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
import qualified Annex
	
def :: [Command]
def = [notDirect $ command "lock" paramPaths seek SectionCommon
	"undo unlock command"]

seek :: CommandSeek
seek ps = do
	withFilesUnlocked start ps
	withFilesUnlockedToBeCommitted start ps

start :: FilePath -> CommandStart
start file = do
	showStart "lock" file
	unlessM (Annex.getState Annex.force) $
		error "Locking this file would discard any changes you have made to it. Use 'git annex add' to stage your changes. (Or, use --force to override)"
	next $ perform file

perform :: FilePath -> CommandPerform
perform file = do
	Annex.Queue.addCommand "checkout" [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`
lock: Require --force. 2013-12-05 20:05:07 +00:00			`import qualified Annex`
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]`
add section metadata to all commands Not yet used .. mindless train work. 2013-03-24 22:28:21 +00:00			`def = [notDirect $ command "lock" paramPaths seek SectionCommon`
			`"undo unlock command"]`
lock and unlock subcommands 2010-11-09 19:59:49 +00:00
fix inversion of control in CommandSeek (no behavior changes) I've been disliking how the command seek actions were written for some time, with their inversion of control and ugly workarounds. The last straw to fix it was sync --content, which didn't fit the Annex [CommandStart] interface well at all. I have not yet made it take advantage of the changed interface though. The crucial change, and probably why I didn't do it this way from the beginning, is to make each CommandStart action be run with exceptions caught, and if it fails, increment a failure counter in annex state. So I finally remove the very first code I wrote for git-annex, which was before I had exception handling in the Annex monad, and so ran outside that monad, passing state explicitly as it ran each CommandStart action. This was a real slog from 1 to 5 am. Test suite passes. Memory usage is lower than before, sometimes by a couple of megabytes, and remains constant, even when running in a large repo, and even when repeatedly failing and incrementing the error counter. So no accidental laziness space leaks. Wall clock speed is identical, even in large repos. This commit was sponsored by an anonymous bitcoiner. 2014-01-20 08:11:42 +00:00			`seek :: CommandSeek`
			`seek ps = do`
			`withFilesUnlocked start ps`
			`withFilesUnlockedToBeCommitted start ps`
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`
lock: Require --force. 2013-12-05 20:05:07 +00:00			`unlessM (Annex.getState Annex.force) $`
			`error "Locking this file would discard any changes you have made to it. Use 'git annex add' to stage your changes. (Or, use --force to override)"`
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`
extend Git.Queue to be able to queue more than simple git commands While I was in there, I noticed and fixed a bug in the queue size calculations. It was never encountered only because Queue.add was only ever run with 1 file in the list. 2012-06-07 19:19:44 +00:00			`Annex.Queue.addCommand "checkout" [Param "--"] [file]`
refactor some boilerplate 2011-05-15 06:02:46 +00:00			`next $ return True -- no cleanup needed`