ghcup-hs/test/GHCup/Utils/FileSpec.hs

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module GHCup.Utils.FileSpec where
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import GHCup.Prelude.File
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import Data.List
import System.Directory
import System.FilePath
import System.IO.Unsafe
import qualified Streamly.Prelude as S
import Test.Hspec
spec :: Spec
spec = do
describe "GHCup.Utils.File" $ do
it "getDirectoryContentsRecursiveBFS" $ do
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l1 <- sort <$> S.toList (getDirectoryContentsRecursiveBFSUnsafe "lib")
l2 <- sort <$> getDirectoryContentsRecursiveLazy "lib"
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not (null l1) `shouldBe` True
not (null l2) `shouldBe` True
l1 `shouldBe` l2
it "getDirectoryContentsRecursiveDFS" $ do
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l1 <- sort <$> S.toList (getDirectoryContentsRecursiveDFSUnsafe "lib")
l2 <- sort <$> getDirectoryContentsRecursiveLazy "lib"
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not (null l1) `shouldBe` True
not (null l2) `shouldBe` True
l1 `shouldBe` l2
getDirectoryContentsRecursiveLazy :: FilePath -> IO [FilePath]
getDirectoryContentsRecursiveLazy topdir = recurseDirectories [""]
where
recurseDirectories :: [FilePath] -> IO [FilePath]
recurseDirectories [] = return []
recurseDirectories (dir:dirs) = unsafeInterleaveIO $ do
(files, dirs') <- collect [] [] =<< getDirectoryContents (topdir </> dir)
files' <- recurseDirectories (dirs' ++ dirs)
return (files ++ files')
where
collect files dirs' [] = return (reverse files
,reverse dirs')
collect files dirs' (entry:entries) | ignore entry
= collect files dirs' entries
collect files dirs' (entry:entries) = do
let dirEntry = dir </> entry
isDirectory <- doesDirectoryExist (topdir </> dirEntry)
if isDirectory
then collect files (dirEntry:dirs') entries
else collect (dirEntry:files) dirs' entries
ignore ['.'] = True
ignore ['.', '.'] = True
ignore _ = False