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|
{- git-annex command
-
- Copyright 2010-2018 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE BangPatterns #-}
module Command.FromKey where
import Command
import qualified Annex.Queue
import Annex.Content
import qualified Annex
import qualified Backend.URL
import Network.URI
cmd :: Command
cmd = notDirect $ notBareRepo $
command "fromkey" SectionPlumbing "adds a file using a specific key"
(paramRepeating (paramPair paramKey paramPath))
(seek <$$> optParser)
data FromKeyOptions = FromKeyOptions
{ keyFilePairs :: CmdParams
, batchOption :: BatchMode
}
optParser :: CmdParamsDesc -> Parser FromKeyOptions
optParser desc = FromKeyOptions
<$> cmdParams desc
<*> parseBatchOption
seek :: FromKeyOptions -> CommandSeek
seek o = case (batchOption o, keyFilePairs o) of
(Batch fmt, _) -> commandAction $ startMass fmt
-- older way of enabling batch input, does not support BatchNull
(NoBatch, []) -> commandAction $ startMass BatchLine
(NoBatch, ps) -> do
force <- Annex.getState Annex.force
withPairs (commandAction . start force) ps
start :: Bool -> (String, FilePath) -> CommandStart
start force (keyname, file) = do
let key = mkKey keyname
unless force $ do
inbackend <- inAnnex key
unless inbackend $ giveup $
"key ("++ keyname ++") is not present in backend (use --force to override this sanity check)"
showStart "fromkey" file
next $ perform key file
startMass :: BatchFormat -> CommandStart
startMass fmt = do
showStart' "fromkey" (Just "stdin")
next (massAdd fmt)
massAdd :: BatchFormat -> CommandPerform
massAdd fmt = go True =<< map (separate (== ' ')) <$> batchLines fmt
where
go status [] = next $ return status
go status ((keyname,f):rest) | not (null keyname) && not (null f) = do
let key = mkKey keyname
ok <- perform' key f
let !status' = status && ok
go status' rest
go _ _ = giveup "Expected pairs of key and file on stdin, but got something else."
-- From user input to a Key.
-- User can input either a serialized key, or an url.
--
-- In some cases, an input can be parsed as both a key and as an uri.
-- For example, "WORM--a:a" parses as an uri. To disambiguate, check
-- the uri scheme, to see if it looks like the prefix of a key. This relies
-- on key backend names never containing a ':'.
mkKey :: String -> Key
mkKey s = case parseURI s of
Just u | not (isKeyPrefix (uriScheme u)) ->
Backend.URL.fromUrl s Nothing
_ -> case deserializeKey s of
Just k -> k
Nothing -> giveup $ "bad key/url " ++ s
perform :: Key -> FilePath -> CommandPerform
perform key file = do
ok <- perform' key file
next $ return ok
perform' :: Key -> FilePath -> Annex Bool
perform' key file = do
link <- calcRepo $ gitAnnexLink file key
liftIO $ createDirectoryIfMissing True (parentDir file)
liftIO $ createSymbolicLink link file
Annex.Queue.addCommand "add" [Param "--"] [file]
return True
|
