79 lines
2.3 KiB
Haskell
79 lines
2.3 KiB
Haskell
{- git-annex command infrastructure
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-
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- Copyright 2010-2014 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Command (
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command,
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noRepo,
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noCommit,
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noMessages,
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withOptions,
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next,
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stop,
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stopUnless,
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whenAnnexed,
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ifAnnexed,
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isBareRepo,
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module ReExported
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) where
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import Common.Annex
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import qualified Backend
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import qualified Git
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import Types.Command as ReExported
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import Types.Option as ReExported
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import CmdLine.Seek as ReExported
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import Checks as ReExported
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import CmdLine.Usage as ReExported
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import CmdLine.Action as ReExported
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import CmdLine.Option as ReExported
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import CmdLine.GitAnnex.Options as ReExported
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{- Generates a normal command -}
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command :: String -> String -> CommandSeek -> CommandSection -> String -> Command
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command = Command [] Nothing commonChecks False False
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{- Indicates that a command doesn't need to commit any changes to
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- the git-annex branch. -}
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noCommit :: Command -> Command
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noCommit c = c { cmdnocommit = True }
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{- Indicates that a command should not output anything other than what
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- it directly sends to stdout. (--json can override this). -}
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noMessages :: Command -> Command
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noMessages c = c { cmdnomessages = True }
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{- Adds a fallback action to a command, that will be run if it's used
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- outside a git repository. -}
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noRepo :: (CmdParams -> IO ()) -> Command -> Command
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noRepo a c = c { cmdnorepo = Just a }
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{- Adds options to a command. -}
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withOptions :: [Option] -> Command -> Command
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withOptions o c = c { cmdoptions = cmdoptions c ++ o }
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{- For start and perform stages to indicate what step to run next. -}
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next :: a -> Annex (Maybe a)
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next a = return $ Just a
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{- Or to indicate nothing needs to be done. -}
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stop :: Annex (Maybe a)
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stop = return Nothing
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{- Stops unless a condition is met. -}
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stopUnless :: Annex Bool -> Annex (Maybe a) -> Annex (Maybe a)
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stopUnless c a = ifM c ( a , stop )
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{- Modifies an action to only act on files that are already annexed,
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- and passes the key on to it. -}
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whenAnnexed :: (FilePath -> Key -> Annex (Maybe a)) -> FilePath -> Annex (Maybe a)
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whenAnnexed a file = ifAnnexed file (a file) (return Nothing)
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ifAnnexed :: FilePath -> (Key -> Annex a) -> Annex a -> Annex a
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ifAnnexed file yes no = maybe no yes =<< Backend.lookupFile file
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isBareRepo :: Annex Bool
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isBareRepo = fromRepo Git.repoIsLocalBare
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