120 lines
3.6 KiB
Haskell
120 lines
3.6 KiB
Haskell
{- git-annex command
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-
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- Copyright 2010-2013 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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{-# LANGUAGE CPP #-}
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module Command.Unannex where
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import Common.Annex
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import Command
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import Config
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import qualified Annex
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import Annex.Content
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import Annex.Content.Direct
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import qualified Git.Command
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import qualified Git.Branch
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import qualified Git.Ref
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import qualified Git.DiffTree as DiffTree
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import Utility.CopyFile
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import Command.PreCommit (lockPreCommitHook)
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cmd :: [Command]
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cmd = [command "unannex" paramPaths seek SectionUtility
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"undo accidential add command"]
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seek :: CommandSeek
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seek = wrapUnannex . (withFilesInGit $ whenAnnexed start)
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wrapUnannex :: Annex a -> Annex a
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wrapUnannex a = ifM isDirect
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( a
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{- Run with the pre-commit hook disabled, to avoid confusing
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- behavior if an unannexed file is added back to git as
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- a normal, non-annexed file and then committed.
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- Otherwise, the pre-commit hook would think that the file
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- has been unlocked and needs to be re-annexed.
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-
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- At the end, make a commit removing the unannexed files.
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-}
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, ifM cleanindex
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( lockPreCommitHook $ commit `after` a
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, error "Cannot proceed with uncommitted changes staged in the index. Recommend you: git commit"
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)
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)
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where
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commit = inRepo $ Git.Branch.commitCommand Git.Branch.ManualCommit
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[ Param "-q"
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, Param "--allow-empty"
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, Param "--no-verify"
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, Param "-m", Param "content removed from git annex"
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]
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cleanindex = do
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(diff, cleanup) <- inRepo $ DiffTree.diffIndex Git.Ref.headRef
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if null diff
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then void (liftIO cleanup) >> return True
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else void (liftIO cleanup) >> return False
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start :: FilePath -> Key -> CommandStart
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start file key = stopUnless (inAnnex key) $ do
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showStart "unannex" file
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next $ ifM isDirect
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( performDirect file key
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, performIndirect file key)
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performIndirect :: FilePath -> Key -> CommandPerform
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performIndirect file key = do
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liftIO $ removeFile file
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inRepo $ Git.Command.run [Params "rm --cached --force --quiet --", File file]
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next $ cleanupIndirect file key
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cleanupIndirect :: FilePath -> Key -> CommandCleanup
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cleanupIndirect file key = do
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src <- calcRepo $ gitAnnexLocation key
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ifM (Annex.getState Annex.fast)
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( do
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-- Only make a hard link if the annexed file does not
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-- already have other hard links pointing at it.
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-- This avoids unannexing (and uninit) ending up
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-- hard linking files together, which would be
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-- surprising.
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s <- liftIO $ getFileStatus src
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if linkCount s > 1
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then copyfrom src
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else hardlinkfrom src
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, copyfrom src
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)
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where
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copyfrom src =
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thawContent file `after` liftIO (copyFileExternal CopyAllMetaData src file)
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hardlinkfrom src =
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#ifndef mingw32_HOST_OS
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-- creating a hard link could fall; fall back to copying
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ifM (liftIO $ catchBoolIO $ createLink src file >> return True)
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( return True
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, copyfrom src
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)
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#else
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copyfrom src
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#endif
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performDirect :: FilePath -> Key -> CommandPerform
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performDirect file key = do
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-- --force is needed when the file is not committed
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inRepo $ Git.Command.run [Params "rm --cached --force --quiet --", File file]
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next $ cleanupDirect file key
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{- The direct mode file is not touched during unannex, so the content
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- is already where it needs to be, so this does not need to do anything
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- except remove it from the associated file map (which also updates
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- the location log if this was the last copy), and, if this was the last
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- associated file, remove the inode cache. -}
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cleanupDirect :: FilePath -> Key -> CommandCleanup
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cleanupDirect file key = do
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fs <- removeAssociatedFile key file
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when (null fs) $
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removeInodeCache key
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return True
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