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我可以得到下面的ghc編譯器工作使用ghc api來編譯單個文件。我想獲取重命名的AST haskell源代碼（AST with all function來電完全合格）得到重命名（具有完全合格的導入）haskell AST使用ghc api
ghcmake = defaultErrorHandler defaultFatalMessager defaultFlushOut $ do
runGhc (Just GP.libdir) $ do
dflags <- getSessionDynFlags
setSessionDynFlags dflags
target <- guessTarget targetFile Nothing
setTargets [target]
load LoadAllTargets
從這個簡單的演示，重命名過程應該在「加載」功能中完成。
源是這裏
（文件：///usr/local/haskell/ghc-7.10.2-x86_64/share/doc/ghc/html/libraries/ghc-7.10.2/src/ GhcMake.html＃負載）
load :: GhcMonad m => LoadHowMuch -> m SuccessFlag Source
此函數實現GHC的--make模式的核心。它預處理，編譯和加載指定模塊，儘可能避免重新編譯 。根據目標（請參閱 hscTarget）編譯和加載可能會導致在磁盤上創建文件 。
load :: GhcMonad m => LoadHowMuch -> m SuccessFlag
load how_much = do
mod_graph <- depanal [] False
guessOutputFile
hsc_env <- getSession
let hpt1 = hsc_HPT hsc_env
let dflags = hsc_dflags hsc_env
-- The "bad" boot modules are the ones for which we have
-- B.hs-boot in the module graph, but no B.hs
-- The downsweep should have ensured this does not happen
-- (see msDeps)
let all_home_mods = [ms_mod_name s
| s <- mod_graph, not (isBootSummary s)]
bad_boot_mods = [s | s <- mod_graph, isBootSummary s,
not (ms_mod_name s `elem` all_home_mods)]
ASSERT(null bad_boot_mods) return()
-- check that the module given in HowMuch actually exists, otherwise
-- topSortModuleGraph will bomb later.
let checkHowMuch (LoadUpTo m) = checkMod m
checkHowMuch (LoadDependenciesOf m) = checkMod m
checkHowMuch _ = id
checkMod m and_then
| m `elem` all_home_mods = and_then
| otherwise = do
liftIO $ errorMsg dflags (text "no such module:" <+>
quotes (ppr m))
return Failed
checkHowMuch how_much $ do
-- mg2_with_srcimps drops the hi-boot nodes, returning a
-- graph with cycles. Among other things, it is used for
-- backing out partially complete cycles following a failed
-- upsweep, and for removing from hpt all the modules
-- not in strict downwards closure, during calls to compile.
let mg2_with_srcimps :: [SCC ModSummary]
mg2_with_srcimps = topSortModuleGraph True mod_graph Nothing
-- If we can determine that any of the {-# SOURCE #-} imports
-- are definitely unnecessary, then emit a warning.
warnUnnecessarySourceImports mg2_with_srcimps
let
-- check the stability property for each module.
[email protected](stable_obj,stable_bco)
= checkStability hpt1 mg2_with_srcimps all_home_mods
-- prune bits of the HPT which are definitely redundant now,
-- to save space.
pruned_hpt = pruneHomePackageTable hpt1
(flattenSCCs mg2_with_srcimps)
stable_mods
_ <- liftIO $ evaluate pruned_hpt
-- before we unload anything, make sure we don't leave an old
-- interactive context around pointing to dead bindings. Also,
-- write the pruned HPT to allow the old HPT to be GC'd.
modifySession $ \_ -> discardIC $ hsc_env { hsc_HPT = pruned_hpt }
liftIO $ debugTraceMsg dflags 2 (text "Stable obj:" <+> ppr stable_obj $$
text "Stable BCO:" <+> ppr stable_bco)
-- Unload any modules which are going to be re-linked this time around.
let stable_linkables = [ linkable
| m <- stable_obj++stable_bco,
Just hmi <- [lookupUFM pruned_hpt m],
Just linkable <- [hm_linkable hmi] ]
liftIO $ unload hsc_env stable_linkables
-- We could at this point detect cycles which aren't broken by
-- a source-import, and complain immediately, but it seems better
-- to let upsweep_mods do this, so at least some useful work gets
-- done before the upsweep is abandoned.
--hPutStrLn stderr "after tsort:\n"
--hPutStrLn stderr (showSDoc (vcat (map ppr mg2)))
-- Now do the upsweep, calling compile for each module in
-- turn. Final result is version 3 of everything.
-- Topologically sort the module graph, this time including hi-boot
-- nodes, and possibly just including the portion of the graph
-- reachable from the module specified in the 2nd argument to load.
-- This graph should be cycle-free.
-- If we're restricting the upsweep to a portion of the graph, we
-- also want to retain everything that is still stable.
let full_mg :: [SCC ModSummary]
full_mg = topSortModuleGraph False mod_graph Nothing
maybe_top_mod = case how_much of
LoadUpTo m -> Just m
LoadDependenciesOf m -> Just m
_ -> Nothing
partial_mg0 :: [SCC ModSummary]
partial_mg0 = topSortModuleGraph False mod_graph maybe_top_mod
-- LoadDependenciesOf m: we want the upsweep to stop just
-- short of the specified module (unless the specified module
-- is stable).
partial_mg
| LoadDependenciesOf _mod <- how_much
= ASSERT(case last partial_mg0 of
AcyclicSCC ms -> ms_mod_name ms == _mod; _ -> False)
List.init partial_mg0
| otherwise
= partial_mg0
stable_mg =
[ AcyclicSCC ms
| AcyclicSCC ms <- full_mg,
ms_mod_name ms `elem` stable_obj++stable_bco ]
-- the modules from partial_mg that are not also stable
-- NB. also keep cycles, we need to emit an error message later
unstable_mg = filter not_stable partial_mg
where not_stable (CyclicSCC _) = True
not_stable (AcyclicSCC ms)
= ms_mod_name ms `notElem` stable_obj++stable_bco
-- Load all the stable modules first, before attempting to load
-- an unstable module (#7231).
mg = stable_mg ++ unstable_mg
-- clean up between compilations
let cleanup hsc_env = intermediateCleanTempFiles (hsc_dflags hsc_env)
(flattenSCCs mg2_with_srcimps)
hsc_env
liftIO $ debugTraceMsg dflags 2 (hang (text "Ready for upsweep")
2 (ppr mg))
n_jobs <- case parMakeCount dflags of
Nothing -> liftIO getNumProcessors
Just n -> return n
let upsweep_fn | n_jobs > 1 = parUpsweep n_jobs
| otherwise = upsweep
setSession hsc_env{ hsc_HPT = emptyHomePackageTable }
(upsweep_ok, modsUpswept)
<- upsweep_fn pruned_hpt stable_mods cleanup mg
-- Make modsDone be the summaries for each home module now
-- available; this should equal the domain of hpt3.
-- Get in in a roughly top .. bottom order (hence reverse).
let modsDone = reverse modsUpswept
-- Try and do linking in some form, depending on whether the
-- upsweep was completely or only partially successful.
if succeeded upsweep_ok
then
-- Easy; just relink it all.
do liftIO $ debugTraceMsg dflags 2 (text "Upsweep completely successful.")
-- Clean up after ourselves
hsc_env1 <- getSession
liftIO $ intermediateCleanTempFiles dflags modsDone hsc_env1
-- Issue a warning for the confusing case where the user
-- said '-o foo' but we're not going to do any linking.
-- We attempt linking if either (a) one of the modules is
-- called Main, or (b) the user said -no-hs-main, indicating
-- that main() is going to come from somewhere else.
--
let ofile = outputFile dflags
let no_hs_main = gopt Opt_NoHsMain dflags
let
main_mod = mainModIs dflags
a_root_is_Main = any ((==main_mod).ms_mod) mod_graph
do_linking = a_root_is_Main || no_hs_main || ghcLink dflags == LinkDynLib || ghcLink dflags == LinkStaticLib
when (ghcLink dflags == LinkBinary
&& isJust ofile && not do_linking) $
liftIO $ debugTraceMsg dflags 1 $
text ("Warning: output was redirected with -o, " ++
"but no output will be generated\n" ++
"because there is no " ++
moduleNameString (moduleName main_mod) ++ " module.")
-- link everything together
linkresult <- liftIO $ link (ghcLink dflags) dflags do_linking (hsc_HPT hsc_env1)
loadFinish Succeeded linkresult
的代碼片段上述檢查該模塊依賴是好的，但在此之後它似乎直接跳到鏈接??我找不到鏈接功能。
linkresult <- liftIO $ link (ghcLink dflags) dflags do_linking (hsc_HPT hsc_env1)
loadFinish Succeeded linkresult
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