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|
{- git-annex remotes
-
- Copyright 2011 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Remote (
Remote,
uuid,
name,
storeKey,
retrieveKeyFile,
removeKey,
hasKey,
hasKeyCheap,
byName,
nameToUUID,
keyPossibilities,
remotesWithUUID,
remotesWithoutUUID
) where
import Control.Monad.State (liftIO)
import Control.Monad (when, liftM)
import Data.List
import RemoteClass
import qualified Remote.Git
import qualified Remote.S3
import Types
import UUID
import qualified Annex
import Trust
import LocationLog
{- add generators for new Remotes here -}
generators :: [Annex [Remote Annex]]
generators = [Remote.Git.generate]
{- Builds a list of all available Remotes.
- Since doing so can be expensive, the list is cached in the Annex. -}
genList :: Annex [Remote Annex]
genList = do
rs <- Annex.getState Annex.remotes
if null rs
then do
lists <- sequence generators
let rs' = concat lists
Annex.changeState $ \s -> s { Annex.remotes = rs' }
return rs'
else return rs
{- Looks up a remote by name. (Or by UUID.) -}
byName :: String -> Annex (Remote Annex)
byName "" = error "no remote specified"
byName n = do
allremotes <- genList
let match = filter matching allremotes
when (null match) $ error $
"there is no git remote named \"" ++ n ++ "\""
return $ head match
where
matching r = n == name r || n == uuid r
{- Looks up a remote by name (or by UUID), and returns its UUID. -}
nameToUUID :: String -> Annex UUID
nameToUUID "." = do -- special case for current repo
g <- Annex.gitRepo
getUUID g
nameToUUID n = liftM uuid (byName n)
{- Cost ordered lists of remotes that the LocationLog indicate may have a key.
-
- Also returns a list of UUIDs that are trusted to have the key
- (some may not have configured remotes).
-}
keyPossibilities :: Key -> Annex ([Remote Annex], [UUID])
keyPossibilities key = do
g <- Annex.gitRepo
u <- getUUID g
trusted <- trustGet Trusted
-- get uuids of all remotes that are recorded to have the key
uuids <- liftIO $ keyLocations g key
let validuuids = filter (/= u) uuids
-- note that validuuids is assumed to not have dups
let validtrusteduuids = intersect validuuids trusted
-- remotes that match uuids that have the key
allremotes <- genList
let validremotes = remotesWithUUID allremotes validuuids
return (sort validremotes, validtrusteduuids)
{- Filters a list of remotes to ones that have the listed uuids. -}
remotesWithUUID :: [Remote Annex] -> [UUID] -> [Remote Annex]
remotesWithUUID rs us = filter (\r -> uuid r `elem` us) rs
{- Filters a list of remotes to ones that do not have the listed uuids. -}
remotesWithoutUUID :: [Remote Annex] -> [UUID] -> [Remote Annex]
remotesWithoutUUID rs us = filter (\r -> uuid r `notElem` us) rs
|
