incremental android builds with the EvilSplicer

Build/EvilSplicer.hs

@@ -4,11 +4,12 @@
  - and the splices dumped to a log. For example:
  -   cabal build --ghc-options=-ddump-splices 2>&1 | tee log
  -
- - Along with the log, a "headers" file may also be provided, containing
+ - Along with the log, a headers file may also be provided, containing
  - additional imports needed by the template haskell code.
  -
  - This program will parse the log, and expand all splices therein,
- - modifying files in the source tree. They can then be built a second
+ - writing files to the specified destdir (which can be "." to modify
+ - the source tree directly). They can then be built a second
  - time, with a ghc that does not support TH.
  -
  - Note that template haskell code may refer to symbols that are not
@@ -31,10 +32,14 @@ import Data.Either
 import Data.List
 import Data.String.Utils
 import Data.Char
+import System.Environment
+import System.FilePath
+import System.Directory
 
 import Utility.Monad
 import Utility.Misc
 import Utility.Exception
+import Utility.Path
 
 data Coord = Coord
 	{ coordLine :: Int
@@ -150,7 +155,7 @@ splicesExtractor = rights <$> many extract
 	compilerJunkLine = restOfLine
 
 {- Modifies the source file, expanding the splices, which all must
- - have the same splicedFile.
+ - have the same splicedFile. Writes the new file to the destdir.
  -
  - Each splice's Coords refer to the original position in the file,
  - and not to its position after any previous splices may have inserted
@@ -167,12 +172,14 @@ splicesExtractor = rights <$> many extract
  - file. These are put right before the first line in the file that
  - starts with "import "
  -}
-applySplices :: Maybe String -> [Splice] -> IO ()
+applySplices :: FilePath -> Maybe String -> [Splice] -> IO ()
-applySplices imports l@(first:_) = do
+applySplices destdir imports l@(first:_) = do
 	let f = splicedFile first
+	let dest = (destdir </> f)
 	putStrLn $ "splicing " ++ f
 	lls <- map (++ "\n") . lines <$> readFileStrict f
-	writeFile f $ concat $ addimports $ expand lls l
+	createDirectoryIfMissing True (parentDir dest)
+	writeFile dest $ concat $ addimports $ expand lls l
   where
   	expand lls [] = lls
   	expand lls (s:rest) = expand (expandSplice s lls) rest
@@ -273,11 +280,18 @@ mangleCode = fix_bad_escape . remove_package_version
 	mangleSymbol "GHC.Types." = ""
 	mangleSymbol s = s
 
-main = do
+main :: IO ()
-	r <- parseFromFile splicesExtractor "log"
+main = go =<< getArgs
+  where
+	go (destdir:log:header:[]) = run destdir log (Just header)
+	go (destdir:log:[]) = run destdir log Nothing
+  	go _ = error "usage: EvilSplicer destdir logfile [headerfile]"
+
+	run destdir log mheader = do
+		r <- parseFromFile splicesExtractor log
 		case r of
 			Left e -> error $ show e
 			Right splices -> do
 				let groups = groupBy (\a b -> splicedFile a == splicedFile b) splices
-			imports <- catchMaybeIO $ readFile "imports"
+				imports <- maybe (return Nothing) (catchMaybeIO . readFile) mheader
-			mapM_ (applySplices imports) groups
+				mapM_ (applySplices destdir imports) groups

Makefile

@@ -149,12 +149,24 @@ osxapp:
 # Cross compile for Android.
 # Uses https://github.com/neurocyte/ghc-android
 android:
-	$(CABAL) configure
+	echo "Native build, to get TH splices.."
+	$(CABAL) configure -f"-Production" -O0
+	$(CABAL) build -v2 --ghc-options=-ddump-splices 2>&1 | tee dist/caballog
+	mkdir -p tmp
+	rsync -az --delete --exclude tmp . tmp/androidtree
+	cd tmp/androidtree && $(MAKE) android-stage2
+	
+android-stage2: 
+	runghc Build/EvilSplicer.hs tmp/splices dist/caballog standalone/android/evilsplicer-headers.hs
+# Copy the files with expanded splices to the source tree, but
+# only if the existing source file is not newer. (So, if a file
+# used to have TH splices but they were removed, it will be newer,
+# and not overwritten.)
+	cp -uR tmp/splices/* .
 # cabal cannot cross compile with custom build type, so workaround
 	sed -i 's/Build-type: Custom/Build-type: Simple/' git-annex.cabal
 	$$HOME/.ghc/android-14/arm-linux-androideabi-4.7/arm-linux-androideabi/bin/cabal configure -f'Android Assistant -Pairing -Webapp'
 	$(MAKE) git-annex
-	sed -i 's/Build-type: Simple/Build-type: Custom/' git-annex.cabal
 
 androidapp:
 	$(MAKE) android

standalone/android/Makefile

@@ -32,7 +32,7 @@ build: start
 	# Install executables as pseudo-libraries so they will be
 	# unpacked from the .apk.
 	mkdir -p $(GIT_ANNEX_ANDROID_SOURCETREE)/term/libs/armeabi
-	cp ../../git-annex $(GIT_ANNEX_ANDROID_SOURCETREE)/term/libs/armeabi/lib.git-annex.so
+	cp ../../tmp/androidtree/git-annex $(GIT_ANNEX_ANDROID_SOURCETREE)/term/libs/armeabi/lib.git-annex.so
 	cp $(GIT_ANNEX_ANDROID_SOURCETREE)/busybox/busybox $(GIT_ANNEX_ANDROID_SOURCETREE)/term/libs/armeabi/lib.busybox.so
 	cp $(GIT_ANNEX_ANDROID_SOURCETREE)/openssh/ssh $(GIT_ANNEX_ANDROID_SOURCETREE)/term/libs/armeabi/lib.ssh.so
 	cp $(GIT_ANNEX_ANDROID_SOURCETREE)/openssh/ssh-keygen $(GIT_ANNEX_ANDROID_SOURCETREE)/term/libs/armeabi/lib.ssh-keygen.so

standalone/android/evilsplicer-headers.hs

@@ -0,0 +1,17 @@
+
+
+{- This file was modified by the EvilSplicer, adding these headers,
+ - and expanding Template Haskell. 
+ -
+ - ** DO NOT COMMIT ** 
+ -}
+import qualified Data.Text.Lazy.Builder
+import qualified Text.Shakespeare
+import qualified Text.Hamlet
+import qualified Text.Julius
+import qualified "blaze-markup" Text.Blaze.Internal
+import qualified Data.Monoid
+import qualified Yesod.Widget
+{- End EvilSplicer headers. -}
+
+