82 lines
2.3 KiB
Haskell
82 lines
2.3 KiB
Haskell
{- git-annex command
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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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{-# 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 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 = notDirect $ notBareRepo $
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command "fromkey" SectionPlumbing "adds a file using a specific key"
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(paramPair paramKey paramPath)
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(withParams seek)
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seek :: CmdParams -> CommandSeek
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seek ps = do
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force <- Annex.getState Annex.force
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withWords (start force) ps
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start :: Bool -> [String] -> CommandStart
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start force (keyname:file:[]) = do
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let key = mkKey keyname
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unless force $ do
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inbackend <- inAnnex key
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unless inbackend $ error $
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"key ("++ keyname ++") is not present in backend (use --force to override this sanity check)"
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showStart "fromkey" file
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next $ perform key file
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start _ [] = do
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showStart "fromkey" "stdin"
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next massAdd
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start _ _ = error "specify a key and a dest file"
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massAdd :: CommandPerform
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massAdd = go True =<< map (separate (== ' ')) . lines <$> liftIO getContents
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where
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go status [] = next $ return status
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go status ((keyname,f):rest) | not (null keyname) && not (null f) = do
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let key = mkKey keyname
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ok <- perform' key f
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let !status' = status && ok
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go status' rest
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go _ _ = error "Expected pairs of key and file on stdin, but got something else."
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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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mkKey :: String -> Key
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mkKey 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 file2key s of
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Just k -> k
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Nothing -> error $ "bad key/url " ++ s
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perform :: Key -> FilePath -> CommandPerform
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perform key file = do
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ok <- perform' key file
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next $ return ok
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perform' :: Key -> FilePath -> Annex Bool
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perform' key file = 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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return True
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