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|
-- cabal-helper: Simple interface to Cabal's configuration state
-- Copyright (C) 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/>.
{-|
Module : CabalHelper.Compiletime.Program.Cabal
Description : cabal-install program interface
License : GPL-3
-}
module CabalHelper.Compiletime.Cabal where
import Control.Exception (bracket)
import Control.Monad.IO.Class
import Data.List
import Data.Maybe
import Data.Version
import System.Exit
import System.Directory
import System.FilePath
import CabalHelper.Compiletime.Types
import CabalHelper.Compiletime.Process
import CabalHelper.Shared.Common (trim, replace)
import Paths_cabal_helper (version)
-- | Cabal library version we're compiling the helper exe against.
data CabalVersion
= CabalHEAD { cvCommitId :: CommitId }
| CabalVersion { cabalVersion :: Version }
newtype CommitId = CommitId { unCommitId :: String }
showCabalVersion :: CabalVersion -> String
showCabalVersion (CabalHEAD commitid) =
"HEAD-" ++ unCommitId commitid
showCabalVersion CabalVersion {cabalVersion} =
showVersion cabalVersion
exeName :: CabalVersion -> String
exeName (CabalHEAD commitid) = intercalate "--"
[ "cabal-helper-" ++ showVersion version
, "Cabal-HEAD" ++ unCommitId commitid
]
exeName CabalVersion {cabalVersion} = intercalate "--"
[ "cabal-helper-" ++ showVersion version
, "Cabal-" ++ showVersion cabalVersion
]
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
:: Env
=> Version
-> FilePath
-> IO CabalSourceDir
unpackPatchedCabal cabalVer tmpdir = do
res@(CabalSourceDir dir) <- unpackCabal cabalVer tmpdir variant
patch dir
return res
where
CabalPatchDescription _ variant patch = fromMaybe nopCabalPatchDescription $
find ((cabalVer `elem`) . cpdVersions) patchyCabalVersions
data UnpackCabalVariant = Pristine | LatestRevision
newtype CabalSourceDir = CabalSourceDir { unCabalSourceDir :: FilePath }
unpackCabal
:: (Verbose, Progs)
=> Version
-> FilePath
-> UnpackCabalVariant
-> IO CabalSourceDir
unpackCabal 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 (Just tmpdir) (cabalProgram ?progs) args
return $ CabalSourceDir dir
unpackCabalHEAD :: Env => FilePath -> IO (CabalSourceDir, CommitId)
unpackCabalHEAD 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' "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)
findCabalFile :: FilePath -> IO FilePath
findCabalFile pkgdir = do
[cfile] <- filter isCabalFile <$> getDirectoryContents pkgdir
return cfile
where
isCabalFile :: FilePath -> Bool
isCabalFile f = takeExtension' f == ".cabal"
takeExtension' :: FilePath -> String
takeExtension' p =
if takeFileName p == takeExtension p
then "" -- just ".cabal" is not a valid cabal file
else takeExtension p
|
