git-annex/Command/Lock.hs

{- git-annex command
 -
 - Copyright 2010 Joey Hess <joey@kitenet.net>
 -
 - Licensed under the GNU GPL version 3 or higher.
 -}

module Command.Lock where

import Common.Annex
import Command
import qualified Annex.Queue
	
def :: [Command]
def = [command "lock" paramPaths seek "undo unlock command"]

seek :: [CommandSeek]
seek = [withFilesUnlocked start, withFilesUnlockedToBeCommitted start]

start :: FilePath -> CommandStart
start file = do
	showStart "lock" file
	next $ perform file

perform :: FilePath -> CommandPerform
perform file = do
	liftIO $ removeFile file
	-- Checkout from HEAD to get rid of any changes that might be 
	-- staged in the index, and get back to the previous symlink to
	-- the content.
	Annex.Queue.add "checkout" [Param "HEAD", Param "--"] [file]
	next $ return True -- no cleanup needed
lock and unlock subcommands 2010-11-09 19:59:49 +00:00			`{- git-annex command`
			`-`
			`- Copyright 2010 Joey Hess <joey@kitenet.net>`
			`-`
			`- Licensed under the GNU GPL version 3 or higher.`
			`-}`

			`module Command.Lock where`

rename 2011-10-05 20:02:51 +00:00			`import Common.Annex`
lock and unlock subcommands 2010-11-09 19:59:49 +00:00			`import Command`
rename 2011-10-04 04:40:47 +00:00			`import qualified Annex.Queue`
refactor in preparation for adding a git-annex-shell command 2010-12-30 19:06:26 +00:00
clean up check selection code This new approach allows filtering out checks from the default set that are not appropriate for a command, rather than having to list every check that is appropriate. It also reduces some boilerplate. Haskell does not define Eq for functions, so I had to go a long way around with each check having a unique id. Meh. 2011-10-29 19:19:05 +00:00			`def :: [Command]`
			`def = [command "lock" paramPaths seek "undo unlock command"]`
lock and unlock subcommands 2010-11-09 19:59:49 +00:00
rename some stuff and prepare to break out more into Command/* 2010-12-30 18:19:16 +00:00			`seek :: [CommandSeek]`
Fix locking of files with staged changes. Previously, lock would skip files that had staged changes, but that is counterintuitive, I think. 2011-05-31 18:58:06 +00:00			`seek = [withFilesUnlocked start, withFilesUnlockedToBeCommitted start]`
refactor param seeking 2010-11-11 22:54:52 +00:00
rework git check-attr interface Now gitattributes are looked up, efficiently, in only the places that really need them, using the same approach used for cat-file. The old CheckAttr code seemed very fragile, in the way it streamed files through git check-attr. I actually found that cad8824852aa0623dc41eac02a9e2bae47d88ec4 was still deadlocking with ghc 7.4, at the end of adding a lot of files. This should fix that problem, and avoid future ones. The best part is that this removes withAttrFilesInGit and withNumCopies, which were complicated Seek methods, as well as simplfying the types for several other Seek methods that had a Backend tupled in. 2012-02-14 03:42:44 +00:00			`start :: FilePath -> CommandStart`
			`start file = do`
rework command dispatching for add and pre-commit Both subcommands do two different operations on different sets of files, so allowing a subcommand to perform a list of operations cleans things up. 2010-11-11 21:58:55 +00:00			`showStart "lock" file`
refactor some boilerplate 2011-05-15 06:02:46 +00:00			`next $ perform file`
lock and unlock subcommands 2010-11-09 19:59:49 +00:00
rename some stuff and prepare to break out more into Command/* 2010-12-30 18:19:16 +00:00			`perform :: FilePath -> CommandPerform`
lock and unlock subcommands 2010-11-09 19:59:49 +00:00			`perform file = do`
			`liftIO $ removeFile file`
Massively sped up `git annex lock` by avoiding use of the uber-slow `git reset`, and only running `git checkout` once, even when many files are being locked. 2011-05-31 18:50:41 +00:00			`-- Checkout from HEAD to get rid of any changes that might be`
			`-- staged in the index, and get back to the previous symlink to`
			`-- the content.`
rename 2011-10-04 04:40:47 +00:00			`Annex.Queue.add "checkout" [Param "HEAD", Param "--"] [file]`
refactor some boilerplate 2011-05-15 06:02:46 +00:00			`next $ return True -- no cleanup needed`