From 1fa15c225b515e1fa1c6566f90f1be363a4d770f Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Sun, 26 Mar 2017 20:48:17 +0200
Subject: Revert "Use file-embed instead of hsb2hs to embed data files."

This reverts commit 10d91c147968d2e4d63b99b5b0342624827f416f.
---
 Setup.hs | 28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

(limited to 'Setup.hs')

diff --git a/Setup.hs b/Setup.hs
index 3f6bb2858..bc6651942 100644
--- a/Setup.hs
+++ b/Setup.hs
@@ -20,17 +20,41 @@ import Distribution.Simple
 import Distribution.Simple.PreProcess
 import Distribution.Simple.Setup (ConfigFlags(..), CopyFlags(..), fromFlag)
 import Distribution.PackageDescription (PackageDescription(..), FlagName(..))
+import Distribution.Simple.Utils ( rawSystemExitCode, findProgramVersion )
 import System.Exit
-import Distribution.Simple.Utils (notice, installOrdinaryFiles)
+import Distribution.Simple.Utils (info, notice, installOrdinaryFiles)
 import Distribution.Simple.Program (simpleProgram, Program(..))
 import Distribution.Simple.LocalBuildInfo
 import Control.Monad (when)
 
 main :: IO ()
 main = defaultMainWithHooks $ simpleUserHooks {
-      postCopy = installManPage
+      -- enable hsb2hs preprocessor for .hsb files
+      hookedPreProcessors = [ppBlobSuffixHandler]
+    , hookedPrograms = [(simpleProgram "hsb2hs"){
+                           programFindVersion = \verbosity fp ->
+                             findProgramVersion "--version" id verbosity fp }]
+    , postCopy = installManPage
     }
 
+ppBlobSuffixHandler :: PPSuffixHandler
+ppBlobSuffixHandler = ("hsb", \_ lbi ->
+  PreProcessor {
+    platformIndependent = True,
+    runPreProcessor = mkSimplePreProcessor $ \infile outfile verbosity ->
+      do let embedData = case lookup (FlagName "embed_data_files")
+                              (configConfigurationsFlags (configFlags lbi)) of
+                              Just True -> True
+                              _         -> False
+         when embedData $
+            do info verbosity $ "Preprocessing " ++ infile ++ " to " ++ outfile
+               ec <- rawSystemExitCode verbosity "hsb2hs"
+                          [infile, infile, outfile]
+               case ec of
+                    ExitSuccess   -> return ()
+                    ExitFailure _ -> error "hsb2hs is needed to build this program"
+  })
+
 installManPage :: Args -> CopyFlags
                -> PackageDescription -> LocalBuildInfo -> IO ()
 installManPage _ flags pkg lbi = do
-- 
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