34c8af74ba
I've been disliking how the command seek actions were written for some time, with their inversion of control and ugly workarounds. The last straw to fix it was sync --content, which didn't fit the Annex [CommandStart] interface well at all. I have not yet made it take advantage of the changed interface though. The crucial change, and probably why I didn't do it this way from the beginning, is to make each CommandStart action be run with exceptions caught, and if it fails, increment a failure counter in annex state. So I finally remove the very first code I wrote for git-annex, which was before I had exception handling in the Annex monad, and so ran outside that monad, passing state explicitly as it ran each CommandStart action. This was a real slog from 1 to 5 am. Test suite passes. Memory usage is lower than before, sometimes by a couple of megabytes, and remains constant, even when running in a large repo, and even when repeatedly failing and incrementing the error counter. So no accidental laziness space leaks. Wall clock speed is identical, even in large repos. This commit was sponsored by an anonymous bitcoiner.
57 lines
1.7 KiB
Haskell
57 lines
1.7 KiB
Haskell
{- git-annex command
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-
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- Copyright 2010 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Command.Whereis where
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import qualified Data.Map as M
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import Common.Annex
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import Command
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import Remote
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import Logs.Trust
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import GitAnnex.Options
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def :: [Command]
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def = [noCommit $ withOptions [jsonOption] $
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command "whereis" paramPaths seek SectionQuery
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"lists repositories that have file content"]
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seek :: CommandSeek
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seek ps = do
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m <- remoteMap id
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withFilesInGit (whenAnnexed $ start m) ps
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start :: M.Map UUID Remote -> FilePath -> (Key, Backend) -> CommandStart
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start remotemap file (key, _) = do
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showStart "whereis" file
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next $ perform remotemap key
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perform :: M.Map UUID Remote -> Key -> CommandPerform
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perform remotemap key = do
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locations <- keyLocations key
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(untrustedlocations, safelocations) <- trustPartition UnTrusted locations
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let num = length safelocations
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showNote $ show num ++ " " ++ copiesplural num
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pp <- prettyPrintUUIDs "whereis" safelocations
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unless (null safelocations) $ showLongNote pp
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pp' <- prettyPrintUUIDs "untrusted" untrustedlocations
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unless (null untrustedlocations) $ showLongNote $ untrustedheader ++ pp'
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forM_ (mapMaybe (`M.lookup` remotemap) locations) $
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performRemote key
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if null safelocations then stop else next $ return True
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where
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copiesplural 1 = "copy"
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copiesplural _ = "copies"
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untrustedheader = "The following untrusted locations may also have copies:\n"
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performRemote :: Key -> Remote -> Annex ()
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performRemote key remote = maybe noop go $ whereisKey remote
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where
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go a = do
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ls <- a key
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unless (null ls) $ showLongNote $ unlines $
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map (\l -> name remote ++ ": " ++ l) ls
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