move thirdparty program installation for standalone bundle into haskell program

This allows it to use Build.SysConfig to always install the programs
configure detected. Amoung other fixes, this ensures the right uuid
generator and checksum programs are installed.

I also cleaned up the handling of lsof's path; configure now checks for
it in PATH, but falls back to looking for it in sbin directories.

Build/Standalone.hs

@@ -0,0 +1,78 @@
+{- Makes standalone bundle.
+ -
+ - Copyright 2012 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+{-# LANGUAGE CPP #-}
+
+module Build.Standalone where
+
+import Control.Applicative
+import Control.Monad.IfElse
+import System.Environment
+import Data.Maybe
+import System.FilePath
+import System.Directory
+import System.IO
+import Control.Monad
+import Data.List
+import Build.SysConfig as SysConfig
+
+import Utility.PartialPrelude
+import Utility.Directory
+import Utility.Process
+import Utility.Monad
+import Utility.SafeCommand
+import Utility.Path
+
+{- Programs that git-annex uses, to include in the bundle.
+ -
+ - These may be just the command name, or the full path to it. -}
+thirdpartyProgs :: [FilePath]
+thirdpartyProgs = catMaybes
+	[ Just "git"
+	, Just "cp"
+	, Just "xargs"
+	, Just "gpg"
+	, Just "rsync"
+	, Just "ssh"
+	, Just "sh"
+	, headMaybe $ words SysConfig.uuid -- may include parameters
+	, ifset SysConfig.curl "curl"
+	, ifset SysConfig.wget "wget"
+	, ifset SysConfig.bup "bup"
+	, SysConfig.lsof
+	, SysConfig.sha1
+	, SysConfig.sha256
+	, SysConfig.sha512
+	, SysConfig.sha224
+	, SysConfig.sha384
+	]
+  where
+	ifset True s = Just s
+	ifset False _ = Nothing
+
+progDir :: FilePath -> FilePath
+#ifdef darwin_HOST_OS
+progDir topdir = topdir
+#else
+progDir topdir = topdir </> "bin"
+#endif
+
+installProg :: FilePath -> FilePath -> IO ()
+installProg dir prog = searchPath prog >>= go
+  where
+	go Nothing = error $ "cannot find " ++ prog ++ " in PATH"
+	go (Just f) = unlessM (boolSystem "install" [File f, File dir]) $
+		error $ "install failed for " ++ prog
+
+main = getArgs >>= go
+  where
+	go [] = error "specify topdir"
+        go (topdir:_) = do
+		let dir = progDir topdir
+		createDirectoryIfMissing True dir
+		forM_ thirdpartyProgs $ installProg dir
+