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|
{- git-annex command
-
- Copyright 2010-2016 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.Unlock where
import Command
import Annex.Content
import Annex.Perms
import Annex.CatFile
import Annex.Version
import Annex.Link
import Annex.ReplaceFile
import Utility.CopyFile
import Utility.FileMode
import Git.FilePath
import qualified Database.Keys
cmd :: Command
cmd = mkcmd "unlock" "unlock files for modification"
editcmd :: Command
editcmd = mkcmd "edit" "same as unlock"
mkcmd :: String -> String -> Command
mkcmd n d = notDirect $ withGlobalOptions annexedMatchingOptions $
command n SectionCommon d paramPaths (withParams seek)
seek :: CmdParams -> CommandSeek
seek = withFilesInGit $ whenAnnexed start
{- Before v6, the unlock subcommand replaces the symlink with a copy of
- the file's content. In v6 and above, it converts the file from a symlink
- to a pointer. -}
start :: FilePath -> Key -> CommandStart
start file key = ifM (isJust <$> isAnnexLink file)
( do
showStart "unlock" file
ifM versionSupportsUnlockedPointers
( next $ performNew file key
, startOld file key
)
, stop
)
performNew :: FilePath -> Key -> CommandPerform
performNew dest key = do
destmode <- liftIO $ catchMaybeIO $ fileMode <$> getFileStatus dest
replaceFile dest $ \tmp ->
ifM (inAnnex key)
( do
r <- linkFromAnnex key tmp destmode
case r of
LinkAnnexOk -> return ()
LinkAnnexNoop -> return ()
LinkAnnexFailed -> error "unlock failed"
, liftIO $ writePointerFile tmp key destmode
)
next $ cleanupNew dest key destmode
cleanupNew :: FilePath -> Key -> Maybe FileMode -> CommandCleanup
cleanupNew dest key destmode = do
stagePointerFile dest destmode =<< hashPointerFile key
Database.Keys.addAssociatedFile key =<< inRepo (toTopFilePath dest)
return True
startOld :: FilePath -> Key -> CommandStart
startOld file key =
ifM (inAnnex key)
( ifM (isJust <$> catKeyFileHEAD file)
( next $ performOld file key
, do
warning "this has not yet been committed to git; cannot unlock it"
next $ next $ return False
)
, do
warning "content not present; cannot unlock"
next $ next $ return False
)
performOld :: FilePath -> Key -> CommandPerform
performOld dest key = ifM (checkDiskSpace Nothing key 0 True)
( do
src <- calcRepo $ gitAnnexLocation key
tmpdest <- fromRepo $ gitAnnexTmpObjectLocation key
liftIO $ createDirectoryIfMissing True (parentDir tmpdest)
showAction "copying"
ifM (liftIO $ copyFileExternal CopyAllMetaData src tmpdest)
( do
liftIO $ do
removeFile dest
moveFile tmpdest dest
thawContent dest
next $ return True
, do
warning "copy failed!"
next $ return False
)
, do
warning "not enough disk space to copy file"
next $ return False
)
|
