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Diffstat (limited to 'vendor/cabal-helper-0.8.1.2/src/CabalHelper/Compiletime/Compile.hs')
| -rw-r--r-- | vendor/cabal-helper-0.8.1.2/src/CabalHelper/Compiletime/Compile.hs | 736 |
1 files changed, 0 insertions, 736 deletions
diff --git a/vendor/cabal-helper-0.8.1.2/src/CabalHelper/Compiletime/Compile.hs b/vendor/cabal-helper-0.8.1.2/src/CabalHelper/Compiletime/Compile.hs deleted file mode 100644 index 8da426f..0000000 --- a/vendor/cabal-helper-0.8.1.2/src/CabalHelper/Compiletime/Compile.hs +++ /dev/null @@ -1,736 +0,0 @@ --- cabal-helper: Simple interface to Cabal's configuration state --- Copyright (C) 2015-2018 Daniel Gröber <cabal-helper@dxld.at> --- --- 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 <http://www.gnu.org/licenses/>. -{-# LANGUAGE RecordWildCards, FlexibleContexts, NamedFieldPuns, DeriveFunctor, -GADTs #-} - -{-| -Module : CabalHelper.Compiletime.Compile -Description : Runtime compilation machinery -License : GPL-3 --} - -module CabalHelper.Compiletime.Compile where - -import Cabal.Plan -import Control.Applicative -import Control.Arrow -import Control.Exception as E -import Control.Monad -import Control.Monad.Trans.Maybe -import Control.Monad.IO.Class -import Data.Char -import Data.List -import Data.Maybe -import Data.String -import Data.Version -import GHC.IO.Exception (IOErrorType(OtherError)) -import Text.Printf -import Text.Read -import System.Directory -import System.FilePath -import System.Process -import System.Exit -import System.Environment -import System.IO -import System.IO.Error -import System.IO.Temp -import Prelude - - -import qualified Data.Text as Text -import qualified Data.Map.Strict as Map - -import Distribution.System (buildPlatform) -import Distribution.Text (display) - -import Paths_cabal_helper (version) -import CabalHelper.Compiletime.Data -import CabalHelper.Compiletime.Log -import CabalHelper.Compiletime.Types -import CabalHelper.Shared.Common -import CabalHelper.Shared.Sandbox (getSandboxPkgDb) - -data Compile - = CompileWithCabalSource - { compCabalSourceDir :: CabalSourceDir - , compCabalSourceVersion :: Version - } - | CompileWithCabalPackage - { compPackageDb :: Maybe PackageDbDir - , compCabalVersion :: CabalVersion - , compPackageDeps :: [String] - , compProductTarget :: CompilationProductScope - } - -data CompPaths = CompPaths - { compSrcDir :: FilePath - , compOutDir :: FilePath - , compExePath :: FilePath - } - --- | The Helper executable we produce as a compilation product can either be --- placed in a per-project location, or a per-user/global location in the user's --- home directory. This type controls where the compilation process places the --- executable. -data CompilationProductScope = CPSGlobal | CPSProject - -compileHelper :: Options -> Version -> FilePath -> Maybe (PlanJson, FilePath) -> FilePath -> IO (Either ExitCode FilePath) -compileHelper opts hdrCabalVersion projdir mnewstyle distdir = do - ghcVer <- ghcVersion opts - Just (prepare, comp) <- runMaybeT $ msum $ - case oCabalPkgDb opts of - Nothing -> - [ compileCabalSource - , compileNewBuild ghcVer - , compileSandbox ghcVer - , compileGlobal - , MaybeT $ Just <$> compileWithCabalInPrivatePkgDb - ] - Just db -> - [ return $ (return (), compileWithPkg (Just db) hdrCabalVersion CPSProject) - ] - - appdir <- appCacheDir - - let cp@CompPaths {compExePath} = compPaths appdir distdir comp - exists <- doesFileExist compExePath - if exists - then do - vLog opts $ "helper already compiled, using exe: "++compExePath - return (Right compExePath) - else do - vLog opts $ "helper exe does not exist, compiling "++compExePath - prepare >> compile comp cp opts - - where - logMsg = "using helper compiled with Cabal from " - --- for relaxed deps: find (sameMajorVersionAs hdrCabalVersion) . reverse . sort - - -- | Check if this version is globally available - compileGlobal :: MaybeT IO (IO (), Compile) - compileGlobal = do - cabal_versions <- listCabalVersions opts - ver <- MaybeT $ return $ find (== hdrCabalVersion) cabal_versions - vLog opts $ logMsg ++ "user/global package-db" - return $ (return (), compileWithPkg Nothing ver CPSGlobal) - - -- | Check if this version is available in the project sandbox - compileSandbox :: Version -> MaybeT IO (IO (), Compile) - compileSandbox ghcVer = do - let mdb_path = getSandboxPkgDb projdir (display buildPlatform) ghcVer - sandbox <- PackageDbDir <$> MaybeT mdb_path - cabal_versions <- listCabalVersions' opts (Just sandbox) - ver <- MaybeT $ return $ find (== hdrCabalVersion) cabal_versions - vLog opts $ logMsg ++ "sandbox package-db" - return $ (return (), compileWithPkg (Just sandbox) ver CPSProject) - - compileNewBuild :: Version -> MaybeT IO (IO (), Compile) - compileNewBuild ghcVer = do - (PlanJson {pjUnits}, distdir_newstyle) <- maybe mzero pure mnewstyle - let cabal_pkgid = - PkgId (PkgName (Text.pack "Cabal")) - (Ver $ versionBranch hdrCabalVersion) - mcabal_unit = listToMaybe $ - Map.elems $ Map.filter (\Unit {..} -> uPId == cabal_pkgid) pjUnits - Unit {} <- maybe mzero pure mcabal_unit - let inplace_db_path = distdir_newstyle - </> "packagedb" </> ("ghc-" ++ showVersion ghcVer) - inplace_db = PackageDbDir inplace_db_path - cabal_versions <- listCabalVersions' opts (Just inplace_db) - ver <- MaybeT $ return $ find (== hdrCabalVersion) cabal_versions - vLog opts $ logMsg ++ "v2-build package-db " ++ inplace_db_path - return $ (return (), compileWithPkg (Just inplace_db) ver CPSProject) - - -- | Compile the requested Cabal version into an isolated package-db if it's - -- not there already - compileWithCabalInPrivatePkgDb :: IO (IO (), Compile) - compileWithCabalInPrivatePkgDb = do - db@(PackageDbDir db_path) - <- getPrivateCabalPkgDb opts (CabalVersion hdrCabalVersion) - vLog opts $ logMsg ++ "private package-db in " ++ db_path - return (prepare db, compileWithPkg (Just db) hdrCabalVersion CPSGlobal) - where - prepare db = do - db_exists <- liftIO $ cabalVersionExistsInPkgDb opts hdrCabalVersion db - when (not db_exists) $ - void $ installCabal opts (Right hdrCabalVersion) `E.catch` - \(SomeException _) -> errorInstallCabal hdrCabalVersion distdir - - -- | See if we're in a cabal source tree - compileCabalSource :: MaybeT IO (IO (), Compile) - compileCabalSource = do - let cabalFile = projdir </> "Cabal.cabal" - cabalSrc <- liftIO $ doesFileExist cabalFile - let projdir' = CabalSourceDir projdir - case cabalSrc of - False -> mzero - True -> do - vLog opts $ "projdir looks like Cabal source tree (Cabal.cabal exists)" - cf <- liftIO $ readFile cabalFile - let buildType = cabalFileBuildType cf - ver = cabalFileVersion cf - - case buildType of - "simple" -> do - vLog opts $ "Cabal source tree is build-type:simple, moving on" - mzero - "custom" -> do - vLog opts $ "compiling helper with local Cabal source tree" - return $ (return (), compileWithCabalSource projdir' ver) - _ -> error $ "compileCabalSource: unknown build-type: '"++buildType++"'" - - compileWithCabalSource srcDir ver = - CompileWithCabalSource - { compCabalSourceDir = srcDir - , compCabalSourceVersion = ver - } - - compileWithPkg mdb ver target = - CompileWithCabalPackage - { compPackageDb = mdb - , compCabalVersion = CabalVersion ver - , compPackageDeps = [cabalPkgId ver] - , compProductTarget = target - } - - cabalPkgId v = "Cabal-" ++ showVersion v - -compile :: Compile -> CompPaths -> Options -> IO (Either ExitCode FilePath) -compile comp paths@CompPaths {..} opts@Options {..} = do - createDirectoryIfMissing True compOutDir - createHelperSources compSrcDir - - vLog opts $ "compSrcDir: " ++ compSrcDir - vLog opts $ "compOutDir: " ++ compOutDir - vLog opts $ "compExePath: " ++ compExePath - - invokeGhc opts $ compGhcInvocation comp paths - -compPaths :: FilePath -> FilePath -> Compile -> CompPaths -compPaths appdir distdir c = - case c of - CompileWithCabalPackage {compProductTarget=CPSGlobal,..} -> CompPaths {..} - where - compSrcDir = appdir </> exeName compCabalVersion <.> "build" - compOutDir = compSrcDir - compExePath = appdir </> exeName compCabalVersion - - CompileWithCabalPackage {compProductTarget=CPSProject,..} -> distdirPaths - CompileWithCabalSource {..} -> distdirPaths - where - distdirPaths = CompPaths {..} - where - compSrcDir = distdir </> "cabal-helper" - compOutDir = compSrcDir - compExePath = compOutDir </> "cabal-helper" - -data GhcInvocation = GhcInvocation - { giOutDir :: FilePath - , giOutput :: FilePath - , giCPPOptions :: [String] - , giPackageDBs :: [PackageDbDir] - , giIncludeDirs :: [FilePath] - , giHideAllPackages :: Bool - , giPackages :: [String] - , giWarningFlags :: [String] - , giInputs :: [String] - } - -compGhcInvocation :: Compile -> CompPaths -> GhcInvocation -compGhcInvocation comp CompPaths {..} = - case comp of - CompileWithCabalSource {..} -> - GhcInvocation - { giIncludeDirs = [compSrcDir, unCabalSourceDir compCabalSourceDir] - , giPackageDBs = [] - , giHideAllPackages = False - , giPackages = [] - , giCPPOptions = cppOptions compCabalSourceVersion - ++ [cabalVersionMacro compCabalSourceVersion] - , .. - } - CompileWithCabalPackage {..} -> - GhcInvocation - { giIncludeDirs = [compSrcDir] - , giPackageDBs = maybeToList compPackageDb - , giHideAllPackages = True - , giPackages = - [ "base" - , "containers" - , "directory" - , "filepath" - , "process" - , "bytestring" - , "ghc-prim" - ] ++ compPackageDeps - , giCPPOptions = cppOptions (unCabalVersion compCabalVersion) - , .. - } - where - - unCabalVersion (CabalVersion ver) = ver - unCabalVersion (CabalHEAD _) = Version [10000000, 0, 0] [] - - cppOptions cabalVer = - [ "-DCABAL_HELPER=1" - , cabalMinVersionMacro cabalVer - ] - - giOutDir = compOutDir - giOutput = compExePath - giWarningFlags = [ "-w" ] -- no point in bothering end users with warnings - giInputs = [compSrcDir</>"CabalHelper"</>"Runtime"</>"Main.hs"] - -cabalVersionMacro :: Version -> String -cabalVersionMacro (Version vs _) = - "-DCABAL_VERSION="++intercalate "," (map show vs) - -cabalMinVersionMacro :: Version -> String -cabalMinVersionMacro (Version (mj1:mj2:mi:_) _) = - "-DCH_MIN_VERSION_Cabal(major1,major2,minor)=\ - \( (major1) < "++show mj1++" \ - \|| (major1) == "++show mj1++" && (major2) < "++show mj2++" \ - \|| (major1) == "++show mj1++" && (major2) == "++show mj2++" && (minor) <= "++show mi++ - ")" -cabalMinVersionMacro _ = - error "cabalMinVersionMacro: Version must have at least 3 components" - -invokeGhc :: Options -> GhcInvocation -> IO (Either ExitCode FilePath) -invokeGhc opts@Options {..} GhcInvocation {..} = do - rv <- callProcessStderr' opts Nothing oGhcProgram $ concat - [ [ "-outputdir", giOutDir - , "-o", giOutput - ] - , map ("-optP"++) giCPPOptions - , map ("-package-conf="++) $ unPackageDbDir <$> giPackageDBs - , map ("-i"++) $ nub $ "" : giIncludeDirs - , if giHideAllPackages then ["-hide-all-packages"] else [] - , concatMap (\p -> ["-package", p]) giPackages - , giWarningFlags - , ["--make"] - , giInputs - ] - return $ - case rv of - ExitSuccess -> Right giOutput - e@(ExitFailure _) -> Left e - - --- | Cabal library version we're compiling the helper exe against. -data CabalVersion - = CabalHEAD { cvCommitId :: CommitId } - | CabalVersion { cabalVersion :: Version } - -newtype CommitId = CommitId { unCommitId :: String } - -exeName :: CabalVersion -> String -exeName (CabalHEAD commitid) = intercalate "-" - [ "cabal-helper" ++ showVersion version - , "CabalHEAD" ++ unCommitId commitid - ] -exeName CabalVersion {cabalVersion} = intercalate "-" - [ "cabal-helper" ++ showVersion version - , "Cabal" ++ showVersion cabalVersion - ] - -readProcess' :: Options -> FilePath -> [String] -> String -> IO String -readProcess' opts@Options{..} exe args inp = do - vLog opts $ intercalate " " $ map formatProcessArg (oGhcPkgProgram:args) - outp <- readProcess exe args inp - vLog opts $ unlines $ map ("=> "++) $ lines outp - return outp - -callProcessStderr' - :: Options -> Maybe FilePath -> FilePath -> [String] -> IO ExitCode -callProcessStderr' opts mwd exe args = do - let cd = case mwd of - Nothing -> []; Just wd -> [ "cd", formatProcessArg wd++";" ] - vLog opts $ intercalate " " $ cd ++ map formatProcessArg (exe:args) - (_, _, _, h) <- createProcess (proc exe args) { std_out = UseHandle stderr - , cwd = mwd } - waitForProcess h - -callProcessStderr :: Options -> Maybe FilePath -> FilePath -> [String] -> IO () -callProcessStderr opts mwd exe args = do - rv <- callProcessStderr' opts mwd exe args - case rv of - ExitSuccess -> return () - ExitFailure v -> processFailedException "callProcessStderr" exe args v - -processFailedException :: String -> String -> [String] -> Int -> IO a -processFailedException fn exe args rv = - ioError $ mkIOError OtherError msg Nothing Nothing - where - msg = concat [ fn, ": ", exe, " " - , intercalate " " (map formatProcessArg args) - , " (exit " ++ show rv ++ ")" - ] - -formatProcessArg :: String -> String -formatProcessArg xs - | any isSpace xs = "'"++ xs ++"'" - | otherwise = xs - -data HEAD = HEAD deriving (Eq, Show) - -installCabal :: Options -> Either HEAD Version -> IO (PackageDbDir, CabalVersion) -installCabal opts ever = do - appdir <- appCacheDir - let message ver = do - let sver = showVersion ver - hPutStr stderr $ printf "\ -\cabal-helper-wrapper: Installing a private copy of Cabal because we couldn't\n\ -\find the right version in your global/user package-db, this might take a\n\ -\while but will only happen once per Cabal version you're using.\n\ -\\n\ -\If anything goes horribly wrong just delete this directory and try again:\n\ -\ %s\n\ -\\n\ -\If you want to avoid this automatic installation altogether install\n\ -\version %s of Cabal manually (into your user or global package-db):\n\ -\ $ cabal install Cabal --constraint \"Cabal == %s\"\n\ -\\n\ -\Installing Cabal %s ...\n" appdir sver sver sver - - withSystemTempDirectory "cabal-helper-Cabal-source" $ \tmpdir -> do - (srcdir, cabalVer) <- case ever of - Left HEAD -> do - second CabalHEAD <$> unpackCabalHEAD opts tmpdir - Right ver -> do - message ver - let patch = fromMaybe nopCabalPatchDescription $ - find ((ver`elem`) . cpdVersions) patchyCabalVersions - (,) <$> unpackPatchedCabal opts ver tmpdir patch <*> pure (CabalVersion ver) - - db <- createPkgDb opts cabalVer - - runCabalInstall opts db srcdir ever - - return (db, cabalVer) - -{- -TODO: If the Cabal version we want to install is less than or equal to one we -have available, either through act-as-setup or in a package-db we should be able -to use act-as-setup or build a default Setup.hs exe and patch the Cabal source -to say build-type:simple. This will sidestep bugs in c-i>=1.24 - -See conversation in -https://github.com/haskell/cabal/commit/e2bf243300957321497353a2f85517e464f764ab - -Otherwise we might be able to use the shipped Setup.hs - --} - -runCabalInstall - :: Options -> PackageDbDir -> CabalSourceDir -> Either HEAD Version-> IO () -runCabalInstall opts (PackageDbDir db) (CabalSourceDir srcdir) ever = do - civ@CabalInstallVersion {..} <- cabalInstallVersion opts - cabal_opts <- return $ concat - [ - [ "--package-db=clear" - , "--package-db=global" - , "--package-db=" ++ db - , "--prefix=" ++ db </> "prefix" - ] - , withGHCProgramOptions opts - , if cabalInstallVer >= Version [1,20,0,0] [] - then ["--no-require-sandbox"] - else [] - , [ "install", srcdir ] - , if oVerbose opts - then ["-v"] - else [] - , [ "--only-dependencies" ] - ] - - callProcessStderr opts (Just "/") (oCabalProgram opts) cabal_opts - - runSetupHs opts db srcdir ever civ - - hPutStrLn stderr "done" - -withGHCProgramOptions :: Options -> [String] -withGHCProgramOptions opts = - concat [ [ "--with-ghc=" ++ oGhcProgram opts ] - , if oGhcPkgProgram opts /= oGhcPkgProgram defaultOptions - then [ "--with-ghc-pkg=" ++ oGhcPkgProgram opts ] - else [] - ] - -runSetupHs - :: Options - -> FilePath - -> FilePath - -> Either HEAD Version - -> CabalInstallVersion - -> IO () -runSetupHs opts@Options {..} db srcdir ever CabalInstallVersion {..} - | cabalInstallVer >= parseVer "1.24" = do - go $ \args -> callProcessStderr opts (Just srcdir) oCabalProgram $ - [ "act-as-setup", "--" ] ++ args - | otherwise = do - SetupProgram {..} <- compileSetupHs opts db srcdir - go $ callProcessStderr opts (Just srcdir) setupProgram - where - parmake_opt :: Maybe Int -> [String] - parmake_opt nproc' - | Left _ <- ever = ["-j"++nproc] - | Right ver <- ever, ver >= Version [1,20] [] = ["-j"++nproc] - | otherwise = [] - where - nproc = fromMaybe "" $ show <$> nproc' - - go :: ([String] -> IO ()) -> IO () - go run = do - run $ [ "configure", "--package-db", db, "--prefix", db </> "prefix" ] - ++ withGHCProgramOptions opts - mnproc <- join . fmap readMaybe <$> lookupEnv "NPROC" - run $ [ "build" ] ++ parmake_opt mnproc - run [ "copy" ] - run [ "register" ] - - - - -newtype SetupProgram = SetupProgram { setupProgram :: FilePath } -compileSetupHs :: Options -> FilePath -> FilePath -> IO SetupProgram -compileSetupHs opts db srcdir = do - ver <- ghcVersion opts - let no_version_macros - | ver >= Version [8] [] = [ "-fno-version-macros" ] - | otherwise = [] - - file = srcdir </> "Setup" - - callProcessStderr opts (Just srcdir) (oGhcProgram opts) $ concat - [ [ "--make" - , "-package-conf", db - ] - , no_version_macros - , [ file <.> "hs" - , "-o", file - ] - ] - return $ SetupProgram file - -data CabalPatchDescription = CabalPatchDescription { - cpdVersions :: [Version], - cpdUnpackVariant :: UnpackCabalVariant, - cpdPatchFn :: FilePath -> IO () - } -nopCabalPatchDescription :: CabalPatchDescription -nopCabalPatchDescription = CabalPatchDescription [] LatestRevision (const (return ())) - -patchyCabalVersions :: [CabalPatchDescription] -patchyCabalVersions = [ - let versions = [ Version [1,18,1] [] ] - variant = Pristine - patch = fixArrayConstraint - in CabalPatchDescription versions variant patch, - - let versions = [ Version [1,18,0] [] ] - variant = Pristine - patch dir = do - fixArrayConstraint dir - fixOrphanInstance dir - in CabalPatchDescription versions variant patch, - - let versions = [ Version [1,24,1,0] [] ] - variant = Pristine - patch _ = return () - in CabalPatchDescription versions variant patch - ] - where - fixArrayConstraint dir = do - let cabalFile = dir </> "Cabal.cabal" - cabalFileTmp = cabalFile ++ ".tmp" - - cf <- readFile cabalFile - writeFile cabalFileTmp $ replace "&& < 0.5" "&& < 0.6" cf - renameFile cabalFileTmp cabalFile - - fixOrphanInstance dir = do - let versionFile = dir </> "Distribution/Version.hs" - versionFileTmp = versionFile ++ ".tmp" - - let languagePragma = - "{-# LANGUAGE DeriveDataTypeable, StandaloneDeriving #-}" - languagePragmaCPP = - "{-# LANGUAGE CPP, DeriveDataTypeable, StandaloneDeriving #-}" - - derivingDataVersion = - "deriving instance Data Version" - derivingDataVersionCPP = unlines [ - "#if __GLASGOW_HASKELL__ < 707", - derivingDataVersion, - "#endif" - ] - - vf <- readFile versionFile - writeFile versionFileTmp - $ replace derivingDataVersion derivingDataVersionCPP - $ replace languagePragma languagePragmaCPP vf - - renameFile versionFileTmp versionFile - -unpackPatchedCabal - :: Options - -> Version - -> FilePath - -> CabalPatchDescription - -> IO CabalSourceDir -unpackPatchedCabal opts cabalVer tmpdir (CabalPatchDescription _ variant patch) = do - res@(CabalSourceDir dir) <- unpackCabal opts cabalVer tmpdir variant - patch dir - return res - -data UnpackCabalVariant = Pristine | LatestRevision -newtype CabalSourceDir = CabalSourceDir { unCabalSourceDir :: FilePath } -unpackCabal - :: Options -> Version -> FilePath -> UnpackCabalVariant -> IO CabalSourceDir -unpackCabal opts cabalVer tmpdir variant = do - let cabal = "Cabal-" ++ showVersion cabalVer - dir = tmpdir </> cabal - variant_opts = case variant of Pristine -> [ "--pristine" ]; _ -> [] - args = [ "get", cabal ] ++ variant_opts - callProcessStderr opts (Just tmpdir) (oCabalProgram opts) args - return $ CabalSourceDir dir - -unpackCabalHEAD :: Options -> FilePath -> IO (CabalSourceDir, CommitId) -unpackCabalHEAD opts tmpdir = do - let dir = tmpdir </> "cabal-head.git" - url = "https://github.com/haskell/cabal.git" - ExitSuccess <- rawSystem "git" [ "clone", "--depth=1", url, dir] - commit <- - withDirectory_ dir $ trim <$> readProcess' opts "git" ["rev-parse", "HEAD"] "" - return (CabalSourceDir $ dir </> "Cabal", CommitId commit) - where - withDirectory_ :: FilePath -> IO a -> IO a - withDirectory_ dir action = - bracket - (liftIO getCurrentDirectory) - (liftIO . setCurrentDirectory) - (\_ -> liftIO (setCurrentDirectory dir) >> action) - -errorInstallCabal :: Version -> FilePath -> IO a -errorInstallCabal cabalVer _distdir = panicIO $ printf "\ -\Installing Cabal version %s failed.\n\ -\\n\ -\You have the following choices to fix this:\n\ -\\n\ -\- The easiest way to try and fix this is just reconfigure the project and try\n\ -\ again:\n\ -\ $ cabal clean && cabal configure\n\ -\\n\ -\- If that fails you can try to install the version of Cabal mentioned above\n\ -\ into your global/user package-db somehow, you'll probably have to fix\n\ -\ something otherwise it wouldn't have failed above:\n\ -\ $ cabal install Cabal --constraint 'Cabal == %s'\n\ -\\n\ -\- If you're using `Build-Type: Simple`:\n\ -\ - You can see if you can reinstall your cabal-install executable while\n\ -\ having it linked to a version of Cabal that's available in you\n\ -\ package-dbs or can be built automatically:\n\ -\ $ ghc-pkg list | grep Cabal # find an available Cabal version\n\ -\ Cabal-W.X.Y.Z\n\ -\ $ cabal install cabal-install --constraint 'Cabal == W.X.*'\n\ -\ Afterwards you'll have to reconfigure your project:\n\ -\ $ cabal clean && cabal configure\n\ -\\n\ -\- If you're using `Build-Type: Custom`:\n\ -\ - Have cabal-install rebuild your Setup.hs executable with a version of the\n\ -\ Cabal library that you have available in your global/user package-db:\n\ -\ $ cabal clean && cabal configure\n\ -\ You might also have to install some version of the Cabal to do this:\n\ -\ $ cabal install Cabal\n\ -\\n" sver sver - where - sver = showVersion cabalVer - -listCabalVersions :: Options -> MaybeT IO [Version] -listCabalVersions opts = listCabalVersions' opts Nothing - -listCabalVersions' :: Options -> Maybe PackageDbDir -> MaybeT IO [Version] -listCabalVersions' opts@Options {..} mdb = do - case mdb of - Nothing -> mzero - Just (PackageDbDir db_path) -> do - exists <- liftIO $ doesDirectoryExist db_path - case exists of - False -> mzero - True -> MaybeT $ logIOError opts "listCabalVersions'" $ Just <$> do - let mdbopt = ("--package-conf="++) <$> unPackageDbDir <$> mdb - args = ["list", "--simple-output", "Cabal"] ++ maybeToList mdbopt - - catMaybes . map (fmap snd . parsePkgId . fromString) . words - <$> readProcess' opts oGhcPkgProgram args "" - -cabalVersionExistsInPkgDb :: Options -> Version -> PackageDbDir -> IO Bool -cabalVersionExistsInPkgDb opts cabalVer db@(PackageDbDir db_path) = do - exists <- doesDirectoryExist db_path - case exists of - False -> return False - True -> fromMaybe False <$> runMaybeT (do - vers <- listCabalVersions' opts (Just db) - return $ cabalVer `elem` vers) - -ghcVersion :: Options -> IO Version -ghcVersion opts@Options {..} = do - parseVer . trim <$> readProcess' opts oGhcProgram ["--numeric-version"] "" - -ghcPkgVersion :: Options -> IO Version -ghcPkgVersion opts@Options {..} = do - parseVer . trim . dropWhile (not . isDigit) <$> readProcess' opts oGhcPkgProgram ["--version"] "" - -newtype CabalInstallVersion = CabalInstallVersion { cabalInstallVer :: Version } -cabalInstallVersion :: Options -> IO CabalInstallVersion -cabalInstallVersion opts@Options {..} = do - CabalInstallVersion . parseVer . trim - <$> readProcess' opts oCabalProgram ["--numeric-version"] "" - -createPkgDb :: Options -> CabalVersion -> IO PackageDbDir -createPkgDb opts@Options {..} cabalVer = do - db@(PackageDbDir db_path) <- getPrivateCabalPkgDb opts cabalVer - exists <- doesDirectoryExist db_path - when (not exists) $ callProcessStderr opts Nothing oGhcPkgProgram ["init", db_path] - return db - -getPrivateCabalPkgDb :: Options -> CabalVersion -> IO PackageDbDir -getPrivateCabalPkgDb opts cabalVer = do - appdir <- appCacheDir - ghcVer <- ghcVersion opts - let db_path = appdir </> exeName cabalVer - ++ "-ghc" ++ showVersion ghcVer - ++ ".package-db" - return $ PackageDbDir db_path - --- "Cabal" ++ ver ++ "-ghc" ++ showVersion ghcVer - --- | Find @version: XXX@ delcaration in a cabal file -cabalFileVersion :: String -> Version -cabalFileVersion = parseVer . cabalFileTopField "version" - --- | Find @build-type: XXX@ delcaration in a cabal file -cabalFileBuildType :: String -> String -cabalFileBuildType = cabalFileTopField "build-type" - -cabalFileTopField :: String -> String -> String -cabalFileTopField field cabalFile = value - where - Just value = extract <$> find ((field++":") `isPrefixOf`) ls - ls = map (map toLower) $ lines cabalFile - extract = dropWhile (/=':') >>> drop 1 >>> dropWhile isSpace >>> takeWhile (not . isSpace) |