-- ghc-mod: Happy Haskell Hacking -- Copyright (C) 2015 Daniel Gröber -- -- This program is free software: you can redistribute it and/or modify -- it under the terms of the GNU Affero General Public License as published by -- the Free Software Foundation, either version 3 of the License, or -- (at your option) any later version. -- -- This program is distributed in the hope that it will be useful, -- but WITHOUT ANY WARRANTY; without even the implied warranty of -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -- GNU Affero General Public License for more details. -- -- You should have received a copy of the GNU Affero General Public License -- along with this program. If not, see . {-# LANGUAGE CPP #-} module GhcMod.CabalHelper ( getComponents , getGhcMergedPkgOptions , getCabalPackageDbStack , prepareCabalHelper , withAutogen , withCabal ) where import Control.Applicative import Control.Monad import Control.Category ((.)) import Data.Maybe import Data.Monoid import Data.Version import Data.Binary (Binary) import Data.Traversable import Distribution.Helper hiding (Programs(..)) import qualified Distribution.Helper as CH import qualified GhcMod.Types as T import GhcMod.Types import GhcMod.Monad.Types import GhcMod.Utils import GhcMod.PathsAndFiles import GhcMod.Logging import GhcMod.Output import GhcMod.CustomPackageDb import GhcMod.Stack import System.FilePath import System.Process import System.Exit import Prelude hiding ((.)) import Paths_ghc_mod as GhcMod -- | Only package related GHC options, sufficient for things that don't need to -- access home modules getGhcMergedPkgOptions :: (Applicative m, IOish m, Gm m) => m [GHCOption] getGhcMergedPkgOptions = chCached $ \distdir -> Cached { cacheLens = Just (lGmcMergedPkgOptions . lGmCaches), cacheFile = mergedPkgOptsCacheFile distdir, cachedAction = \_tcf (_progs, _projdir, _ver) _ma -> do opts <- runCHQuery ghcMergedPkgOptions return ([setupConfigPath distdir], opts) } getCabalPackageDbStack :: (IOish m, Gm m) => m [GhcPkgDb] getCabalPackageDbStack = chCached $ \distdir -> Cached { cacheLens = Just (lGmcPackageDbStack . lGmCaches), cacheFile = pkgDbStackCacheFile distdir, cachedAction = \_tcf (_progs, _projdir, _ver) _ma -> do crdl <- cradle dbs <- map chPkgToGhcPkg <$> runCHQuery packageDbStack return ([setupConfigFile crdl, sandboxConfigFile crdl], dbs) } chPkgToGhcPkg :: ChPkgDb -> GhcPkgDb chPkgToGhcPkg ChPkgGlobal = GlobalDb chPkgToGhcPkg ChPkgUser = UserDb chPkgToGhcPkg (ChPkgSpecific f) = PackageDb f -- | Primary interface to cabal-helper and intended single entrypoint to -- constructing 'GmComponent's -- -- The Component\'s 'gmcHomeModuleGraph' will be empty and has to be resolved by -- 'resolveGmComponents'. getComponents :: (Applicative m, IOish m, Gm m) => m [GmComponent 'GMCRaw ChEntrypoint] getComponents = chCached $ \distdir -> Cached { cacheLens = Just (lGmcComponents . lGmCaches), cacheFile = cabalHelperCacheFile distdir, cachedAction = \ _tcf (_progs, _projdir, _ver) _ma -> do runCHQuery $ do q <- join7 <$> ghcOptions <*> ghcPkgOptions <*> ghcSrcOptions <*> ghcLangOptions <*> entrypoints <*> entrypoints <*> sourceDirs let cs = flip map q $ curry8 (GmComponent mempty) return ([setupConfigPath distdir], cs) } where curry8 fn (a, (b, (c, (d, (e, (f, (g, h))))))) = fn a b c d e f g h join7 a b c d e f = join' a . join' b . join' c . join' d . join' e . join' f join' :: Eq a => [(a,b)] -> [(a,c)] -> [(a,(b,c))] join' lb lc = [ (a, (b, c)) | (a, b) <- lb , (a', c) <- lc , a == a' ] getQueryEnv :: (IOish m, GmOut m, GmEnv m) => m QueryEnv getQueryEnv = do crdl <- cradle progs <- patchStackPrograms crdl =<< (optPrograms <$> options) readProc <- gmReadProcess let projdir = cradleRootDir crdl distdir = projdir cradleDistDir crdl return (defaultQueryEnv projdir distdir) { qeReadProcess = readProc , qePrograms = helperProgs progs } runCHQuery :: (IOish m, GmOut m, GmEnv m) => Query m b -> m b runCHQuery a = do qe <- getQueryEnv runQuery qe a prepareCabalHelper :: (IOish m, GmEnv m, GmOut m, GmLog m) => m () prepareCabalHelper = do crdl <- cradle when (isCabalHelperProject $ cradleProject crdl) $ withCabal $ prepare' =<< getQueryEnv withAutogen :: (IOish m, GmEnv m, GmOut m, GmLog m) => m a -> m a withAutogen action = do gmLog GmDebug "" $ strDoc $ "making sure autogen files exist" crdl <- cradle let projdir = cradleRootDir crdl distdir = projdir cradleDistDir crdl (pkgName', _) <- runCHQuery packageId mCabalFile <- liftIO $ timeFile `traverse` cradleCabalFile crdl mCabalMacroHeader <- liftIO $ timeMaybe (distdir macrosHeaderPath) mCabalPathsModule <- liftIO $ timeMaybe (distdir autogenModulePath pkgName') when (mCabalMacroHeader < mCabalFile || mCabalPathsModule < mCabalFile) $ do gmLog GmDebug "" $ strDoc $ "autogen files out of sync" writeAutogen action where writeAutogen = do gmLog GmDebug "" $ strDoc $ "writing Cabal autogen files" writeAutogenFiles' =<< getQueryEnv withCabal :: (IOish m, GmEnv m, GmOut m, GmLog m) => m a -> m a withCabal action = do crdl <- cradle mCabalFile <- liftIO $ timeFile `traverse` cradleCabalFile crdl mCabalConfig <- liftIO $ timeMaybe (setupConfigFile crdl) mCabalSandboxConfig <- liftIO $ timeMaybe (sandboxConfigFile crdl) let haveSetupConfig = isJust mCabalConfig cusPkgDb <- getCustomPkgDbStack (flgs, pkgDbStackOutOfSync) <- do if haveSetupConfig then runCHQuery $ do flgs <- nonDefaultConfigFlags pkgDb <- map chPkgToGhcPkg <$> packageDbStack return (flgs, fromMaybe False $ (pkgDb /=) <$> cusPkgDb) else return ([], False) when (isSetupConfigOutOfDate mCabalFile mCabalConfig) $ gmLog GmDebug "" $ strDoc $ "setup configuration is out of date" when (isSetupConfigOutOfDate mCabalSandboxConfig mCabalConfig) $ gmLog GmDebug "" $ strDoc $ "sandbox configuration is out of date" when pkgDbStackOutOfSync $ gmLog GmDebug "" $ strDoc $ "package-db stack out of sync with ghc-mod.package-db-stack" when ( isSetupConfigOutOfDate mCabalFile mCabalConfig || pkgDbStackOutOfSync || isSetupConfigOutOfDate mCabalSandboxConfig mCabalConfig) $ do proj <- cradleProject <$> cradle opts <- options case proj of CabalProject -> do gmLog GmDebug "" $ strDoc "reconfiguring Cabal project" cabalReconfigure (optPrograms opts) crdl flgs StackProject {} -> do gmLog GmDebug "" $ strDoc "reconfiguring Stack project" -- TODO: we could support flags for stack too, but it seems -- you're supposed to put those in stack.yaml so detecting which -- flags to pass down would be more difficult -- "--flag PACKAGE:[-]FLAG Override flags set in stack.yaml -- (applies to local packages and extra-deps)" stackReconfigure (optStackBuildDeps opts) crdl (optPrograms opts) _ -> error $ "withCabal: unsupported project type: " ++ show proj action where cabalReconfigure progs crdl flgs = do readProc <- gmReadProcess withDirectory_ (cradleRootDir crdl) $ do cusPkgStack <- maybe [] ((PackageDb "clear"):) <$> getCustomPkgDbStack let progOpts = [ "--with-ghc=" ++ T.ghcProgram progs ] -- Only pass ghc-pkg if it was actually set otherwise we -- might break cabal's guessing logic ++ if T.ghcPkgProgram progs /= T.ghcPkgProgram (optPrograms defaultOptions) then [ "--with-ghc-pkg=" ++ T.ghcPkgProgram progs ] else [] ++ map pkgDbArg cusPkgStack ++ flagOpt toFlag (f, True) = f toFlag (f, False) = '-':f flagOpt = ["--flags", unwords $ map toFlag flgs] liftIO $ void $ readProc (T.cabalProgram progs) ("configure":progOpts) "" stackReconfigure deps crdl progs = do withDirectory_ (cradleRootDir crdl) $ do supported <- haveStackSupport if supported then do when deps $ spawn [T.stackProgram progs, "build", "--only-dependencies", "."] spawn [T.stackProgram progs, "build", "--only-configure", "."] else gmLog GmWarning "" $ strDoc $ "Stack project configuration is out of date, please reconfigure manually using 'stack build' as your stack version is too old (need at least 0.1.4.0)" spawn [] = return () spawn (exe:args) = do readProc <- gmReadProcess liftIO $ void $ readProc exe args "" haveStackSupport = do (rv, _, _) <- liftIO $ readProcessWithExitCode "stack" ["--numeric-version"] "" case rv of ExitSuccess -> return True ExitFailure _ -> return False pkgDbArg :: GhcPkgDb -> String pkgDbArg GlobalDb = "--package-db=global" pkgDbArg UserDb = "--package-db=user" pkgDbArg (PackageDb p) = "--package-db=" ++ p -- * Neither file exists -> should return False: -- @Nothing < Nothing = False@ -- (since we don't need to @cabal configure@ when no cabal file exists.) -- -- * Cabal file doesn't exist (impossible since cabal-helper is only used with -- cabal projects) -> should return False -- @Just cc < Nothing = False@ -- -- * dist/setup-config doesn't exist yet -> should return True: -- @Nothing < Just cf = True@ -- -- * Both files exist -- @Just cc < Just cf = cc < cf = cc `olderThan` cf@ isSetupConfigOutOfDate :: Maybe TimedFile -> Maybe TimedFile -> Bool isSetupConfigOutOfDate worldCabalFile worldCabalConfig = do worldCabalConfig < worldCabalFile helperProgs :: Programs -> CH.Programs helperProgs progs = CH.Programs { cabalProgram = T.cabalProgram progs, ghcProgram = T.ghcProgram progs, ghcPkgProgram = T.ghcPkgProgram progs } chCached :: (Applicative m, IOish m, Gm m, Binary a) => (FilePath -> Cached m GhcModState ChCacheData a) -> m a chCached c = do projdir <- cradleRootDir <$> cradle distdir <- (projdir ) . cradleDistDir <$> cradle d <- cacheInputData projdir withCabal $ cached projdir (c distdir) d where -- we don't need to include the distdir in the cache input because when it -- changes the cache files will be gone anyways ;) cacheInputData projdir = do opts <- options crdl <- cradle progs' <- patchStackPrograms crdl (optPrograms opts) return $ ( helperProgs progs' , projdir , (showVersion gmVer, chVer) ) gmVer = GhcMod.version chVer = VERSION_cabal_helper