Skip T5634 on Alpine

cabal-testsuite/PackageTests/Backpack/T5634/setup.test.hs

@@ -1,5 +1,8 @@
 import Test.Cabal.Prelude
-main = setupAndCabalTest $ do
+main = do
+  -- TODO: this might be a GHC bug that needs fixing
+  skipIfAlpine "bug #11041"
+  setupAndCabalTest $ do
     skipUnlessGhcVersion ">= 8.1"
     setup "configure" []
     setup "build" []

cabal-testsuite/cabal-testsuite.cabal

@@ -75,6 +75,7 @@ library
     , network-uri            >= 2.6.0.2 && < 2.7
     , network-wait          ^>= 0.1.2.0 || ^>= 0.2.0.0
     , optparse-applicative  ^>= 0.14.3.0 || ^>=0.15.1.0 || ^>=0.16.0.0 || ^>= 0.17.0.0 || ^>= 0.18.1.0
+    , os-release            ^>= 1.0.2.1
     , process               ^>= 1.2.1.0 || ^>= 1.4.2.0 || ^>= 1.6.1.0
     , regex-base            ^>= 0.94.0.1
     , regex-tdfa            ^>= 1.2.3.1 || ^>=1.3.1.0

cabal-testsuite/src/Test/Cabal/Prelude.hs

@@ -75,6 +75,7 @@ import Control.Retry (exponentialBackoff, limitRetriesByCumulativeDelay)
 import Network.Wait (waitTcpVerbose)
 import System.Environment
 import qualified System.FilePath.Glob as Glob (globDir1, compile)
+import qualified System.OsRelease as OSR
 import System.Process
 import System.IO
 import qualified System.FilePath.Posix as Posix
@@ -1079,6 +1080,15 @@ isJavaScript = buildArch == JavaScript
 skipIfWindows :: String -> IO ()
 skipIfWindows why = skipIfIO ("Windows " <> why) isWindows
 
+skipIfAlpine :: String -> IO ()
+skipIfAlpine why = do
+  mres <- OSR.parseOsRelease
+  let b = case mres of
+            Just (OSR.OsReleaseResult { OSR.osRelease = OSR.OsRelease { OSR.id = osId } })
+              | isLinux -> osId == "alpine"
+            _ -> False
+  skipIfIO ("Alpine " <> why) b
+
 skipUnlessWindows :: IO ()
 skipUnlessWindows = skipIfIO "Only interesting in Windows" (not isWindows)