cd544e548b
giveup changed to filter out control characters. (It is too low level to make it use StringContainingQuotedPath.) error still does not, but it should only be used for internal errors, where the message is not attacker-controlled. Changed a lot of existing error to giveup when it is not strictly an internal error. Of course, other exceptions can still be thrown, either by code in git-annex, or a library, that include some attacker-controlled value. This does not guard against those. Sponsored-by: Noam Kremen on Patreon
84 lines
2.4 KiB
Haskell
84 lines
2.4 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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{-# LANGUAGE OverloadedStrings #-}
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module Command.Undo where
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import Command
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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 Git.Filename
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import qualified Annex
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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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import qualified Utility.RawFilePath as R
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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 (map toRawFilePath ps)
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unless (null fs) $ do
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qp <- coreQuotePath <$> Annex.getGitConfig
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giveup $ decodeBS $ quote qp $
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"Cannot undo changes to files that are not checked into git: "
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<> quotedPaths 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" ai si $
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perform p
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where
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ai = ActionItemOther (Just (QuotedPath (toRawFilePath p)))
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si = SeekInput [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 $ toRawFilePath 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 `elem` nullShas) diff'
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let mkrel di = liftIO $ relPathCwdToFile $
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fromTopFilePath (file di) g
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forM_ removals $ \di -> do
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f <- mkrel di
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liftIO $ removeWhenExistsWith R.removeLink f
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forM_ adds $ \di -> do
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f <- fromRawFilePath <$> 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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