CSRead
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_ -> CSComp
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return $ (f, (p,stat))
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needCompile :: Options ->
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[ModuleHeader] -> [(ModName,(InitPath,CompStatus))] -> [FullPath]
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needCompile opts headers sfiles0 = paths $ res $ mark $ iter changed where
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deps = [(snd m,map fst ms) | (m,ms) <- headers]
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typ m = maybe MTyOther id $ lookup m [(m,t) | ((t,m),_) <- headers]
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uses m = [(n,u) | ((_,n),ms) <- headers, (k,u) <- ms, k==m]
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stat0 m = maybe CSComp snd $ lookup m sfiles0
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allDeps = [(m,iterFix add ms) | (m,ms) <- deps] where
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add os = [m | o <- os, Just n <- [lookup o deps],m <- n]
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-- only treat reused, interface, or instantiation if needed
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sfiles = map relevant sfiles0
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relevant fp@(f,(p,st)) =
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let us = uses f in
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if not (all noComp us) then
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fp else
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if (typ f == MTyIncomplete || (not (null us) && all isAux us)) then
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(f,(p,CSDont)) else
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fp
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isAux = flip elem [MUReuse,MUInstance,MUComplete] . snd
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noComp = flip elem [CSRead,CSEnv,CSEnvR] . stat0 . fst
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-- start with the changed files themselves; returns [ModName]
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changed = [f | (f,(_,CSComp)) <- sfiles]
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-- add other files that depend on some changed file; returns [ModName]
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iter np = let new = [f | (f,fs) <- deps,
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not (elem f np), any (flip elem np) fs]
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in if null new then np else (iter (new ++ np))
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-- for each module in the full list, compile if depends on what needs compile
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-- returns [FullPath]
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mark cs = [(f,(path,st)) |
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(f,(path,st0)) <- sfiles,
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let st = if (elem f cs) then CSComp else st0]
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-- if a compilable file depends on a resource, read gfr instead of gfc/env
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-- but don't read gfr if already in env (by CSEnvR)
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-- Also read res if the option "retain" is present
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res cs = map mkRes cs where
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mkRes x@(f,(path,st)) | elem st [CSRead,CSEnv] = case typ f of
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MTyResource | not (null [m | (m,(_,CSComp)) <- cs,
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Just ms <- [lookup m allDeps], elem f ms])
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|| oElem retainOpers opts
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-> (f,(path,CSRes))
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_ -> x
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mkRes x = x
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-- construct list of paths to read
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paths cs = [mkName f p st | (f,(p,st)) <- cs, elem st [CSComp, CSRead,CSRes]]
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mkName f p st = mk $ prefixPathName p f where
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mk = case st of
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CSComp -> gfFile
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CSRead -> gfcFile
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CSRes -> gfrFile
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isGFC = (== "gfc") . fileSuffix
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gfcFile = suffixFile "gfc"
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gfrFile = suffixFile "gfr"
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gfFile = suffixFile "gf"
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resModName = ('#':)
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-- to get imports without parsing the whole files
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getImports :: [InitPath] -> FileName -> IOE [(ModuleHeader,InitPath)]
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getImports ps = get [] where
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get ds file = do
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let name = fileBody file
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(p,s) <- readFileIfPath ps $ file
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let ((typ,mname),imps) = importsOfFile s
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ioeErr $ testErr (mname == name) $
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"module name differs from file name in" +++ name
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case imps of
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_ | elem name (map (snd . fst . fst) ds) -> return ds --- file already read
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[] -> return $ (((typ,name),[]),p):ds
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_ -> do
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let files = map (gfFile . fst) imps --- requires there's always .gf file
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foldM get ((((typ,name),imps),p):ds) files
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-- internal module dep information
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data ModUse =
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MUReuse
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| MUInstance
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| MUComplete
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| MUOther
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deriving (Eq,Show)
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data ModTyp =
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MTyResource
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| MTyIncomplete
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| MTyOther
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deriving (Eq,Show)
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type ModuleHeader = ((ModTyp,ModName),[(ModName,ModUse)])
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importsOfFile :: String -> ModuleHeader
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importsOfFile =
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getModuleHeader . -- analyse into mod header
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filter (not . spec) . -- ignore keywords and special symbols
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unqual . -- take away qualifiers
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unrestr . -- take away union restrictions
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takeWhile (not . term) . -- read until curly or semic
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lexs . -- analyse into lexical tokens
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unComm -- ignore comments before the headed line
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where
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term = flip elem ["{",";"]
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spec = flip elem ["of", "open","in",":", "->","=", "(", ")",",","**","union"]
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unqual ws = case ws of
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"(":q:ws' -> unqual ws'
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w:ws' -> w:unqual ws'
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_ -> ws
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unrestr ws = case ws of
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"[":ws' -> unrestr $ tail $ dropWhile (/="]") ws'
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w:ws' -> w:unrestr ws'
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_ -> ws
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getModuleHeader :: [String] -> ModuleHeader -- with, reuse
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getModuleHeader ws = case ws of
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"incomplete":ws2 -> let ((_,name),us) = getModuleHeader ws2 in
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((MTyIncomplete,name),us)
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"interface":ws2 -> let ((_,name),us) = getModuleHeader ("resource":ws2) in
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((MTyIncomplete,name),us)
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"resource":name:ws2 -> case ws2 of
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"reuse":m:_ -> ((MTyResource,name),[(m,MUReuse)])
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m:"with":ms -> ((MTyResource,name),(m,MUOther):[(n,MUComplete) | n <- ms])
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ms -> ((MTyResource,name),[(n,MUOther) | n <- ms])
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"instance":name:m:ws2 -> case ws2 of
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"reuse":n:_ -> ((MTyResource,name),(m,MUInstance):[(n,MUReuse)])
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n:"with":ms ->
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((MTyResource,name),(m,MUInstance):(n,MUComplete):[(n,MUOther) | n <- ms])
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ms -> ((MTyResource,name),(m,MUInstance):[(n,MUOther) | n <- ms])
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_:name:ws2 -> case ws2 of
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"reuse":m:_ -> ((MTyOther,name),[(m,MUReuse)])
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m:n:"with":ms ->
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((MTyOther,name),(m,MUInstance):(n,MUOther):[(n,MUComplete) | n <- ms])
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m:"with":ms -> ((MTyOther,name),(m,MUOther):[(n,MUComplete) | n <- ms])
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ms -> ((MTyOther,name),[(n,MUOther) | n <- ms])
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unComm s = case s of
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'-':'-':cs -> unComm $ dropWhile (/='\n') cs
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'{':'-':cs -> dpComm cs
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c:cs -> c : unComm cs
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_ -> s
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dpComm s = case s of
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'-':'}':cs -> unComm cs
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c:cs -> dpComm cs
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_ -> s
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lexs s = x:xs where
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(x,y) = head $ lex s
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xs = if null y then [] else lexs y
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-- options can be passed to the compiler by comments in --#, in the main file
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getOptionsFromFile :: FilePath -> IO Options
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getOptionsFromFile file = do
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s <- readFileIf file
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let ls = filter (isPrefixOf "--#") $ lines s
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return $ fst $ getOptions "-" $ map (unwords . words . drop 3) ls
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-- old GF tolerated newlines in quotes. No more supported!
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fixNewlines s = case s of
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'"':cs -> '"':mk cs
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c :cs -> c:fixNewlines cs
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_ -> s
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where
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mk s = case s of
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'\\':'"':cs -> '\\':'"': mk cs
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'"' :cs -> '"' :fixNewlines cs
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'\n' :cs -> '\\':'n': mk cs
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c :cs -> c : mk cs
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_ -> s
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