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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,
retrieveKeyFileCheap,
removeKey,
hasKey,
hasKeyCheap,
whereisKey,
remoteTypes,
remoteList,
enabledRemoteList,
remoteMap,
uuidDescriptions,
byName,
prettyPrintUUIDs,
remotesWithUUID,
remotesWithoutUUID,
keyLocations,
keyPossibilities,
keyPossibilitiesTrusted,
nameToUUID,
showTriedRemotes,
showLocations,
forceTrust,
logStatus
) where
import qualified Data.Map as M
import Text.JSON
import Text.JSON.Generic
import Common.Annex
import Types.Remote
import qualified Annex
import Annex.UUID
import Logs.UUID
import Logs.Trust
import Logs.Location
import Remote.List
{- Map from UUIDs of Remotes to a calculated value. -}
remoteMap :: (Remote -> a) -> Annex (M.Map UUID a)
remoteMap c = M.fromList . map (\r -> (uuid r, c r)) .
filter (\r -> uuid r /= NoUUID) <$> remoteList
{- Map of UUIDs and their descriptions.
- The names of Remotes are added to suppliment any description that has
- been set for a repository. -}
uuidDescriptions :: Annex (M.Map UUID String)
uuidDescriptions = M.unionWith addName <$> uuidMap <*> remoteMap name
addName :: String -> String -> String
addName desc n
| desc == n = desc
| null desc = n
| otherwise = n ++ " (" ++ desc ++ ")"
{- When a name is specified, looks up the remote matching that name.
- (Or it can be a UUID.) Only finds currently configured git remotes. -}
byName :: Maybe String -> Annex (Maybe Remote)
byName Nothing = return Nothing
byName (Just n) = do
res <- byName' n
case res of
Left e -> error e
Right r -> return $ Just r
byName' :: String -> Annex (Either String Remote)
byName' "" = return $ Left "no remote specified"
byName' n = do
match <- filter matching <$> remoteList
if null match
then return $ Left $ "there is no git remote named \"" ++ n ++ "\""
else return $ Right $ Prelude.head match
where
matching r = n == name r || toUUID n == uuid r
{- Looks up a remote by name (or by UUID, or even by description),
- and returns its UUID. Finds even remotes that are not configured in
- .git/config. -}
nameToUUID :: String -> Annex UUID
nameToUUID "." = getUUID -- special case for current repo
nameToUUID "" = error "no remote specified"
nameToUUID n = byName' n >>= go
where
go (Right r) = return $ uuid r
go (Left e) = fromMaybe (error e) <$> bydescription
bydescription = do
m <- uuidMap
case M.lookup n $ transform swap m of
Just u -> return $ Just u
Nothing -> return $ byuuid m
byuuid m = M.lookup (toUUID n) $ transform double m
transform a = M.fromList . map a . M.toList
swap (a, b) = (b, a)
double (a, _) = (a, a)
{- Pretty-prints a list of UUIDs of remotes, for human display.
-
- Shows descriptions from the uuid log, falling back to remote names,
- as some remotes may not be in the uuid log.
-
- When JSON is enabled, also generates a machine-readable description
- of the UUIDs. -}
prettyPrintUUIDs :: String -> [UUID] -> Annex String
prettyPrintUUIDs desc uuids = do
hereu <- getUUID
m <- uuidDescriptions
maybeShowJSON [(desc, map (jsonify m hereu) uuids)]
return $ unwords $ map (\u -> "\t" ++ prettify m hereu u ++ "\n") uuids
where
finddescription m u = M.findWithDefault "" u m
prettify m hereu u
| not (null d) = fromUUID u ++ " -- " ++ d
| otherwise = fromUUID u
where
ishere = hereu == u
n = finddescription m u
d
| null n && ishere = "here"
| ishere = addName n "here"
| otherwise = n
jsonify m hereu u = toJSObject
[ ("uuid", toJSON $ fromUUID u)
, ("description", toJSON $ finddescription m u)
, ("here", toJSON $ hereu == u)
]
{- Filters a list of remotes to ones that have the listed uuids. -}
remotesWithUUID :: [Remote] -> [UUID] -> [Remote]
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] -> [UUID] -> [Remote]
remotesWithoutUUID rs us = filter (\r -> uuid r `notElem` us) rs
{- List of repository UUIDs that the location log indicates may have a key.
- Dead repositories are excluded. -}
keyLocations :: Key -> Annex [UUID]
keyLocations key = snd <$> (trustPartition DeadTrusted =<< loggedLocations key)
{- Cost ordered lists of remotes that the location log indicates
- may have a key.
-}
keyPossibilities :: Key -> Annex [Remote]
keyPossibilities key = fst <$> keyPossibilities' key []
{- Cost ordered lists of remotes that the location log indicates
- may have a key.
-
- Also returns a list of UUIDs that are trusted to have the key
- (some may not have configured remotes).
-}
keyPossibilitiesTrusted :: Key -> Annex ([Remote], [UUID])
keyPossibilitiesTrusted key = keyPossibilities' key =<< trustGet Trusted
keyPossibilities' :: Key -> [UUID] -> Annex ([Remote], [UUID])
keyPossibilities' key trusted = do
u <- getUUID
-- uuids of all remotes that are recorded to have the key
validuuids <- filter (/= u) <$> keyLocations key
-- note that validuuids is assumed to not have dups
let validtrusteduuids = validuuids `intersect` trusted
-- remotes that match uuids that have the key
allremotes <- enabledRemoteList
let validremotes = remotesWithUUID allremotes validuuids
return (sort validremotes, validtrusteduuids)
{- Displays known locations of a key. -}
showLocations :: Key -> [UUID] -> Annex ()
showLocations key exclude = do
u <- getUUID
uuids <- keyLocations key
untrusteduuids <- trustGet UnTrusted
let uuidswanted = filteruuids uuids (u:exclude++untrusteduuids)
let uuidsskipped = filteruuids uuids (u:exclude++uuidswanted)
ppuuidswanted <- Remote.prettyPrintUUIDs "wanted" uuidswanted
ppuuidsskipped <- Remote.prettyPrintUUIDs "skipped" uuidsskipped
showLongNote $ message ppuuidswanted ppuuidsskipped
where
filteruuids l x = filter (`notElem` x) l
message [] [] = "No other repository is known to contain the file."
message rs [] = "Try making some of these repositories available:\n" ++ rs
message [] us = "Also these untrusted repositories may contain the file:\n" ++ us
message rs us = message rs [] ++ message [] us
showTriedRemotes :: [Remote] -> Annex ()
showTriedRemotes [] = return ()
showTriedRemotes remotes =
showLongNote $ "Unable to access these remotes: " ++
join ", " (map name remotes)
forceTrust :: TrustLevel -> String -> Annex ()
forceTrust level remotename = do
u <- nameToUUID remotename
Annex.changeState $ \s ->
s { Annex.forcetrust = M.insert u level (Annex.forcetrust s) }
{- Used to log a change in a remote's having a key. The change is logged
- in the local repo, not on the remote. The process of transferring the
- key to the remote, or removing the key from it *may* log the change
- on the remote, but this cannot always be relied on. -}
logStatus :: Remote -> Key -> LogStatus -> Annex ()
logStatus remote key = logChange key (uuid remote)
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