100 lines
4.2 KiB
Haskell
100 lines
4.2 KiB
Haskell
{- git-annex standard repository groups
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-
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- Copyright 2012 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 Types.StandardGroups where
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import Types.Remote (RemoteConfig)
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import qualified Data.Map as M
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import Data.Maybe
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type PreferredContentExpression = String
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data StandardGroup
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= ClientGroup
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| TransferGroup
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| BackupGroup
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| IncrementalBackupGroup
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| SmallArchiveGroup
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| FullArchiveGroup
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| SourceGroup
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| ManualGroup
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| PublicGroup
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| UnwantedGroup
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deriving (Eq, Ord, Enum, Bounded, Show)
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fromStandardGroup :: StandardGroup -> String
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fromStandardGroup ClientGroup = "client"
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fromStandardGroup TransferGroup = "transfer"
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fromStandardGroup BackupGroup = "backup"
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fromStandardGroup IncrementalBackupGroup = "incrementalbackup"
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fromStandardGroup SmallArchiveGroup = "smallarchive"
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fromStandardGroup FullArchiveGroup = "archive"
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fromStandardGroup SourceGroup = "source"
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fromStandardGroup ManualGroup = "manual"
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fromStandardGroup PublicGroup = "public"
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fromStandardGroup UnwantedGroup = "unwanted"
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toStandardGroup :: String -> Maybe StandardGroup
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toStandardGroup "client" = Just ClientGroup
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toStandardGroup "transfer" = Just TransferGroup
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toStandardGroup "backup" = Just BackupGroup
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toStandardGroup "incrementalbackup" = Just IncrementalBackupGroup
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toStandardGroup "smallarchive" = Just SmallArchiveGroup
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toStandardGroup "archive" = Just FullArchiveGroup
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toStandardGroup "source" = Just SourceGroup
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toStandardGroup "manual" = Just ManualGroup
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toStandardGroup "public" = Just PublicGroup
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toStandardGroup "unwanted" = Just UnwantedGroup
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toStandardGroup _ = Nothing
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descStandardGroup :: StandardGroup -> String
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descStandardGroup ClientGroup = "client: a repository on your computer"
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descStandardGroup TransferGroup = "transfer: distributes files to clients"
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descStandardGroup BackupGroup = "full backup: backs up all files"
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descStandardGroup IncrementalBackupGroup = "incremental backup: backs up files not backed up elsewhere"
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descStandardGroup SmallArchiveGroup = "small archive: archives files located in \"archive\" directories"
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descStandardGroup FullArchiveGroup = "full archive: archives all files not archived elsewhere"
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descStandardGroup SourceGroup = "file source: moves files on to other repositories"
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descStandardGroup ManualGroup = "manual mode: only stores files you manually choose"
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descStandardGroup UnwantedGroup = "unwanted: remove content from this repository"
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descStandardGroup PublicGroup = "public: publishes files located in an associated directory"
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associatedDirectory :: Maybe RemoteConfig -> StandardGroup -> Maybe FilePath
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associatedDirectory _ SmallArchiveGroup = Just "archive"
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associatedDirectory _ FullArchiveGroup = Just "archive"
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associatedDirectory (Just c) PublicGroup = Just $
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fromMaybe "public" $ M.lookup "preferreddir" c
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associatedDirectory Nothing PublicGroup = Just "public"
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associatedDirectory _ _ = Nothing
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{- See doc/preferred_content.mdwn for explanations of these expressions. -}
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preferredContent :: StandardGroup -> PreferredContentExpression
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preferredContent ClientGroup = lastResort $
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"((exclude=*/archive/* and exclude=archive/*) or (" ++ notArchived ++ ")) and not unused"
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preferredContent TransferGroup = lastResort $
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"not (inallgroup=client and copies=client:2) and (" ++ preferredContent ClientGroup ++ ")"
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preferredContent BackupGroup = "include=* or unused"
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preferredContent IncrementalBackupGroup = lastResort
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"(include=* or unused) and (not copies=incrementalbackup:1)"
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preferredContent SmallArchiveGroup = lastResort $
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"(include=*/archive/* or include=archive/*) and (" ++ preferredContent FullArchiveGroup ++ ")"
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preferredContent FullArchiveGroup = lastResort notArchived
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preferredContent SourceGroup = "not (copies=1)"
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preferredContent ManualGroup = "present and (" ++ preferredContent ClientGroup ++ ")"
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preferredContent PublicGroup = "inpreferreddir"
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preferredContent UnwantedGroup = "exclude=*"
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notArchived :: String
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notArchived = "not (copies=archive:1 or copies=smallarchive:1)"
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{- Most repositories want any content that is only on untrusted
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- or dead repositories, or that otherwise does not have enough copies.
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- Does not look at .gitattributes since that is quite a lot slower.
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-}
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lastResort :: String -> PreferredContentExpression
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lastResort s = "(" ++ s ++ ") or approxlackingcopies=1"
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