298 lines
9.5 KiB
Haskell
298 lines
9.5 KiB
Haskell
{- git-annex command
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-
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- Copyright 2012-2014 Joey Hess <id@joeyh.name>
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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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{-# LANGUAGE RankNTypes #-}
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module Command.Vicfg where
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import qualified Data.Map as M
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import qualified Data.Set as S
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import System.Environment (getEnv)
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import Data.Tuple (swap)
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import Data.Char (isSpace)
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import Data.Default
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import Common.Annex
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import Command
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import Annex.Perms
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import Types.TrustLevel
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import Types.Group
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import Logs.Trust
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import Logs.Group
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import Logs.PreferredContent
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import Logs.Schedule
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import Types.StandardGroups
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import Types.ScheduledActivity
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import Remote
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cmd :: [Command]
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cmd = [command "vicfg" paramNothing seek
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SectionSetup "edit git-annex's configuration"]
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seek :: CommandSeek
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seek = withNothing start
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start :: CommandStart
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start = do
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f <- fromRepo gitAnnexTmpCfgFile
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createAnnexDirectory $ parentDir f
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cfg <- getCfg
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descs <- uuidDescriptions
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liftIO $ writeFileAnyEncoding f $ genCfg cfg descs
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vicfg cfg f
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stop
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vicfg :: Cfg -> FilePath -> Annex ()
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vicfg curcfg f = do
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vi <- liftIO $ catchDefaultIO "vi" $ getEnv "EDITOR"
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-- Allow EDITOR to be processed by the shell, so it can contain options.
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unlessM (liftIO $ boolSystem "sh" [Param "-c", Param $ unwords [vi, shellEscape f]]) $
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error $ vi ++ " exited nonzero; aborting"
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r <- parseCfg (defCfg curcfg) <$> liftIO (readFileStrictAnyEncoding f)
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liftIO $ nukeFile f
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case r of
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Left s -> do
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liftIO $ writeFileAnyEncoding f s
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vicfg curcfg f
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Right newcfg -> setCfg curcfg newcfg
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data Cfg = Cfg
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{ cfgTrustMap :: TrustMap
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, cfgGroupMap :: M.Map UUID (S.Set Group)
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, cfgPreferredContentMap :: M.Map UUID PreferredContentExpression
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, cfgRequiredContentMap :: M.Map UUID PreferredContentExpression
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, cfgGroupPreferredContentMap :: M.Map Group PreferredContentExpression
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, cfgScheduleMap :: M.Map UUID [ScheduledActivity]
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}
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getCfg :: Annex Cfg
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getCfg = Cfg
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<$> trustMapRaw -- without local trust overrides
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<*> (groupsByUUID <$> groupMap)
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<*> preferredContentMapRaw
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<*> requiredContentMapRaw
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<*> groupPreferredContentMapRaw
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<*> scheduleMap
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setCfg :: Cfg -> Cfg -> Annex ()
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setCfg curcfg newcfg = do
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let diff = diffCfg curcfg newcfg
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mapM_ (uncurry trustSet) $ M.toList $ cfgTrustMap diff
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mapM_ (uncurry groupSet) $ M.toList $ cfgGroupMap diff
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mapM_ (uncurry preferredContentSet) $ M.toList $ cfgPreferredContentMap diff
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mapM_ (uncurry requiredContentSet) $ M.toList $ cfgRequiredContentMap diff
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mapM_ (uncurry groupPreferredContentSet) $ M.toList $ cfgGroupPreferredContentMap diff
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mapM_ (uncurry scheduleSet) $ M.toList $ cfgScheduleMap diff
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{- Default config has all the keys from the input config, but with their
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- default values. -}
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defCfg :: Cfg -> Cfg
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defCfg curcfg = Cfg
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{ cfgTrustMap = mapdef $ cfgTrustMap curcfg
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, cfgGroupMap = mapdef $ cfgGroupMap curcfg
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, cfgPreferredContentMap = mapdef $ cfgPreferredContentMap curcfg
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, cfgRequiredContentMap = mapdef $ cfgRequiredContentMap curcfg
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, cfgGroupPreferredContentMap = mapdef $ cfgGroupPreferredContentMap curcfg
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, cfgScheduleMap = mapdef $ cfgScheduleMap curcfg
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}
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where
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mapdef :: forall k v. Default v => M.Map k v -> M.Map k v
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mapdef = M.map (const def)
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diffCfg :: Cfg -> Cfg -> Cfg
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diffCfg curcfg newcfg = Cfg
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{ cfgTrustMap = diff cfgTrustMap
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, cfgGroupMap = diff cfgGroupMap
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, cfgPreferredContentMap = diff cfgPreferredContentMap
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, cfgRequiredContentMap = diff cfgRequiredContentMap
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, cfgGroupPreferredContentMap = diff cfgGroupPreferredContentMap
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, cfgScheduleMap = diff cfgScheduleMap
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}
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where
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diff f = M.differenceWith (\x y -> if x == y then Nothing else Just x)
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(f newcfg) (f curcfg)
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genCfg :: Cfg -> M.Map UUID String -> String
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genCfg cfg descs = unlines $ intercalate [""]
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[ intro
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, trust
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, groups
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, preferredcontent
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, grouppreferredcontent
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, standardgroups
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, requiredcontent
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, schedule
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]
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where
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intro =
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[ com "git-annex configuration"
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, com ""
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, com "Changes saved to this file will be recorded in the git-annex branch."
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, com ""
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, com "Lines in this file have the format:"
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, com " setting field = value"
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]
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trust = settings cfg descs cfgTrustMap
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[ com "Repository trust configuration"
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, com "(Valid trust levels: " ++ trustlevels ++ ")"
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]
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(\(t, u) -> line "trust" u $ showTrustLevel t)
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(\u -> lcom $ line "trust" u $ showTrustLevel def)
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where
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trustlevels = unwords $ map showTrustLevel [Trusted .. DeadTrusted]
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groups = settings cfg descs cfgGroupMap
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[ com "Repository groups"
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, com $ "(Standard groups: " ++ grouplist ++ ")"
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, com "(Separate group names with spaces)"
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]
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(\(s, u) -> line "group" u $ unwords $ S.toList s)
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(\u -> lcom $ line "group" u "")
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where
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grouplist = unwords $ map fromStandardGroup [minBound..]
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preferredcontent = settings cfg descs cfgPreferredContentMap
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[ com "Repository preferred contents"
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, com "(Set to \"standard\" to use a repository's group's preferred contents)"
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]
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(\(s, u) -> line "wanted" u s)
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(\u -> line "wanted" u "")
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requiredcontent = settings cfg descs cfgRequiredContentMap
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[ com "Repository required contents" ]
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(\(s, u) -> line "required" u s)
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(\u -> line "required" u "")
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grouppreferredcontent = settings' cfg allgroups cfgGroupPreferredContentMap
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[ com "Group preferred contents"
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, com "(Used by repositories with \"groupwanted\" in their preferred contents)"
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]
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(\(s, g) -> gline g s)
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(\g -> gline g "")
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where
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gline g value = [ unwords ["groupwanted", g, "=", value] ]
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allgroups = S.unions $ stdgroups : M.elems (cfgGroupMap cfg)
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stdgroups = S.fromList $ map fromStandardGroup [minBound..maxBound]
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standardgroups =
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[ com "Standard preferred contents"
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, com "(Used by wanted or groupwanted expressions containing \"standard\")"
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, com "(For reference only; built-in and cannot be changed!)"
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]
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++ map gline [minBound..maxBound]
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where
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gline g = com $ unwords
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[ "standard"
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, fromStandardGroup g, "=", standardPreferredContent g
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]
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schedule = settings cfg descs cfgScheduleMap
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[ com "Scheduled activities"
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, com "(Separate multiple activities with \"; \")"
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]
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(\(l, u) -> line "schedule" u $ fromScheduledActivities l)
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(\u -> line "schedule" u "")
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line setting u value =
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[ com $ "(for " ++ fromMaybe "" (M.lookup u descs) ++ ")"
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, unwords [setting, fromUUID u, "=", value]
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]
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settings :: Ord v => Cfg -> M.Map UUID String -> (Cfg -> M.Map UUID v) -> [String] -> ((v, UUID) -> [String]) -> (UUID -> [String]) -> [String]
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settings cfg descs = settings' cfg (M.keysSet descs)
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settings' :: (Ord v, Ord f) => Cfg -> S.Set f -> (Cfg -> M.Map f v) -> [String] -> ((v, f) -> [String]) -> (f -> [String]) -> [String]
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settings' cfg s field desc showvals showdefaults = concat
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[ desc
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, concatMap showvals $ sort $ map swap $ M.toList $ field cfg
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, concatMap (lcom . showdefaults) missing
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]
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where
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missing = S.toList $ s `S.difference` M.keysSet (field cfg)
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lcom :: [String] -> [String]
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lcom = map (\l -> if "#" `isPrefixOf` l then l else '#' : l)
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{- If there's a parse error, returns a new version of the file,
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- with the problem lines noted. -}
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parseCfg :: Cfg -> String -> Either String Cfg
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parseCfg defcfg = go [] defcfg . lines
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where
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go c cfg []
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| null (mapMaybe fst c) = Right cfg
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| otherwise = Left $ unlines $
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badheader ++ concatMap showerr (reverse c)
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go c cfg (l:ls) = case parse (dropWhile isSpace l) cfg of
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Left msg -> go ((Just msg, l):c) cfg ls
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Right cfg' -> go ((Nothing, l):c) cfg' ls
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parse l cfg
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| null l = Right cfg
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| "#" `isPrefixOf` l = Right cfg
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| null setting || null f = Left "missing field"
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| otherwise = parsed cfg f setting value'
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where
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(setting, rest) = separate isSpace l
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(r, value) = separate (== '=') rest
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value' = trimspace value
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f = reverse $ trimspace $ reverse $ trimspace r
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trimspace = dropWhile isSpace
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parsed cfg f setting value
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| setting == "trust" = case readTrustLevel value of
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Nothing -> badval "trust value" value
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Just t ->
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let m = M.insert u t (cfgTrustMap cfg)
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in Right $ cfg { cfgTrustMap = m }
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| setting == "group" =
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let m = M.insert u (S.fromList $ words value) (cfgGroupMap cfg)
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in Right $ cfg { cfgGroupMap = m }
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| setting == "wanted" =
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case checkPreferredContentExpression value of
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Just e -> Left e
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Nothing ->
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let m = M.insert u value (cfgPreferredContentMap cfg)
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in Right $ cfg { cfgPreferredContentMap = m }
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| setting == "required" =
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case checkPreferredContentExpression value of
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Just e -> Left e
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Nothing ->
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let m = M.insert u value (cfgRequiredContentMap cfg)
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in Right $ cfg { cfgRequiredContentMap = m }
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| setting == "groupwanted" =
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case checkPreferredContentExpression value of
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Just e -> Left e
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Nothing ->
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let m = M.insert f value (cfgGroupPreferredContentMap cfg)
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in Right $ cfg { cfgGroupPreferredContentMap = m }
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| setting == "schedule" = case parseScheduledActivities value of
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Left e -> Left e
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Right l ->
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let m = M.insert u l (cfgScheduleMap cfg)
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in Right $ cfg { cfgScheduleMap = m }
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| otherwise = badval "setting" setting
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where
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u = toUUID f
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showerr (Just msg, l) = [parseerr ++ msg, l]
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showerr (Nothing, l)
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-- filter out the header and parse error lines
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-- from any previous parse failure
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| any (`isPrefixOf` l) (parseerr:badheader) = []
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| otherwise = [l]
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badval desc val = Left $ "unknown " ++ desc ++ " \"" ++ val ++ "\""
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badheader =
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[ com "** There was a problem parsing your input!"
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, com "** Search for \"Parse error\" to find the bad lines."
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, com "** Either fix the bad lines, or delete them (to discard your changes)."
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]
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parseerr = com "** Parse error in next line: "
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com :: String -> String
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com s = "# " ++ s
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