99 lines
3 KiB
Haskell
99 lines
3 KiB
Haskell
{- git-annex command
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-
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- Copyright 2010-2019 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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{-# LANGUAGE BangPatterns #-}
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module Command.FromKey where
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import Command
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import qualified Annex.Queue
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import Annex.Content
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import Annex.WorkTree
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import qualified Annex
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import qualified Backend.URL
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import Network.URI
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cmd :: Command
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cmd = notBareRepo $ withGlobalOptions [jsonOptions] $
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command "fromkey" SectionPlumbing "adds a file using a specific key"
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(paramRepeating (paramPair paramKey paramPath))
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(seek <$$> optParser)
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data FromKeyOptions = FromKeyOptions
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{ keyFilePairs :: CmdParams
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, batchOption :: BatchMode
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}
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optParser :: CmdParamsDesc -> Parser FromKeyOptions
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optParser desc = FromKeyOptions
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<$> cmdParams desc
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<*> parseBatchOption
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seek :: FromKeyOptions -> CommandSeek
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seek o = case (batchOption o, keyFilePairs o) of
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(Batch fmt, _) -> seekBatch fmt
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-- older way of enabling batch input, does not support BatchNull
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(NoBatch, []) -> seekBatch BatchLine
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(NoBatch, ps) -> do
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force <- Annex.getState Annex.force
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withPairs (commandAction . start force) ps
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seekBatch :: BatchFormat -> CommandSeek
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seekBatch fmt = batchInput fmt parse commandAction
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where
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parse s =
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let (keyname, file) = separate (== ' ') s
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in if not (null keyname) && not (null file)
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then Right $ go file (keyOpt keyname)
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else Left "Expected pairs of key and filename"
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go file key = starting "fromkey" (mkActionItem (key, toRawFilePath file)) $
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perform key file
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start :: Bool -> (String, FilePath) -> CommandStart
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start force (keyname, file) = do
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let key = keyOpt keyname
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unless force $ do
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inbackend <- inAnnex key
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unless inbackend $ giveup $
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"key ("++ keyname ++") is not present in backend (use --force to override this sanity check)"
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starting "fromkey" (mkActionItem (key, toRawFilePath file)) $
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perform key file
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-- From user input to a Key.
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-- User can input either a serialized key, or an url.
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--
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-- In some cases, an input can be parsed as both a key and as an uri.
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-- For example, "WORM--a:a" parses as an uri. To disambiguate, check
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-- the uri scheme, to see if it looks like the prefix of a key. This relies
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-- on key backend names never containing a ':'.
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keyOpt :: String -> Key
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keyOpt s = case parseURI s of
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Just u | not (isKeyPrefix (uriScheme u)) ->
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Backend.URL.fromUrl s Nothing
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_ -> case deserializeKey s of
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Just k -> k
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Nothing -> giveup $ "bad key/url " ++ s
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perform :: Key -> FilePath -> CommandPerform
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perform key file = lookupFileNotHidden (toRawFilePath file) >>= \case
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Nothing -> ifM (liftIO $ doesFileExist file)
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( hasothercontent
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, do
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link <- calcRepo $ gitAnnexLink file key
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liftIO $ createDirectoryIfMissing True (parentDir file)
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liftIO $ createSymbolicLink link file
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Annex.Queue.addCommand "add" [Param "--"] [file]
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next $ return True
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)
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Just k
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| k == key -> next $ return True
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| otherwise -> hasothercontent
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where
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hasothercontent = do
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warning $ file ++ " already exists with different content"
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next $ return False
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