make chronosim work through patchFile

patchFile is not a perfect solution, e.g. needs some
handling of circular references, but seems to work
good enough

Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>

chronosim/chronos.nim

@@ -8,9 +8,11 @@
 
 import
   std/[tables, deques, random],
-  chronos,
   chronicles
 
+# we can't import chronos directly, as patchFile would create a loop
+import chronos/[asyncloop, asyncsync, handles, transport, timer, debugutils]
+
 logScope:
   topics = "ChronoSim"
 
@@ -20,10 +22,10 @@ const
 
 # chronos uses SomeIntegerI64. We shoudl be more specific here to override
 proc milliseconds*(v: int): Duration {.inline.} =
-  chronos.milliseconds(v * timeWarp)
+  timer.milliseconds(v * timeWarp)
 
 proc seconds*(v: int): Duration {.inline.} =
-  chronos.seconds(v * timeWarp)
+  timer.seconds(v * timeWarp)
 
 when(emulateDatagram): #enable network emulator
   type
@@ -111,4 +113,11 @@ export seconds, milliseconds
 export TransportAddress, initTAddress
 export async, sleepAsync, complete, await
 export Future, FutureBase, newFuture, futureContinue
-export TransportOsError
+export TransportOsError
+
+# export copied from chronos, except transport
+export asyncloop, asyncsync, handles, timer, debugutils
+
+# export copied chronos/transport except what we replace
+export common, stream, ipnet, osnet
+export asyncstream, chunkstream

das.nims

@@ -0,0 +1 @@
+patchFile("chronos", "chronos", "chronosim/chronos")

vendor/nim-libp2p-dht

@@ -1 +1 @@
-Subproject commit 3afc0063423aa6b38a247a7e8399d381cdcd6f7c
+Subproject commit 8b3d67688069784a5651a18f672e0b2ada74e3b7