ad43f03626
Finally commands can define their own options. Moved --format and --print0 to be options only of find.
95 lines
3 KiB
Haskell
95 lines
3 KiB
Haskell
{- git-annex command line parsing and dispatch
|
||
-
|
||
- Copyright 2010 Joey Hess <joey@kitenet.net>
|
||
-
|
||
- Licensed under the GNU GPL version 3 or higher.
|
||
-}
|
||
|
||
module CmdLine (
|
||
dispatch,
|
||
usage,
|
||
shutdown
|
||
) where
|
||
|
||
import qualified System.IO.Error as IO
|
||
import qualified Control.Exception as E
|
||
import Control.Exception (throw)
|
||
import System.Console.GetOpt
|
||
|
||
import Common.Annex
|
||
import qualified Annex
|
||
import qualified Annex.Queue
|
||
import qualified Git
|
||
import qualified Git.Command
|
||
import Annex.Content
|
||
import Command
|
||
|
||
type Params = [String]
|
||
type Flags = [Annex ()]
|
||
|
||
{- Runs the passed command line. -}
|
||
dispatch :: Params -> [Command] -> [Option] -> String -> IO Git.Repo -> IO ()
|
||
dispatch args cmds commonoptions header getgitrepo = do
|
||
setupConsole
|
||
r <- E.try getgitrepo :: IO (Either E.SomeException Git.Repo)
|
||
case r of
|
||
Left e -> fromMaybe (throw e) (cmdnorepo cmd)
|
||
Right g -> do
|
||
state <- Annex.new g
|
||
(actions, state') <- Annex.run state $ do
|
||
sequence_ flags
|
||
prepCommand cmd params
|
||
tryRun state' cmd $ [startup] ++ actions ++ [shutdown]
|
||
where
|
||
(flags, cmd, params) = parseCmd args cmds commonoptions header
|
||
|
||
{- Parses command line, and returns actions to run to configure flags,
|
||
- the Command being run, and the remaining parameters for the command. -}
|
||
parseCmd :: Params -> [Command] -> [Option] -> String -> (Flags, Command, Params)
|
||
parseCmd argv cmds commonoptions header
|
||
| name == Nothing = err "missing command"
|
||
| null matches = err $ "unknown command " ++ fromJust name
|
||
| otherwise = check $ getOpt Permute (commonoptions ++ cmdoptions cmd) args
|
||
where
|
||
(name, args) = findname argv []
|
||
findname [] c = (Nothing, reverse c)
|
||
findname (a:as) c
|
||
| "-" `isPrefixOf` a = findname as (a:c)
|
||
| otherwise = (Just a, reverse c ++ as)
|
||
matches = filter (\c -> name == Just (cmdname c)) cmds
|
||
cmd = Prelude.head matches
|
||
check (flags, rest, []) = (flags, cmd, rest)
|
||
check (_, _, errs) = err $ concat errs
|
||
err msg = error $ msg ++ "\n\n" ++ usage header cmds commonoptions
|
||
|
||
{- Runs a list of Annex actions. Catches IO errors and continues
|
||
- (but explicitly thrown errors terminate the whole command).
|
||
-}
|
||
tryRun :: Annex.AnnexState -> Command -> [CommandCleanup] -> IO ()
|
||
tryRun = tryRun' 0
|
||
tryRun' :: Integer -> Annex.AnnexState -> Command -> [CommandCleanup] -> IO ()
|
||
tryRun' errnum _ cmd []
|
||
| errnum > 0 = error $ cmdname cmd ++ ": " ++ show errnum ++ " failed"
|
||
| otherwise = return ()
|
||
tryRun' errnum state cmd (a:as) = run >>= handle
|
||
where
|
||
run = IO.try $ Annex.run state $ do
|
||
Annex.Queue.flushWhenFull
|
||
a
|
||
handle (Left err) = showerr err >> cont False state
|
||
handle (Right (success, state')) = cont success state'
|
||
cont success s = tryRun' (if success then errnum else errnum + 1) s cmd as
|
||
showerr err = Annex.eval state $ do
|
||
showErr err
|
||
showEndFail
|
||
|
||
{- Actions to perform each time ran. -}
|
||
startup :: Annex Bool
|
||
startup = return True
|
||
|
||
{- Cleanup actions. -}
|
||
shutdown :: Annex Bool
|
||
shutdown = do
|
||
saveState
|
||
liftIO Git.Command.reap -- zombies from long-running git processes
|
||
return True
|