{- git-annex exports
 -
 - Copyright 2017 Joey Hess <id@joeyh.name>
 -
 - Licensed under the GNU AGPL version 3 or higher.
 -}

module Annex.Export where

import Annex
import Annex.CatFile
import Types
import Types.Key
import qualified Git
import qualified Types.Remote as Remote
import Messages

import Control.Applicative
import Data.Maybe
import Prelude

-- An export includes both annexed files and files stored in git.
-- For the latter, a SHA1 key is synthesized.
data ExportKey = AnnexKey Key | GitKey Key
	deriving (Show, Eq, Ord)

asKey :: ExportKey -> Key
asKey (AnnexKey k) = k
asKey (GitKey k) = k

exportKey :: Git.Sha -> Annex ExportKey
exportKey sha = mk <$> catKey sha
  where
	mk (Just k) = AnnexKey k
	mk Nothing = GitKey $ mkKey $ \k -> k
		{ keyName = Git.fromRef' sha
		, keyVariety = SHA1Key (HasExt False)
		, keySize = Nothing
		, keyMtime = Nothing
		, keyChunkSize = Nothing
		, keyChunkNum = Nothing
		}

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 $ unwords
		[ "Conflict detected. Different trees have been"
		, ops, Remote.name r ++ ". Use"
		, resolvcmd
		, "to resolve this conflict."
		]