packages feed

folds 0.7.1 → 0.7.2

raw patch · 6 files changed

+221/−131 lines, 6 filessetup-changednew-uploaderPVP: major bump suggested

API removals or changes: PVP suggests a major version bump

API changes (from Hackage documentation)

- Data.Fold.Internal: instance (Data.Data.Data a, Data.Data.Data b) => Data.Data.Data (Data.Fold.Internal.Pair' a b)
- Data.Fold.Internal: instance (Data.Data.Data a, Data.Data.Data s) => Data.Data.Data (Data.Fold.Internal.N a s)
- Data.Fold.Internal: instance (Data.Data.Data a, Data.Data.Data s) => Data.Data.Data (Data.Fold.Internal.S a s)
- Data.Fold.Internal: instance (GHC.Classes.Eq a, GHC.Classes.Eq b) => GHC.Classes.Eq (Data.Fold.Internal.Pair' a b)
- Data.Fold.Internal: instance (GHC.Classes.Ord a, GHC.Classes.Ord b) => GHC.Classes.Ord (Data.Fold.Internal.Pair' a b)
- Data.Fold.Internal: instance (GHC.Read.Read a, GHC.Read.Read b) => GHC.Read.Read (Data.Fold.Internal.Pair' a b)
- Data.Fold.Internal: instance (GHC.Show.Show a, GHC.Show.Show b) => GHC.Show.Show (Data.Fold.Internal.Pair' a b)
+ Data.Fold.Internal: instance (Data.Data.Data b, Data.Data.Data a) => Data.Data.Data (Data.Fold.Internal.Pair' a b)
+ Data.Fold.Internal: instance (Data.Data.Data s, Data.Data.Data a) => Data.Data.Data (Data.Fold.Internal.N a s)
+ Data.Fold.Internal: instance (Data.Data.Data s, Data.Data.Data a) => Data.Data.Data (Data.Fold.Internal.S a s)
+ Data.Fold.Internal: instance (GHC.Classes.Eq b, GHC.Classes.Eq a) => GHC.Classes.Eq (Data.Fold.Internal.Pair' a b)
+ Data.Fold.Internal: instance (GHC.Classes.Ord b, GHC.Classes.Ord a) => GHC.Classes.Ord (Data.Fold.Internal.Pair' a b)
+ Data.Fold.Internal: instance (GHC.Read.Read b, GHC.Read.Read a) => GHC.Read.Read (Data.Fold.Internal.Pair' a b)
+ Data.Fold.Internal: instance (GHC.Show.Show b, GHC.Show.Show a) => GHC.Show.Show (Data.Fold.Internal.Pair' a b)
- Data.Fold: asL1' :: AsL1' p => p a b -> L1' a b
+ Data.Fold: asL1' :: (AsL1' p, AsL' p) => p a b -> L1' a b
- Data.Fold: class AsRM1 p => AsL1' p
+ Data.Fold: class AsRM1 p => AsL1' p where asL1' = asL1' . asL'
- Data.Fold: class AsRM1 p => AsRM p
+ Data.Fold: class AsRM1 p => AsRM p where asM = asM . asR asR = asR . asM
- Data.Fold: class AsRM1 p
+ Data.Fold: class AsRM1 p where asM1 = asM1 . asR1 asR1 = asR1 . asM1
- Data.Fold: class Scan p => Folding p
+ Data.Fold: class Scan p => Folding p where prefix = prefixOf folded postfix = postfixOf folded run = runOf folded
- Data.Fold: class Choice p => Scan p
+ Data.Fold: class Choice p => Scan p where prefix1 = prefix . An postfix1 p = postfix p . An run1 = run . An
- Data.Fold: postfix1 :: Scan p => p a b -> a -> p a b
+ Data.Fold: postfix1 :: (Scan p, Folding p) => p a b -> a -> p a b
- Data.Fold: prefix1 :: Scan p => a -> p a b -> p a b
+ Data.Fold: prefix1 :: (Scan p, Folding p) => a -> p a b -> p a b
- Data.Fold: run1 :: Scan p => a -> p a b -> b
+ Data.Fold: run1 :: (Scan p, Folding p) => a -> p a b -> b
- Data.Fold.Class: class Scan p => Folding p
+ Data.Fold.Class: class Scan p => Folding p where prefix = prefixOf folded postfix = postfixOf folded run = runOf folded
- Data.Fold.Class: class Choice p => Scan p
+ Data.Fold.Class: class Choice p => Scan p where prefix1 = prefix . An postfix1 p = postfix p . An run1 = run . An
- Data.Fold.Class: postfix1 :: Scan p => p a b -> a -> p a b
+ Data.Fold.Class: postfix1 :: (Scan p, Folding p) => p a b -> a -> p a b
- Data.Fold.Class: prefix1 :: Scan p => a -> p a b -> p a b
+ Data.Fold.Class: prefix1 :: (Scan p, Folding p) => a -> p a b -> p a b
- Data.Fold.Class: run1 :: Scan p => a -> p a b -> b
+ Data.Fold.Class: run1 :: (Scan p, Folding p) => a -> p a b -> b
- Data.Fold.Internal: foldDeRef :: (MuRef1 f, Bifoldable (DeRef1 f)) => f a -> FreeMonoid a
+ Data.Fold.Internal: foldDeRef :: forall f a. (MuRef1 f, Bifoldable (DeRef1 f)) => f a -> FreeMonoid a
- Data.Fold.Internal: foldDeRef1 :: (MuRef1 f, Bifoldable1 (DeRef1 f)) => f a -> FreeSemigroup a
+ Data.Fold.Internal: foldDeRef1 :: forall f a. (MuRef1 f, Bifoldable1 (DeRef1 f)) => f a -> FreeSemigroup a

Files

.travis.yml view
@@ -14,25 +14,25 @@  matrix:   include:-    - env: CABALVER=1.16 GHCVER=7.6.3 BUILD=cabal+    - env: CABALVER=1.24 GHCVER=7.6.3 BUILD=cabal       compiler: ": #GHC 7.6.3"-      addons: {apt: {packages: [cabal-install-1.16,ghc-7.6.3,alex-3.1.4,happy-1.19.5], sources: [hvr-ghc]}}+      addons: {apt: {packages: [cabal-install-1.24,ghc-7.6.3,alex-3.1.4,happy-1.19.5], sources: [hvr-ghc]}} -    - env: CABALVER=1.18 GHCVER=7.8.4 BUILD=cabal+    - env: CABALVER=1.24 GHCVER=7.8.4 BUILD=cabal       compiler: ": #GHC 7.8.4"-      addons: {apt: {packages: [cabal-install-1.18,ghc-7.8.4,alex-3.1.4,happy-1.19.5], sources: [hvr-ghc]}}+      addons: {apt: {packages: [cabal-install-1.24,ghc-7.8.4,alex-3.1.4,happy-1.19.5], sources: [hvr-ghc]}} -    - env: CABALVER=1.22 GHCVER=7.10.1 BUILD=cabal-      compiler: ": #GHC 7.10.1"-      addons: {apt: {packages: [cabal-install-1.22,ghc-7.10.1,alex-3.1.4,happy-1.19.5], sources: [hvr-ghc]}}+    - env: CABALVER=1.24 GHCVER=7.10.3 BUILD=cabal+      compiler: ": #GHC 7.10.3"+      addons: {apt: {packages: [cabal-install-1.24,ghc-7.10.3,alex-3.1.4,happy-1.19.5], sources: [hvr-ghc]}} -    - env: CABALVER=1.22 GHCVER=7.10.2 BUILD=cabal-      compiler: ": #GHC 7.10.2"-      addons: {apt: {packages: [cabal-install-1.22,ghc-7.10.2,alex-3.1.4,happy-1.19.5], sources: [hvr-ghc]}}+    - env: CABALVER=1.24 GHCVER=8.0.2 BUILD=cabal+      compiler: ": #GHC 8.0.2"+      addons: {apt: {packages: [cabal-install-1.24,ghc-8.0.2,alex-3.1.4,happy-1.19.5], sources: [hvr-ghc]}} -    - env: CABALVER=1.24 GHCVER=8.0.1 BUILD=cabal-      compiler: ": #GHC 8.0.1"-      addons: {apt: {packages: [cabal-install-1.24,ghc-8.0.1,alex-3.1.4,happy-1.19.5], sources: [hvr-ghc]}}+    - env: CABALVER=1.24 GHCVER=8.2.1 BUILD=cabal+      compiler: ": #GHC 8.2.1"+      addons: {apt: {packages: [cabal-install-1.24,ghc-8.2.1,alex-3.1.4,happy-1.19.5], sources: [hvr-ghc]}}      - env: BUILD=stack STACK_YAML=stack-7.10.yaml STACK_OPTIONS=--skip-ghc-check       addons: {apt: {packages: [cabal-install-1.22,ghc-7.10.2,alex-3.1.4,happy-1.19.5], sources: [hvr-ghc]}}@@ -52,8 +52,8 @@        chmod a+x ~/bin/stack;        scripts/travis_long stack --no-terminal setup;;      cabal)-       export HAPPYVER=1.19.5-       export ALEXVER=3.1.4+       export HAPPYVER=1.19.5;+       export ALEXVER=3.1.4;        export PATH=~/.cabal/bin:/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:/opt/happy/$HAPPYVER/bin:/opt/alex/$ALEXVER/bin:$PATH;;    esac install:@@ -80,8 +80,7 @@          echo "cabal build-cache MISS";          rm -rf $HOME/.cabsnap;          mkdir -p $HOME/.ghc $HOME/.cabal/lib $HOME/.cabal/share $HOME/.cabal/bin;-         cabal install --only-dependencies --enable-tests --enable-benchmarks;-         if [ "$GHCVER" = "7.10.1" ]; then cabal install Cabal-1.22.4.0; fi;+         cabal install -j --only-dependencies --enable-tests --enable-benchmarks;        fi;        if [ ! -d $HOME/.cabsnap ]; then          echo "snapshotting package-db to build-cache";
CHANGELOG.markdown view
@@ -1,3 +1,9 @@+0.7.2+-----+* Revamp `Setup.hs` to use `cabal-doctest`. This makes it build+  with `Cabal-2.0`, and makes the `doctest`s work with `cabal new-build` and+  sandboxes.+ 0.7.1 ----- * Support `pointed` 5
Setup.lhs view
@@ -1,55 +1,182 @@-#!/usr/bin/runhaskell \begin{code}-{-# OPTIONS_GHC -Wall #-}+{-# LANGUAGE CPP #-}+{-# LANGUAGE OverloadedStrings #-} module Main (main) where +#ifndef MIN_VERSION_cabal_doctest+#define MIN_VERSION_cabal_doctest(x,y,z) 0+#endif+++#if MIN_VERSION_cabal_doctest(1,0,0)+import Distribution.Extra.Doctest ( defaultMainWithDoctests )+#else++-- Otherwise we provide a shim++#ifndef MIN_VERSION_Cabal+#define MIN_VERSION_Cabal(x,y,z) 0+#endif+#ifndef MIN_VERSION_directory+#define MIN_VERSION_directory(x,y,z) 0+#endif+#if MIN_VERSION_Cabal(1,24,0)+#define InstalledPackageId UnitId+#endif++import Control.Monad ( when ) import Data.List ( nub )-import Data.Version ( showVersion )-import Distribution.Package ( PackageName(PackageName), Package, PackageId, InstalledPackageId, packageVersion, packageName )-import Distribution.PackageDescription ( PackageDescription(), TestSuite(..) )+import Data.String ( fromString )+import Distribution.Package ( InstalledPackageId )+import Distribution.Package ( PackageId, Package (..), packageVersion )+import Distribution.PackageDescription ( PackageDescription(), TestSuite(..) , Library (..), BuildInfo (..)) import Distribution.Simple ( defaultMainWithHooks, UserHooks(..), simpleUserHooks )-import Distribution.Simple.Utils ( rewriteFile, createDirectoryIfMissingVerbose, copyFiles )+import Distribution.Simple.Utils ( rewriteFile, createDirectoryIfMissingVerbose ) import Distribution.Simple.BuildPaths ( autogenModulesDir )-import Distribution.Simple.Setup ( BuildFlags(buildVerbosity), Flag(..), fromFlag, HaddockFlags(haddockDistPref))-import Distribution.Simple.LocalBuildInfo ( withLibLBI, withTestLBI, LocalBuildInfo(), ComponentLocalBuildInfo(componentPackageDeps) )-import Distribution.Text ( display )-import Distribution.Verbosity ( Verbosity, normal )+import Distribution.Simple.Setup ( BuildFlags(buildDistPref, buildVerbosity), fromFlag)+import Distribution.Simple.LocalBuildInfo ( withPackageDB, withLibLBI, withTestLBI, LocalBuildInfo(), ComponentLocalBuildInfo(componentPackageDeps), compiler )+import Distribution.Simple.Compiler ( showCompilerId , PackageDB (..))+import Distribution.Text ( display , simpleParse ) import System.FilePath ( (</>) ) -main :: IO ()-main = defaultMainWithHooks simpleUserHooks-  { buildHook = \pkg lbi hooks flags -> do-     generateBuildModule (fromFlag (buildVerbosity flags)) pkg lbi-     buildHook simpleUserHooks pkg lbi hooks flags-  , postHaddock = \args flags pkg lbi -> do-     copyFiles normal (haddockOutputDir flags pkg) []-     postHaddock simpleUserHooks args flags pkg lbi-  }+#if MIN_VERSION_Cabal(1,25,0)+import Distribution.Simple.BuildPaths ( autogenComponentModulesDir )+#endif -haddockOutputDir :: Package p => HaddockFlags -> p -> FilePath-haddockOutputDir flags pkg = destDir where-  baseDir = case haddockDistPref flags of-    NoFlag -> "."-    Flag x -> x-  destDir = baseDir </> "doc" </> "html" </> display (packageName pkg)+#if MIN_VERSION_directory(1,2,2)+import System.Directory (makeAbsolute)+#else+import System.Directory (getCurrentDirectory)+import System.FilePath (isAbsolute) -generateBuildModule :: Verbosity -> PackageDescription -> LocalBuildInfo -> IO ()-generateBuildModule verbosity pkg lbi = do-  let dir = autogenModulesDir lbi-  createDirectoryIfMissingVerbose verbosity True dir-  withLibLBI pkg lbi $ \_ libcfg -> do-    withTestLBI pkg lbi $ \suite suitecfg -> do-      rewriteFile (dir </> "Build_" ++ testName suite ++ ".hs") $ unlines-        [ "module Build_" ++ testName suite ++ " where"-        , "deps :: [String]"-        , "deps = " ++ (show $ formatdeps (testDeps libcfg suitecfg))+makeAbsolute :: FilePath -> IO FilePath+makeAbsolute p | isAbsolute p = return p+               | otherwise    = do+    cwd <- getCurrentDirectory+    return $ cwd </> p+#endif++generateBuildModule :: String -> BuildFlags -> PackageDescription -> LocalBuildInfo -> IO ()+generateBuildModule testsuiteName flags pkg lbi = do+  let verbosity = fromFlag (buildVerbosity flags)+  let distPref = fromFlag (buildDistPref flags)++  -- Package DBs+  let dbStack = withPackageDB lbi ++ [ SpecificPackageDB $ distPref </> "package.conf.inplace" ]+  let dbFlags = "-hide-all-packages" : packageDbArgs dbStack++  withLibLBI pkg lbi $ \lib libcfg -> do+    let libBI = libBuildInfo lib++    -- modules+    let modules = exposedModules lib ++ otherModules libBI+    -- it seems that doctest is happy to take in module names, not actual files!+    let module_sources = modules++    -- We need the directory with library's cabal_macros.h!+#if MIN_VERSION_Cabal(1,25,0)+    let libAutogenDir = autogenComponentModulesDir lbi libcfg+#else+    let libAutogenDir = autogenModulesDir lbi+#endif++    -- Lib sources and includes+    iArgs <- mapM (fmap ("-i"++) . makeAbsolute) $ libAutogenDir : hsSourceDirs libBI+    includeArgs <- mapM (fmap ("-I"++) . makeAbsolute) $ includeDirs libBI++    -- CPP includes, i.e. include cabal_macros.h+    let cppFlags = map ("-optP"++) $+            [ "-include", libAutogenDir ++ "/cabal_macros.h" ]+            ++ cppOptions libBI++    withTestLBI pkg lbi $ \suite suitecfg -> when (testName suite == fromString testsuiteName) $ do++      -- get and create autogen dir+#if MIN_VERSION_Cabal(1,25,0)+      let testAutogenDir = autogenComponentModulesDir lbi suitecfg+#else+      let testAutogenDir = autogenModulesDir lbi+#endif+      createDirectoryIfMissingVerbose verbosity True testAutogenDir++      -- write autogen'd file+      rewriteFile (testAutogenDir </> "Build_doctests.hs") $ unlines+        [ "module Build_doctests where"+        , ""+        -- -package-id etc. flags+        , "pkgs :: [String]"+        , "pkgs = " ++ (show $ formatDeps $ testDeps libcfg suitecfg)+        , ""+        , "flags :: [String]"+        , "flags = " ++ show (iArgs ++ includeArgs ++ dbFlags ++ cppFlags)+        , ""+        , "module_sources :: [String]"+        , "module_sources = " ++ show (map display module_sources)         ]   where-    formatdeps = map (formatone . snd)-    formatone p = case packageName p of-      PackageName n -> n ++ "-" ++ showVersion (packageVersion p)+    -- we do this check in Setup, as then doctests don't need to depend on Cabal+    isOldCompiler = maybe False id $ do+      a <- simpleParse $ showCompilerId $ compiler lbi+      b <- simpleParse "7.5"+      return $ packageVersion (a :: PackageId) < b +    formatDeps = map formatOne+    formatOne (installedPkgId, pkgId)+      -- The problem is how different cabal executables handle package databases+      -- when doctests depend on the library+      | packageId pkg == pkgId = "-package=" ++ display pkgId+      | otherwise              = "-package-id=" ++ display installedPkgId++    -- From Distribution.Simple.Program.GHC+    packageDbArgs :: [PackageDB] -> [String]+    packageDbArgs | isOldCompiler = packageDbArgsConf+                  | otherwise     = packageDbArgsDb++    -- GHC <7.6 uses '-package-conf' instead of '-package-db'.+    packageDbArgsConf :: [PackageDB] -> [String]+    packageDbArgsConf dbstack = case dbstack of+      (GlobalPackageDB:UserPackageDB:dbs) -> concatMap specific dbs+      (GlobalPackageDB:dbs)               -> ("-no-user-package-conf")+                                           : concatMap specific dbs+      _ -> ierror+      where+        specific (SpecificPackageDB db) = [ "-package-conf=" ++ db ]+        specific _                      = ierror+        ierror = error $ "internal error: unexpected package db stack: "+                      ++ show dbstack++    -- GHC >= 7.6 uses the '-package-db' flag. See+    -- https://ghc.haskell.org/trac/ghc/ticket/5977.+    packageDbArgsDb :: [PackageDB] -> [String]+    -- special cases to make arguments prettier in common scenarios+    packageDbArgsDb dbstack = case dbstack of+      (GlobalPackageDB:UserPackageDB:dbs)+        | all isSpecific dbs              -> concatMap single dbs+      (GlobalPackageDB:dbs)+        | all isSpecific dbs              -> "-no-user-package-db"+                                           : concatMap single dbs+      dbs                                 -> "-clear-package-db"+                                           : concatMap single dbs+     where+       single (SpecificPackageDB db) = [ "-package-db=" ++ db ]+       single GlobalPackageDB        = [ "-global-package-db" ]+       single UserPackageDB          = [ "-user-package-db" ]+       isSpecific (SpecificPackageDB _) = True+       isSpecific _                     = False+ testDeps :: ComponentLocalBuildInfo -> ComponentLocalBuildInfo -> [(InstalledPackageId, PackageId)] testDeps xs ys = nub $ componentPackageDeps xs ++ componentPackageDeps ys++defaultMainWithDoctests :: String -> IO ()+defaultMainWithDoctests testSuiteName = defaultMainWithHooks simpleUserHooks+  { buildHook = \pkg lbi hooks flags -> do+     generateBuildModule testSuiteName flags pkg lbi+     buildHook simpleUserHooks pkg lbi hooks flags+  }++#endif++main :: IO ()+main = defaultMainWithDoctests "doctests"  \end{code}
folds.cabal view
@@ -1,6 +1,6 @@ name:          folds category:      Data, Comonads, Enumerator-version:       0.7.1+version:       0.7.2 license:       BSD3 cabal-version: >= 1.8 license-file:  LICENSE@@ -29,6 +29,12 @@   .   More information on this approach can be found in the <http://conal.net/blog/posts/another-lovely-example-of-type-class-morphisms "Another lovely example of type class morphisms"> and <http://conal.net/blog/posts/more-beautiful-fold-zipping "More beautiful fold zipping"> posts by Conal Elliott, as well as in Gabriel Gonzales' <http://www.haskellforall.com/2013/08/composable-streaming-folds.html "Composable Streaming Folds"> +custom-setup+  setup-depends:+    base          >= 4.3 && <5,+    Cabal         >= 1.10,+    cabal-doctest >= 1 && <1.1+ source-repository head   type: git   location: git://github.com/ekmett/folds.git@@ -66,7 +72,7 @@     semigroupoids     >= 4     && < 6,     transformers      >= 0.3   && < 0.6,     unordered-containers >= 0.2 && < 0.3,-    vector            >= 0.10  && < 0.12+    vector            >= 0.10  && < 0.13    if impl(ghc < 7.8)     build-depends: tagged >= 0.7 && < 1@@ -113,7 +119,7 @@   ghc-options:    -Wall -threaded   hs-source-dirs: tests -  if !flag(test-doctests) || impl(ghc >= 8)+  if !flag(test-doctests)     buildable: False   else     build-depends:
+ tests/doctests.hs view
@@ -0,0 +1,25 @@+-----------------------------------------------------------------------------+-- |+-- Module      :  Main (doctests)+-- Copyright   :  (C) 2012-14 Edward Kmett+-- License     :  BSD-style (see the file LICENSE)+-- Maintainer  :  Edward Kmett <ekmett@gmail.com>+-- Stability   :  provisional+-- Portability :  portable+--+-- This module provides doctests for a project based on the actual versions+-- of the packages it was built with. It requires a corresponding Setup.lhs+-- to be added to the project+-----------------------------------------------------------------------------+module Main where++import Build_doctests (flags, pkgs, module_sources)+import Data.Foldable (traverse_)+import Test.DocTest++main :: IO ()+main = do+    traverse_ putStrLn args+    doctest args+  where+    args = flags ++ pkgs ++ module_sources
− tests/doctests.hsc
@@ -1,73 +0,0 @@-{-# LANGUAGE CPP #-}-{-# LANGUAGE ForeignFunctionInterface #-}--------------------------------------------------------------------------------- |--- Module      :  Main (doctests)--- Copyright   :  (C) 2012-13 Edward Kmett--- License     :  BSD-style (see the file LICENSE)--- Maintainer  :  Edward Kmett <ekmett@gmail.com>--- Stability   :  provisional--- Portability :  portable------ This module provides doctests for a project based on the actual versions--- of the packages it was built with. It requires a corresponding Setup.lhs--- to be added to the project-------------------------------------------------------------------------------module Main where--import Build_doctests (deps)-import Control.Applicative-import Control.Monad-import Data.List-import System.Directory-import System.FilePath-import Test.DocTest--##if defined(mingw32_HOST_OS)-##if defined(i386_HOST_ARCH)-##define USE_CP-import Control.Applicative-import Control.Exception-import Foreign.C.Types-foreign import stdcall "windows.h SetConsoleCP" c_SetConsoleCP :: CUInt -> IO Bool-foreign import stdcall "windows.h GetConsoleCP" c_GetConsoleCP :: IO CUInt-##elif defined(x86_64_HOST_ARCH)-##define USE_CP-import Control.Applicative-import Control.Exception-import Foreign.C.Types-foreign import ccall "windows.h SetConsoleCP" c_SetConsoleCP :: CUInt -> IO Bool-foreign import ccall "windows.h GetConsoleCP" c_GetConsoleCP :: IO CUInt-##endif-##endif---- | Run in a modified codepage where we can print UTF-8 values on Windows.-withUnicode :: IO a -> IO a-##ifdef USE_CP-withUnicode m = do-  cp <- c_GetConsoleCP-  (c_SetConsoleCP 65001 >> m) `finally` c_SetConsoleCP cp-##else-withUnicode m = m-##endif--main :: IO ()-main = withUnicode $ getSources >>= \sources -> doctest $-    "-isrc"-  : "-idist/build/autogen"-  : "-optP-include"-  : "-optPdist/build/autogen/cabal_macros.h"-  : "-hide-all-packages"-  : map ("-package="++) deps ++ sources--getSources :: IO [FilePath]-getSources = filter (isSuffixOf ".hs") <$> go "src"-  where-    go dir = do-      (dirs, files) <- getFilesAndDirectories dir-      (files ++) . concat <$> mapM go dirs--getFilesAndDirectories :: FilePath -> IO ([FilePath], [FilePath])-getFilesAndDirectories dir = do-  c <- map (dir </>) . filter (`notElem` ["..", "."]) <$> getDirectoryContents dir-  (,) <$> filterM doesDirectoryExist c <*> filterM doesFileExist c