blob: 13710fba2e66ff3b04b5ecf98096106f9cc4c8b7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
{- Types for Storer and Retriever actions for remotes.
-
- Copyright 2014 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Types.StoreRetrieve where
import Common.Annex
import Utility.Metered
import qualified Data.ByteString.Lazy as L
-- Prepares for and then runs an action that will act on a Key's
-- content, passing it a helper when the preparation is successful.
type Preparer helper = Key -> (Maybe helper -> Annex Bool) -> Annex Bool
-- A source of a Key's content.
data ContentSource
= FileContent FilePath
| ByteContent L.ByteString
isByteContent :: ContentSource -> Bool
isByteContent (ByteContent _) = True
isByteContent (FileContent _) = False
-- Action that stores a Key's content on a remote.
-- Can throw exceptions.
type Storer = Key -> ContentSource -> MeterUpdate -> Annex Bool
-- Action that retrieves a Key's content from a remote, passing it to a
-- callback, which will fully consume the content before returning.
-- Throws exception if key is not present, or remote is not accessible.
type Retriever = Key -> MeterUpdate -> (ContentSource -> Annex Bool) -> Annex Bool
-- Action that removes a Key's content from a remote.
-- Succeeds if key is already not present; never throws exceptions.
type Remover = Key -> Annex Bool
-- Checks if a Key's content is present on a remote.
-- Throws an exception if the remote is not accessible.
type CheckPresent = Key -> Annex Bool
|
