Launch ghcide/HLS for tests with -j2 to limit amount of memory used

Reminder that ghcide requires at least 2 capabilities

Author: pepeiborra

ghcide/test/exe/Main.hs

@@ -3869,7 +3869,7 @@ runInDir' dir startExeIn startSessionIn extraOptions s = do
   createDirectoryIfMissing True $ projDir ++ "/Data"
 
   let cmd = unwords $
-       [ghcideExe, "--lsp", "--test", "--verbose", "--cwd", startDir] ++ extraOptions
+       [ghcideExe, "--lsp", "--test", "--verbose", "-j2", "--cwd", startDir] ++ extraOptions
   -- HIE calls getXgdDirectory which assumes that HOME is set.
   -- Only sets HOME if it wasn't already set.
   setEnv "HOME" "/homeless-shelter" False

test/utils/Test/Hls/Util.hs

@@ -160,7 +160,7 @@ logFilePath = "hls-" ++ show ghcVersion ++ ".log"
 hlsCommand :: String
 hlsCommand = unsafePerformIO $ do
   testExe <- fromMaybe "haskell-language-server" <$> lookupEnv "HLS_TEST_EXE"
-  pure $ testExe ++ " --lsp -d -l test-logs/" ++ logFilePath
+  pure $ testExe ++ " --lsp -d -j2 -l test-logs/" ++ logFilePath
 
 hlsCommandVomit :: String
 hlsCommandVomit = hlsCommand ++ " --vomit"