use install_name_tool to adjust library paths in osx app

Have not yet been able to test this.

Build/OSXMkLibs.hs

@@ -47,11 +47,15 @@ installLibs appbase = do
 				return $ Just libdir
 			)
 
+{- Returns libraries to install. -}
 otool :: FilePath -> IO [FilePath]
 otool appbase = do
 	files <- filterM doesFileExist =<< dirContentsRecursive appbase
-	s <- readProcess "otool" ("-L" : files)
-	return $ nub $ parseOtool s
+	l <- forM files $ \file -> do
+		libs <- parseOtool <$> readProcess "otool" ["-L", file]
+		forM_ libs $ \lib -> install_name_tool file lib
+		return libs
+	return $ nub $ concat l
 
 parseOtool :: String -> [FilePath]
 parseOtool = catMaybes . map parse . lines
@@ -60,6 +64,22 @@ parseOtool = catMaybes . map parse . lines
 		| "\t" `isPrefixOf` l = headMaybe $ words l
 		| otherwise = Nothing
 
+{- Adjusts binaries to use libraries in paths relative to the executable.
+ -
+ - Assumes all executables are installed into the same directory, and
+ - the libraries will be installed in subdirectories that match their
+ - absolute paths. -}
+install_name_tool :: FilePath -> FilePath -> IO ()
+install_name_tool binary lib = do
+	ok <- boolSystem "install_name_tool"
+		[ Param "-change"
+		, File lib
+		, Param $ "@executable_path" ++ lib
+		, File binary
+		]
+	unless ok $
+		hPutStrLn stderr $ "install_name_tool failed for " ++ binary
+
 main :: IO ()
 main = getArgs >>= go
   where

Makefile

@@ -192,19 +192,18 @@ osxapp:
 	install -d $(GIT_ANNEX_TMP_BUILD_DIR)/build-dmg
 	cp -R standalone/osx/git-annex.app "$(OSXAPP_DEST)"
 
-	install -d "$(OSXAPP_BASE)/bin"
-	cp git-annex "$(OSXAPP_BASE)/bin/"
-	strip "$(OSXAPP_BASE)/bin/git-annex"
-	ln -sf git-annex "$(OSXAPP_BASE)/bin/git-annex-shell"
+	install -d "$(OSXAPP_BASE)"
+	cp git-annex "$(OSXAPP_BASE)"
+	strip "$(OSXAPP_BASE)/git-annex"
+	ln -sf git-annex "$(OSXAPP_BASE)/git-annex-shell"
 	gzcat standalone/licences.gz > $(OSXAPP_BASE)/LICENSE
 	cp $(OSXAPP_BASE)/LICENSE $(GIT_ANNEX_TMP_BUILD_DIR)/build-dmg/LICENSE.txt
 
 	for bin in $(THIRDPARTY_BINS); do \
-		cp "$$(which "$$bin")" "$(OSXAPP_BASE)/bin/"; \
+		cp "$$(which "$$bin")" "$(OSXAPP_BASE)"; \
 	done
 
-	install -d "$(OSXAPP_BASE)/git-core"
-	(cd "$(shell git --exec-path)" && tar c .) | (cd "$(OSXAPP_BASE)"/git-core && tar x)
+	(cd "$(shell git --exec-path)" && tar c .) | (cd "$(OSXAPP_BASE)" && tar x)
 
 	runghc Build/OSXMkLibs.hs $(OSXAPP_BASE)
 	rm -f tmp/git-annex.dmg

standalone/osx/git-annex.app/Contents/MacOS/runshell

@@ -55,18 +55,18 @@ export PATH
 # different versions of a single library. And it seems to work better
 # than DYLD_FALLBACK_LIBRARY_PATH, which fails to override old system
 # versions of libraries when a program in the app needs a newer version.
-ORIG_DYLD_ROOT_PATH="$DYLD_ROOT_PATH"
-export ORIG_DYLD_ROOT_PATH
-DYLD_ROOT_PATH=$base
-export DYLD_ROOT_PATH
+#ORIG_DYLD_ROOT_PATH="$DYLD_ROOT_PATH"
+#export ORIG_DYLD_ROOT_PATH
+#DYLD_ROOT_PATH=$base
+#export DYLD_ROOT_PATH
 
 ORIG_GIT_EXEC_PATH="$GIT_EXEC_PATH"
 export ORIG_GIT_EXEC_PATH
-GIT_EXEC_PATH=$base/git-core
+GIT_EXEC_PATH=$base
 export GIT_EXEC_PATH
 
 # Indicate which variables were exported above.
-GIT_ANNEX_STANDLONE_ENV="PATH DYLD_ROOT_PATH GIT_EXEC_PATH"
+GIT_ANNEX_STANDLONE_ENV="PATH GIT_EXEC_PATH"
 export GIT_ANNEX_STANDLONE_ENV
 
 if [ "$1" ]; then