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{- git-annex-shell main program
 -
 - Copyright 2010 Joey Hess <joey@kitenet.net>
 -
 - Licensed under the GNU GPL version 3 or higher.
 -}

import System.Environment
import Control.Monad (when)

import qualified GitRepo as Git
import CmdLine
import Command
import Utility
import Options

import qualified Command.ConfigList
import qualified Command.InAnnex
import qualified Command.DropKey
--import qualified Command.RecvKey
--import qualified Command.SendKey

cmds :: [Command]
cmds = map adddirparam $ concat
	[ Command.ConfigList.command
	, Command.InAnnex.command
	, Command.DropKey.command
--	, Command.RecvKey.command
--	, Command.SendKey.command
	]
	where
		adddirparam c = c { cmdparams = "DIRECTORY " ++ cmdparams c }

header :: String
header = "Usage: git-annex-shell [-c] command [option ..]"

main :: IO ()
main = do
	args <- getArgs
	main' args

main' :: [String] -> IO ()
main' [] = failure
-- skip leading -c options, passed by eg, ssh
main' ("-c":p) = main' p
-- Since git-annex explicitly runs git-annex-shell, we will be passed 
-- a redundant "git-annex-shell" parameter when we're the user's login shell.
main' ("git-annex-shell":p) = main' p
-- a command can be either a builtin or something to pass to git-shell
main' c@(cmd:dir:params)
	| elem cmd builtins = builtin cmd dir params
	| otherwise = external c
main' c@(cmd:_)
	| elem cmd builtins = failure
	| otherwise = external c

builtins :: [String]
builtins = map cmdname cmds

builtin :: String -> String -> [String] -> IO ()
builtin cmd dir params = do
	let gitrepo = Git.repoFromPath dir
	dispatch gitrepo (cmd:params) cmds commonOptions header

external :: [String] -> IO ()
external l = do
	ret <- boolSystem "git-shell" ("-c":l)
	when (not ret) $
		error "git-shell failed"

failure :: IO ()
failure = error $ "bad parameters\n\n" ++ usage header cmds commonOptions