c78b9b55b6
It's important that it be clear that it overrides a config, such that reloading the git config won't change it, and in particular, setConfig won't change it. Most of the calls to changeGitConfig were actually after setConfig, which was redundant and unncessary. So removed those. The only remaining one, besides --debug, is in the handling of repository-global config values. That one's ok, because the way mergeGitConfig is implemented, it does not override any value that is set in git config. If a value with a repo-global setting was passed to setConfig, it would set it in the git config, reload the git config, re-apply mergeGitConfig, and use the newly set value, which is the right thing.
122 lines
3.2 KiB
Haskell
122 lines
3.2 KiB
Haskell
{- git-annex uuids
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-
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- Each git repository used by git-annex has an annex.uuid setting that
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- uniquely identifies that repository.
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-
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- UUIDs of remotes are cached in git config, using keys named
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- remote.<name>.annex-uuid
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-
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- Copyright 2010-2016 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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{-# LANGUAGE OverloadedStrings #-}
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module Annex.UUID (
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configkeyUUID,
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getUUID,
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getRepoUUID,
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getUncachedUUID,
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isUUIDConfigured,
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prepUUID,
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genUUID,
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genUUIDInNameSpace,
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gCryptNameSpace,
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removeRepoUUID,
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storeUUID,
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storeUUIDIn,
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setUUID,
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webUUID,
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bitTorrentUUID,
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) where
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import Annex.Common
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import qualified Annex
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import qualified Git
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import qualified Git.Config
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import Git.Types
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import Config
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import qualified Data.UUID as U
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import qualified Data.UUID.V4 as U4
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import qualified Data.UUID.V5 as U5
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import Data.String
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configkeyUUID :: ConfigKey
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configkeyUUID = annexConfig "uuid"
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{- Generates a random UUID, that does not include the MAC address. -}
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genUUID :: IO UUID
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genUUID = toUUID <$> U4.nextRandom
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{- Generates a UUID from a given string, using a namespace.
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- Given the same namespace, the same string will always result
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- in the same UUID. -}
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genUUIDInNameSpace :: U.UUID -> String -> UUID
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genUUIDInNameSpace namespace = toUUID . U5.generateNamed namespace . s2w8
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{- Namespace used for UUIDs derived from git-remote-gcrypt ids. -}
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gCryptNameSpace :: U.UUID
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gCryptNameSpace = U5.generateNamed U5.namespaceURL $
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s2w8 "http://git-annex.branchable.com/design/gcrypt/"
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{- Get current repository's UUID. -}
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getUUID :: Annex UUID
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getUUID = annexUUID <$> Annex.getGitConfig
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{- Looks up a remote repo's UUID, caching it in .git/config if
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- it's not already. -}
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getRepoUUID :: Git.Repo -> Annex UUID
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getRepoUUID r = do
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c <- toUUID <$> getConfig cachekey ""
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let u = getUncachedUUID r
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if c /= u && u /= NoUUID
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then do
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updatecache u
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return u
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else return c
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where
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updatecache u = do
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g <- gitRepo
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when (g /= r) $ storeUUIDIn cachekey u
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cachekey = remoteAnnexConfig r "uuid"
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removeRepoUUID :: Annex ()
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removeRepoUUID = do
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unsetConfig configkeyUUID
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storeUUID NoUUID
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getUncachedUUID :: Git.Repo -> UUID
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getUncachedUUID = toUUID . Git.Config.get configkeyUUID ""
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-- Does the repo's config have a key for the UUID?
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-- True even when the key has no value.
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isUUIDConfigured :: Git.Repo -> Bool
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isUUIDConfigured = isJust . Git.Config.getMaybe configkeyUUID
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{- Make sure that the repo has an annex.uuid setting. -}
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prepUUID :: Annex ()
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prepUUID = whenM ((==) NoUUID <$> getUUID) $
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storeUUID =<< liftIO genUUID
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storeUUID :: UUID -> Annex ()
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storeUUID = storeUUIDIn configkeyUUID
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storeUUIDIn :: ConfigKey -> UUID -> Annex ()
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storeUUIDIn configfield = setConfig configfield . fromUUID
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{- Only sets the configkey in the Repo; does not change .git/config -}
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setUUID :: Git.Repo -> UUID -> IO Git.Repo
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setUUID r u = do
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let s = encodeBS' $ show configkeyUUID ++ "=" ++ fromUUID u
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Git.Config.store s r
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-- Dummy uuid for the whole web. Do not alter.
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webUUID :: UUID
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webUUID = UUID (fromString "00000000-0000-0000-0000-000000000001")
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-- Dummy uuid for bittorrent. Do not alter.
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bitTorrentUUID :: UUID
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bitTorrentUUID = UUID (fromString "00000000-0000-0000-0000-000000000002")
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