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diff --git a/src/Stack/Coverage.hs b/src/Stack/Coverage.hs
index d95fa332..f80e121a 100644
--- a/src/Stack/Coverage.hs
+++ b/src/Stack/Coverage.hs
@@ -235,7 +235,7 @@ generateHpcReportForTargets opts tixFiles targetNames = do
case nc of
CTest testName ->
liftM (pkgPath </>) $ parseRelFile (T.unpack testName ++ "/" ++ T.unpack testName ++ ".tix")
- _ -> fail $
+ _ -> liftIO $ fail $
"Can't specify anything except test-suites as hpc report targets (" ++
packageNameString name ++
" is used with a non test-suite target)"
diff --git a/src/Stack/Package.hs b/src/Stack/Package.hs
index b69337ce..08eb9b9f 100644
--- a/src/Stack/Package.hs
+++ b/src/Stack/Package.hs
@@ -463,7 +463,7 @@ makeObjectFilePathFromC
makeObjectFilePathFromC cabalDir namedComponent distDir cFilePath = do
relCFilePath <- stripProperPrefix cabalDir cFilePath
relOFilePath <-
- parseRelFile (replaceExtension (toFilePath relCFilePath) "o")
+ parseRelFile (System.FilePath.replaceExtension (toFilePath relCFilePath) "o")
return (componentOutputDir namedComponent distDir </> relOFilePath)
-- | Make the global autogen dir if Cabal version is new enough.
diff --git a/src/Stack/Script.hs b/src/Stack/Script.hs
index c63c9f62..70257be1 100644
--- a/src/Stack/Script.hs
+++ b/src/Stack/Script.hs
@@ -172,8 +172,8 @@ scriptCmd opts = do
toExeName fp =
if osIsWindows
- then replaceExtension fp "exe"
- else dropExtension fp
+ then System.FilePath.replaceExtension fp "exe"
+ else System.FilePath.dropExtension fp
getPackagesFromImports
:: FilePath -- ^ script filename
diff --git a/src/Stack/Setup.hs b/src/Stack/Setup.hs
index 8bbfc45c..5c5b028c 100644
--- a/src/Stack/Setup.hs
+++ b/src/Stack/Setup.hs
@@ -876,7 +876,7 @@ buildGhcFromSource getSetupInfo' installed (CompilerRepository url) commitId fla
(_,files) <- listDir (cwd </> bindistPath)
let
isBindist p = "ghc-" `isPrefixOf` (toFilePath (filename p))
- && fileExtension (filename p) == ".xz"
+ && (maybe "" id (fileExtension (filename p))) == ".xz"
mbindist = filter isBindist files
case mbindist of
[bindist] -> do
diff --git a/src/Stack/Storage/Project.hs b/src/Stack/Storage/Project.hs
index dc5318d8..984e6259 100644
--- a/src/Stack/Storage/Project.hs
+++ b/src/Stack/Storage/Project.hs
@@ -12,6 +12,9 @@
{-# LANGUAGE UndecidableInstances #-}
{-# OPTIONS_GHC -Wno-unused-top-binds -Wno-identities #-}
+{-# LANGUAGE DerivingStrategies #-}
+{-# LANGUAGE StandaloneDeriving #-}
+
-- | Work with SQLite database used for caches across a single project.
module Stack.Storage.Project
( initProjectStorage
diff --git a/src/Stack/Storage/User.hs b/src/Stack/Storage/User.hs
index 3845b094..09695344 100644
--- a/src/Stack/Storage/User.hs
+++ b/src/Stack/Storage/User.hs
@@ -12,6 +12,9 @@
{-# LANGUAGE UndecidableInstances #-}
{-# OPTIONS_GHC -Wno-unused-top-binds -Wno-identities #-}
+{-# LANGUAGE DerivingStrategies #-}
+{-# LANGUAGE StandaloneDeriving #-}
+
-- | Work with SQLite database used for caches across an entire user account.
module Stack.Storage.User
( initUserStorage
diff --git a/src/Stack/Types/Config.hs b/src/Stack/Types/Config.hs
index a5cc22b5..a329d353 100644
--- a/src/Stack/Types/Config.hs
+++ b/src/Stack/Types/Config.hs
@@ -406,7 +406,7 @@ instance FromJSON CabalConfigKey where
instance FromJSONKey CabalConfigKey where
fromJSONKey = FromJSONKeyTextParser parseCabalConfigKey
-parseCabalConfigKey :: Monad m => Text -> m CabalConfigKey
+parseCabalConfigKey :: MonadFail m => Text -> m CabalConfigKey
parseCabalConfigKey "$targets" = pure CCKTargets
parseCabalConfigKey "$locals" = pure CCKLocals
parseCabalConfigKey "$everything" = pure CCKEverything
@@ -974,7 +974,7 @@ parseConfigMonoidObject rootDir obj = do
return ConfigMonoid {..}
where
- handleExplicitSetupDep :: Monad m => (Text, Bool) -> m (Maybe PackageName, Bool)
+ handleExplicitSetupDep :: MonadFail m => (Text, Bool) -> m (Maybe PackageName, Bool)
handleExplicitSetupDep (name', b) = do
name <-
if name' == "*"
|