122 lines
4.1 KiB
Haskell
122 lines
4.1 KiB
Haskell
{- git-annex command infrastructure
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-
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- Copyright 2010-2015 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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module Command,
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module ReExported
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) where
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import Annex.Common as ReExported
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import Annex.WorkTree as ReExported (whenAnnexed, ifAnnexed)
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import Types.Command as ReExported
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import Types.DeferredParse as ReExported
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import CmdLine.Seek 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.GlobalSetter as ReExported
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import CmdLine.GitAnnex.Options as ReExported
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import CmdLine.Batch as ReExported
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import Options.Applicative as ReExported hiding (command)
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import qualified Git
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import Annex.Init
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import Config
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import Utility.Daemon
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{- Generates a normal Command -}
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command :: String -> CommandSection -> String -> CmdParamsDesc -> (CmdParamsDesc -> CommandParser) -> Command
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command name section desc paramdesc mkparser =
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Command commonChecks False False name paramdesc
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section desc (mkparser paramdesc) Nothing
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{- Simple option parser that takes all non-option params as-is. -}
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withParams :: (CmdParams -> v) -> CmdParamsDesc -> Parser v
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withParams mkseek paramdesc = mkseek <$> cmdParams paramdesc
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{- Uses the supplied option parser, which yields a deferred parse,
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- and calls finishParse on the result before passing it to the
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- CommandSeek constructor. -}
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(<--<) :: DeferredParseClass a
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=> (a -> CommandSeek)
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-> (CmdParamsDesc -> Parser a)
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-> CmdParamsDesc
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-> Parser CommandSeek
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(<--<) mkseek optparser paramsdesc =
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(mkseek <=< finishParse) <$> optparser paramsdesc
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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 the usual messages when
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- starting or stopping processing a file or other item. Unless --json mode
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- is enabled, this also enables quiet output mode, so only things
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- explicitly output by the command are shown and not progress messages
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- etc. -}
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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 :: (String -> Parser (IO ())) -> Command -> Command
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noRepo a c = c { cmdnorepo = Just (a (cmdparamdesc c)) }
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{- Adds global options to a command's option parser, and modifies its seek
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- option to first run actions for them.
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-}
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withGlobalOptions :: [GlobalOption] -> Command -> Command
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withGlobalOptions os c = c { cmdparser = apply <$> mixin (cmdparser c) }
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where
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mixin p = (,)
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<$> p
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<*> combineGlobalOptions os
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apply (seek, globalsetters) = do
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void $ getParsed globalsetters
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seek
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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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commonChecks :: [CommandCheck]
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commonChecks = [repoExists]
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repoExists :: CommandCheck
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repoExists = CommandCheck 0 ensureInitialized
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notDirect :: Command -> Command
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notDirect = addCheck $ whenM isDirect $
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error "You cannot run this command in a direct mode repository."
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notBareRepo :: Command -> Command
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notBareRepo = addCheck $ whenM (fromRepo Git.repoIsLocalBare) $
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error "You cannot run this command in a bare repository."
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noDaemonRunning :: Command -> Command
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noDaemonRunning = addCheck $ whenM (isJust <$> daemonpid) $
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error "You cannot run this command while git-annex watch or git-annex assistant is running."
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where
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daemonpid = liftIO . checkDaemon =<< fromRepo gitAnnexPidFile
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dontCheck :: CommandCheck -> Command -> Command
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dontCheck check cmd = mutateCheck cmd $ \c -> filter (/= check) c
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addCheck :: Annex () -> Command -> Command
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addCheck check cmd = mutateCheck cmd $ \c ->
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CommandCheck (length c + 100) check : c
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mutateCheck :: Command -> ([CommandCheck] -> [CommandCheck]) -> Command
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mutateCheck cmd@(Command { cmdcheck = c }) a = cmd { cmdcheck = a c }
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