GHC 9.4 compatibility + Multiple Home Units #2994
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Perhaps we should move all the code actions that depend on |
wz1000
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I've added one commit which adds the required files for GHC 9.4 for nix. |
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I've just added naively the different nix lines. The configuration file comes from a copy of the one for 9.2. With that, we can open a shell with `nix develop .\#haskell-language-server-941-dev` and type `cabal build`. (cherry picked from commit 48084ab)
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@guibou could you help with the nix failure? |
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Minor comments only, as the slice of HLS that I understand shrinks with every GHC update.
This is a massive amount of work, thank you @wz1000 !!!
| then uses_ GetModSummary fs | ||
| else uses_ GetModSummaryWithoutTimestamps fs | ||
| return (map (NodeKey_Module . msKey) dep_mss) | ||
| ms <- msrModSummary <$> use_ GetModSummary file |
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Can use GetModSummaryWithoutTimestamps when fullModSummary is false here?
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yes, its for the new ModuleGraph which includes all ModSummarys paired with their direct dependencies (Earlier GHC versions only had the ModSummarys). It shouldn't be used for much other than mgTransDeps gives us a reasonably fast and cached way of querying for transitive dependencies (which is used in hscCompileCoreExprHook to get all the Linkables needed for a splice). I don't think omitting timestamps will matter here, especially since we omitted timestamps in the ModSummarys we put into the ModuleGraph on older GHCs.
| session' <- liftIO $ mergeEnvs hsc mss inLoadOrder depSessions | ||
| let inLoadOrder = map (\HiFileResult{..} -> HomeModInfo hirModIface hirModDetails Nothing) ifaces | ||
| #if MIN_VERSION_ghc(9,3,0) | ||
| mss_imports <- uses_ GetLocatedImports (file : deps) |
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A comment explaining why collecting the mod summaries of the direct dependencies here
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You were right, there was something fishy here. We were including the ModSummary for the current module in GHC 9.4 but not before. I've changed this to always include the current ModSummary, which allows us to not query imports of direct dependencies. We still need to get the ModSummarys of direct dependencies in order to know their Modules, which we need to reference in the ModuleGraph.
I've written a short note documenting all the assumptions we now make.
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Yes, for sure, I'll have a look at it tomorrow. |
TODO