From f38daf67730fe31b865528eb972c619857e62a5c Mon Sep 17 00:00:00 2001 From: alexwl Date: Mon, 8 Oct 2018 02:40:18 +0300 Subject: Update cabal-helper to version 0.8.1.2 that supports Cabal (>=1.14 && <1.26 || >=2.0 && <2.5) Building cabal-helper-0.8.1.2 with Stack failed with 'Dependency cycle detected' error. It seems to be https://github.com/commercialhaskell/stack/issues/4265 Stack bug. As a temporary solution I added source code of cabal-helper package to vendor directory and commented out 'build-tool-depends: cabal-helper:cabal-helper-wrapper' line in the cabal-helper.cabal file. --- .../src/CabalHelper/Shared/Sandbox.hs | 78 ++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 vendor/cabal-helper-0.8.1.2/src/CabalHelper/Shared/Sandbox.hs (limited to 'vendor/cabal-helper-0.8.1.2/src/CabalHelper/Shared/Sandbox.hs') diff --git a/vendor/cabal-helper-0.8.1.2/src/CabalHelper/Shared/Sandbox.hs b/vendor/cabal-helper-0.8.1.2/src/CabalHelper/Shared/Sandbox.hs new file mode 100644 index 0000000..2f3774f --- /dev/null +++ b/vendor/cabal-helper-0.8.1.2/src/CabalHelper/Shared/Sandbox.hs @@ -0,0 +1,78 @@ +-- cabal-helper: Simple interface to Cabal's configuration state +-- Copyright (C) 2015-2017 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 . + +{-| +Module : CabalHelper.Shared.Sandbox +Description : Extracting information from @cabal.sandbox.config@ files +License : GPL-3 +-} + +module CabalHelper.Shared.Sandbox where + +import Control.Applicative +import Data.Char +import Data.Maybe +import Data.List +import Data.Version +import System.FilePath +import System.Directory +import Prelude + +import qualified Data.Traversable as T + +-- | Get the path to the sandbox package-db in a project +getSandboxPkgDb :: FilePath + -- ^ Path to the cabal package root directory (containing the + -- @cabal.sandbox.config@ file) + -> String + -- ^ Cabal build platform, i.e. @buildPlatform@ + -> Version + -- ^ GHC version (@cProjectVersion@ is your friend) + -> IO (Maybe FilePath) +getSandboxPkgDb d platform ghcVer = do + mConf <- T.traverse readFile =<< mightExist (d "cabal.sandbox.config") + return $ fixPkgDbVer <$> (extractSandboxDbDir =<< mConf) + + where + fixPkgDbVer dir = + case takeFileName dir == ghcSandboxPkgDbDir platform ghcVer of + True -> dir + False -> takeDirectory dir ghcSandboxPkgDbDir platform ghcVer + +ghcSandboxPkgDbDir :: String -> Version -> String +ghcSandboxPkgDbDir platform ghcVer = + platform ++ "-ghc-" ++ showVersion ghcVer ++ "-packages.conf.d" + +-- | Extract the sandbox package db directory from the cabal.sandbox.config +-- file. Exception is thrown if the sandbox config file is broken. +extractSandboxDbDir :: String -> Maybe FilePath +extractSandboxDbDir conf = extractValue <$> parse conf + where + key = "package-db:" + keyLen = length key + + parse = listToMaybe . filter (key `isPrefixOf`) . lines + extractValue = CabalHelper.Shared.Sandbox.dropWhileEnd isSpace . dropWhile isSpace . drop keyLen + + +mightExist :: FilePath -> IO (Maybe FilePath) +mightExist f = do + exists <- doesFileExist f + return $ if exists then (Just f) else (Nothing) + +-- dropWhileEnd is not provided prior to base 4.5.0.0. +dropWhileEnd :: (a -> Bool) -> [a] -> [a] +dropWhileEnd p = foldr (\x xs -> if p x && null xs then [] else x : xs) [] -- cgit v1.2.3