122 lines
4 KiB
Haskell
122 lines
4 KiB
Haskell
{- git-annex remotes types
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-
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- Most things should not need this, using Types instead
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-
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- Copyright 2011-2014 Joey Hess <joey@kitenet.net>
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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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module Types.Remote
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( RemoteConfigKey
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, RemoteConfig
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, RemoteTypeA(..)
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, RemoteA(..)
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, Availability(..)
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)
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where
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import Data.Map as M
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import Data.Ord
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import qualified Git
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import Types.Key
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import Types.UUID
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import Types.GitConfig
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import Types.Availability
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import Types.Creds
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import Types.UrlContents
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import Config.Cost
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import Utility.Metered
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import Git.Types
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import Utility.SafeCommand
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import Utility.Url
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type RemoteConfigKey = String
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type RemoteConfig = M.Map RemoteConfigKey String
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{- There are different types of remotes. -}
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data RemoteTypeA a = RemoteType {
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-- human visible type name
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typename :: String,
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-- enumerates remotes of this type
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enumerate :: a [Git.Repo],
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-- generates a remote of this type
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generate :: Git.Repo -> UUID -> RemoteConfig -> RemoteGitConfig -> a (Maybe (RemoteA a)),
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-- initializes or changes a remote
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setup :: Maybe UUID -> Maybe CredPair -> RemoteConfig -> a (RemoteConfig, UUID)
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}
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instance Eq (RemoteTypeA a) where
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x == y = typename x == typename y
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{- An individual remote. -}
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data RemoteA a = Remote {
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-- each Remote has a unique uuid
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uuid :: UUID,
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-- each Remote has a human visible name
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name :: RemoteName,
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-- Remotes have a use cost; higher is more expensive
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cost :: Cost,
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-- Transfers a key's contents from disk to the remote.
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-- The key should not appear to be present on the remote until
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-- all of its contents have been transferred.
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storeKey :: Key -> AssociatedFile -> MeterUpdate -> a Bool,
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-- Retrieves a key's contents to a file.
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-- (The MeterUpdate does not need to be used if it retrieves
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-- directly to the file, and not to an intermediate file.)
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retrieveKeyFile :: Key -> AssociatedFile -> FilePath -> MeterUpdate -> a Bool,
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-- retrieves a key's contents to a tmp file, if it can be done cheaply
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retrieveKeyFileCheap :: Key -> FilePath -> a Bool,
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-- removes a key's contents (succeeds if the contents are not present)
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removeKey :: Key -> a Bool,
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-- Checks if a key is present in the remote.
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-- Throws an exception if the remote cannot be accessed.
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checkPresent :: Key -> a Bool,
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-- Some remotes can checkPresent without an expensive network
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-- operation.
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checkPresentCheap :: Bool,
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-- Some remotes can provide additional details for whereis.
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whereisKey :: Maybe (Key -> a [String]),
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-- Some remotes can run a fsck operation on the remote,
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-- without transferring all the data to the local repo
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-- The parameters are passed to the fsck command on the remote.
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remoteFsck :: Maybe ([CommandParam] -> a (IO Bool)),
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-- Runs an action to repair the remote's git repository.
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repairRepo :: Maybe (a Bool -> a (IO Bool)),
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-- a Remote has a persistent configuration store
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config :: RemoteConfig,
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-- git repo for the Remote
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repo :: Git.Repo,
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-- a Remote's configuration from git
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gitconfig :: RemoteGitConfig,
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-- a Remote can be assocated with a specific local filesystem path
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localpath :: Maybe FilePath,
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-- a Remote can be known to be readonly
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readonly :: Bool,
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-- a Remote can be globally available. (Ie, "in the cloud".)
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availability :: Availability,
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-- the type of the remote
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remotetype :: RemoteTypeA a,
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-- For testing, makes a version of this remote that is not
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-- available for use. All its actions should fail.
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mkUnavailable :: a (Maybe (RemoteA a)),
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-- Information about the remote, for git annex info to display.
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getInfo :: a [(String, String)],
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-- Some remotes can download from an url (or uri).
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claimUrl :: Maybe (URLString -> a Bool),
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-- Checks that the url is accessible, and gets information about
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-- its contents, without downloading the full content.
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-- Throws an exception if the url is inaccessible.
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checkUrl :: Maybe (URLString -> a UrlContents)
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}
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instance Show (RemoteA a) where
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show remote = "Remote { name =\"" ++ name remote ++ "\" }"
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-- two remotes are the same if they have the same uuid
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instance Eq (RemoteA a) where
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x == y = uuid x == uuid y
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instance Ord (RemoteA a) where
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compare = comparing uuid
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