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|
{- git-annex command
-
- Copyright 2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.Vicfg where
import qualified Data.Map as M
import qualified Data.Set as S
import System.Environment (getEnv)
import Data.Tuple (swap)
import Data.Char (isSpace)
import Common.Annex
import Command
import Annex.Perms
import Types.TrustLevel
import Types.Group
import Logs.Trust
import Logs.Group
import Logs.PreferredContent
import Logs.Schedule
import Types.StandardGroups
import Types.ScheduledActivity
import Remote
def :: [Command]
def = [command "vicfg" paramNothing seek
SectionSetup "edit git-annex's configuration"]
seek :: [CommandSeek]
seek = [withNothing start]
start :: CommandStart
start = do
f <- fromRepo gitAnnexTmpCfgFile
createAnnexDirectory $ parentDir f
cfg <- getCfg
descs <- uuidDescriptions
liftIO $ writeFile f $ genCfg cfg descs
vicfg cfg f
stop
vicfg :: Cfg -> FilePath -> Annex ()
vicfg curcfg f = do
vi <- liftIO $ catchDefaultIO "vi" $ getEnv "EDITOR"
-- Allow EDITOR to be processed by the shell, so it can contain options.
unlessM (liftIO $ boolSystem "sh" [Param "-c", Param $ unwords [vi, shellEscape f]]) $
error $ vi ++ " exited nonzero; aborting"
r <- parseCfg curcfg <$> liftIO (readFileStrict f)
liftIO $ nukeFile f
case r of
Left s -> do
liftIO $ writeFile f s
vicfg curcfg f
Right newcfg -> setCfg curcfg newcfg
data Cfg = Cfg
{ cfgTrustMap :: TrustMap
, cfgGroupMap :: M.Map UUID (S.Set Group)
, cfgPreferredContentMap :: M.Map UUID String
, cfgScheduleMap :: M.Map UUID [ScheduledActivity]
}
getCfg :: Annex Cfg
getCfg = Cfg
<$> trustMapRaw -- without local trust overrides
<*> (groupsByUUID <$> groupMap)
<*> preferredContentMapRaw
<*> scheduleMap
setCfg :: Cfg -> Cfg -> Annex ()
setCfg curcfg newcfg = do
let (trustchanges, groupchanges, preferredcontentchanges, schedulechanges) = diffCfg curcfg newcfg
mapM_ (uncurry trustSet) $ M.toList trustchanges
mapM_ (uncurry groupSet) $ M.toList groupchanges
mapM_ (uncurry preferredContentSet) $ M.toList preferredcontentchanges
mapM_ (uncurry scheduleSet) $ M.toList schedulechanges
diffCfg :: Cfg -> Cfg -> (TrustMap, M.Map UUID (S.Set Group), M.Map UUID String, M.Map UUID [ScheduledActivity])
diffCfg curcfg newcfg = (diff cfgTrustMap, diff cfgGroupMap, diff cfgPreferredContentMap, diff cfgScheduleMap)
where
diff f = M.differenceWith (\x y -> if x == y then Nothing else Just x)
(f newcfg) (f curcfg)
genCfg :: Cfg -> M.Map UUID String -> String
genCfg cfg descs = unlines $ concat
[intro, trust, groups, preferredcontent, schedule]
where
intro =
[ com "git-annex configuration"
, com ""
, com "Changes saved to this file will be recorded in the git-annex branch."
, com ""
, com "Lines in this file have the format:"
, com " setting uuid = value"
]
trust = settings cfgTrustMap
[ ""
, com "Repository trust configuration"
, com "(Valid trust levels: " ++ trustlevels ++ ")"
]
(\(t, u) -> line "trust" u $ showTrustLevel t)
(\u -> lcom $ line "trust" u $ showTrustLevel SemiTrusted)
where
trustlevels = unwords $ map showTrustLevel [Trusted .. DeadTrusted]
groups = settings cfgGroupMap
[ ""
, com "Repository groups"
, com $ "(Standard groups: " ++ grouplist ++ ")"
, com "(Separate group names with spaces)"
]
(\(s, u) -> line "group" u $ unwords $ S.toList s)
(\u -> lcom $ line "group" u "")
where
grouplist = unwords $ map fromStandardGroup [minBound..]
preferredcontent = settings cfgPreferredContentMap
[ ""
, com "Repository preferred contents"
]
(\(s, u) -> line "content" u s)
(\u -> line "content" u "")
schedule = settings cfgScheduleMap
[ ""
, com "Scheduled activities"
, com "(Separate multiple activities with \"; \")"
]
(\(l, u) -> line "schedule" u $ fromScheduledActivities l)
(\u -> line "schedule" u "")
settings field desc showvals showdefaults = concat
[ desc
, concatMap showvals $ sort $ map swap $ M.toList $ field cfg
, concatMap (lcom . showdefaults) $ missing field
]
line setting u value =
[ com $ "(for " ++ fromMaybe "" (M.lookup u descs) ++ ")"
, unwords [setting, fromUUID u, "=", value]
]
lcom = map (\l -> if "#" `isPrefixOf` l then l else '#' : l)
missing field = S.toList $ M.keysSet descs `S.difference` M.keysSet (field cfg)
{- If there's a parse error, returns a new version of the file,
- with the problem lines noted. -}
parseCfg :: Cfg -> String -> Either String Cfg
parseCfg curcfg = go [] curcfg . lines
where
go c cfg []
| null (mapMaybe fst c) = Right cfg
| otherwise = Left $ unlines $
badheader ++ concatMap showerr (reverse c)
go c cfg (l:ls) = case parse (dropWhile isSpace l) cfg of
Left msg -> go ((Just msg, l):c) cfg ls
Right cfg' -> go ((Nothing, l):c) cfg' ls
parse l cfg
| null l = Right cfg
| "#" `isPrefixOf` l = Right cfg
| null setting || null u = Left "missing repository uuid"
| otherwise = handle cfg (toUUID u) setting value'
where
(setting, rest) = separate isSpace l
(r, value) = separate (== '=') rest
value' = trimspace value
u = reverse $ trimspace $ reverse $ trimspace r
trimspace = dropWhile isSpace
handle cfg u setting value
| setting == "trust" = case readTrustLevel value of
Nothing -> badval "trust value" value
Just t ->
let m = M.insert u t (cfgTrustMap cfg)
in Right $ cfg { cfgTrustMap = m }
| setting == "group" =
let m = M.insert u (S.fromList $ words value) (cfgGroupMap cfg)
in Right $ cfg { cfgGroupMap = m }
| setting == "content" =
case checkPreferredContentExpression value of
Just e -> Left e
Nothing ->
let m = M.insert u value (cfgPreferredContentMap cfg)
in Right $ cfg { cfgPreferredContentMap = m }
| setting == "schedule" = case parseScheduledActivities value of
Left e -> Left e
Right l ->
let m = M.insert u l (cfgScheduleMap cfg)
in Right $ cfg { cfgScheduleMap = m }
| otherwise = badval "setting" setting
showerr (Just msg, l) = [parseerr ++ msg, l]
showerr (Nothing, l)
-- filter out the header and parse error lines
-- from any previous parse failure
| any (`isPrefixOf` l) (parseerr:badheader) = []
| otherwise = [l]
badval desc val = Left $ "unknown " ++ desc ++ " \"" ++ val ++ "\""
badheader =
[ com "There was a problem parsing your input."
, com "Search for \"Parse error\" to find the bad lines."
, com "Either fix the bad lines, or delete them (to discard your changes)."
]
parseerr = com "Parse error in next line: "
com :: String -> String
com s = "# " ++ s
|
