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{- git-annex exports
-
- Copyright 2017-2021 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU AGPL version 3 or higher.
-}
{-# LANGUAGE OverloadedStrings #-}
module Annex.Export where
import Annex
import Annex.CatFile
import Types
import Types.Key
import qualified Git
import qualified Types.Remote as Remote
import Git.Quote
import Messages
import Data.Maybe
import qualified Data.ByteString.Short as S (fromShort, toShort)
-- From a sha pointing to the content of a file to the key
-- to use to export it. When the file is annexed, it's the annexed key.
-- When the file is stored in git, it's a special type of key to indicate
-- that.
exportKey :: Git.Sha -> Annex Key
exportKey sha = mk <$> catKey sha
where
mk (Just k) = k
mk Nothing = gitShaKey sha
-- Encodes a git sha as a key. This is used to represent a non-annexed
-- file that is stored on a special remote, which necessarily needs a
-- key.
--
-- This is not the same as a SHA1 key, because the mapping needs to be
-- bijective, also because git may not always use SHA1, and because git
-- takes a SHA1 of the file size + content, while git-annex SHA1 keys
-- only checksum the content.
gitShaKey :: Git.Sha -> Key
gitShaKey (Git.Ref s) = mkKey $ \kd -> kd
{ keyName = S.toShort s
, keyVariety = OtherKey "GIT"
}
-- Reverse of gitShaKey
keyGitSha :: Key -> Maybe Git.Sha
keyGitSha k
| fromKey keyVariety k == OtherKey "GIT" =
Just (Git.Ref (S.fromShort (fromKey keyName k)))
| otherwise = Nothing
-- Is a key storing a git sha, and not used for an annexed file?
isGitShaKey :: Key -> Bool
isGitShaKey = isJust . keyGitSha
warnExportImportConflict :: Remote -> Annex ()
warnExportImportConflict r = do
isimport <- Remote.isImportSupported r
isexport <- Remote.isExportSupported r
let (ops, resolvcmd) = case (isexport, isimport) of
(False, True) -> ("imported from", "git-annex import")
(True, False) -> ("exported to", "git-annex export")
_ -> ("exported to and/or imported from", "git-annex export")
toplevelWarning True $ UnquotedString $ unwords
[ "Conflict detected. Different trees have been"
, ops, Remote.name r ++ ". Use"
, resolvcmd
, "to resolve this conflict."
]
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