git-annex/Types/ActionItem.hs

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{- items that a command can act on
-
- Copyright 2016-2023 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU AGPL version 3 or higher.
-}
{-# LANGUAGE TypeSynonymInstances, FlexibleInstances #-}
module Types.ActionItem (
module Types.ActionItem,
StringContainingQuotedPath(..),
) where
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import Key
import Types.Transfer
import Types.UUID
import Types.FileMatcher
import Git.FilePath
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import Git.Quote (StringContainingQuotedPath(..))
import Utility.FileSystemEncoding
data ActionItem
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= ActionItemAssociatedFile AssociatedFile Key
| ActionItemKey Key
| ActionItemBranchFilePath BranchFilePath Key
| ActionItemFailedTransfer Transfer TransferInfo
| ActionItemTreeFile RawFilePath
| ActionItemUUID UUID StringContainingQuotedPath
-- ^ UUID with a description or name of the repository
| ActionItemOther (Maybe StringContainingQuotedPath)
| OnlyActionOn Key ActionItem
-- ^ Use to avoid more than one thread concurrently processing the
-- same Key.
deriving (Show, Eq)
class MkActionItem t where
mkActionItem :: t -> ActionItem
make CommandStart return a StartMessage The goal is to be able to run CommandStart in the main thread when -J is used, rather than unncessarily passing it off to a worker thread, which incurs overhead that is signficant when the CommandStart is going to quickly decide to stop. To do that, the message it displays needs to be displayed in the worker thread, after the CommandStart has run. Also, the change will mean that CommandStart will no longer necessarily run with the same Annex state as CommandPerform. While its docs already said it should avoid modifying Annex state, I audited all the CommandStart code as part of the conversion. (Note that CommandSeek already sometimes runs with a different Annex state, and that has not been a source of any problems, so I am not too worried that this change will lead to breakage going forward.) The only modification of Annex state I found was it calling allowMessages in some Commands that default to noMessages. Dealt with that by adding a startCustomOutput and a startingUsualMessages. This lets a command start with noMessages and then select the output it wants for each CommandStart. One bit of breakage: onlyActionOn has been removed from commands that used it. The plan is that, since a StartMessage contains an ActionItem, when a Key can be extracted from that, the parallel job runner can run onlyActionOn' automatically. Then commands won't need to worry about this detail. Future work. Otherwise, this was a fairly straightforward process of making each CommandStart compile again. Hopefully other behavior changes were mostly avoided. In a few cases, a command had a CommandStart that called a CommandPerform that then called showStart multiple times. I have collapsed those down to a single start action. The main command to perhaps suffer from it is Command.Direct, which used to show a start for each file, and no longer does. Another minor behavior change is that some commands used showStart before, but had an associated file and a Key available, so were changed to ShowStart with an ActionItemAssociatedFile. That will not change the normal output or behavior, but --json output will now include the key. This should not break it for anyone using a real json parser.
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instance MkActionItem ActionItem where
mkActionItem = id
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instance MkActionItem (AssociatedFile, Key) where
mkActionItem = uncurry ActionItemAssociatedFile
instance MkActionItem (Key, AssociatedFile) where
mkActionItem = uncurry $ flip ActionItemAssociatedFile
instance MkActionItem (Key, RawFilePath) where
make CommandStart return a StartMessage The goal is to be able to run CommandStart in the main thread when -J is used, rather than unncessarily passing it off to a worker thread, which incurs overhead that is signficant when the CommandStart is going to quickly decide to stop. To do that, the message it displays needs to be displayed in the worker thread, after the CommandStart has run. Also, the change will mean that CommandStart will no longer necessarily run with the same Annex state as CommandPerform. While its docs already said it should avoid modifying Annex state, I audited all the CommandStart code as part of the conversion. (Note that CommandSeek already sometimes runs with a different Annex state, and that has not been a source of any problems, so I am not too worried that this change will lead to breakage going forward.) The only modification of Annex state I found was it calling allowMessages in some Commands that default to noMessages. Dealt with that by adding a startCustomOutput and a startingUsualMessages. This lets a command start with noMessages and then select the output it wants for each CommandStart. One bit of breakage: onlyActionOn has been removed from commands that used it. The plan is that, since a StartMessage contains an ActionItem, when a Key can be extracted from that, the parallel job runner can run onlyActionOn' automatically. Then commands won't need to worry about this detail. Future work. Otherwise, this was a fairly straightforward process of making each CommandStart compile again. Hopefully other behavior changes were mostly avoided. In a few cases, a command had a CommandStart that called a CommandPerform that then called showStart multiple times. I have collapsed those down to a single start action. The main command to perhaps suffer from it is Command.Direct, which used to show a start for each file, and no longer does. Another minor behavior change is that some commands used showStart before, but had an associated file and a Key available, so were changed to ShowStart with an ActionItemAssociatedFile. That will not change the normal output or behavior, but --json output will now include the key. This should not break it for anyone using a real json parser.
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mkActionItem (key, file) = ActionItemAssociatedFile (AssociatedFile (Just file)) key
instance MkActionItem (RawFilePath, Key) where
make CommandStart return a StartMessage The goal is to be able to run CommandStart in the main thread when -J is used, rather than unncessarily passing it off to a worker thread, which incurs overhead that is signficant when the CommandStart is going to quickly decide to stop. To do that, the message it displays needs to be displayed in the worker thread, after the CommandStart has run. Also, the change will mean that CommandStart will no longer necessarily run with the same Annex state as CommandPerform. While its docs already said it should avoid modifying Annex state, I audited all the CommandStart code as part of the conversion. (Note that CommandSeek already sometimes runs with a different Annex state, and that has not been a source of any problems, so I am not too worried that this change will lead to breakage going forward.) The only modification of Annex state I found was it calling allowMessages in some Commands that default to noMessages. Dealt with that by adding a startCustomOutput and a startingUsualMessages. This lets a command start with noMessages and then select the output it wants for each CommandStart. One bit of breakage: onlyActionOn has been removed from commands that used it. The plan is that, since a StartMessage contains an ActionItem, when a Key can be extracted from that, the parallel job runner can run onlyActionOn' automatically. Then commands won't need to worry about this detail. Future work. Otherwise, this was a fairly straightforward process of making each CommandStart compile again. Hopefully other behavior changes were mostly avoided. In a few cases, a command had a CommandStart that called a CommandPerform that then called showStart multiple times. I have collapsed those down to a single start action. The main command to perhaps suffer from it is Command.Direct, which used to show a start for each file, and no longer does. Another minor behavior change is that some commands used showStart before, but had an associated file and a Key available, so were changed to ShowStart with an ActionItemAssociatedFile. That will not change the normal output or behavior, but --json output will now include the key. This should not break it for anyone using a real json parser.
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mkActionItem (file, key) = mkActionItem (key, file)
instance MkActionItem Key where
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mkActionItem = ActionItemKey
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instance MkActionItem (BranchFilePath, Key) where
mkActionItem = uncurry ActionItemBranchFilePath
instance MkActionItem (Transfer, TransferInfo) where
mkActionItem = uncurry ActionItemFailedTransfer
instance MkActionItem MatchInfo where
mkActionItem (MatchingFile i) = ActionItemTreeFile (matchFile i)
mkActionItem (MatchingInfo i) = case providedFilePath i of
Just f -> ActionItemTreeFile f
Nothing -> case providedKey i of
Just k -> ActionItemKey k
Nothing -> ActionItemOther Nothing
mkActionItem (MatchingUserInfo _) = ActionItemOther Nothing
actionItemDesc :: ActionItem -> StringContainingQuotedPath
actionItemDesc (ActionItemAssociatedFile (AssociatedFile (Just f)) _) =
QuotedPath f
actionItemDesc (ActionItemAssociatedFile (AssociatedFile Nothing) k) =
UnquotedByteString (serializeKey' k)
actionItemDesc (ActionItemKey k) =
UnquotedByteString (serializeKey' k)
actionItemDesc (ActionItemBranchFilePath bfp _) =
descBranchFilePath bfp
actionItemDesc (ActionItemFailedTransfer t i) = actionItemDesc $
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ActionItemAssociatedFile (associatedFile i) (transferKey t)
actionItemDesc (ActionItemTreeFile f) = QuotedPath f
actionItemDesc (ActionItemUUID _ desc) = desc
actionItemDesc (ActionItemOther Nothing) = mempty
actionItemDesc (ActionItemOther (Just v)) = v
actionItemDesc (OnlyActionOn _ ai) = actionItemDesc ai
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make CommandStart return a StartMessage The goal is to be able to run CommandStart in the main thread when -J is used, rather than unncessarily passing it off to a worker thread, which incurs overhead that is signficant when the CommandStart is going to quickly decide to stop. To do that, the message it displays needs to be displayed in the worker thread, after the CommandStart has run. Also, the change will mean that CommandStart will no longer necessarily run with the same Annex state as CommandPerform. While its docs already said it should avoid modifying Annex state, I audited all the CommandStart code as part of the conversion. (Note that CommandSeek already sometimes runs with a different Annex state, and that has not been a source of any problems, so I am not too worried that this change will lead to breakage going forward.) The only modification of Annex state I found was it calling allowMessages in some Commands that default to noMessages. Dealt with that by adding a startCustomOutput and a startingUsualMessages. This lets a command start with noMessages and then select the output it wants for each CommandStart. One bit of breakage: onlyActionOn has been removed from commands that used it. The plan is that, since a StartMessage contains an ActionItem, when a Key can be extracted from that, the parallel job runner can run onlyActionOn' automatically. Then commands won't need to worry about this detail. Future work. Otherwise, this was a fairly straightforward process of making each CommandStart compile again. Hopefully other behavior changes were mostly avoided. In a few cases, a command had a CommandStart that called a CommandPerform that then called showStart multiple times. I have collapsed those down to a single start action. The main command to perhaps suffer from it is Command.Direct, which used to show a start for each file, and no longer does. Another minor behavior change is that some commands used showStart before, but had an associated file and a Key available, so were changed to ShowStart with an ActionItemAssociatedFile. That will not change the normal output or behavior, but --json output will now include the key. This should not break it for anyone using a real json parser.
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actionItemKey :: ActionItem -> Maybe Key
actionItemKey (ActionItemAssociatedFile _ k) = Just k
actionItemKey (ActionItemKey k) = Just k
actionItemKey (ActionItemBranchFilePath _ k) = Just k
actionItemKey (ActionItemFailedTransfer t _) = Just (transferKey t)
actionItemKey (ActionItemTreeFile _) = Nothing
actionItemKey (ActionItemUUID _ _) = Nothing
make CommandStart return a StartMessage The goal is to be able to run CommandStart in the main thread when -J is used, rather than unncessarily passing it off to a worker thread, which incurs overhead that is signficant when the CommandStart is going to quickly decide to stop. To do that, the message it displays needs to be displayed in the worker thread, after the CommandStart has run. Also, the change will mean that CommandStart will no longer necessarily run with the same Annex state as CommandPerform. While its docs already said it should avoid modifying Annex state, I audited all the CommandStart code as part of the conversion. (Note that CommandSeek already sometimes runs with a different Annex state, and that has not been a source of any problems, so I am not too worried that this change will lead to breakage going forward.) The only modification of Annex state I found was it calling allowMessages in some Commands that default to noMessages. Dealt with that by adding a startCustomOutput and a startingUsualMessages. This lets a command start with noMessages and then select the output it wants for each CommandStart. One bit of breakage: onlyActionOn has been removed from commands that used it. The plan is that, since a StartMessage contains an ActionItem, when a Key can be extracted from that, the parallel job runner can run onlyActionOn' automatically. Then commands won't need to worry about this detail. Future work. Otherwise, this was a fairly straightforward process of making each CommandStart compile again. Hopefully other behavior changes were mostly avoided. In a few cases, a command had a CommandStart that called a CommandPerform that then called showStart multiple times. I have collapsed those down to a single start action. The main command to perhaps suffer from it is Command.Direct, which used to show a start for each file, and no longer does. Another minor behavior change is that some commands used showStart before, but had an associated file and a Key available, so were changed to ShowStart with an ActionItemAssociatedFile. That will not change the normal output or behavior, but --json output will now include the key. This should not break it for anyone using a real json parser.
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actionItemKey (ActionItemOther _) = Nothing
actionItemKey (OnlyActionOn _ ai) = actionItemKey ai
actionItemFile :: ActionItem -> Maybe RawFilePath
actionItemFile (ActionItemAssociatedFile (AssociatedFile af) _) = af
actionItemFile (ActionItemTreeFile f) = Just f
actionItemFile (ActionItemUUID _ _) = Nothing
actionItemFile (OnlyActionOn _ ai) = actionItemFile ai
actionItemFile _ = Nothing
actionItemUUID :: ActionItem -> Maybe UUID
actionItemUUID (ActionItemUUID uuid _) = Just uuid
actionItemUUID _ = Nothing
actionItemTransferDirection :: ActionItem -> Maybe Direction
actionItemTransferDirection (ActionItemFailedTransfer t _) = Just $
transferDirection t
actionItemTransferDirection (OnlyActionOn _ ai) = actionItemTransferDirection ai
actionItemTransferDirection _ = Nothing