689d1fcc92A few remain, as needed for upgrades, and for accessing objects from remotes that are direct mode repos that have not been converted yet.
74 lines
2.1 KiB
Haskell
74 lines
2.1 KiB
Haskell
{- git-annex command
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-
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- Copyright 2014 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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module Command.Undo where
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import Command
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import Config
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import Annex.CatFile
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import Git.DiffTree
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import Git.FilePath
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import Git.UpdateIndex
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import Git.Sha
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import qualified Git.LsFiles as LsFiles
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import qualified Git.Command as Git
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import qualified Git.Branch
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import qualified Command.Sync
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cmd :: Command
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cmd = notBareRepo $
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command "undo" SectionCommon
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"undo last change to a file or directory"
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paramPaths (withParams seek)
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seek :: CmdParams -> CommandSeek
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seek ps = do
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-- Safety first; avoid any undo that would touch files that are not
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-- in the index.
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(fs, cleanup) <- inRepo $ LsFiles.notInRepo False ps
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unless (null fs) $
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giveup $ "Cannot undo changes to files that are not checked into git: " ++ unwords fs
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void $ liftIO $ cleanup
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-- Committing staged changes before undo allows later
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-- undoing the undo. It would be nicer to only commit staged
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-- changes to the specified files, rather than all staged changes.
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void $ Command.Sync.commitStaged Git.Branch.ManualCommit
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"commit before undo"
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withStrings (commandAction . start) ps
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start :: FilePath -> CommandStart
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start p = starting "undo" (ActionItemOther (Just p)) $
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perform p
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perform :: FilePath -> CommandPerform
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perform p = do
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g <- gitRepo
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-- Get the reversed diff that needs to be applied to undo.
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(diff, cleanup) <- inRepo $
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diffLog [Param "-R", Param "--", Param p]
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top <- inRepo $ toTopFilePath p
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let diff' = filter (`isDiffOf` top) diff
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liftIO $ streamUpdateIndex g (map stageDiffTreeItem diff')
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-- Take two passes through the diff, first doing any removals,
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-- and then any adds. This order is necessary to handle eg, removing
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-- a directory and replacing it with a file.
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let (removals, adds) = partition (\di -> dstsha di == nullSha) diff'
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let mkrel di = liftIO $ relPathCwdToFile $ fromTopFilePath (file di) g
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forM_ removals $ \di -> do
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f <- mkrel di
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liftIO $ nukeFile f
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forM_ adds $ \di -> do
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f <- mkrel di
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inRepo $ Git.run [Param "checkout", Param "--", File f]
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next $ liftIO cleanup
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