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git-annex/Annex/Link.hs

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fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
{- git-annex links to content
-
- On file systems that support them, symlinks are used.
-
- On other filesystems, git instead stores the symlink target in a regular
- file.
-
refactor and improve pointer file handling code
2015-12-09 18:25:33 +00:00
- Pointer files are used instead of symlinks for unlocked files.
-
fold parseLinkTarget into parseLinkTargetOrPointer Only one place remained that differentiated between them. It is the case that a symlink target that happens to contain a newline somehow will be treated as a link to a key truncated at the newline. This is super unlikely to happen, and since a key cannot actually contain a newline, it's as good a behavior as any. Anyway, this commit does not change the behavior there, although arguably it should be changed. Note that getAnnexLinkTarget does prevent a symlink target containing a newline. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 16:24:09 +00:00
- Copyright 2013-2022 Joey Hess <id@joeyh.name>
fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
-
update licenses from GPL to AGPL This does not change the overall license of the git-annex program, which was already AGPL due to a number of sources files being AGPL already. Legally speaking, I'm adding a new license under which these files are now available; I already released their current contents under the GPL license. Now they're dual licensed GPL and AGPL. However, I intend for all my future changes to these files to only be released under the AGPL license, and I won't be tracking the dual licensing status, so I'm simply changing the license statement to say it's AGPL. (In some cases, others wrote parts of the code of a file and released it under the GPL; but in all cases I have contributed a significant portion of the code in each file and it's that code that is getting the AGPL license; the GPL license of other contributors allows combining with AGPL code.)
2019-03-13 19:48:14 +00:00
- Licensed under the GNU AGPL version 3 or higher.
fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
-}
dynamically disable filter-process in restagePointerFile when it would be slower Based on my earlier benchmark, I have a rough cost model for how expensive it is for git-annex smudge to be run on a file, vs how expensive it is for a gigabyte of a file's content to be read and piped through to filter-process. So, using that cost model, it can decide if using filter-process will be more or less expensive than running the smudge filter on the files to be restaged. It turned out to be *really* annoying to temporarily disable filter-process. I did find a way, but urk, this is horrible. Notice that, if it's interrupted with it disabled, it will remain disabled until the next time restagePointerFile runs. Which could be some time later. If the user runs `git add` or `git checkout` on a lot of small files before that, they will see slower than expected performance. (This commit also deletes where I wrote down the benchmark results earlier.) Sponsored-by: Noam Kremen on Patreon
2021-11-08 19:55:27 +00:00
{-# LANGUAGE CPP, BangPatterns, OverloadedStrings #-}
Windows: Fix v6 unlocked files to actually work. Pointer files were not being treated as annex content, so "git annex get" didn't replace them with the object.
2016-02-15 20:12:18 +00:00
fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
module Annex.Link where
remove 163 lines of code without changing anything except imports
2016-01-20 20:36:33 +00:00
import Annex.Common
fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
import qualified Annex
import qualified Annex.Queue
avoid update-index race This commit was supported by the NSF-funded DataLad project.
2018-08-17 20:03:40 +00:00
import qualified Git.Queue
import qualified Git.UpdateIndex
import qualified Git.Index
import qualified Git.LockFile
import qualified Git.Env
import qualified Git
fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
import Git.Types
deal with git using / internally, even on DOS
2013-05-12 22:18:48 +00:00
import Git.FilePath
avoid git warning about CRLF in restagePointerFile Saw it on Windows, could probably also happen on linux with some configuration. Since this is a pointer file, the warning does not apply.
2019-02-18 22:06:35 +00:00
import Git.Config
Sped up git-annex add in direct mode and v6 by using git hash-object --batch. Speeds up hashSymlink and hashPointerFile.
2016-03-14 19:58:46 +00:00
import Annex.HashObject
avoid update-index race This commit was supported by the NSF-funded DataLad project.
2018-08-17 20:03:40 +00:00
import Annex.InodeSentinal
refactor out Annex.PidLock
2020-08-26 16:20:56 +00:00
import Annex.PidLock
Preserve execute bits of unlocked files in v6 mode. When annex.thin is set, adding an object will add the execute bits to the work tree file, and this does mean that the annex object file ends up executable. This doesn't add any complexity that wasn't already present, because git annex add of an executable file has always ingested it so that the annex object ends up executable. But, since an annex object file can be executable or not, when populating an unlocked file from one, the executable bit is always added or removed to match the mode of the pointer file.
2016-04-14 18:30:15 +00:00
import Utility.FileMode
narrow the race where a file gets modified before update-index Check just before running update-index if the worktree file's content is still the same, don't update it when it's been modified. This narrows the race window a lot, from possibly minutes or hours, to seconds or less. (Use replaceFile so that the worktree update happens atomically, allowing the InodeCache of the new worktree file to itself be gathered w/o any other race.) This doesn't eliminate the race; it can still occur in the window before update-index runs. When annex.queue is large, a lot of files will be statted by the checks, and so the window may still be large enough to be a problem. When only a few files are being processed, the window is as small as it is in the race where a modification gets overwritten by git-annex when it updates the worktree. Or maybe as small as whatever race git checkout/pull/merge may have when the worktree gets modified during it. Still, I've kept a todo about this race. This commit was supported by the NSF-funded DataLad project.
2018-08-16 19:15:20 +00:00
import Utility.InodeCache
avoid update-index race This commit was supported by the NSF-funded DataLad project.
2018-08-17 20:03:40 +00:00
import Utility.Tmp.Dir
import Utility.CopyFile
dynamically disable filter-process in restagePointerFile when it would be slower Based on my earlier benchmark, I have a rough cost model for how expensive it is for git-annex smudge to be run on a file, vs how expensive it is for a gigabyte of a file's content to be read and piped through to filter-process. So, using that cost model, it can decide if using filter-process will be more or less expensive than running the smudge filter on the files to be restaged. It turned out to be *really* annoying to temporarily disable filter-process. I did find a way, but urk, this is horrible. Notice that, if it's interrupted with it disabled, it will remain disabled until the next time restagePointerFile runs. Which could be some time later. If the user runs `git add` or `git checkout` on a lot of small files before that, they will see slower than expected performance. (This commit also deletes where I wrote down the benchmark results earlier.) Sponsored-by: Noam Kremen on Patreon
2021-11-08 19:55:27 +00:00
import Utility.Tuple
adjust: Fix some bad behavior when unlocked files use URL keys. This avoids the smudge --clean filter failing on the URL keys. git checkout runs the post-checkout hook, which runs smudge --update. That populates all the pointer files, but it neglected to store their inode caches in the keys db. With that done, and the keys db flushed before smudge --clean gets run (by restagePointerFile), the isUnmodifiedCheap check can tell the file is not modified, so will not try to re-ingest it, which does not work with URL keys because they do not support genKey. It also seems possible that the isUnmodifiedCheap was also failing for non-URL keys, which would cause them to be re-ingested, leading to a lot of extra work. I have not verified that, but don't see why it wouldn't have happened. So this probably also speeds up checking out adjusted branches. This commit was sponsored by Boyd Stephen Smith Jr. on Patreon.
2021-01-25 21:25:42 +00:00
import qualified Database.Keys.Handle
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
import qualified Utility.RawFilePath as R
refactor and improve pointer file handling code
2015-12-09 18:25:33 +00:00
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
import qualified Data.ByteString as S
import qualified Data.ByteString.Char8 as S8
refactor and improve pointer file handling code
2015-12-09 18:25:33 +00:00
import qualified Data.ByteString.Lazy as L
use filepath-bytestring for annex object manipulations git-annex find is now RawFilePath end to end, no string conversions. So is git-annex get when it does not need to get anything. So this is a major milestone on optimisation. Benchmarks indicate around 30% speedup in both commands. Probably many other performance improvements. All or nearly all places where a file is statted use RawFilePath now.
2019-12-11 18:12:22 +00:00
import qualified System.FilePath.ByteString as P
fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
more RawFilePath conversion removeFile changed to removeLink, because AFAICS it should be fine to remove non-file things here. In particular, it's fine to remove a symlink, since we're about to write a symlink. (removeLink does not remove directories, so file, symlink, and unix socket are the only possibilities.)
2020-10-30 17:07:41 +00:00
type LinkTarget = S.ByteString
types
2013-02-18 06:35:38 +00:00
fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
{- Checks if a file is a link to a key. -}
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
isAnnexLink :: RawFilePath -> Annex (Maybe Key)
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
isAnnexLink file = maybe Nothing parseLinkTargetOrPointer <$> getAnnexLinkTarget file
fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
{- Gets the link target of a symlink.
-
always try to read symlink; only fall back to looking inside file On Windows with Cygwin, checking out a git-annex repo will create symlinks on disk, so we need to always try to read the symlink, even when core.symlinks says they're not supported.
2013-05-14 18:18:47 +00:00
- On a filesystem that does not support symlinks, fall back to getting the
avoid false positives when detecting core.symlinks=false symlink standin files If the file is > 8192 bytes, it's certianly not a symlink file. And if it contains nuls or newlines or whitespace, it's certianly not a link to annexed content. But it might be a tarball containing a git-annex repo.
2013-07-20 23:28:02 +00:00
- link target by looking inside the file.
fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
-
- Returns Nothing if the file is not a symlink, or not a link to annex
- content.
-}
more RawFilePath conversion removeFile changed to removeLink, because AFAICS it should be fine to remove non-file things here. In particular, it's fine to remove a symlink, since we're about to write a symlink. (removeLink does not remove directories, so file, symlink, and unix socket are the only possibilities.)
2020-10-30 17:07:41 +00:00
getAnnexLinkTarget :: RawFilePath -> Annex (Maybe LinkTarget)
diffdriver: New git-annex command, to make git external diff drivers work with annexed files. Closes https://github.com/datalad/datalad/issues/18
2014-11-24 20:14:01 +00:00
getAnnexLinkTarget f = getAnnexLinkTarget' f
=<< (coreSymlinks <$> Annex.getGitConfig)
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
{- Pass False to force looking inside file, for when git checks out
- symlinks as plain files. -}
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
getAnnexLinkTarget' :: RawFilePath -> Bool -> Annex (Maybe S.ByteString)
diffdriver: New git-annex command, to make git external diff drivers work with annexed files. Closes https://github.com/datalad/datalad/issues/18
2014-11-24 20:14:01 +00:00
getAnnexLinkTarget' file coresymlinks = if coresymlinks
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
then check probesymlink $
Fix inverted logic in last release's fix for data loss bug, that caused git-annex sync on FAT or other crippled filesystems to add symlink standin files to the annex.
2013-07-30 20:07:47 +00:00
return Nothing
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
else check probesymlink $
avoid false positives when detecting core.symlinks=false symlink standin files If the file is > 8192 bytes, it's certianly not a symlink file. And if it contains nuls or newlines or whitespace, it's certianly not a link to annexed content. But it might be a tarball containing a git-annex repo.
2013-07-20 23:28:02 +00:00
check probefilecontent $
always try to read symlink; only fall back to looking inside file On Windows with Cygwin, checking out a git-annex repo will create symlinks on disk, so we need to always try to read the symlink, even when core.symlinks says they're not supported.
2013-05-14 18:18:47 +00:00
return Nothing
set fileSystemEncoding when reading files that might be binary
2013-02-18 21:19:37 +00:00
where
more lambda-case conversion
2017-12-05 19:00:50 +00:00
check getlinktarget fallback =
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
liftIO (catchMaybeIO getlinktarget) >>= \case
always try to read symlink; only fall back to looking inside file On Windows with Cygwin, checking out a git-annex repo will create symlinks on disk, so we need to always try to read the symlink, even when core.symlinks says they're not supported.
2013-05-14 18:18:47 +00:00
Just l
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
| isLinkToAnnex l -> return (Just l)
always try to read symlink; only fall back to looking inside file On Windows with Cygwin, checking out a git-annex repo will create symlinks on disk, so we need to always try to read the symlink, even when core.symlinks says they're not supported.
2013-05-14 18:18:47 +00:00
| otherwise -> return Nothing
Nothing -> fallback
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
probesymlink = R.readSymbolicLink file
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
probefilecontent = withFile (fromRawFilePath file) ReadMode $ \h -> do
read a consistent amount from pointer file A few places were reading the max symlink size of a pointer file, then passing tp parseLinkTargetOrPointer. Which is fine currently, but to support pointer files with lines of data after the pointer, enough has to be read that parseLinkTargetOrPointer can be assured of seeing enough of that data to know if it's correctly formatted. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 16:38:35 +00:00
s <- S.hGet h maxSymlinkSz
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
-- If we got the full amount, the file is too large
-- to be a symlink target.
read a consistent amount from pointer file A few places were reading the max symlink size of a pointer file, then passing tp parseLinkTargetOrPointer. Which is fine currently, but to support pointer files with lines of data after the pointer, enough has to be read that parseLinkTargetOrPointer can be assured of seeing enough of that data to know if it's correctly formatted. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 16:38:35 +00:00
return $ if S.length s == maxSymlinkSz
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
then mempty
avoid using openFile when withFile can be used Potentially fixes some FD leak if an action on an opened file handle fails for some reason. There have been some hard to reproduce reports of git-annex leaking FDs, and this may solve them.
2014-02-03 14:16:05 +00:00
else
avoid false positives when detecting core.symlinks=false symlink standin files If the file is > 8192 bytes, it's certianly not a symlink file. And if it contains nuls or newlines or whitespace, it's certianly not a link to annexed content. But it might be a tarball containing a git-annex repo.
2013-07-20 23:28:02 +00:00
-- If there are any NUL or newline
-- characters, or whitespace, we
dynamically disable filter-process in restagePointerFile when it would be slower Based on my earlier benchmark, I have a rough cost model for how expensive it is for git-annex smudge to be run on a file, vs how expensive it is for a gigabyte of a file's content to be read and piped through to filter-process. So, using that cost model, it can decide if using filter-process will be more or less expensive than running the smudge filter on the files to be restaged. It turned out to be *really* annoying to temporarily disable filter-process. I did find a way, but urk, this is horrible. Notice that, if it's interrupted with it disabled, it will remain disabled until the next time restagePointerFile runs. Which could be some time later. If the user runs `git add` or `git checkout` on a lot of small files before that, they will see slower than expected performance. (This commit also deletes where I wrote down the benchmark results earlier.) Sponsored-by: Noam Kremen on Patreon
2021-11-08 19:55:27 +00:00
-- certainly don't have a symlink to a
avoid false positives when detecting core.symlinks=false symlink standin files If the file is > 8192 bytes, it's certianly not a symlink file. And if it contains nuls or newlines or whitespace, it's certianly not a link to annexed content. But it might be a tarball containing a git-annex repo.
2013-07-20 23:28:02 +00:00
-- git-annex key.
dynamically disable filter-process in restagePointerFile when it would be slower Based on my earlier benchmark, I have a rough cost model for how expensive it is for git-annex smudge to be run on a file, vs how expensive it is for a gigabyte of a file's content to be read and piped through to filter-process. So, using that cost model, it can decide if using filter-process will be more or less expensive than running the smudge filter on the files to be restaged. It turned out to be *really* annoying to temporarily disable filter-process. I did find a way, but urk, this is horrible. Notice that, if it's interrupted with it disabled, it will remain disabled until the next time restagePointerFile runs. Which could be some time later. If the user runs `git add` or `git checkout` on a lot of small files before that, they will see slower than expected performance. (This commit also deletes where I wrote down the benchmark results earlier.) Sponsored-by: Noam Kremen on Patreon
2021-11-08 19:55:27 +00:00
if any (`S8.elem` s) ("\0\n\r \t" :: [Char])
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
then mempty
hlint test suite still passes
2013-09-25 07:09:06 +00:00
else s
fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
makeAnnexLink :: LinkTarget -> RawFilePath -> Annex ()
Fix bug in automatic merge conflict resolution When one side is an annexed symlink, and the other side is a non-annexed symlink. In this case, git-merge does not replace the annexed symlink in the work tree with the non-annexed symlink, which is different from it's handling of conflicts between annexed symlinks and regular files or directories. So, while git-annex generated the correct merge commit, the work tree didn't get updated to reflect it. See comments on bug for additional analysis. Did not add this to the test suite yet; just unloaded a truckload of firewood and am feeling lazy. This commit was sponsored by Adam Spiers.
2014-07-08 17:54:42 +00:00
makeAnnexLink = makeGitLink
fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
{- Creates a link on disk.
-
- On a filesystem that does not support symlinks, writes the link target
- to a file. Note that git will only treat the file as a symlink if
- it's staged as such, so use addAnnexLink when adding a new file or
- modified link to git.
-}
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
makeGitLink :: LinkTarget -> RawFilePath -> Annex ()
Fix bug in automatic merge conflict resolution When one side is an annexed symlink, and the other side is a non-annexed symlink. In this case, git-merge does not replace the annexed symlink in the work tree with the non-annexed symlink, which is different from it's handling of conflicts between annexed symlinks and regular files or directories. So, while git-annex generated the correct merge commit, the work tree didn't get updated to reflect it. See comments on bug for additional analysis. Did not add this to the test suite yet; just unloaded a truckload of firewood and am feeling lazy. This commit was sponsored by Adam Spiers.
2014-07-08 17:54:42 +00:00
makeGitLink linktarget file = ifM (coreSymlinks <$> Annex.getGitConfig)
Update working tree files fully atomically This avoids commit churn by the assistant when eg, replacing a file with a symlink. But, just as importantly, it prevents the working tree being left with a deleted file if git-annex, or perhaps the whole system, crashes at the wrong time. (It also probably avoids confusing displays in file managers.)
2013-04-02 17:13:42 +00:00
( liftIO $ do
more RawFilePath conversion removeFile changed to removeLink, because AFAICS it should be fine to remove non-file things here. In particular, it's fine to remove a symlink, since we're about to write a symlink. (removeLink does not remove directories, so file, symlink, and unix socket are the only possibilities.)
2020-10-30 17:07:41 +00:00
void $ tryIO $ R.removeLink file
R.createSymbolicLink linktarget file
, liftIO $ S.writeFile (fromRawFilePath file) linktarget
fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
)
{- Creates a link on disk, and additionally stages it in git. -}
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
addAnnexLink :: LinkTarget -> RawFilePath -> Annex ()
fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
addAnnexLink linktarget file = do
makeAnnexLink linktarget file
stageSymlink file =<< hashSymlink linktarget
{- Injects a symlink target into git, returning its Sha. -}
types
2013-02-18 06:35:38 +00:00
hashSymlink :: LinkTarget -> Annex Sha
more RawFilePath conversion removeFile changed to removeLink, because AFAICS it should be fine to remove non-file things here. In particular, it's fine to remove a symlink, since we're about to write a symlink. (removeLink does not remove directories, so file, symlink, and unix socket are the only possibilities.)
2020-10-30 17:07:41 +00:00
hashSymlink = hashBlob . toInternalGitPath
add git annex view command (And a vpop command, which is still a bit buggy.) Still need to do vadd and vrm, though this also adds their documentation. Currently not very happy with the view log data serialization. I had to lose the TDFA regexps temporarily, so I can have Read/Show instances of View. I expect the view log format will change in some incompatable way later, probably adding last known refs for the parent branch to View or something like that. Anyway, it basically works, although it's a bit slow looking up the metadata. The actual git branch construction is about as fast as it can be using the current git plumbing. This commit was sponsored by Peter Hogg.
2014-02-18 21:38:23 +00:00
always format pointer file with a trailing newline Before the smudge filter added a trailing newline, but other things that wrote formatPointer to a file did not. also some new pointer staging code to use later
2015-12-10 20:06:58 +00:00
{- Stages a symlink to an annexed object, using a Sha of its target. -}
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
stageSymlink :: RawFilePath -> Sha -> Annex ()
fully support core.symlinks=false in all relevant symlink handling code Refactored annex link code into nice clean new library. Audited and dealt with calls to createSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ createSymbolicLink linktarget file only when core.symlinks=true Assistant/WebApp/Configurators/Local.hs: createSymbolicLink link link test if symlinks can be made Command/Fix.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/FromKey.hs: liftIO $ createSymbolicLink link file command only works in indirect mode Command/Indirect.hs: liftIO $ createSymbolicLink l f refuses to run if core.symlinks=false Init.hs: createSymbolicLink f f2 test if symlinks can be made Remote/Directory.hs: go [file] = catchBoolIO $ createSymbolicLink file f >> return True fast key linking; catches failure to make symlink and falls back to copy Remote/Git.hs: liftIO $ catchBoolIO $ createSymbolicLink loc file >> return True ditto Upgrade/V1.hs: liftIO $ createSymbolicLink link f v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to readSymbolicLink. Remaining calls are all safe, because: Annex/Link.hs: ( liftIO $ catchMaybeIO $ readSymbolicLink file only when core.symlinks=true Assistant/Threads/Watcher.hs: ifM ((==) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) code that fixes real symlinks when inotify sees them It's ok to not fix psdueo-symlinks. Assistant/Threads/Watcher.hs: mlink <- liftIO (catchMaybeIO $ readSymbolicLink file) ditto Command/Fix.hs: stopUnless ((/=) (Just link) <$> liftIO (catchMaybeIO $ readSymbolicLink file)) $ do command only works in indirect mode Upgrade/V1.hs: getsymlink = takeFileName <$> readSymbolicLink file v1 repos could not be on a filesystem w/o symlinks Audited and dealt with calls to isSymbolicLink. (Typically used with getSymbolicLinkStatus, but that is just used because getFileStatus is not as robust; it also works on pseudolinks.) Remaining calls are all safe, because: Assistant/Threads/SanityChecker.hs: | isSymbolicLink s -> addsymlink file ms only handles staging of symlinks that were somehow not staged (might need to be updated to support pseudolinks, but this is only a belt-and-suspenders check anyway, and I've never seen the code run) Command/Add.hs: if isSymbolicLink s || not (isRegularFile s) avoids adding symlinks to the annex, so not relevant Command/Indirect.hs: | isSymbolicLink s -> void $ flip whenAnnexed f $ only allowed on systems that support symlinks Command/Indirect.hs: whenM (liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f) $ do ditto Seek.hs:notSymlink f = liftIO $ not . isSymbolicLink <$> getSymbolicLinkStatus f used to find unlocked files, only relevant in indirect mode Utility/FSEvents.hs: | Files.isSymbolicLink s = runhook addSymlinkHook $ Just s Utility/FSEvents.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: | Files.isSymbolicLink s -> Utility/INotify.hs: checkfiletype Files.isSymbolicLink addSymlinkHook f Utility/Kqueue.hs: | Files.isSymbolicLink s = callhook addSymlinkHook (Just s) change all above are lower-level, not relevant Audited and dealt with calls to isSymLink. Remaining calls are all safe, because: Annex/Direct.hs: | isSymLink (getmode item) = This is looking at git diff-tree objects, not files on disk Command/Unused.hs: | isSymLink (LsTree.mode l) = do This is looking at git ls-tree, not file on disk Utility/FileMode.hs:isSymLink :: FileMode -> Bool Utility/FileMode.hs:isSymLink = checkMode symbolicLinkMode low-level Done!!
2013-02-17 19:05:55 +00:00
stageSymlink file sha =
Annex.Queue.addUpdateIndex =<<
more RawFilePath conversion 451/645
2020-10-30 19:55:59 +00:00
inRepo (Git.UpdateIndex.stageSymlink file sha)
refactor and improve pointer file handling code
2015-12-09 18:25:33 +00:00
always format pointer file with a trailing newline Before the smudge filter added a trailing newline, but other things that wrote formatPointer to a file did not. also some new pointer staging code to use later
2015-12-10 20:06:58 +00:00
{- Injects a pointer file content into git, returning its Sha. -}
hashPointerFile :: Key -> Annex Sha
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
hashPointerFile key = hashBlob $ formatPointer key
always format pointer file with a trailing newline Before the smudge filter added a trailing newline, but other things that wrote formatPointer to a file did not. also some new pointer staging code to use later
2015-12-10 20:06:58 +00:00
{- Stages a pointer file, using a Sha of its content -}
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
stagePointerFile :: RawFilePath -> Maybe FileMode -> Sha -> Annex ()
Preserve execute bits of unlocked files in v6 mode. When annex.thin is set, adding an object will add the execute bits to the work tree file, and this does mean that the annex object file ends up executable. This doesn't add any complexity that wasn't already present, because git annex add of an executable file has always ingested it so that the annex object ends up executable. But, since an annex object file can be executable or not, when populating an unlocked file from one, the executable bit is always added or removed to match the mode of the pointer file.
2016-04-14 18:30:15 +00:00
stagePointerFile file mode sha =
always format pointer file with a trailing newline Before the smudge filter added a trailing newline, but other things that wrote formatPointer to a file did not. also some new pointer staging code to use later
2015-12-10 20:06:58 +00:00
Annex.Queue.addUpdateIndex =<<
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
inRepo (Git.UpdateIndex.stageFile sha treeitemtype $ fromRawFilePath file)
Preserve execute bits of unlocked files in v6 mode. When annex.thin is set, adding an object will add the execute bits to the work tree file, and this does mean that the annex object file ends up executable. This doesn't add any complexity that wasn't already present, because git annex add of an executable file has always ingested it so that the annex object ends up executable. But, since an annex object file can be executable or not, when populating an unlocked file from one, the executable bit is always added or removed to match the mode of the pointer file.
2016-04-14 18:30:15 +00:00
where
rename BlobType and add submodule to it This was badly named, it's a not a blob necessarily, but anything that a tree can refer to. Also removed the Show instance which was used for serialization to git format, instead use fmtTreeItemType. This commit was supported by the NSF-funded DataLad project.
2018-05-14 18:22:44 +00:00
treeitemtype
| maybe False isExecutable mode = TreeExecutable
| otherwise = TreeFile
Preserve execute bits of unlocked files in v6 mode. When annex.thin is set, adding an object will add the execute bits to the work tree file, and this does mean that the annex object file ends up executable. This doesn't add any complexity that wasn't already present, because git annex add of an executable file has always ingested it so that the annex object ends up executable. But, since an annex object file can be executable or not, when populating an unlocked file from one, the executable bit is always added or removed to match the mode of the pointer file.
2016-04-14 18:30:15 +00:00
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
writePointerFile :: RawFilePath -> Key -> Maybe FileMode -> IO ()
Preserve execute bits of unlocked files in v6 mode. When annex.thin is set, adding an object will add the execute bits to the work tree file, and this does mean that the annex object file ends up executable. This doesn't add any complexity that wasn't already present, because git annex add of an executable file has always ingested it so that the annex object ends up executable. But, since an annex object file can be executable or not, when populating an unlocked file from one, the executable bit is always added or removed to match the mode of the pointer file.
2016-04-14 18:30:15 +00:00
writePointerFile file k mode = do
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
S.writeFile (fromRawFilePath file) (formatPointer k)
maybe noop (setFileMode $ fromRawFilePath file) mode
always format pointer file with a trailing newline Before the smudge filter added a trailing newline, but other things that wrote formatPointer to a file did not. also some new pointer staging code to use later
2015-12-10 20:06:58 +00:00
better index file refresh method Use git update-index --refresh, since it's a little bit more efficient and the user can be told to run it if a locked index prevents git-annex from running it. This also fixes the problem where an annexed file was deleted in the index and a get of another file that uses the same key caused the index update to add back the deleted file. update-index will not add back the deleted file. Documented in tips/unlocked_files.mdwn the gotcha that the index update may conflict with other operations. I can't see any way to possibly avoid that conflict. One new todo about a race that causes a modification to be accidentially staged. Note that the assistant only flushes the git command queue when it commits a modification. I have not tested the assistant with v6 unlocked files, but assume most users of the assistant won't care if the index shows a file as modified for a while. This commit was supported by the NSF-funded DataLad project.
2018-08-16 17:51:32 +00:00
newtype Restage = Restage Bool
{- Restage pointer file. This is used after updating a worktree file
- when content is added/removed, to prevent git status from showing
- it as modified.
-
- Asks git to refresh its index information for the file.
- That in turn runs the clean filter on the file; when the clean
- filter produces the same pointer that was in the index before, git
- realizes that the file has not actually been modified.
-
- Note that, if the pointer file is staged for deletion, or has different
- content than the current worktree content staged, this won't change
- that. So it's safe to call at any time and any situation.
-
- If the index is known to be locked (eg, git add has run git-annex),
- that would fail. Restage False will prevent the index being updated.
- Will display a message to help the user understand why
- the file will appear to be modified.
-
- This uses the git queue, so the update is not performed immediately,
- and this can be run multiple times cheaply.
narrow the race where a file gets modified before update-index Check just before running update-index if the worktree file's content is still the same, don't update it when it's been modified. This narrows the race window a lot, from possibly minutes or hours, to seconds or less. (Use replaceFile so that the worktree update happens atomically, allowing the InodeCache of the new worktree file to itself be gathered w/o any other race.) This doesn't eliminate the race; it can still occur in the window before update-index runs. When annex.queue is large, a lot of files will be statted by the checks, and so the window may still be large enough to be a problem. When only a few files are being processed, the window is as small as it is in the race where a modification gets overwritten by git-annex when it updates the worktree. Or maybe as small as whatever race git checkout/pull/merge may have when the worktree gets modified during it. Still, I've kept a todo about this race. This commit was supported by the NSF-funded DataLad project.
2018-08-16 19:15:20 +00:00
-
avoid update-index race This commit was supported by the NSF-funded DataLad project.
2018-08-17 20:03:40 +00:00
- The InodeCache is for the worktree file. It is used to detect when
- the worktree file is changed by something else before git update-index
- gets to look at it.
better index file refresh method Use git update-index --refresh, since it's a little bit more efficient and the user can be told to run it if a locked index prevents git-annex from running it. This also fixes the problem where an annexed file was deleted in the index and a get of another file that uses the same key caused the index update to add back the deleted file. update-index will not add back the deleted file. Documented in tips/unlocked_files.mdwn the gotcha that the index update may conflict with other operations. I can't see any way to possibly avoid that conflict. One new todo about a race that causes a modification to be accidentially staged. Note that the assistant only flushes the git command queue when it commits a modification. I have not tested the assistant with v6 unlocked files, but assume most users of the assistant won't care if the index shows a file as modified for a while. This commit was supported by the NSF-funded DataLad project.
2018-08-16 17:51:32 +00:00
-}
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
restagePointerFile :: Restage -> RawFilePath -> InodeCache -> Annex ()
avoid update-index race This commit was supported by the NSF-funded DataLad project.
2018-08-17 20:03:40 +00:00
restagePointerFile (Restage False) f _ =
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
toplevelWarning True $ unableToRestage $ Just $ fromRawFilePath f
fix deadlock Fix a deadlock that could occur after git-annex got an unlocked file, causing the command to hang indefinitely. Known to happen on vfat filesystems, possibly others. Note that a deadlock is still theoretically possible, if anything smudge --clean does causes it to run the git queue for some other reason. Apparently that doesn't happen, but will need to keep an eye on it.
2020-06-18 16:56:29 +00:00
restagePointerFile (Restage True) f orig = withTSDelta $ \tsd ->
-- Avoid refreshing the index if run by the
-- smudge clean filter, because git uses that when
-- it's already refreshing the index, probably because
-- this very action is running. Running it again would likely
-- deadlock.
unlessM (Annex.getState Annex.insmudgecleanfilter) $ do
-- update-index is documented as picky about "./file" and it
-- fails on "../../repo/path/file" when cwd is not in the repo
-- being acted on. Avoid these problems with an absolute path.
more RawFilePath conversion at 377/645 This commit was sponsored by Svenne Krap on Patreon.
2020-10-29 18:20:57 +00:00
absf <- liftIO $ absPath f
Avoid git status taking a long time after git-annex unlock of many files. Implemented by making Git.Queue have a FlushAction, which can accumulate along with another action on files, and runs only once the other action has run. This lets git-annex unlock queue up git update-index actions, without conflicting with the restagePointerFiles FlushActions. In a repository with filter-process enabled, git-annex unlock will often not take any more time than before, though it may when the files are large. Either way, it should always slow down less than git-annex status speeds up. When filter-process is not enabled, git-annex unlock will slow down as much as git status speeds up. Sponsored-by: Jochen Bartl on Patreon
2022-02-18 19:06:40 +00:00
Annex.Queue.addFlushAction runner [(absf, isunmodified tsd, inodeCacheFileSize orig)]
narrow the race where a file gets modified before update-index Check just before running update-index if the worktree file's content is still the same, don't update it when it's been modified. This narrows the race window a lot, from possibly minutes or hours, to seconds or less. (Use replaceFile so that the worktree update happens atomically, allowing the InodeCache of the new worktree file to itself be gathered w/o any other race.) This doesn't eliminate the race; it can still occur in the window before update-index runs. When annex.queue is large, a lot of files will be statted by the checks, and so the window may still be large enough to be a problem. When only a few files are being processed, the window is as small as it is in the race where a modification gets overwritten by git-annex when it updates the worktree. Or maybe as small as whatever race git checkout/pull/merge may have when the worktree gets modified during it. Still, I've kept a todo about this race. This commit was supported by the NSF-funded DataLad project.
2018-08-16 19:15:20 +00:00
where
use filepath-bytestring for annex object manipulations git-annex find is now RawFilePath end to end, no string conversions. So is git-annex get when it does not need to get anything. So this is a major milestone on optimisation. Benchmarks indicate around 30% speedup in both commands. Probably many other performance improvements. All or nearly all places where a file is statted use RawFilePath now.
2019-12-11 18:12:22 +00:00
isunmodified tsd = genInodeCache f tsd >>= return . \case
narrow the race where a file gets modified before update-index Check just before running update-index if the worktree file's content is still the same, don't update it when it's been modified. This narrows the race window a lot, from possibly minutes or hours, to seconds or less. (Use replaceFile so that the worktree update happens atomically, allowing the InodeCache of the new worktree file to itself be gathered w/o any other race.) This doesn't eliminate the race; it can still occur in the window before update-index runs. When annex.queue is large, a lot of files will be statted by the checks, and so the window may still be large enough to be a problem. When only a few files are being processed, the window is as small as it is in the race where a modification gets overwritten by git-annex when it updates the worktree. Or maybe as small as whatever race git checkout/pull/merge may have when the worktree gets modified during it. Still, I've kept a todo about this race. This commit was supported by the NSF-funded DataLad project.
2018-08-16 19:15:20 +00:00
Nothing -> False
Just new -> compareStrong orig new
better index file refresh method Use git update-index --refresh, since it's a little bit more efficient and the user can be told to run it if a locked index prevents git-annex from running it. This also fixes the problem where an annexed file was deleted in the index and a get of another file that uses the same key caused the index update to add back the deleted file. update-index will not add back the deleted file. Documented in tips/unlocked_files.mdwn the gotcha that the index update may conflict with other operations. I can't see any way to possibly avoid that conflict. One new todo about a race that causes a modification to be accidentially staged. Note that the assistant only flushes the git command queue when it commits a modification. I have not tested the assistant with v6 unlocked files, but assume most users of the assistant won't care if the index shows a file as modified for a while. This commit was supported by the NSF-funded DataLad project.
2018-08-16 17:51:32 +00:00
avoid update-index race This commit was supported by the NSF-funded DataLad project.
2018-08-17 20:03:40 +00:00
-- Other changes to the files may have been staged before this
-- gets a chance to run. To avoid a race with any staging of
-- changes, first lock the index file. Then run git update-index
-- on all still-unmodified files, using a copy of the index file,
-- to bypass the lock. Then replace the old index file with the new
-- updated index file.
Avoid git status taking a long time after git-annex unlock of many files. Implemented by making Git.Queue have a FlushAction, which can accumulate along with another action on files, and runs only once the other action has run. This lets git-annex unlock queue up git update-index actions, without conflicting with the restagePointerFiles FlushActions. In a repository with filter-process enabled, git-annex unlock will often not take any more time than before, though it may when the files are large. Either way, it should always slow down less than git-annex status speeds up. When filter-process is not enabled, git-annex unlock will slow down as much as git status speeds up. Sponsored-by: Jochen Bartl on Patreon
2022-02-18 19:06:40 +00:00
runner :: Git.Queue.FlushActionRunner Annex
runner = Git.Queue.FlushActionRunner "restagePointerFile" $ \r l -> do
close keys db to possibly work around WSL1 issue
2021-10-19 17:07:49 +00:00
-- Flush any queued changes to the keys database, so they
-- are visible to child processes.
-- The database is closed because that may improve behavior
-- when run in Windows's WSL1, which has issues with
-- multiple writers to SQL databases.
liftIO . Database.Keys.Handle.closeDbHandle
start splitting out readonly values from AnnexState Values in AnnexRead can be read more efficiently, without MVar overhead. Only a few things have been moved into there, and the performance increase so far is not likely to be noticable. This is groundwork for putting more stuff in there, particularly a value that indicates if debugging is enabled. The obvious next step is to change option parsing to not run in the Annex monad to set values in AnnexState, and instead return a pure value that gets stored in AnnexRead.
2021-04-02 19:26:21 +00:00
=<< Annex.getRead Annex.keysdbhandle
remove one more warningIO Had to generalize Git.Queue so it can run an Annex action, yipes. Only remaining warningIO are in the legacy chunk code.
2019-11-12 14:44:51 +00:00
realindex <- liftIO $ Git.Index.currentIndexFile r
more RawFilePath conversion Converted file mode setting to it, and follow-on changes. Compiles up through 369/646. This commit was sponsored by Ethan Aubin.
2020-11-05 22:45:37 +00:00
let lock = fromRawFilePath (Git.Index.indexFileLock realindex)
remove one more warningIO Had to generalize Git.Queue so it can run an Annex action, yipes. Only remaining warningIO are in the legacy chunk code.
2019-11-12 14:44:51 +00:00
lockindex = liftIO $ catchMaybeIO $ Git.LockFile.openLock' lock
unlockindex = liftIO . maybe noop Git.LockFile.closeLock
showwarning = warning $ unableToRestage Nothing
avoid update-index race This commit was supported by the NSF-funded DataLad project.
2018-08-17 20:03:40 +00:00
go Nothing = showwarning
convert TopFilePath to use RawFilePath Adds a dependency on filepath-bytestring, an as yet unreleased fork of filepath that operates on RawFilePath. Git.Repo also changed to use RawFilePath for the path to the repo. This does eliminate some RawFilePath -> FilePath -> RawFilePath conversions. And filepath-bytestring's </> is probably faster. But I don't expect a major performance improvement from this. This is mostly groundwork for making Annex.Location use RawFilePath, which will allow for a conversion-free pipleline.
2019-12-09 17:49:05 +00:00
go (Just _) = withTmpDirIn (fromRawFilePath $ Git.localGitDir r) "annexindex" $ \tmpdir -> do
avoid update-index race This commit was supported by the NSF-funded DataLad project.
2018-08-17 20:03:40 +00:00
let tmpindex = tmpdir </> "index"
let updatetmpindex = do
more RawFilePath conversion Converted file mode setting to it, and follow-on changes. Compiles up through 369/646. This commit was sponsored by Ethan Aubin.
2020-11-05 22:45:37 +00:00
r' <- liftIO $ Git.Env.addGitEnv r Git.Index.indexEnv
=<< Git.Index.indexEnvVal (toRawFilePath tmpindex)
Revert "disable filter.annex.process in restagePointerFile" This reverts commit afe327ac4947d6d32ff888e7485509be03d9baaf. Unfortunately, disabling it by setting it to "" does not work, git then ignores filter.annex.smudge/clean, and does not pass files through git-annex at all. I don't think there is a way to temporarily disable this git config from the git command line. Which seems like a bug in git. So, it may be more expensive than anticipated to enable filter.annex.process, since git checkout etc will pipe all annexed files being checked out through it.
2021-11-05 16:43:33 +00:00
-- Avoid git warning about CRLF munging.
avoid git warning about CRLF in restagePointerFile Saw it on Windows, could probably also happen on linux with some configuration. Since this is a pointer file, the warning does not apply.
2019-02-18 22:06:35 +00:00
let r'' = r' { gitGlobalOpts = gitGlobalOpts r' ++
[ Param "-c"
, Param $ "core.safecrlf=" ++ boolConfig False
] }
dynamically disable filter-process in restagePointerFile when it would be slower Based on my earlier benchmark, I have a rough cost model for how expensive it is for git-annex smudge to be run on a file, vs how expensive it is for a gigabyte of a file's content to be read and piped through to filter-process. So, using that cost model, it can decide if using filter-process will be more or less expensive than running the smudge filter on the files to be restaged. It turned out to be *really* annoying to temporarily disable filter-process. I did find a way, but urk, this is horrible. Notice that, if it's interrupted with it disabled, it will remain disabled until the next time restagePointerFile runs. Which could be some time later. If the user runs `git add` or `git checkout` on a lot of small files before that, they will see slower than expected performance. (This commit also deletes where I wrote down the benchmark results earlier.) Sponsored-by: Noam Kremen on Patreon
2021-11-08 19:55:27 +00:00
configfilterprocess l $ runsGitAnnexChildProcessViaGit' r'' $ \r''' ->
fix a annex.pidlock issue That made eg git-annex get of an unlocked file hang until the annex.pidlocktimeout and then fail. This fix should be fully thread safe no matter what else git-annex is doing. Only using runsGitAnnexChildProcess in the one place it's known to be a problem. Could audit for all places where git-annex runs itself as a child and add it to all of them, later.
2020-06-17 19:13:52 +00:00
liftIO $ Git.UpdateIndex.refreshIndex r''' $ \feed ->
dynamically disable filter-process in restagePointerFile when it would be slower Based on my earlier benchmark, I have a rough cost model for how expensive it is for git-annex smudge to be run on a file, vs how expensive it is for a gigabyte of a file's content to be read and piped through to filter-process. So, using that cost model, it can decide if using filter-process will be more or less expensive than running the smudge filter on the files to be restaged. It turned out to be *really* annoying to temporarily disable filter-process. I did find a way, but urk, this is horrible. Notice that, if it's interrupted with it disabled, it will remain disabled until the next time restagePointerFile runs. Which could be some time later. If the user runs `git add` or `git checkout` on a lot of small files before that, they will see slower than expected performance. (This commit also deletes where I wrote down the benchmark results earlier.) Sponsored-by: Noam Kremen on Patreon
2021-11-08 19:55:27 +00:00
forM_ l $ \(f', checkunmodified, _) ->
fix a annex.pidlock issue That made eg git-annex get of an unlocked file hang until the annex.pidlocktimeout and then fail. This fix should be fully thread safe no matter what else git-annex is doing. Only using runsGitAnnexChildProcess in the one place it's known to be a problem. Could audit for all places where git-annex runs itself as a child and add it to all of them, later.
2020-06-17 19:13:52 +00:00
whenM checkunmodified $
feed f'
avoid update-index race This commit was supported by the NSF-funded DataLad project.
2018-08-17 20:03:40 +00:00
let replaceindex = catchBoolIO $ do
more RawFilePath conversion Converted file mode setting to it, and follow-on changes. Compiles up through 369/646. This commit was sponsored by Ethan Aubin.
2020-11-05 22:45:37 +00:00
moveFile tmpindex (fromRawFilePath realindex)
avoid update-index race This commit was supported by the NSF-funded DataLad project.
2018-08-17 20:03:40 +00:00
return True
more RawFilePath conversion Converted file mode setting to it, and follow-on changes. Compiles up through 369/646. This commit was sponsored by Ethan Aubin.
2020-11-05 22:45:37 +00:00
ok <- liftIO (createLinkOrCopy (fromRawFilePath realindex) tmpindex)
avoid update-index race This commit was supported by the NSF-funded DataLad project.
2018-08-17 20:03:40 +00:00
<&&> updatetmpindex
fix a annex.pidlock issue That made eg git-annex get of an unlocked file hang until the annex.pidlocktimeout and then fail. This fix should be fully thread safe no matter what else git-annex is doing. Only using runsGitAnnexChildProcess in the one place it's known to be a problem. Could audit for all places where git-annex runs itself as a child and add it to all of them, later.
2020-06-17 19:13:52 +00:00
<&&> liftIO replaceindex
avoid update-index race This commit was supported by the NSF-funded DataLad project.
2018-08-17 20:03:40 +00:00
unless ok showwarning
bracket lockindex unlockindex go
dynamically disable filter-process in restagePointerFile when it would be slower Based on my earlier benchmark, I have a rough cost model for how expensive it is for git-annex smudge to be run on a file, vs how expensive it is for a gigabyte of a file's content to be read and piped through to filter-process. So, using that cost model, it can decide if using filter-process will be more or less expensive than running the smudge filter on the files to be restaged. It turned out to be *really* annoying to temporarily disable filter-process. I did find a way, but urk, this is horrible. Notice that, if it's interrupted with it disabled, it will remain disabled until the next time restagePointerFile runs. Which could be some time later. If the user runs `git add` or `git checkout` on a lot of small files before that, they will see slower than expected performance. (This commit also deletes where I wrote down the benchmark results earlier.) Sponsored-by: Noam Kremen on Patreon
2021-11-08 19:55:27 +00:00
{- filter.annex.process configured to use git-annex filter-process
- is sometimes faster and sometimes slower than using
- git-annex smudge. The latter is run once per file, while
- the former has the content of files piped to it.
-}
filterprocessfaster l =
let numfiles = genericLength l
sizefiles = sum (map thd3 l)
-- estimates based on benchmarking
estimate_enabled = sizefiles `div` 191739611
estimate_disabled = numfiles `div` 7
in estimate_enabled <= estimate_disabled
{- This disables filter.annex.process if it's set when it would
- probably not be faster to use it. Unfortunately, simply
- passing -c filter.annex.process= also prevents git from
- running the smudge filter, so .git/config has to be modified
- to disable it. The modification is reversed at the end. In
- case this process is terminated early, the next time this
- runs it will take care of reversing the modification.
-}
configfilterprocess l = bracket setup cleanup . const
where
setup
| filterprocessfaster l = return Nothing
| otherwise = fromRepo (Git.Config.getMaybe ck) >>= \case
Nothing -> return Nothing
Just v -> do
void $ inRepo (Git.Config.change ckd (fromConfigValue v))
void $ inRepo (Git.Config.unset ck)
return (Just v)
cleanup (Just v) = do
void $ inRepo $ Git.Config.change ck (fromConfigValue v)
void $ inRepo (Git.Config.unset ckd)
cleanup Nothing = fromRepo (Git.Config.getMaybe ckd) >>= \case
Nothing -> return ()
Just v -> do
whenM (isNothing <$> fromRepo (Git.Config.getMaybe ck)) $
void $ inRepo (Git.Config.change ck (fromConfigValue v))
void $ inRepo (Git.Config.unset ckd)
ck = ConfigKey "filter.annex.process"
ckd = ConfigKey "filter.annex.process-temp-disabled"
avoid update-index race This commit was supported by the NSF-funded DataLad project.
2018-08-17 20:03:40 +00:00
unableToRestage :: Maybe FilePath -> String
unableToRestage mf = unwords
[ "git status will show " ++ fromMaybe "some files" mf
, "to be modified, since content availability has changed"
, "and git-annex was unable to update the index."
, "This is only a cosmetic problem affecting git status; git add,"
, "git commit, etc won't be affected."
, "To fix the git status display, you can run:"
, "git update-index -q --refresh " ++ fromMaybe "<file>" mf
]
fully specify the pointer file format This format is designed to detect accidental appends, while having some room for future expansion. Detect when an unlocked file whose content is not present has gotten some other content appended to it, and avoid treating it as a pointer file, so that appended content will not be checked into git, but will be annexed like any other file. Dropped the max size of a pointer file down to 32kb, it was around 80 kb, but without any good reason and certianly there are no valid pointer files anywhere that are larger than 8kb, because it's just been specified what it means for a pointer file with additional data even looks like. I assume 32kb will be good enough for anyone. ;-) Really though, it needs to be some smallish number, because that much of a file in git gets read into memory when eg, catting pointer files. And since we have no use cases for the extra lines of a pointer file yet, except possibly to add some human-visible explanation that it is a git-annex pointer file, 32k seems as reasonable an arbitrary number as anything. Increasing it would be possible, eg to 64k, as long as users of such jumbo pointer files didn't mind upgrading all their git-annex installations to one that supports the new larger size. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 18:20:31 +00:00
{- Parses a symlink target or a pointer file to a Key.
-
- Makes sure that the pointer file is valid, including not being longer
- than the maximum allowed size of a valid pointer file, and that any
- subsequent lines after the first contain the validPointerLineTag.
- If a valid pointer file gets some other data appended to it, it should
- never be considered valid, unless that data happened to itself be a
- valid pointer file.
-}
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
parseLinkTargetOrPointer :: S.ByteString -> Maybe Key
smudge: Warn when encountering a pointer file that has other content appended to it It will then proceed to add the file the same as if it were any other file containing possibly annexable content. Usually the file is one that was annexed before, so the new, probably corrupt content will also be added to the annex. If the file was not annexed before, the content will be added to git. It's not possible for the smudge filter to throw an error here, because git then just adds the file to git anyway. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 19:17:08 +00:00
parseLinkTargetOrPointer = either (const Nothing) id
. parseLinkTargetOrPointer'
data InvalidAppendedPointerFile = InvalidAppendedPointerFile
parseLinkTargetOrPointer' :: S.ByteString -> Either InvalidAppendedPointerFile (Maybe Key)
parseLinkTargetOrPointer' b =
let (firstline, rest) = S8.span (/= '\n') b
in case parsekey $ droptrailing '\r' firstline of
Just k
| S.length b > maxValidPointerSz -> Left InvalidAppendedPointerFile
| restvalid (dropleading '\n' rest) -> Right (Just k)
| otherwise -> Left InvalidAppendedPointerFile
Nothing -> Right Nothing
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
where
fully specify the pointer file format This format is designed to detect accidental appends, while having some room for future expansion. Detect when an unlocked file whose content is not present has gotten some other content appended to it, and avoid treating it as a pointer file, so that appended content will not be checked into git, but will be annexed like any other file. Dropped the max size of a pointer file down to 32kb, it was around 80 kb, but without any good reason and certianly there are no valid pointer files anywhere that are larger than 8kb, because it's just been specified what it means for a pointer file with additional data even looks like. I assume 32kb will be good enough for anyone. ;-) Really though, it needs to be some smallish number, because that much of a file in git gets read into memory when eg, catting pointer files. And since we have no use cases for the extra lines of a pointer file yet, except possibly to add some human-visible explanation that it is a git-annex pointer file, 32k seems as reasonable an arbitrary number as anything. Increasing it would be possible, eg to 64k, as long as users of such jumbo pointer files didn't mind upgrading all their git-annex installations to one that supports the new larger size. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 18:20:31 +00:00
parsekey l
fold parseLinkTarget into parseLinkTargetOrPointer Only one place remained that differentiated between them. It is the case that a symlink target that happens to contain a newline somehow will be treated as a link to a key truncated at the newline. This is super unlikely to happen, and since a key cannot actually contain a newline, it's as good a behavior as any. Anyway, this commit does not change the behavior there, although arguably it should be changed. Note that getAnnexLinkTarget does prevent a symlink target containing a newline. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 16:24:09 +00:00
| isLinkToAnnex l = fileKey $ snd $ S8.breakEnd pathsep l
| otherwise = Nothing
fully specify the pointer file format This format is designed to detect accidental appends, while having some room for future expansion. Detect when an unlocked file whose content is not present has gotten some other content appended to it, and avoid treating it as a pointer file, so that appended content will not be checked into git, but will be annexed like any other file. Dropped the max size of a pointer file down to 32kb, it was around 80 kb, but without any good reason and certianly there are no valid pointer files anywhere that are larger than 8kb, because it's just been specified what it means for a pointer file with additional data even looks like. I assume 32kb will be good enough for anyone. ;-) Really though, it needs to be some smallish number, because that much of a file in git gets read into memory when eg, catting pointer files. And since we have no use cases for the extra lines of a pointer file yet, except possibly to add some human-visible explanation that it is a git-annex pointer file, 32k seems as reasonable an arbitrary number as anything. Increasing it would be possible, eg to 64k, as long as users of such jumbo pointer files didn't mind upgrading all their git-annex installations to one that supports the new larger size. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 18:20:31 +00:00
restvalid r
| S.null r = True
| otherwise =
let (l, r') = S8.span (/= '\n') r
in validPointerLineTag `S.isInfixOf` l
&& (not (S8.null r') && S8.head r' == '\n')
&& restvalid (S8.tail r')
dropleading c l
| S.null l = l
| S8.head l == c = S8.tail l
| otherwise = l
fold parseLinkTarget into parseLinkTargetOrPointer Only one place remained that differentiated between them. It is the case that a symlink target that happens to contain a newline somehow will be treated as a link to a key truncated at the newline. This is super unlikely to happen, and since a key cannot actually contain a newline, it's as good a behavior as any. Anyway, this commit does not change the behavior there, although arguably it should be changed. Note that getAnnexLinkTarget does prevent a symlink target containing a newline. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 16:24:09 +00:00
fully specify the pointer file format This format is designed to detect accidental appends, while having some room for future expansion. Detect when an unlocked file whose content is not present has gotten some other content appended to it, and avoid treating it as a pointer file, so that appended content will not be checked into git, but will be annexed like any other file. Dropped the max size of a pointer file down to 32kb, it was around 80 kb, but without any good reason and certianly there are no valid pointer files anywhere that are larger than 8kb, because it's just been specified what it means for a pointer file with additional data even looks like. I assume 32kb will be good enough for anyone. ;-) Really though, it needs to be some smallish number, because that much of a file in git gets read into memory when eg, catting pointer files. And since we have no use cases for the extra lines of a pointer file yet, except possibly to add some human-visible explanation that it is a git-annex pointer file, 32k seems as reasonable an arbitrary number as anything. Increasing it would be possible, eg to 64k, as long as users of such jumbo pointer files didn't mind upgrading all their git-annex installations to one that supports the new larger size. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 18:20:31 +00:00
droptrailing c l
| S.null l = l
| S8.last l == c = S8.init l
| otherwise = l
fold parseLinkTarget into parseLinkTargetOrPointer Only one place remained that differentiated between them. It is the case that a symlink target that happens to contain a newline somehow will be treated as a link to a key truncated at the newline. This is super unlikely to happen, and since a key cannot actually contain a newline, it's as good a behavior as any. Anyway, this commit does not change the behavior there, although arguably it should be changed. Note that getAnnexLinkTarget does prevent a symlink target containing a newline. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 16:24:09 +00:00
pathsep '/' = True
#ifdef mingw32_HOST_OS
pathsep '\\' = True
#endif
pathsep _ = False
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
{- Avoid looking at more of the lazy ByteString than necessary since it
- could be reading from a large file that is not a pointer file. -}
parseLinkTargetOrPointerLazy :: L.ByteString -> Maybe Key
smudge: Warn when encountering a pointer file that has other content appended to it It will then proceed to add the file the same as if it were any other file containing possibly annexable content. Usually the file is one that was annexed before, so the new, probably corrupt content will also be added to the annex. If the file was not annexed before, the content will be added to git. It's not possible for the smudge filter to throw an error here, because git then just adds the file to git anyway. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 19:17:08 +00:00
parseLinkTargetOrPointerLazy = either (const Nothing) id
. parseLinkTargetOrPointerLazy'
parseLinkTargetOrPointerLazy' :: L.ByteString -> Either InvalidAppendedPointerFile (Maybe Key)
parseLinkTargetOrPointerLazy' b =
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
let b' = L.take (fromIntegral maxPointerSz) b
smudge: Warn when encountering a pointer file that has other content appended to it It will then proceed to add the file the same as if it were any other file containing possibly annexable content. Usually the file is one that was annexed before, so the new, probably corrupt content will also be added to the annex. If the file was not annexed before, the content will be added to git. It's not possible for the smudge filter to throw an error here, because git then just adds the file to git anyway. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 19:17:08 +00:00
in parseLinkTargetOrPointer' (L.toStrict b')
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
formatPointer :: Key -> S.ByteString
more RawFilePath Remove dup definitions and just use the RawFilePath one. </> etc are enough faster that it's probably faster than building a String directly, although I have not benchmarked.
2019-12-18 20:45:03 +00:00
formatPointer k = prefix <> keyFile k <> nl
refactor and improve pointer file handling code
2015-12-09 18:25:33 +00:00
where
more RawFilePath Remove dup definitions and just use the RawFilePath one. </> etc are enough faster that it's probably faster than building a String directly, although I have not benchmarked.
2019-12-18 20:45:03 +00:00
prefix = toInternalGitPath $ P.pathSeparator `S.cons` objectDir'
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
nl = S8.singleton '\n'
Fix memory leak in last release, which affected commands like git-annex status when a large non-annexed file is present in the work tree. The whole file was strictly read, and so buffered in memory, and remained buffered for some time when running git-annex status.
2016-02-19 18:45:26 +00:00
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
{- Maximum size of a file that could be a pointer to a key.
- Check to avoid buffering really big files in git into
Fix memory leak in last release, which affected commands like git-annex status when a large non-annexed file is present in the work tree. The whole file was strictly read, and so buffered in memory, and remained buffered for some time when running git-annex status.
2016-02-19 18:45:26 +00:00
- memory when reading files that may be pointers.
-
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
- 8192 bytes is plenty for a pointer to a key. This adds some additional
read a consistent amount from pointer file A few places were reading the max symlink size of a pointer file, then passing tp parseLinkTargetOrPointer. Which is fine currently, but to support pointer files with lines of data after the pointer, enough has to be read that parseLinkTargetOrPointer can be assured of seeing enough of that data to know if it's correctly formatted. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 16:38:35 +00:00
- padding to allow for pointer files that have lines of additional data
fully specify the pointer file format This format is designed to detect accidental appends, while having some room for future expansion. Detect when an unlocked file whose content is not present has gotten some other content appended to it, and avoid treating it as a pointer file, so that appended content will not be checked into git, but will be annexed like any other file. Dropped the max size of a pointer file down to 32kb, it was around 80 kb, but without any good reason and certianly there are no valid pointer files anywhere that are larger than 8kb, because it's just been specified what it means for a pointer file with additional data even looks like. I assume 32kb will be good enough for anyone. ;-) Really though, it needs to be some smallish number, because that much of a file in git gets read into memory when eg, catting pointer files. And since we have no use cases for the extra lines of a pointer file yet, except possibly to add some human-visible explanation that it is a git-annex pointer file, 32k seems as reasonable an arbitrary number as anything. Increasing it would be possible, eg to 64k, as long as users of such jumbo pointer files didn't mind upgrading all their git-annex installations to one that supports the new larger size. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 18:20:31 +00:00
- after the key.
-
- One additional byte is used to detect when a valid pointer file
- got something else appended to it.
-}
read a consistent amount from pointer file A few places were reading the max symlink size of a pointer file, then passing tp parseLinkTargetOrPointer. Which is fine currently, but to support pointer files with lines of data after the pointer, enough has to be read that parseLinkTargetOrPointer can be assured of seeing enough of that data to know if it's correctly formatted. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 16:38:35 +00:00
maxPointerSz :: Int
fully specify the pointer file format This format is designed to detect accidental appends, while having some room for future expansion. Detect when an unlocked file whose content is not present has gotten some other content appended to it, and avoid treating it as a pointer file, so that appended content will not be checked into git, but will be annexed like any other file. Dropped the max size of a pointer file down to 32kb, it was around 80 kb, but without any good reason and certianly there are no valid pointer files anywhere that are larger than 8kb, because it's just been specified what it means for a pointer file with additional data even looks like. I assume 32kb will be good enough for anyone. ;-) Really though, it needs to be some smallish number, because that much of a file in git gets read into memory when eg, catting pointer files. And since we have no use cases for the extra lines of a pointer file yet, except possibly to add some human-visible explanation that it is a git-annex pointer file, 32k seems as reasonable an arbitrary number as anything. Increasing it would be possible, eg to 64k, as long as users of such jumbo pointer files didn't mind upgrading all their git-annex installations to one that supports the new larger size. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 18:20:31 +00:00
maxPointerSz = maxValidPointerSz + 1
{- Maximum size of a valid pointer files is 32kb. -}
maxValidPointerSz :: Int
maxValidPointerSz = 32768
refactor and improve pointer file handling code
2015-12-09 18:25:33 +00:00
read a consistent amount from pointer file A few places were reading the max symlink size of a pointer file, then passing tp parseLinkTargetOrPointer. Which is fine currently, but to support pointer files with lines of data after the pointer, enough has to be read that parseLinkTargetOrPointer can be assured of seeing enough of that data to know if it's correctly formatted. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 16:38:35 +00:00
maxSymlinkSz :: Int
maxSymlinkSz = 8192
refactor and improve pointer file handling code
2015-12-09 18:25:33 +00:00
Correct git-annex info to include unlocked files in v6 repository. An unlocked present file does not have a pointer file in the worktree, so info skipped counting it. It may be that unused was also affected by the problem, but it seemed not to be in my tests. I think because of the use of the associatedFilesFilter. This fix slows down both info and unused a little bit, since they have to query the contents of files from git, but only when handling unlocked files.
2016-03-14 17:13:56 +00:00
{- Checks if a worktree file is a pointer to a key.
-
handle edge case of symlink to something that is not really a pointer file That seems very unlikely to happen, but still, it's possible it could. And with the recent addition of locked files to the keys db, this could be called by places that did not call it before, so it seems even more important it's correct. Adds an extra stat of the file, and is potentially racy, but both problems are fixed by the unix-2.8.0 path. I have not tested that path builds because that package is not yet released and it would be difficult to install it since it's tightly tied to a ghc version.
2021-06-14 15:29:49 +00:00
- Unlocked files whose content is present are not detected by this.
-
- It's possible, though unlikely, that an annex symlink points to
- an object that looks like a pointer file. Or that a non-annex
- symlink does. Avoids a false positive in those cases.
- -}
wip RawFilePath 2x git-annex find speedup Finally builds (oh the agoncy of making it build), but still very unmergable, only Command.Find is included and lots of stuff is badly hacked to make it compile. Benchmarking vs master, this git-annex find is significantly faster! Specifically: num files old new speedup 48500 4.77 3.73 28% 12500 1.36 1.02 66% 20 0.075 0.074 0% (so startup time is unchanged) That's without really finishing the optimization. Things still to do: * Eliminate all the fromRawFilePath, toRawFilePath, encodeBS, decodeBS conversions. * Use versions of IO actions like getFileStatus that take a RawFilePath. * Eliminate some Data.ByteString.Lazy.toStrict, which is a slow copy. * Use ByteString for parsing git config to speed up startup. It's likely several of those will speed up git-annex find further. And other commands will certianly benefit even more.
2019-11-26 19:27:22 +00:00
isPointerFile :: RawFilePath -> IO (Maybe Key)
check symlink before reading file This is faster because when multiple files are in a directory, it gets cached.
2021-06-14 15:53:51 +00:00
isPointerFile f = catchDefaultIO Nothing $
handle edge case of symlink to something that is not really a pointer file That seems very unlikely to happen, but still, it's possible it could. And with the recent addition of locked files to the keys db, this could be called by places that did not call it before, so it seems even more important it's correct. Adds an extra stat of the file, and is potentially racy, but both problems are fixed by the unix-2.8.0 path. I have not tested that path builds because that package is not yet released and it would be difficult to install it since it's tightly tied to a ghc version.
2021-06-14 15:29:49 +00:00
#if defined(mingw32_HOST_OS)
checkcontentfollowssymlinks -- no symlinks supported on windows
#else
#if MIN_VERSION_unix(2,8,0)
bracket
(openFd (fromRawFilePath f) ReadOnly (defaultFileFlags { nofollow = True }) Nothing)
closeFd
(\fd -> readhandle =<< fdToHandle fd)
#else
check symlink before reading file This is faster because when multiple files are in a directory, it gets cached.
2021-06-14 15:53:51 +00:00
ifM (isSymbolicLink <$> R.getSymbolicLinkStatus f)
( return Nothing
, checkcontentfollowssymlinks
)
handle edge case of symlink to something that is not really a pointer file That seems very unlikely to happen, but still, it's possible it could. And with the recent addition of locked files to the keys db, this could be called by places that did not call it before, so it seems even more important it's correct. Adds an extra stat of the file, and is potentially racy, but both problems are fixed by the unix-2.8.0 path. I have not tested that path builds because that package is not yet released and it would be difficult to install it since it's tightly tied to a ghc version.
2021-06-14 15:29:49 +00:00
#endif
#endif
where
checkcontentfollowssymlinks =
withFile (fromRawFilePath f) ReadMode readhandle
read a consistent amount from pointer file A few places were reading the max symlink size of a pointer file, then passing tp parseLinkTargetOrPointer. Which is fine currently, but to support pointer files with lines of data after the pointer, enough has to be read that parseLinkTargetOrPointer can be assured of seeing enough of that data to know if it's correctly formatted. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 16:38:35 +00:00
readhandle h = parseLinkTargetOrPointer <$> S.hGet h maxPointerSz
Windows: Fix v6 unlocked files to actually work. Pointer files were not being treated as annex content, so "git annex get" didn't replace them with the object.
2016-02-15 20:12:18 +00:00
{- Checks a symlink target or pointer file first line to see if it
- appears to point to annexed content.
-
- We only look for paths inside the .git directory, and not at the .git
- directory itself, because GIT_DIR may cause a directory name other
- than .git to be used.
-}
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
isLinkToAnnex :: S.ByteString -> Bool
isLinkToAnnex s = p `S.isInfixOf` s
Windows: Fix v6 unlocked files to actually work. Pointer files were not being treated as annex content, so "git annex get" didn't replace them with the object.
2016-02-15 20:12:18 +00:00
#ifdef mingw32_HOST_OS
Fix path separator bug on Windows that completely broke git-annex since version 7.20190122.
2019-02-18 21:16:39 +00:00
-- '/' is used inside pointer files on Windows, not the native '\'
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
|| p' `S.isInfixOf` s
#endif
where
use filepath-bytestring for annex object manipulations git-annex find is now RawFilePath end to end, no string conversions. So is git-annex get when it does not need to get anything. So this is a major milestone on optimisation. Benchmarks indicate around 30% speedup in both commands. Probably many other performance improvements. All or nearly all places where a file is statted use RawFilePath now.
2019-12-11 18:12:22 +00:00
p = P.pathSeparator `S.cons` objectDir'
use ByteStrings when reading annex symlinks and pointers Now there's a ByteString used all the way from disk to Key. The main complication in this conversion was the use of fromInternalGitPath in several places to munge things on Windows. The things that used that were changed to parse the ByteString using either path separator. Also some code that had read from files to a String lazily was changed to read a minimal strict ByteString.
2019-01-14 19:19:20 +00:00
#ifdef mingw32_HOST_OS
use filepath-bytestring for annex object manipulations git-annex find is now RawFilePath end to end, no string conversions. So is git-annex get when it does not need to get anything. So this is a major milestone on optimisation. Benchmarks indicate around 30% speedup in both commands. Probably many other performance improvements. All or nearly all places where a file is statted use RawFilePath now.
2019-12-11 18:12:22 +00:00
p' = toInternalGitPath p
Windows: Fix v6 unlocked files to actually work. Pointer files were not being treated as annex content, so "git annex get" didn't replace them with the object.
2016-02-15 20:12:18 +00:00
#endif
fully specify the pointer file format This format is designed to detect accidental appends, while having some room for future expansion. Detect when an unlocked file whose content is not present has gotten some other content appended to it, and avoid treating it as a pointer file, so that appended content will not be checked into git, but will be annexed like any other file. Dropped the max size of a pointer file down to 32kb, it was around 80 kb, but without any good reason and certianly there are no valid pointer files anywhere that are larger than 8kb, because it's just been specified what it means for a pointer file with additional data even looks like. I assume 32kb will be good enough for anyone. ;-) Really though, it needs to be some smallish number, because that much of a file in git gets read into memory when eg, catting pointer files. And since we have no use cases for the extra lines of a pointer file yet, except possibly to add some human-visible explanation that it is a git-annex pointer file, 32k seems as reasonable an arbitrary number as anything. Increasing it would be possible, eg to 64k, as long as users of such jumbo pointer files didn't mind upgrading all their git-annex installations to one that supports the new larger size. Sponsored-by: Dartmouth College's Datalad project
2022-02-23 18:20:31 +00:00
{- String that must appear on every line of a valid pointer file. -}
validPointerLineTag :: S.ByteString
validPointerLineTag = "/annex/"
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