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make it possible to merge PGF files in the compiler

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krangelov
2021-12-22 10:47:22 +01:00
parent c4bd898dc0
commit 12b4958b99
10 changed files with 165 additions and 75 deletions
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54
src/compiler/GF/Command/Importing.hs
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@@ -1,6 +1,7 @@
module GF.Command.Importing (importGrammar, importSource) where
import PGF2
import PGF2.Transactions
import GF.Compile
import GF.Compile.Multi (readMulti)
@@ -21,35 +22,32 @@ import Control.Monad(foldM)
-- import a grammar in an environment where it extends an existing grammar
importGrammar :: Maybe PGF -> Options -> [FilePath] -> IO (Maybe PGF)
importGrammar pgf0 _ [] = return pgf0
importGrammar pgf0 opts files =
case takeExtensions (last files) of
".cf" -> fmap Just $ importCF opts files getBNFCRules bnfc2cf
".ebnf" -> fmap Just $ importCF opts files getEBNFRules ebnf2cf
".gfm" -> do
ascss <- mapM readMulti files
let cs = concatMap snd ascss
importGrammar pgf0 opts cs
s | elem s [".gf",".gfo"] -> do
res <- tryIOE $ compileToPGF opts files
case res of
Ok pgf2 -> ioUnionPGF pgf0 pgf2
Bad msg -> do putStrLn ('\n':'\n':msg)
return pgf0
".pgf" -> do
mapM readPGF files >>= foldM ioUnionPGF pgf0
".ngf" -> do
mapM readNGF files >>= foldM ioUnionPGF pgf0
ext -> die $ "Unknown filename extension: " ++ show ext
importGrammar pgf0 _ [] = return pgf0
importGrammar pgf0 opts fs
| all (extensionIs ".cf") fs = fmap Just $ importCF opts fs getBNFCRules bnfc2cf
| all (extensionIs ".ebnf") fs = fmap Just $ importCF opts fs getEBNFRules ebnf2cf
| all (extensionIs ".gfm") fs = do
ascss <- mapM readMulti fs
let cs = concatMap snd ascss
importGrammar pgf0 opts cs
| all (\f -> extensionIs ".gf" f || extensionIs ".gfo" f) fs = do
res <- tryIOE $ compileToPGF opts pgf0 fs
case res of
Ok pgf -> return (Just pgf)
Bad msg -> do putStrLn ('\n':'\n':msg)
return pgf0
| all (extensionIs ".pgf") fs = foldM importPGF pgf0 fs
| all (extensionIs ".ngf") fs = do
case fs of
[f] -> fmap Just $ readNGF f
_ -> die $ "Only one .ngf file could be loaded at a time"
| otherwise = die $ "Don't know what to do with these input files: " ++ unwords fs
where
extensionIs ext = (== ext) . takeExtension
ioUnionPGF :: Maybe PGF -> PGF -> IO (Maybe PGF)
ioUnionPGF Nothing two = return (Just two)
ioUnionPGF (Just one) two =
case unionPGF one two of
Nothing -> putStrLn "Abstract changed, previous concretes discarded." >> return (Just two)
Just pgf -> return (Just pgf)
unionPGF = error "TODO: unionPGF"
importPGF :: Maybe PGF -> FilePath -> IO (Maybe PGF)
importPGF Nothing f = fmap Just (readPGF f)
importPGF (Just pgf) f = fmap Just (modifyPGF pgf (mergePGF f))
importSource :: Options -> [FilePath] -> IO SourceGrammar
importSource opts files = fmap (snd.snd) (batchCompile opts files)