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|
{- git-annex command
-
- Copyright 2012 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE CPP #-}
module Command.Log where
import qualified Data.Set as S
import qualified Data.Map as M
import qualified Data.ByteString.Lazy.Char8 as L
import Data.Char
import Data.Time.Clock.POSIX
import Data.Time
#if ! MIN_VERSION_time(1,5,0)
import System.Locale
#endif
import Common.Annex
import Command
import Logs
import qualified Logs.Presence
import Annex.CatFile
import qualified Annex.Branch
import qualified Git
import Git.Command
import qualified Remote
import qualified Annex
data RefChange = RefChange
{ changetime :: POSIXTime
, oldref :: Git.Ref
, newref :: Git.Ref
}
type Outputter = Bool -> POSIXTime -> [UUID] -> Annex ()
cmd :: Command
cmd = withGlobalOptions annexedMatchingOptions $
command "log" SectionQuery "shows location log"
paramPaths (seek <$$> optParser)
data LogOptions = LogOptions
{ logFiles :: CmdParams
, gourceOption :: Bool
, passthruOptions :: [CommandParam]
}
optParser :: CmdParamsDesc -> Parser LogOptions
optParser desc = LogOptions
<$> cmdParams desc
<*> switch
( long "gource"
<> help "format output for gource"
)
<*> (concat <$> many passthru)
where
passthru :: Parser [CommandParam]
passthru = datepassthru "since"
<|> datepassthru "after"
<|> datepassthru "until"
<|> datepassthru "before"
<|> (mkpassthru "max-count" <$> strOption
( long "max-count" <> metavar paramNumber
<> help "limit number of logs displayed"
))
datepassthru n = mkpassthru n <$> strOption
( long n <> metavar paramDate
<> help ("show log " ++ n ++ " date")
)
mkpassthru n v = [Param ("--" ++ n), Param v]
seek :: LogOptions -> CommandSeek
seek o = do
m <- Remote.uuidDescriptions
zone <- liftIO getCurrentTimeZone
withFilesInGit (whenAnnexed $ start m zone o) (logFiles o)
start
:: M.Map UUID String
-> TimeZone
-> LogOptions
-> FilePath
-> Key
-> CommandStart
start m zone o file key = do
showLog output =<< readLog <$> getLog key (passthruOptions o)
-- getLog produces a zombie; reap it
liftIO reapZombies
stop
where
output
| (gourceOption o) = gourceOutput lookupdescription file
| otherwise = normalOutput lookupdescription file zone
lookupdescription u = fromMaybe (fromUUID u) $ M.lookup u m
showLog :: Outputter -> [RefChange] -> Annex ()
showLog outputter ps = do
sets <- mapM (getset newref) ps
previous <- maybe (return genesis) (getset oldref) (lastMaybe ps)
sequence_ $ compareChanges outputter $ sets ++ [previous]
where
genesis = (0, S.empty)
getset select change = do
s <- S.fromList <$> get (select change)
return (changetime change, s)
get ref = map toUUID . Logs.Presence.getLog . L.unpack <$>
catObject ref
normalOutput :: (UUID -> String) -> FilePath -> TimeZone -> Outputter
normalOutput lookupdescription file zone present ts us =
liftIO $ mapM_ (putStrLn . format) us
where
time = showTimeStamp zone ts
addel = if present then "+" else "-"
format u = unwords [ addel, time, file, "|",
fromUUID u ++ " -- " ++ lookupdescription u ]
gourceOutput :: (UUID -> String) -> FilePath -> Outputter
gourceOutput lookupdescription file present ts us =
liftIO $ mapM_ (putStrLn . intercalate "|" . format) us
where
time = takeWhile isDigit $ show ts
addel = if present then "A" else "M"
format u = [ time, lookupdescription u, addel, file ]
{- Generates a display of the changes (which are ordered with newest first),
- by comparing each change with the previous change.
- Uses a formatter to generate a display of items that are added and
- removed. -}
compareChanges :: Ord a => (Bool -> POSIXTime -> [a] -> b) -> [(POSIXTime, S.Set a)] -> [b]
compareChanges format changes = concatMap diff $ zip changes (drop 1 changes)
where
diff ((ts, new), (_, old)) =
[format True ts added, format False ts removed]
where
added = S.toList $ S.difference new old
removed = S.toList $ S.difference old new
{- Gets the git log for a given location log file.
-
- This is complicated by git log using paths relative to the current
- directory, even when looking at files in a different branch. A wacky
- relative path to the log file has to be used.
-
- The --remove-empty is a significant optimisation. It relies on location
- log files never being deleted in normal operation. Letting git stop
- once the location log file is gone avoids it checking all the way back
- to commit 0 to see if it used to exist, so generally speeds things up a
- *lot* for newish files. -}
getLog :: Key -> [CommandParam] -> Annex [String]
getLog key os = do
top <- fromRepo Git.repoPath
p <- liftIO $ relPathCwdToFile top
config <- Annex.getGitConfig
let logfile = p </> locationLogFile config key
inRepo $ pipeNullSplitZombie $
[ Param "log"
, Param "-z"
, Param "--pretty=format:%ct"
, Param "--raw"
, Param "--abbrev=40"
, Param "--remove-empty"
] ++ os ++
[ Param $ Git.fromRef Annex.Branch.fullname
, Param "--"
, Param logfile
]
readLog :: [String] -> [RefChange]
readLog = mapMaybe (parse . lines)
where
parse (ts:raw:[]) = let (old, new) = parseRaw raw in
Just RefChange
{ changetime = parseTimeStamp ts
, oldref = old
, newref = new
}
parse _ = Nothing
-- Parses something like ":100644 100644 oldsha newsha M"
parseRaw :: String -> (Git.Ref, Git.Ref)
parseRaw l = go $ words l
where
go (_:_:oldsha:newsha:_) = (Git.Ref oldsha, Git.Ref newsha)
go _ = error $ "unable to parse git log output: " ++ l
parseTimeStamp :: String -> POSIXTime
parseTimeStamp = utcTimeToPOSIXSeconds . fromMaybe (error "bad timestamp") .
#if MIN_VERSION_time(1,5,0)
parseTimeM True defaultTimeLocale "%s"
#else
parseTime defaultTimeLocale "%s"
#endif
showTimeStamp :: TimeZone -> POSIXTime -> String
showTimeStamp zone = show . utcToLocalTime zone . posixSecondsToUTCTime
|
