mirror of https://github.com/voidlizard/hbs2
440 lines
13 KiB
Haskell
440 lines
13 KiB
Haskell
{-# Language ViewPatterns #-}
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{-# Language PatternSynonyms #-}
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{-# Language RecordWildCards #-}
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module Main where
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import HBS2.Prelude.Plated
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import HBS2.OrDie
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import HBS2.Storage
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import HBS2.Peer.CLI.Detect
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import HBS2.Peer.RPC.Client
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import HBS2.Peer.RPC.Client.Unix
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import HBS2.Peer.RPC.API.Peer
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import HBS2.Peer.RPC.API.RefLog
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import HBS2.Peer.RPC.API.RefChan
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import HBS2.Peer.RPC.API.LWWRef
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import HBS2.Peer.RPC.API.Storage
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import HBS2.Peer.RPC.Client.StorageClient
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import HBS2.Git.Local
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import HBS2.Git.Local.CLI
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import HBS2.System.Logger.Simple.ANSI as Exported
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import HBS2.System.Dir
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import HBS2.Misc.PrettyStuff as Exported
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import Data.Config.Suckless.Script
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-- import Codec.Compression.GZip as GZ1
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-- import Codec.Compression.Zlib.Internal qualified as GZ
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import Codec.Compression.BZip as BZ1
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import Codec.Compression.BZip.Internal qualified as BZ
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-- import Codec.Compression.Zlib.Internal qualified as GZ
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import Data.Maybe
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import Data.List qualified as L
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import Data.ByteString.Lazy.Char8 qualified as LBS8
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import Data.ByteString.Lazy qualified as LBS
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import Data.ByteString qualified as BS
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import Data.ByteString.Lazy (ByteString)
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import Text.InterpolatedString.Perl6 (qc)
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import Data.HashSet qualified as HS
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import Data.HashSet (HashSet(..))
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import Data.HashMap.Strict qualified as HM
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import Data.Word
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import Streaming.Prelude qualified as S
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import System.Exit qualified as Q
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import System.Environment qualified as E
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import System.Process.Typed
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import Control.Monad.Trans.Cont
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import Control.Monad.Reader
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import System.IO (hPrint,hGetLine,IOMode(..))
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import System.IO qualified as IO
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import Data.Kind
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import Data.List (sortOn)
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import Data.Ord (Down(..))
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import UnliftIO
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{- HLINT ignore "Functor law" -}
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{- HLINT ignore "Eta reduce" -}
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type HBS2GitPerks m = (MonadUnliftIO m)
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quit :: MonadUnliftIO m => m ()
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quit = liftIO Q.exitSuccess
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data GitException =
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CompressionError String
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| InvalidObjectFormat GitObjectType (Maybe GitHash)
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| InvalidGitPack ByteString
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| OtherGitError String
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deriving stock (Eq,Show,Typeable,Generic)
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instance Exception GitException
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data GitTreeEntry =
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GitTreeEntry
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{ gitEntryAttribs :: Word16
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, gitEntryType :: GitObjectType
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, gitEntryHash :: GitHash
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, gitEntrySize :: Maybe Word32
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, gitEntryName :: FilePath
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}
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pattern GitTreeEntryView :: GitTreeEntry -> [ByteString]
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pattern GitTreeEntryView e <- (isGitLsTreeEntry -> Just e)
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isGitLsTreeEntry :: [ByteString] -> Maybe GitTreeEntry
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isGitLsTreeEntry = \case
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[sa,st,sh,ss,sn] -> do
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GitTreeEntry <$> readMay @Word16 (LBS8.unpack sa)
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<*> fromStringMay (LBS8.unpack st)
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<*> fromStringMay (LBS8.unpack sh)
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<*> pure (readMay (LBS8.unpack ss))
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<*> pure (LBS8.unpack sn)
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_ -> Nothing
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gitReadTree :: (Pretty what, MonadIO m) => what -> m [GitTreeEntry]
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gitReadTree what =
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gitRunCommand [qc|git ls-tree -t -l -r {pretty what}|]
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>>= orThrowPassIO
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<&> fmap LBS8.words . LBS8.lines
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<&> mapMaybe \case
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GitTreeEntryView v -> do
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Just v
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_ -> Nothing
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<&> \s -> HM.elems (HM.fromList [ (gitEntryHash e, e) | e <- s])
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gitReadObjectThrow :: (Pretty h, MonadIO m) => GitObjectType -> h -> m ByteString
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gitReadObjectThrow t h = do
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gitRunCommand [qc|git cat-file {pretty t} {pretty h}|]
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>>= orThrowPassIO
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gitRevParse :: (Pretty ref, MonadIO m) => ref -> m (Maybe GitHash)
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gitRevParse ref = do
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gitRunCommand [qc|git rev-parse {pretty ref}|]
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>>= orThrowPassIO
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<&> LBS8.words
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<&> maybe Nothing (fromStringMay . LBS8.unpack) . headMay
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withGitCat :: (MonadIO m) => (Process Handle Handle () -> m a) -> m a
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withGitCat action = do
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let cmd = "git"
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let args = ["cat-file", "--batch"]
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let config = setStdin createPipe $ setStdout createPipe $ setStderr closed $ proc cmd args
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p <- startProcess config
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action p
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newtype Short x = Short x
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instance Pretty (Short GitObjectType) where
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pretty = \case
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(Short Tree) -> "T"
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(Short Blob) -> "B"
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(Short Commit) -> "C"
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sortGitTreeEntries :: [GitTreeEntry] -> [GitTreeEntry]
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sortGitTreeEntries = sortOn (\e -> (gitEntryType e, gitEntrySize e))
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class GitWritePacksOpts a where
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excludeParents :: a -> Bool
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instance GitWritePacksOpts () where
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excludeParents = const True
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data GitWritePacksOptVal =
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WriteFullPack
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deriving stock (Eq,Ord,Show,Generic)
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instance Hashable GitWritePacksOptVal
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instance GitWritePacksOpts (HashSet GitWritePacksOptVal) where
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excludeParents o = not $ HS.member WriteFullPack o
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data Git3Exception =
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Git3PeerNotConnected
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deriving (Show,Typeable,Generic)
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instance Exception Git3Exception
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data Git3Env =
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Git3Disconnected
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| Git3Connected
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{ peerSocket :: FilePath
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, peerAPI :: ServiceCaller PeerAPI UNIX
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}
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newtype Git3 (m :: Type -> Type) a = Git3M { fromGit3 :: ReaderT Git3Env m a }
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deriving newtype ( Applicative
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, Functor
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, Monad
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, MonadIO
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, MonadUnliftIO
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, MonadReader Git3Env
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)
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type Git3Perks m = ( MonadIO m
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, MonadUnliftIO m
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)
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instance MonadUnliftIO m => HasClientAPI PeerAPI UNIX (Git3 m) where
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getClientAPI = do
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ask >>= \case
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Git3Disconnected -> throwIO Git3PeerNotConnected
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Git3Connected{..} -> pure peerAPI
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instance (MonadUnliftIO m, HasClientAPI api proto m) => HasClientAPI api proto (RunM c m) where
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getClientAPI = lift (getClientAPI @api @proto)
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instance (MonadUnliftIO m, HasClientAPI api proto m) => HasClientAPI api proto (ContT a (RunM c m)) where
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getClientAPI = lift $ getClientAPI @api @proto
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nullGit3Env :: MonadIO m => m Git3Env
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nullGit3Env = pure Git3Disconnected
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withGit3Env :: Git3Perks m => Git3Env -> Git3 m a -> m a
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withGit3Env env a = runReaderT (fromGit3 a) env
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runGit3 :: Git3Perks m => Git3Env -> Git3 m b -> m b
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runGit3 env action = withGit3Env env action
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recover :: Git3 IO a -> Git3 IO a
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recover m = fix \again -> do
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catch m $ \case
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Git3PeerNotConnected -> do
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soname <- detectRPC
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`orDie` "can't locate hbs2-peer rpc"
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flip runContT pure do
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client <- lift $ race (pause @'Seconds 1) (newMessagingUnix False 1.0 soname)
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>>= orThrowUser ("can't connect to" <+> pretty soname)
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void $ ContT $ withAsync $ runMessagingUnix client
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peerAPI <- makeServiceCaller @PeerAPI (fromString soname)
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refLogAPI <- makeServiceCaller @RefLogAPI (fromString soname)
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storageAPI <- makeServiceCaller @StorageAPI (fromString soname)
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lwwAPI <- makeServiceCaller @LWWRefAPI (fromString soname)
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-- let sto = AnyStorage (StorageClient storageAPI)
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let endpoints = [ Endpoint @UNIX peerAPI
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, Endpoint @UNIX refLogAPI
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, Endpoint @UNIX lwwAPI
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, Endpoint @UNIX storageAPI
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]
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void $ ContT $ withAsync $ liftIO $ runReaderT (runServiceClientMulti endpoints) client
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let connected = Git3Connected soname peerAPI
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liftIO $ withGit3Env connected again
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gitWriteCommitPackIO :: (GitWritePacksOpts opt, Pretty what) => opt -> what -> ( BS.ByteString -> IO () ) -> IO ()
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gitWriteCommitPackIO opts what action = do
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hhead <- gitRevParse what >>= orThrow (OtherGitError $ show $ "can't parse" <+> pretty what)
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co <- gitReadObjectThrow Commit hhead
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<&> LBS8.lines
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<&> takeWhile ( not . LBS8.null )
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<&> LBS8.unpack . LBS8.unlines
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<&> parseTop
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>>= orThrow (OtherGitError "invalid commit format")
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let parents = [ fromStringMay @GitHash hash
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| ListVal [ StringLike "parent", StringLike hash ] <- co
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] & catMaybes
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-- debug $ "EXCLUDE PARENTS" <+> pretty (excludeParents opts)
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skip <- if not (excludeParents opts) then do
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pure mempty
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else do
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skip' <- S.toList_ $ for parents $ \p -> do
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gitReadTree p <&> fmap gitEntryHash >>= S.each
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pure $ HS.fromList skip'
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r <- gitReadTree hhead
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<&> L.filter (\GitTreeEntry{..} -> not (HS.member gitEntryHash skip))
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<&> sortGitTreeEntries
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flip runContT pure do
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ph <- ContT withGitCat
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let ssin = getStdin ph
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let ssout = getStdout ph
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inq <- newTQueueIO
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atomically do
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writeTQueue inq (Commit, hhead)
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for_ r $ \GitTreeEntry{..} -> do
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writeTQueue inq (gitEntryType, gitEntryHash)
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let params = defaultCompressParams
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let compressStream = BZ.compressIO params
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lift $ flip fix compressStream $ \go -> \case
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BZ.CompressInputRequired next -> do
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inO <- atomically $ tryReadTQueue inq
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case inO of
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Nothing -> go =<< next mempty
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Just (t,ha) -> do
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liftIO $ hPrint ssin $ pretty ha
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liftIO $ hFlush ssin
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s <- liftIO $ hGetLine ssout
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case words s of
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[_,_,s] -> do
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n <- readMay @Int s & orThrow (OtherGitError "git cat-file --batch error")
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co <- liftIO $ LBS.hGet ssout n
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void $ liftIO $ hGetLine ssout
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let header = [qc|{pretty (Short t)} {s} {pretty ha}|]
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go =<< next (LBS.toStrict (LBS8.intercalate "\n" [header, co]))
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e -> throwIO $ OtherGitError ("git cat-file --batch error: " <> show e)
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BZ.CompressOutputAvailable outchunk next -> do
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action outchunk
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go =<< next
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BZ.CompressStreamEnd -> pure ()
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data UState =
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UHead ByteString
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pattern PEntryView :: GitObjectType -> Word32 -> GitHash -> [ByteString]
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pattern PEntryView t s h <- ( unpackPEntry -> Just (t,s,h) )
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unpackPEntry :: [ByteString] -> Maybe (GitObjectType, Word32, GitHash)
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unpackPEntry = \case
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["C", s, h] -> (Commit,,) <$> readMay (LBS8.unpack s) <*> fromStringMay (LBS8.unpack h)
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["B", s, h] -> (Blob,,) <$> readMay (LBS8.unpack s) <*> fromStringMay (LBS8.unpack h)
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["T", s, h] -> (Tree,,) <$> readMay (LBS8.unpack s) <*> fromStringMay (LBS8.unpack h)
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_ -> Nothing
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theDict :: forall m . ( HBS2GitPerks m
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, HasClientAPI PeerAPI UNIX m
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) => Dict C m
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theDict = do
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makeDict @C do
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-- TODO: write-man-entries
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myHelpEntry
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where
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myHelpEntry = do
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entry $ bindMatch "--help" $ nil_ $ \case
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HelpEntryBound what -> do
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helpEntry what
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quit
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_ -> helpList False Nothing >> quit
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entry $ bindMatch "git:tree:ls" $ nil_ $ const do
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r <- gitReadTree "HEAD"
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for_ r $ \GitTreeEntry{..} -> do
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liftIO $ print $ pretty gitEntryHash <+> pretty gitEntryType <+> pretty gitEntrySize <+> pretty gitEntryName
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entry $ bindMatch "test:git:tree:pack:dump" $ nil_ $ \case
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[ StringLike fn ] -> do
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content <- BZ.decompress defaultDecompressParams <$> liftIO (LBS8.readFile fn)
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flip fix (UHead content) $ \next -> \case
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UHead "" -> none
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UHead bs -> do
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let (hd,rest) = LBS8.span (/='\n') bs
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case LBS8.words hd of
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PEntryView t s h -> do
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liftIO $ print $ pretty h <+> pretty t <+> pretty s
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next $ UHead (LBS8.drop (1 + fromIntegral s) rest)
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_ -> throwIO (InvalidGitPack hd)
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_ -> throwIO (BadFormException @C nil)
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entry $ bindMatch "test:hbs2:peer:poke" $ nil_ $ \syn -> do
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peer <- getClientAPI @PeerAPI @UNIX
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r <- callRpcWaitRetry @RpcPoke (TimeoutSec 0.5) 2 peer () >>= orThrowUser "hbs2-peer not found"
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notice $ pretty r
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entry $ bindMatch "test:git:tree:export" $ nil_ $ \syn -> flip runContT pure do
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pure ()
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entry $ bindMatch "test:git:tree:pack:write" $ nil_ $ \syn -> flip runContT pure do
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let o = [ WriteFullPack | StringLike "--full" <- syn ] & HS.fromList
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(what,to) <- case syn of
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( StringLike rev : StringLike fn : _) -> do
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-- let co = headDef "HEAD" $ [ GitRef (LBS8.toStrict $ LBS8.pack what) | StringLike what <- syn ]
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fh <- ContT $ bracket (liftIO (IO.openFile fn WriteMode)) hClose
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pure (rev, fh)
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( StringLike rev : _ ) -> pure ( rev, stdout )
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_ -> pure ( "HEAD", stdout )
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liftIO $ gitWriteCommitPackIO o what $ \bs -> do
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BS.hPut to bs
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-- debugPrefix :: LoggerEntry -> LoggerEntry
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debugPrefix = toStderr . logPrefix "[debug] "
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setupLogger :: MonadIO m => m ()
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setupLogger = do
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setLogging @DEBUG $ toStderr . logPrefix "[debug] "
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setLogging @ERROR $ toStderr . logPrefix "[error] "
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setLogging @WARN $ toStderr . logPrefix "[warn] "
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setLogging @NOTICE $ toStdout . logPrefix ""
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pure ()
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flushLoggers :: MonadIO m => m ()
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flushLoggers = do
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silence
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silence :: MonadIO m => m ()
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silence = do
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setLoggingOff @DEBUG
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setLoggingOff @ERROR
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setLoggingOff @WARN
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setLoggingOff @NOTICE
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main :: IO ()
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main = flip runContT pure do
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setupLogger
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ContT $ bracket none $ const do
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silence
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argz <- liftIO $ E.getArgs
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cli <- parseTop (unlines $ unwords <$> splitForms argz)
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& either (error.show) pure
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env <- nullGit3Env
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void $ lift $ withGit3Env env do
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let dict = theDict
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recover $ run dict cli
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