king: Handle replacement events correctly (dont try to parse them).

pkg/hs/urbit-king/lib/Urbit/Vere/Pier.hs

@@ -26,10 +26,12 @@ import Urbit.Arvo
 import Urbit.King.Config
 import Urbit.Vere.Pier.Types
 import Control.Monad.Trans.Maybe
+import Data.Conduit
 
 import Data.Text              (append)
 import System.Posix.Files     (ownerModes, setFileMode)
 import Urbit.King.App         (HasConfigDir(..), HasStderrLogFunc(..))
+import Urbit.Time             (Wen)
 import Urbit.Vere.Ames        (ames)
 import Urbit.Vere.Behn        (behn)
 import Urbit.Vere.Clay        (clay)
@@ -37,7 +39,6 @@ import Urbit.Vere.Http.Client (client)
 import Urbit.Vere.Http.Server (serv)
 import Urbit.Vere.Log         (EventLog)
 import Urbit.Vere.Serf        (Serf, SerfState(..))
-import Data.Conduit
 
 import qualified System.Entropy         as Ent
 import qualified Urbit.King.API         as King
@@ -127,21 +128,6 @@ bootSeqJobs now (BootSeq ident nocks ovums) = zipWith ($) bootSeqFns [1 ..]
     muckNock nok eId = RunNok $ LifeCyc eId 0 nok
     muckOvum ov eId = DoWork $ Work eId 0 (wen eId) ov
 
-{-
-    loop :: [Job] -> SerfState -> Maybe (ProgressBar ()) -> [BootSeqFn]
-         -> RIO e ([Job], SerfState)
-    loop acc ss pb = \case
-        []   -> do
-          pb        <- logStderr (updateProgressBar 0 bootMsg pb)
-          pure (reverse acc, ss)
-        x:xs -> do
-          wen       <- io Time.now
-          job       <- pure $ x (ssNextEv ss) (ssLastMug ss) wen
-          pb        <- logStderr (updateProgressBar (1 + length xs) bootMsg pb)
-          (job, ss) <- bootJob serf job
-          loop (job:acc) ss pb xs
--}
-
 bootNewShip
   :: (HasPierConfig e, HasStderrLogFunc e, HasLogFunc e)
   => Pill
@@ -223,6 +209,9 @@ getSnapshot top last = do
 acquireWorker :: RIO e () -> RAcquire e (Async ())
 acquireWorker act = mkRAcquire (async act) cancel
 
+acquireWorkerBound :: RIO e () -> RAcquire e (Async ())
+acquireWorkerBound act = mkRAcquire (asyncBound act) cancel
+
 pier :: ∀e. (HasConfigDir e, HasLogFunc e, HasNetworkConfig e, HasPierConfig e)
      => (Serf, EventLog)
      -> TVar (Text -> IO ())
@@ -235,7 +224,7 @@ pier (serf, log) vStderr mStart = do
     saveM     <- newEmptyTMVarIO
     shutdownM <- newEmptyTMVarIO
 
-    kapi ← King.kingAPI
+    kapi <- King.kingAPI
 
     termApiQ <- atomically $ do
         q <- newTQueue
@@ -317,15 +306,15 @@ pier (serf, log) vStderr mStart = do
 death :: Text -> Async () -> STM (Either (Text, SomeException) Text)
 death tag tid = do
   waitCatchSTM tid <&> \case
-    Left exn -> Left (tag, exn)
+    Left  exn -> Left (tag, exn)
-    Right () -> Right tag
+    Right ()  -> Right tag
 
 saveSignalThread :: TMVar () -> RAcquire e (Async ())
 saveSignalThread tm = mkRAcquire start cancel
-  where
+ where
-    start = async $ forever $ do
+  start = async $ forever $ do
-      threadDelay (120 * 1000000) -- 120 seconds
+    threadDelay (120 * 1000000) -- 120 seconds
-      atomically $ putTMVar tm ()
+    atomically $ putTMVar tm ()
 
 
 -- Start All Drivers -----------------------------------------------------------
@@ -427,10 +416,10 @@ runCompute
   -> STM ()
   -> (Maybe Text -> STM ())
   -> STM ()
-  -> ((Job, FX) -> STM ())
+  -> ((Fact, FX) -> STM ())
   -> RAcquire e (Async ())
 runCompute serf getEvent getSaveSignal getShutdownSignal showSpinner hideSpinner putResult = do
-  mkRAcquire (async $ newRunCompute serf config) cancel
+  acquireWorker (newRunCompute serf config)
  where
   config = ComputeConfig
     { ccOnWork = getEvent
@@ -441,17 +430,6 @@ runCompute serf getEvent getSaveSignal getShutdownSignal showSpinner hideSpinner
     , ccHideSpinner = hideSpinner
     }
 
--- data RunOutput = RunOutput EventId Mug Wen (Either Noun Ev) [Ef]
--- data Work = Work EventId Mug Wen Ev
-
-{-
-data ComputeRequest
-    = CREvent Ev (Serf.RunError -> IO ())
-    | CRSave ()
-    | CRShutdown ()
-  deriving (Eq, Show)
--}
-
 {-
   TODO Pack and Peek
 -}
@@ -486,11 +464,18 @@ fromRightErr :: Either a b -> IO b
 fromRightErr (Left l) = error "unexpected Left value"
 fromRightErr (Right r) = pure r
 
+data Fact = Fact
+  { factEve :: EventId
+  , factMug :: Mug
+  , factWen :: Wen
+  , factNon :: Noun
+  }
+
 data ComputeConfig = ComputeConfig
   { ccOnWork :: STM (Ev, Serf.RunError -> IO ())
   , ccOnKill :: STM ()
   , ccOnSave :: STM ()
-  , ccPutResult :: (Job, FX) -> STM ()
+  , ccPutResult :: (Fact, FX) -> STM ()
   , ccShowSpinner :: Maybe Text -> STM ()
   , ccHideSpinner :: STM ()
   }
@@ -509,9 +494,7 @@ newRunCompute serf ComputeConfig {..} = do
     Nothing                               -> pure ()
     Just (Serf.RunOutput e m w nounEv fx) -> do
       lift $ logTrace "newRunCompute: Got play result"
-      ev <- io $ fromRightErr nounEv -- TODO
+      atomically $ ccPutResult (Fact e m w nounEv, GoodParse <$> fx) -- TODO GoodParse
-      let job :: Job = DoWork $ Work e m w ev
-      atomically (ccPutResult ((job, GoodParse <$> fx))) -- TODO GoodParse
       sendResults
 
   onStatusChange :: Maybe Serf.RunInput -> STM ()
@@ -521,24 +504,6 @@ newRunCompute serf ComputeConfig {..} = do
     _                        -> pure ()
 
 
-{-
-  FIND ME
-
-  send event
-    push event
-  start spinner
-    hook for when event starts running
-    hook for when no event is running
-  send another event
-  first event is done
-    push to persistQ
-  update spinner to event #2
-  second event is done
-    push to executeQ
-  remove spinner
--}
-
-
 -- Persist Thread --------------------------------------------------------------
 
 data PersistExn = BadEventId EventId EventId
@@ -550,43 +515,38 @@ instance Exception PersistExn where
             , "\tExpected " <> show expected <> " but got " <> show got
             ]
 
-runPersist :: ∀e. (HasPierConfig e, HasLogFunc e)
+runPersist
-           => EventLog
+  :: forall e
-           -> TQueue (Job, FX)
+   . (HasPierConfig e, HasLogFunc e)
-           -> (FX -> STM ())
+  => EventLog
-           -> RAcquire e (Async ())
+  -> TQueue (Fact, FX)
-runPersist log inpQ out =
+  -> (FX -> STM ())
-    mkRAcquire runThread cancel
+  -> RAcquire e (Async ())
-  where
+runPersist log inpQ out = mkRAcquire runThread cancel
-    runThread :: RIO e (Async ())
+ where
-    runThread = asyncBound $ do
+  runThread :: RIO e (Async ())
-        dryRun <- view dryRunL
+  runThread = asyncBound $ do
-        forever $ do
+    dryRun <- view dryRunL
-            writs  <- atomically getBatchFromQueue
+    forever $ do
-            unless dryRun $ do
+      writs  <- atomically getBatchFromQueue
-                events <- validateJobsAndGetBytes (toNullable writs)
+      events <- validateFactsAndGetBytes (fst <$> toNullable writs)
-                Log.appendEvents log events
+      unless dryRun (Log.appendEvents log events)
-            atomically $ for_ writs $ \(_,fx) -> out fx
+      atomically $ for_ writs $ \(_, fx) -> do
+        out fx
 
-    validateJobsAndGetBytes :: [(Job, FX)] -> RIO e (Vector ByteString)
+  validateFactsAndGetBytes :: [Fact] -> RIO e (Vector ByteString)
-    validateJobsAndGetBytes writs = do
+  validateFactsAndGetBytes facts = do
-        expect <- Log.nextEv log
+    expect <- Log.nextEv log
-        fmap fromList
+    lis <- for (zip [expect ..] facts) $ \(expectedId, Fact eve mug wen non) ->
-            $ for (zip [expect..] writs)
+      do
-            $ \(expectedId, (j, fx)) -> do
+        unless (expectedId == eve) $ do
-                unless (expectedId == jobId j) $
+          throwIO (BadEventId expectedId eve)
-                    throwIO (BadEventId expectedId (jobId j))
+        pure $ jamBS $ toNoun (mug, wen, non)
-                case j of
+    pure (fromList lis)
-                  RunNok _ ->
-                      error "This shouldn't happen here!"
-                  DoWork (Work eId mug wen ev) ->
-                      pure $ jamBS $ toNoun (mug, wen, ev)
 
-    getBatchFromQueue :: STM (NonNull [(Job, FX)])
+  getBatchFromQueue :: STM (NonNull [(Fact, FX)])
-    getBatchFromQueue =
+  getBatchFromQueue = readTQueue inpQ >>= go . singleton
-        readTQueue inpQ >>= go . singleton
+   where
-      where
+    go acc = tryReadTQueue inpQ >>= \case
-        go acc =
+      Nothing   -> pure (reverse acc)
-          tryReadTQueue inpQ >>= \case
+      Just item -> go (item <| acc)
-            Nothing   -> pure (reverse acc)
-            Just item -> go (item <| acc)

pkg/hs/urbit-king/lib/Urbit/Vere/Serf/IPC.hs

@@ -167,7 +167,7 @@ data RunInput
   | RunPeek Wen Gang Path (Maybe (Term, Noun) -> IO ())
   | RunWork Ev (RunError -> IO ())
 
-data RunOutput = RunOutput EventId Mug Wen (Either Noun Ev) [Ef]
+data RunOutput = RunOutput EventId Mug Wen Noun [Ef]
 
 
 -- Exceptions ------------------------------------------------------------------
@@ -432,11 +432,11 @@ running serf notice = do
         io (sendWrit serf (WWork wen evn))
         io (recvWork serf) >>= \case
           WDone eid hash fx -> do
-            yield (RunOutput eid hash wen (Right evn) fx)
+            yield (RunOutput eid hash wen (toNoun evn) fx)
             loop hash eid
           WSwap eid hash (wen, noun) fx -> do
             io $ err (RunSwap eid hash wen noun fx)
-            yield (RunOutput eid hash wen (Left noun) fx)
+            yield (RunOutput eid hash wen noun fx)
             loop hash eid
           WBail goofs -> do
             io $ err (RunBail goofs)