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|
{-# LANGUAGE ApplicativeDo #-}
{-# LANGUAGE RecordWildCards #-}
module Main where
import Data.Version (showVersion)
import Paths_git_auto_acp (version)
import Control.Concurrent
import Control.Monad
import Data.Foldable
import Data.Maybe
import qualified Data.Set as S
import Options.Applicative
import System.Clock
import System.Environment
import System.Exit
import System.FSNotify
import System.FSNotify.Devel
import System.FilePath
import System.IO
import System.Posix.Signals
import System.Process
data Watch = Watch
{ watchPath :: FilePath
, watchWithRemoval :: Bool
} deriving (Show, Eq, Ord)
data Opts = Opts
{ optAddCommitDelay :: Float
, optPushDelay :: Maybe Float
, optWatches :: [Watch]
, optMsg :: String
, optDebug :: Bool
} deriving (Show)
opts :: Parser Opts
opts = do
optAddCommitDelay <-
option auto
$ short 'd'
<> long "commit-delay"
<> help "debuounce delay for adding and commiting new changes"
<> value 5
<> showDefault
optPushDelay <-
asum
[ flag' Nothing
$ short 'L' <> long "local" <> help "only work locally, do not push"
, fmap Just . option auto
$ short 'D'
<> long "push-delay"
<> help "push changes upstream with this debuounce delay"
<> value 60
<> showDefault
]
optWatches <-
some
$ asum
[ fmap (`Watch` False) . strOption
$ short 'a'
<> long "add"
<> metavar "PATH"
<> help "paths to auto-add"
, fmap (`Watch` True) . strOption
$ short 'A'
<> long "add-all"
<> metavar "PATH"
<> help "like `--add' but also auto-adds file removals"
]
optMsg <-
strOption
$ short 'm'
<> long "message"
<> metavar "MSG"
<> help "commit message for auto-commits"
<> value "[auto-acs] update #%n"
<> showDefault
optDebug <-
flag' True (long "debug" <> help "be super verbose about what's happening")
<|> pure False
pure Opts {..}
delaySec :: Float -> IO ()
delaySec = threadDelay . round . (1000000 *)
intervalPassed :: (Ord a, Num a) => a -> TimeSpec -> TimeSpec -> Bool
intervalPassed i a b =
1000000000 * i <= fromIntegral (toNanoSecs $ diffTimeSpec a b)
runCmd :: String -> [String] -> IO ()
runCmd prog args = do
st <- rawSystem prog args
unless (st == ExitSuccess) . hPutStrLn stderr
$ prog ++ " failed with args " ++ show args
data Event
= AddBounce
| PushBounce
| Change Watch
| Finished
deriving (Show, Eq, Ord)
data St = St
{ stWatch :: S.Set Watch
, stLastAdd :: TimeSpec
, stAddsPending :: Int
, stLastPush :: TimeSpec
, stPushesPending :: Int
, stCommitSeries :: Int
} deriving (Show)
emptyState :: St
emptyState = St S.empty 0 0 0 0 1
mkMsg :: Int -> String -> String
mkMsg idx ('%':'n':cs) = show idx ++ mkMsg idx cs
mkMsg idx ('%':'%':cs) = '%' : mkMsg idx cs
mkMsg idx (c:cs) = c : mkMsg idx cs
mkMsg _ [] = []
main :: IO ()
main = do
o <-
customExecParser (prefs $ showHelpOnEmpty)
$ info
(opts <**> helper <**> simpleVersioner (showVersion version))
(fullDesc
<> header "git-auto-acp -- automatically add-commit-push files"
<> (footer
"This program is free software; see LICENSE file for details."))
let dbg
| optDebug o = hPutStrLn stderr . ("*** " ++)
| otherwise = const $ pure ()
git <- fromMaybe "git" <$> lookupEnv "AUTO_ACP_GIT"
dbg $ "using git: " ++ git
gitDir <- fromMaybe ".git" <$> lookupEnv "AUTO_ACP_GIT_DIRNAME"
dbg $ "filtering out git directory: " ++ gitDir
withManager $ \fsmgr -> do
chan <- newChan
done <- newEmptyMVar
installHandler sigINT (Catch $ writeChan chan Finished) Nothing
-- start some watchers
for_ (optWatches o) $ \w@(Watch path _) -> do
dbg $ "starting a watch: " ++ show w
watchTree fsmgr path (allEvents $ not . elem gitDir . splitDirectories) $ \ev -> do
dbg $ "fsnotify says: " ++ show ev
writeChan chan (Change w)
-- start the event crunching thread
let loop st@St {..} = do
ev <- readChan chan
dbg $ "processing event: " ++ show ev
now <- getTime Monotonic
case ev of
Finished -> putMVar done ()
Change w -> do
void . forkIO
$ delaySec (optAddCommitDelay o) >> writeChan chan AddBounce
let ws' = S.insert w stWatch
case optPushDelay o of
Nothing ->
loop st {stWatch = ws', stAddsPending = succ stAddsPending}
Just pd -> do
void . forkIO $ delaySec pd >> writeChan chan PushBounce
loop
st
{ stWatch = ws'
, stAddsPending = succ stAddsPending
, stPushesPending = succ stPushesPending
}
AddBounce -- TODO the last trigger looks nice but may cause double add, instead track an increasing token or such
| not (S.null stWatch)
, stAddsPending == 1
|| intervalPassed (optAddCommitDelay o) now stLastAdd -> do
for_ stWatch $ \w@(Watch p addAll) -> do
dbg $ "will add: " ++ show w
if addAll
then runCmd git ["add", p]
else runCmd git ["add", "--ignore-removal", p]
dbg "commit!"
runCmd
git
["commit", "--message", mkMsg stCommitSeries $ optMsg o]
loop
st
{ stWatch = S.empty
, stLastAdd = now
, stAddsPending = pred stAddsPending
, stCommitSeries = succ stCommitSeries
}
| otherwise ->
loop st {stWatch = S.empty, stAddsPending = pred stAddsPending}
PushBounce
| Just pd <- optPushDelay o
, stPushesPending == 1 || intervalPassed pd now stLastPush -> do
dbg $ "push!"
runCmd git ["push"]
loop
st
{ stWatch = S.empty
, stLastPush = now
, stPushesPending = pred stPushesPending
}
| otherwise ->
loop
st {stWatch = S.empty, stPushesPending = pred stPushesPending}
void . forkIO $ loop emptyState
-- wait for the finish, then terminate
takeMVar done
|
