-- cabal-helper: Simple interface to Cabal's configuration state -- Copyright (C) 2015-2018 Daniel Gröber -- -- This program is free software: you can redistribute it and/or modify -- it under the terms of the GNU 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 General Public License for more details. -- -- You should have received a copy of the GNU General Public License -- along with this program. If not, see . {-# LANGUAGE RecordWildCards, NamedFieldPuns, FlexibleContexts, ViewPatterns #-} module Main where import Cabal.Plan import Control.Applicative import Control.Monad import Data.Char import Data.List import Data.Maybe import Data.String import Text.Printf import Text.Show.Pretty import System.Console.GetOpt import System.Environment import System.Directory import System.FilePath import System.Process import System.Exit import System.IO import Prelude import qualified Data.Text as Text import qualified Data.Map.Strict as Map import Distribution.System (buildPlatform) import Distribution.Text (display) import Distribution.Verbosity (silent, deafening) import Distribution.Package (packageName, packageVersion) import Distribution.Simple.GHC as GHC (configure) import Paths_cabal_helper (version) import CabalHelper.Compiletime.Compat.ProgramDb ( defaultProgramDb, programPath, lookupProgram, ghcProgram, ghcPkgProgram) import CabalHelper.Compiletime.Compat.Version import CabalHelper.Compiletime.Compile import CabalHelper.Compiletime.Types import CabalHelper.Shared.Common import CabalHelper.Shared.InterfaceTypes usage :: IO () usage = do prog <- getProgName hPutStr stderr $ "Usage: " ++ prog ++ " " ++ usageMsg where usageMsg = "\ \( print-appcachedir\n\ \| print-build-platform\n\ \| [--verbose]\n\ \ [--with-ghc=GHC_PATH]\n\ \ [--with-ghc-pkg=GHC_PKG_PATH]\n\ \ [--with-cabal=CABAL_PATH]\n\ \ [--with-cabal-version=VERSION]\n\ \ [--with-cabal-pkg-db=PKG_DB]\n\ \ v1-style PROJ_DIR DIST_DIR \n\ \ ( print-exe | package-id | [CABAL_HELPER_ARGS...] )\n\ \ v2-style PROJ_DIR DIST_NEWSTYLE_DIR DIST_DIR\n\ \ ( print-exe | package-id | [CABAL_HELPER_ARGS...] )\n\ \)\n" globalArgSpec :: [OptDescr (Options -> Options)] globalArgSpec = [ option "h" ["help"] "Display help message" $ NoArg $ \o -> o { oHelp = True } , option "" ["verbose"] "Be more verbose" $ NoArg $ \o -> o { oVerbose = True } , option "" ["with-ghc"] "GHC executable to use" $ reqArg "PROG" $ \p o -> o { oGhcProgram = p } , option "" ["with-ghc-pkg"] "ghc-pkg executable to use (only needed when guessing from GHC path fails)" $ reqArg "PROG" $ \p o -> o { oGhcPkgProgram = p } , option "" ["with-cabal"] "cabal-install executable to use" $ reqArg "PROG" $ \p o -> o { oCabalProgram = p } , option "" ["with-cabal-version"] "Cabal library version to use" $ reqArg "VERSION" $ \p o -> o { oCabalVersion = Just $ parseVer p } , option "" ["with-cabal-pkg-db"] "package database to look for Cabal library in" $ reqArg "PKG_DB" $ \p o -> o { oCabalPkgDb = Just (PackageDbDir p) } ] where option :: [Char] -> [String] -> String -> ArgDescr a -> OptDescr a option s l udsc dsc = Option s l dsc udsc reqArg :: String -> (String -> a) -> ArgDescr a reqArg udsc dsc = ReqArg dsc udsc parseCommandArgs :: Options -> [String] -> (Options, [String]) parseCommandArgs opts argv = case getOpt RequireOrder globalArgSpec argv of (o,r,[]) -> (foldr id opts o, r) (_,_,errs) -> panic $ "Parsing command options failed:\n" ++ concat errs guessProgramPaths :: Options -> IO Options guessProgramPaths opts = do let v | oVerbose opts = deafening | otherwise = silent mGhcPath0 | same oGhcProgram opts dopts = Nothing | otherwise = Just $ oGhcProgram opts mGhcPkgPath0 | same oGhcPkgProgram opts dopts = Nothing | otherwise = Just $ oGhcPkgProgram opts (_compiler, _mplatform, progdb) <- GHC.configure v mGhcPath0 mGhcPkgPath0 defaultProgramDb let mghcPath1 = programPath <$> lookupProgram ghcProgram progdb mghcPkgPath1 = programPath <$> lookupProgram ghcPkgProgram progdb return $ opts { oGhcProgram = fromMaybe (oGhcProgram opts) mghcPath1 , oGhcPkgProgram = fromMaybe (oGhcProgram opts) mghcPkgPath1 } where same f o o' = f o == f o' dopts = defaultOptions overrideVerbosityEnvVar :: Options -> IO Options overrideVerbosityEnvVar opts = do x <- lookup "CABAL_HELPER_DEBUG" <$> getEnvironment return $ case x of Just _ -> opts { oVerbose = True } Nothing -> opts main :: IO () main = handlePanic $ do (opts', args) <- parseCommandArgs defaultOptions <$> getArgs opts <- overrideVerbosityEnvVar =<< guessProgramPaths opts' case args of _ | oHelp opts -> usage [] -> usage "help":[] -> usage "version":[] -> putStrLn $ showVersion version "print-appdatadir":[] -> putStrLn =<< appCacheDir "print-appcachedir":[] -> putStrLn =<< appCacheDir "print-build-platform":[] -> putStrLn $ display buildPlatform "oldstyle":projdir:_distdir:"package-id":[] -> do let v | oVerbose opts = deafening | otherwise = silent -- ghc-mod will catch multiple cabal files existing before we get here [cfile] <- filter isCabalFile <$> getDirectoryContents projdir gpd <- readPackageDescription v (projdir cfile) putStrLn $ show $ [Just $ ChResponseVersion (display (packageName gpd)) (toDataVersion $ packageVersion gpd)] "v2-style":projdir:distdir_newstyle:unitid':args' -> do let unitid = UnitId $ Text.pack unitid' let plan_path = distdir_newstyle "cache" "plan.json" plan@PlanJson {pjCabalLibVersion=Ver (makeDataVersion -> pjCabalLibVersion) } <- decodePlanJson plan_path case oCabalVersion opts of Just ver | pjCabalLibVersion /= ver -> let sver = showVersion ver spjVer = showVersion pjCabalLibVersion in panic $ printf "\ \Cabal version %s was requested but plan.json was written by version %s" sver spjVer _ -> case Map.lookup unitid $ pjUnits plan of Just u@Unit {uType} | uType /= UnitTypeLocal -> do panic $ "\ \UnitId '"++ unitid' ++"' points to non-local unit: " ++ ppShow u Just Unit {uDistDir=Nothing} -> panic $ printf "\ \plan.json doesn't contain 'dist-dir' for UnitId '"++ unitid' ++"'" Just Unit {uType=UnitTypeLocal, uDistDir=Just distdir} -> runHelper opts projdir (Just (plan, distdir_newstyle)) distdir pjCabalLibVersion args' _ -> let units = map (\(UnitId u) -> Text.unpack u) $ Map.keys $ Map.filter ((==UnitTypeLocal) . uType) $ pjUnits plan units_list = unlines $ map (" "++) units in panic $ "\ \UnitId '"++ unitid' ++"' not found in plan.json, available local units:\n" ++ units_list "v1-style":projdir:distdir:args' -> do cfgf <- canonicalizePath (distdir "setup-config") mhdr <- getCabalConfigHeader cfgf case (mhdr, oCabalVersion opts) of (Nothing, _) -> panic $ printf "\ \Could not read Cabal's persistent setup configuration header\n\ \- Check first line of: %s\n\ \- Maybe try: $ cabal configure" cfgf (Just (hdrCabalVersion, _), Just ver) | hdrCabalVersion /= ver -> panic $ printf "\ \Cabal version %s was requested but setup configuration was\n\ \written by version %s" (showVersion ver) (showVersion hdrCabalVersion) (Just (hdrCabalVersion, _), _) -> runHelper opts projdir Nothing distdir hdrCabalVersion args' _ -> do hPutStrLn stderr "Invalid command line!" usage exitWith $ ExitFailure 1 runHelper :: Options -> FilePath -> Maybe (PlanJson, FilePath) -> FilePath -> DataVersion -> [String] -> IO () runHelper opts projdir mnewstyle distdir cabal_ver args' = do eexe <- compileHelper opts cabal_ver projdir mnewstyle distdir case eexe of Left e -> exitWith e Right exe -> do case args' of "print-exe":_ -> putStrLn exe _ -> do (_,_,_,h) <- createProcess $ proc exe $ projdir : distdir : args' exitWith =<< waitForProcess h