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add annex.dbdir (WIP)

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WIP: This is mostly complete, but there is a problem: createDirectoryUnder
throws an error when annex.dbdir is set to outside the git repo.

annex.dbdir is a workaround for filesystems where sqlite does not work,
due to eg, the filesystem not properly supporting locking.

It's intended to be set before initializing the repository. Changing it
in an existing repository can be done, but would be the same as making a
new repository and moving all the annexed objects into it. While the
databases get recreated from the git-annex branch in that situation, any
information that is in the databases but not stored in the branch gets
lost. It may be that no information ever gets stored in the databases
that cannot be reconstructed from the branch, but I have not verified
that.

Sponsored-by: Dartmouth College's Datalad project
This commit is contained in:
Joey Hess 2022-08-11 16:57:44 -04:00
parent 425deaf615
commit e60766543f
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GPG key ID: DB12DB0FF05F8F38
26 changed files with 152 additions and 104 deletions
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11
Upgrade/V7.hs
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@ -37,17 +37,17 @@ upgrade automatic = do
-- The old content identifier database is deleted here, but the
-- new database is not populated. It will be automatically
-- populated from the git-annex branch the next time it is used.
removeOldDb gitAnnexContentIdentifierDbDirOld
removeOldDb . fromRawFilePath =<< fromRepo gitAnnexContentIdentifierDbDirOld
liftIO . removeWhenExistsWith R.removeLink
=<< fromRepo gitAnnexContentIdentifierLockOld
-- The export databases are deleted here. The new databases
-- will be populated by the next thing that needs them, the same
-- way as they would be in a fresh clone.
removeOldDb gitAnnexExportDir
removeOldDb . fromRawFilePath =<< calcRepo' gitAnnexExportDir
populateKeysDb
removeOldDb gitAnnexKeysDbOld
removeOldDb . fromRawFilePath =<< fromRepo gitAnnexKeysDbOld
liftIO . removeWhenExistsWith R.removeLink
=<< fromRepo gitAnnexKeysDbIndexCacheOld
liftIO . removeWhenExistsWith R.removeLink
@ -72,9 +72,8 @@ gitAnnexContentIdentifierDbDirOld r = gitAnnexDir r P.</> "cids"
gitAnnexContentIdentifierLockOld :: Git.Repo -> RawFilePath
gitAnnexContentIdentifierLockOld r = gitAnnexContentIdentifierDbDirOld r <> ".lck"
removeOldDb :: (Git.Repo -> RawFilePath) -> Annex ()
removeOldDb getdb = do
db <- fromRawFilePath <$> fromRepo getdb
removeOldDb :: FilePath -> Annex ()
removeOldDb db =
whenM (liftIO $ doesDirectoryExist db) $ do
v <- liftIO $ tryNonAsync $
#if MIN_VERSION_directory(1,2,7)