108 lines
3.1 KiB
Haskell
108 lines
3.1 KiB
Haskell
{- git-annex command infrastructure
|
|
-
|
|
- Copyright 2010-2011 Joey Hess <joey@kitenet.net>
|
|
-
|
|
- Licensed under the GNU GPL version 3 or higher.
|
|
-}
|
|
|
|
module Command (
|
|
command,
|
|
noRepo,
|
|
next,
|
|
stop,
|
|
stopUnless,
|
|
prepCommand,
|
|
doCommand,
|
|
whenAnnexed,
|
|
ifAnnexed,
|
|
notBareRepo,
|
|
isBareRepo,
|
|
autoCopies,
|
|
module ReExported
|
|
) where
|
|
|
|
import Common.Annex
|
|
import qualified Backend
|
|
import qualified Annex
|
|
import qualified Git
|
|
import Types.Command as ReExported
|
|
import Seek as ReExported
|
|
import Checks as ReExported
|
|
import Options as ReExported
|
|
import Logs.Trust
|
|
import Logs.Location
|
|
import Config
|
|
|
|
{- Generates a normal command -}
|
|
command :: String -> String -> [CommandSeek] -> String -> Command
|
|
command = Command Nothing commonChecks
|
|
|
|
{- Adds a fallback action to a command, that will be run if it's used
|
|
- outside a git repository. -}
|
|
noRepo :: IO () -> Command -> Command
|
|
noRepo a c = c { cmdnorepo = Just a }
|
|
|
|
{- For start and perform stages to indicate what step to run next. -}
|
|
next :: a -> Annex (Maybe a)
|
|
next a = return $ Just a
|
|
|
|
{- Or to indicate nothing needs to be done. -}
|
|
stop :: Annex (Maybe a)
|
|
stop = return Nothing
|
|
|
|
{- Stops unless a condition is met. -}
|
|
stopUnless :: Annex Bool -> Annex (Maybe a) -> Annex (Maybe a)
|
|
stopUnless c a = do
|
|
ok <- c
|
|
if ok then a else stop
|
|
|
|
{- Prepares to run a command via the check and seek stages, returning a
|
|
- list of actions to perform to run the command. -}
|
|
prepCommand :: Command -> [String] -> Annex [CommandCleanup]
|
|
prepCommand Command { cmdseek = seek, cmdcheck = c } params = do
|
|
mapM_ runCheck c
|
|
map doCommand . concat <$> mapM (\s -> s params) seek
|
|
|
|
{- Runs a command through the start, perform and cleanup stages -}
|
|
doCommand :: CommandStart -> CommandCleanup
|
|
doCommand = start
|
|
where
|
|
start = stage $ maybe skip perform
|
|
perform = stage $ maybe failure cleanup
|
|
cleanup = stage $ status
|
|
stage = (=<<)
|
|
skip = return True
|
|
failure = showEndFail >> return False
|
|
status r = showEndResult r >> return r
|
|
|
|
{- Modifies an action to only act on files that are already annexed,
|
|
- and passes the key and backend on to it. -}
|
|
whenAnnexed :: (FilePath -> (Key, Backend Annex) -> Annex (Maybe a)) -> FilePath -> Annex (Maybe a)
|
|
whenAnnexed a file = ifAnnexed file (a file) (return Nothing)
|
|
|
|
ifAnnexed :: FilePath -> ((Key, Backend Annex) -> Annex a) -> Annex a -> Annex a
|
|
ifAnnexed file yes no = maybe no yes =<< Backend.lookupFile file
|
|
|
|
notBareRepo :: Annex a -> Annex a
|
|
notBareRepo a = do
|
|
whenM isBareRepo $
|
|
error "You cannot run this subcommand in a bare repository."
|
|
a
|
|
|
|
isBareRepo :: Annex Bool
|
|
isBareRepo = fromRepo Git.repoIsLocalBare
|
|
|
|
{- Used for commands that have an auto mode that checks the number of known
|
|
- copies of a key.
|
|
-
|
|
- In auto mode, first checks that the number of known
|
|
- copies of the key is > or < than the numcopies setting, before running
|
|
- the action. -}
|
|
autoCopies :: Key -> (Int -> Int -> Bool) -> Maybe Int -> CommandStart -> CommandStart
|
|
autoCopies key vs numcopiesattr a = Annex.getState Annex.auto >>= auto
|
|
where
|
|
auto False = a
|
|
auto True = do
|
|
needed <- getNumCopies numcopiesattr
|
|
(_, have) <- trustPartition UnTrusted =<< keyLocations key
|
|
if length have `vs` needed then a else stop
|