a335c1e46e
Completes work started in e60766543f
I've verified that all the sqlite databases get stored in annex.dbdir
and are created successfully. If annex.dbdir does not exist, it will be
created; its parent directory must already exist though.
Sponsored-by: Dartmouth College's Datalad project
65 lines
2.1 KiB
Haskell
65 lines
2.1 KiB
Haskell
{- Persistent sqlite database initialization
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-
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- Copyright 2015-2020 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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{-# LANGUAGE OverloadedStrings #-}
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module Database.Init where
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import Annex.Common
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import qualified Annex
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import Annex.Perms
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import Utility.FileMode
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import Utility.Directory.Create
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import qualified Utility.RawFilePath as R
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import Database.Persist.Sqlite
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import Lens.Micro
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import qualified Data.Text as T
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import qualified System.FilePath.ByteString as P
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{- Ensures that the database is freshly initialized. Deletes any
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- existing database. Pass the migration action for the database.
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-
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- The permissions of the database are set based on the
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- core.sharedRepository setting. Setting these permissions on the main db
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- file causes Sqlite to always use the same permissions for additional
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- files it writes later on
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-}
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initDb :: P.RawFilePath -> SqlPersistM () -> Annex ()
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initDb db migration = do
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let dbdir = P.takeDirectory db
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let tmpdbdir = dbdir <> ".tmp"
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let tmpdb = tmpdbdir P.</> "db"
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let tdb = T.pack (fromRawFilePath tmpdb)
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gc <- Annex.getGitConfig
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top <- parentDir <$> fromRepo gitAnnexDir
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let tops = case annexDbDir gc of
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Just topdbdir -> [top, parentDir topdbdir]
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Nothing -> [top]
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liftIO $ do
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createDirectoryUnder tops tmpdbdir
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runSqliteInfo (enableWAL tdb) migration
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setAnnexDirPerm tmpdbdir
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-- Work around sqlite bug that prevents it from honoring
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-- less restrictive umasks.
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liftIO $ R.setFileMode tmpdb =<< defaultFileMode
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setAnnexFilePerm tmpdb
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liftIO $ do
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void $ tryIO $ removeDirectoryRecursive (fromRawFilePath dbdir)
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R.rename tmpdbdir dbdir
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{- Make sure that the database uses WAL mode, to prevent readers
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- from blocking writers, and prevent a writer from blocking readers.
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-
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- This is the default in recent persistent-sqlite versions, but
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- force it on just in case.
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-
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- Note that once WAL mode is enabled, it will persist whenever the
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- database is opened. -}
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enableWAL :: T.Text -> SqliteConnectionInfo
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enableWAL db = over walEnabled (const True) $
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mkSqliteConnectionInfo db
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