diff options
Diffstat (limited to 'src/compiler/GF/Compile')
| -rw-r--r-- | src/compiler/GF/Compile/GetGrammar.hs | 74 |
1 files changed, 61 insertions, 13 deletions
diff --git a/src/compiler/GF/Compile/GetGrammar.hs b/src/compiler/GF/Compile/GetGrammar.hs index c85f9588f..c7fea11b0 100644 --- a/src/compiler/GF/Compile/GetGrammar.hs +++ b/src/compiler/GF/Compile/GetGrammar.hs @@ -30,23 +30,71 @@ import Data.List (nub) import qualified Data.ByteString.Char8 as BS import Control.Monad (foldM) import System.Cmd (system) +import System.Directory(removeFile) getSourceModule :: Options -> FilePath -> IOE SourceModule getSourceModule opts file0 = ioe $ - catch (do file <- foldM runPreprocessor file0 (flag optPreprocessors opts) - content <- BS.readFile file - case runP pModDef content of - Left (Pn l c,msg) -> return (Bad (file++":"++show l++":"++show c++": "++msg)) - Right mo -> return (Ok (addOptionsToModule opts mo))) - (\e -> return (Bad (show e))) + do tmp <- foldM runPreprocessor (Source file0) (flag optPreprocessors opts) + content <- keepTemp tmp + case runP pModDef content of + Left (Pn l c,msg) -> do file <- writeTemp tmp + let location = file++":"++show l++":"++show c + return (Bad (location++": "++msg)) + Right mo -> do removeTemp tmp + return (Ok (addOptionsToModule opts mo)) + `catch` (return . Bad . show) addOptionsToModule :: Options -> SourceModule -> SourceModule addOptionsToModule opts = mapSourceModule (\m -> m { flags = flags m `addOptions` opts }) --- FIXME: should use System.IO.openTempFile -runPreprocessor :: FilePath -> String -> IO FilePath -runPreprocessor file0 p = do - let tmp = "_gf_preproc.tmp" - cmd = p +++ file0 ++ ">" ++ tmp - system cmd - return tmp +runPreprocessor :: Temporary -> String -> IO Temporary +runPreprocessor tmp0 p = + maybe external internal (lookup p builtin_preprocessors) + where + internal preproc = (Internal . preproc) `fmap` readTemp tmp0 + external = + do file0 <- writeTemp tmp0 + -- FIXME: should use System.IO.openTempFile + let file1a = "_gf_preproc.tmp" + file1b = "_gf_preproc2.tmp" + -- file0 and file1 must be different + file1 = if file0==file1a then file1b else file1a + cmd = p +++ file0 ++ ">" ++ file1 + system cmd + return (Temp file1) + +-------------------------------------------------------------------------------- + +builtin_preprocessors = [("mkPresent",mkPresent),("mkMinimal",mkMinimal)] + +mkPresent = omit_lines "--# notpresent" -- grep -v "\-\-\# notpresent" +mkMinimal = omit_lines "--# notminimal" -- grep -v "\-\-\# notminimal" + +omit_lines s = BS.unlines . filter (not . BS.isInfixOf bs) . BS.lines + where bs = BS.pack s + +-------------------------------------------------------------------------------- + +data Temporary = Source FilePath | Temp FilePath | Internal BS.ByteString + +writeTemp tmp = + case tmp of + Source path -> return path + Temp path -> return path + Internal str -> do -- FIXME: should use System.IO.openTempFile + let tmp = "_gf_preproc.tmp" + BS.writeFile tmp str + return tmp + +readTemp tmp = do str <- keepTemp tmp + removeTemp tmp + return str + +keepTemp tmp = + case tmp of + Source path -> BS.readFile path + Temp path -> BS.readFile path + Internal str -> return str + +removeTemp (Temp path) = removeFile path +removeTemp _ = return ()
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