add back lost check that git-annex-shell supports gcrypt

Git/Config.hs

@@ -10,6 +10,7 @@ module Git.Config where
 import qualified Data.Map as M
 import Data.Char
 import System.Process (cwd, env)
+import Control.Exception.Extensible
 
 import Common
 import Git
@@ -153,3 +154,17 @@ boolConfig False = "false"
 
 isBare :: Repo -> Bool
 isBare r = fromMaybe False $ isTrue =<< getMaybe "core.bare" r
+
+{- Runs a command to get the configuration of a repo,
+ - and returns a repo populated with the configuration, as well as the raw
+ - output of the command. -}
+fromPipe :: Repo -> String -> [CommandParam] -> IO (Either SomeException (Repo, String))
+fromPipe r cmd params = try $
+	withHandle StdoutHandle createProcessSuccess p $ \h -> do
+ 		fileEncoding h
+		val <- hGetContentsStrict h
+		r' <- store val r
+		return (r', val)
+  where
+	p = proc cmd $ toCommand params
+