git-annex/Command/Unlock.hs
Joey Hess f1b0a4b404 Use lower case hash directories for storing files on crippled filesystems, same as is already done for bare repositories.
* since this is a crippled filesystem anyway, git-annex doesn't use
  symlinks on it
* so there's no reason to use the mixed case hash directories that we're
  stuck using to avoid breaking everyone's symlinks to the content
* so we can do what is already done for all bare repos, and make non-bare
  repos on crippled filesystems use the all-lower case hash directories
* which are, happily, all 3 letters long, so they cannot conflict with
  mixed case hash directories
* so I was able to 100% fix this and even resuming `git annex add` in the
  test case will recover and it will all just work.
2013-04-04 15:46:33 -04:00

50 lines
1.2 KiB
Haskell

{- git-annex command
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.Unlock where
import Common.Annex
import Command
import Annex.Content
import Utility.CopyFile
def :: [Command]
def =
[ c "unlock" "unlock files for modification"
, c "edit" "same as unlock"
]
where
c n = notDirect . command n paramPaths seek SectionCommon
seek :: [CommandSeek]
seek = [withFilesInGit $ whenAnnexed start]
{- The unlock subcommand replaces the symlink with a copy of the file's
- content. -}
start :: FilePath -> (Key, Backend) -> CommandStart
start file (key, _) = do
showStart "unlock" file
next $ perform file key
perform :: FilePath -> Key -> CommandPerform
perform dest key = do
unlessM (inAnnex key) $ error "content not present"
unlessM (checkDiskSpace Nothing key 0) $ error "cannot unlock"
src <- calcRepo $ gitAnnexLocation key
tmpdest <- fromRepo $ gitAnnexTmpLocation key
liftIO $ createDirectoryIfMissing True (parentDir tmpdest)
showAction "copying"
ifM (liftIO $ copyFileExternal src tmpdest)
( do
liftIO $ do
removeFile dest
moveFile tmpdest dest
thawContent dest
next $ return True
, error "copy failed!"
)