Support GHC 9.12.1 (#39)

* Support GHC 9.12.1

* Ran Fourmolu on PrintApi.CLI.Cmd.Dump

compat/9.10.1/GHC/Compat.hs

@@ -1,11 +1,19 @@
--- GHC 9.10.1 Compatibility
-module GHC.Compat where
+-- GHC 9.10.1 compatibility
+module GHC.Compat
+  ( mkNamePprCtxForModule
+  , mkShowSub
+  ) where
 
-import GHC (ModuleInfo)
+import Data.Maybe (fromJust)
+import GHC (Ghc, Module, ModuleInfo, NamePprCtx)
+import GHC qualified
 import GHC.Iface.Syntax (AltPpr (..), ShowForAllFlag (..), ShowHowMuch (..), ShowSub (..))
 
 import PrintApi.IgnoredDeclarations
 
+mkNamePprCtxForModule :: Module -> ModuleInfo -> Ghc NamePprCtx
+mkNamePprCtxForModule _ mod_info = fromJust <$> GHC.mkNamePprCtxForModule mod_info
+
 mkShowSub :: ModuleInfo -> ShowSub
 mkShowSub mod_info =
   let ss_how_much = ShowSome (Just (showOcc mod_info)) (AltPpr Nothing)

compat/9.12.1/GHC/Compat.hs

@@ -0,0 +1,19 @@
+-- GHC 9.12.1 compatibility
+module GHC.Compat
+  ( GHC.mkNamePprCtxForModule
+  , mkShowSub
+  ) where
+
+import GHC (ModuleInfo)
+import GHC qualified
+import GHC.Iface.Syntax (AltPpr (..), ShowForAllFlag (..), ShowHowMuch (..), ShowSub (..))
+
+import PrintApi.IgnoredDeclarations
+
+mkShowSub :: ModuleInfo -> ShowSub
+mkShowSub mod_info =
+  let ss_how_much = ShowSome (Just (showOcc mod_info)) (AltPpr Nothing)
+   in ShowSub
+        { ss_how_much = ss_how_much
+        , ss_forall = ShowForAllMust
+        }

compat/9.6.6/GHC/Compat.hs

@@ -1,9 +1,17 @@
--- GHC 9.6.6 Compatibility
-module GHC.Compat where
+-- GHC 9.6.6 compatibility
+module GHC.Compat
+  ( mkNamePprCtxForModule
+  , mkShowSub
+  ) where
 
-import GHC (ModuleInfo)
+import Data.Maybe (fromJust)
+import GHC (Ghc, Module, ModuleInfo, NamePprCtx)
+import GHC qualified
 import GHC.Iface.Syntax (AltPpr (..), ShowForAllFlag (..), ShowHowMuch (..), ShowSub (..))
 
+mkNamePprCtxForModule :: Module -> ModuleInfo -> Ghc NamePprCtx
+mkNamePprCtxForModule _ mod_info = fromJust <$> GHC.mkNamePprCtxForModule mod_info
+
 mkShowSub :: ModuleInfo -> ShowSub
 mkShowSub _mod_info =
   let ss_how_much = ShowSome [] (AltPpr Nothing)

compat/9.8.4/GHC/Compat.hs

@@ -1,9 +1,16 @@
--- GHC 9.10.1 Compatibility
-module GHC.Compat where
+-- GHC 9.8.4 compatibility
+module GHC.Compat
+  ( mkNamePprCtxForModule
+  , mkShowSub
+  ) where
 
-import GHC (ModuleInfo)
+import Data.Maybe (fromJust)
+import GHC (Ghc, Module, ModuleInfo, NamePprCtx)
+import GHC qualified
 import GHC.Iface.Syntax (AltPpr (..), ShowForAllFlag (..), ShowHowMuch (..), ShowSub (..))
-import PrintApi.IgnoredDeclarations ()
+
+mkNamePprCtxForModule :: Module -> ModuleInfo -> Ghc NamePprCtx
+mkNamePprCtxForModule _ mod_info = fromJust <$> GHC.mkNamePprCtxForModule mod_info
 
 mkShowSub :: ModuleInfo -> ShowSub
 mkShowSub _ =

print-api.cabal

@@ -12,10 +12,11 @@ maintainer:         hecate+github@glitchbra.in
 copyright:          © 2023 Ben Gamari, 2024 Hécate Kleidukos
 extra-source-files:
   compat/9.10.1/GHC/Compat.hs
+  compat/9.12.1/GHC/Compat.hs
   compat/9.6.6/GHC/Compat.hs
   compat/9.8.4/GHC/Compat.hs
 
-tested-with:        GHC ==9.6.6 || ==9.8.4 || ==9.10.1
+tested-with:        GHC ==9.6.6 || ==9.8.4 || ==9.10.1 || ==9.12.1
 
 common extensions
   default-extensions:
@@ -69,14 +70,17 @@ library
   import:          ghc-options
   hs-source-dirs:  src
 
-  if impl(ghc ==9.10.1)
-    hs-source-dirs: compat/9.10.1
+  if impl(ghc ==9.6.6)
+    hs-source-dirs: compat/9.6.6
 
   if impl(ghc ==9.8.4)
     hs-source-dirs: compat/9.8.4
 
-  if impl(ghc ==9.6.6)
-    hs-source-dirs: compat/9.6.6
+  if impl(ghc ==9.10.1)
+    hs-source-dirs: compat/9.10.1
+
+  if impl(ghc ==9.12.1)
+    hs-source-dirs: compat/9.12.1
 
   other-modules:   Paths_print_api
   autogen-modules: Paths_print_api
@@ -148,6 +152,16 @@ executable print-api-9.10.1
   else
     buildable: False
 
+executable print-api-9.12.1
+  import:  print-api-common
+  main-is: Main.hs
+
+  if impl(ghc ==9.12.1)
+    buildable: True
+
+  else
+    buildable: False
+
 test-suite print-api-test
   import:         extensions
   import:         ghc-options

src/PrintApi/CLI/Cmd/Dump.hs

@@ -11,7 +11,10 @@
 --  Visibility  : Public
 --
 --  The processing of package information
-module PrintApi.CLI.Cmd.Dump where
+module PrintApi.CLI.Cmd.Dump
+  ( run
+  , computePackageAPI
+  ) where
 
 import Control.Monad.IO.Class
 import Data.Function (on, (&))
@@ -23,14 +26,15 @@ import Data.Text (Text)
 import Data.Text qualified as Text
 import Data.Text.Encoding qualified as TE
 import GHC
-  ( ModuleInfo
+  ( Module
+  , ModuleInfo
   , getModuleInfo
   , getNamePprCtx
   , lookupName
   , lookupQualifiedModule
-  , mkNamePprCtxForModule
   , modInfoExports
   , modInfoIface
+  , moduleName
   , parseDynamicFlags
   , runGhc
   , setProgramDynFlags
@@ -157,13 +161,13 @@ reportModuleDecls usePublicOnly userIgnoredModules unitId moduleName
           if usePublicOnly
             then
               if isVisible docs
-                then extractModuleDeclarations moduleName mod_info
+                then extractModuleDeclarations modl mod_info
                 else pure empty
-            else extractModuleDeclarations moduleName mod_info
+            else extractModuleDeclarations modl mod_info
 
-extractModuleDeclarations :: ModuleName -> ModuleInfo -> Ghc SDoc
-extractModuleDeclarations moduleName mod_info = do
-  Just name_ppr_ctx <- mkNamePprCtxForModule mod_info
+extractModuleDeclarations :: Module -> ModuleInfo -> Ghc SDoc
+extractModuleDeclarations modl mod_info = do
+  name_ppr_ctx <- Compat.mkNamePprCtxForModule modl mod_info
   let names = modInfoExports mod_info
   let sorted_names = List.sortBy (compare `on` nameOccName) names
   things <-
@@ -190,7 +194,7 @@ extractModuleDeclarations moduleName mod_info = do
                             (text "{-# MINIMAL" <+> ppr (classMinimalDef cls) <+> text "#-}")
                     _ -> empty
           ]
-  pure $ withUserStyle name_ppr_ctx AllTheWay $ hang (modHeader moduleName) 2 contents <> text ""
+  pure $ withUserStyle name_ppr_ctx AllTheWay $ hang (modHeader (moduleName modl)) 2 contents <> text ""
 
 reportInstances :: Ghc SDoc
 reportInstances = do