Enable Haddock tests in GHC windows CI (#1428)

* testsuite: strip windows line endings for haddock

* hyperlinker: Work around double escaping (#19236)

* deterministic SCC

1 files changed, 10 insertions, 2 deletions

diff --git a/haddock-api/src/Haddock/Backends/Hyperlinker.hs b/haddock-api/src/Haddock/Backends/Hyperlinker.hs
index 39be6762..68e03fd5 100644
--- a/haddock-api/src/Haddock/Backends/Hyperlinker.hs
+++ b/haddock-api/src/Haddock/Backends/Hyperlinker.hs
@@ -22,7 +22,7 @@ import System.FilePath
 
 import GHC.Iface.Ext.Types  ( pattern HiePath, HieFile(..), HieASTs(..), HieAST(..), SourcedNodeInfo(..) )
 import GHC.Iface.Ext.Binary ( readHieFile, hie_file_result )
-import GHC.Types.SrcLoc     ( realSrcLocSpan, mkRealSrcLoc )
+import GHC.Types.SrcLoc     ( realSrcLocSpan, mkRealSrcLoc, srcSpanFile )
 import Data.Map as M
 import GHC.Data.FastString     ( mkFastString )
 import GHC.Unit.Module         ( Module, moduleName )
@@ -71,7 +71,7 @@ ppHyperlinkedModuleSource verbosity srcdir pretty srcs iface = case ifaceHieFile
         let fileFs = mkFastString file
             mast | M.size asts == 1 = snd <$> M.lookupMin asts
                  | otherwise        = M.lookup (HiePath (mkFastString file)) asts
-            tokens = parse df file rawSrc
+            tokens' = parse df file rawSrc
             ast = fromMaybe (emptyHieAst fileFs) mast
             fullAst = recoverFullIfaceTypes df types ast
 
@@ -81,6 +81,14 @@ ppHyperlinkedModuleSource verbosity srcdir pretty srcs iface = case ifaceHieFile
           else out verbosity verbose $ unwords [ "couldn't find ast for"
                                                , file, show (M.keys asts) ]
 
+        -- The C preprocessor can double the backslashes on tokens (see #19236),
+        -- which means the source spans will not be comparable and we will not
+        -- be able to associate the HieAST with the correct tokens.
+        --
+        -- We work around this by setting the source span of the tokens to the file
+        -- name from the HieAST
+        let tokens = fmap (\tk -> tk {tkSpan = (tkSpan tk){srcSpanFile = srcSpanFile $ nodeSpan fullAst}}) tokens'
+
         -- Produce and write out the hyperlinked sources
         writeUtf8File path . renderToString pretty . render' fullAst $ tokens
     Nothing -> return ()