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{- git-annex command
-
- Copyright 2010, 2015 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"
(paramPair paramKey paramPath)
(withParams seek)
seek :: CmdParams -> CommandSeek
seek ps = do
force <- Annex.getState Annex.force
withWords (start force) ps
start :: Bool -> [String] -> CommandStart
start force (keyname:file:[]) = do
let key = mkKey keyname
unless force $ do
inbackend <- inAnnex key
unless inbackend $ error $
"key ("++ keyname ++") is not present in backend (use --force to override this sanity check)"
showStart "fromkey" file
next $ perform key file
start _ [] = do
showStart "fromkey" "stdin"
next massAdd
start _ _ = error "specify a key and a dest file"
massAdd :: CommandPerform
massAdd = go True =<< map (separate (== ' ')) . lines <$> liftIO getContents
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 _ _ = error "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 file2key s of
Just k -> k
Nothing -> error $ "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
|
