86 lines
2.2 KiB
Haskell
86 lines
2.2 KiB
Haskell
{- git-annex remote log
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-
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- Copyright 2011 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 Logs.Remote (
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readRemoteLog,
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configSet,
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keyValToConfig,
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configToKeyVal,
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prop_idempotent_configEscape
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) where
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import qualified Data.Map as M
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import Data.Time.Clock.POSIX
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import Data.Char
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import Common.Annex
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import qualified Annex.Branch
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import Types.Remote
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import Logs.UUIDBased
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{- Filename of remote.log. -}
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remoteLog :: FilePath
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remoteLog = "remote.log"
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{- Adds or updates a remote's config in the log. -}
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configSet :: UUID -> RemoteConfig -> Annex ()
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configSet u c = do
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ts <- liftIO getPOSIXTime
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Annex.Branch.change remoteLog $
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showLog showConfig . changeLog ts u c . parseLog parseConfig
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{- Map of remotes by uuid containing key/value config maps. -}
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readRemoteLog :: Annex (M.Map UUID RemoteConfig)
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readRemoteLog = (simpleMap . parseLog parseConfig) <$> Annex.Branch.get remoteLog
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parseConfig :: String -> Maybe RemoteConfig
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parseConfig = Just . keyValToConfig . words
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showConfig :: RemoteConfig -> String
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showConfig = unwords . configToKeyVal
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{- Given Strings like "key=value", generates a RemoteConfig. -}
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keyValToConfig :: [String] -> RemoteConfig
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keyValToConfig ws = M.fromList $ map (/=/) ws
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where
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(/=/) s = (k, v)
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where
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k = takeWhile (/= '=') s
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v = configUnEscape $ drop (1 + length k) s
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configToKeyVal :: M.Map String String -> [String]
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configToKeyVal m = map toword $ sort $ M.toList m
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where
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toword (k, v) = k ++ "=" ++ configEscape v
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configEscape :: String -> String
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configEscape = (>>= escape)
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where
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escape c
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| isSpace c || c `elem` "&" = "&" ++ show (ord c) ++ ";"
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| otherwise = [c]
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configUnEscape :: String -> String
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configUnEscape = unescape
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where
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unescape [] = []
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unescape (c:rest)
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| c == '&' = entity rest
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| otherwise = c : unescape rest
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entity s = if ok
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then chr (Prelude.read num) : unescape rest
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else '&' : unescape s
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where
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num = takeWhile isNumber s
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r = drop (length num) s
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rest = drop 1 r
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ok = not (null num) && take 1 r == ";"
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{- for quickcheck -}
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prop_idempotent_configEscape :: String -> Bool
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prop_idempotent_configEscape s = s == (configUnEscape . configEscape) s
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