Integrate nim-prompt

.gitmodules

@@ -121,3 +121,13 @@
 	url = https://github.com/arnetheduck/nim-result.git
 	ignore = dirty
 	branch = master
+[submodule "vendor/nim-prompt"]
+	path = vendor/nim-prompt
+	url = https://github.com/status-im/nim-prompt.git
+	ignore = dirty
+	branch = master
+[submodule "vendor/nim-unicodedb"]
+	path = vendor/nim-unicodedb
+	url = https://github.com/nitely/nim-unicodedb.git
+	ignore = dirty
+	branch = master

beacon_chain.nimble

@@ -29,6 +29,7 @@ requires "nim >= 0.19.0",
   "nimcrypto",
   "serialization",
   "stew",
+  "prompt",
   "web3",
   "yaml"
 

beacon_chain/beacon_node.nim

@@ -1,9 +1,14 @@
 import
+  # Standard library
   net, sequtils, tables, osproc, random, strutils, times, strformat,
+
+  # Nimble packages
   stew/shims/os, stew/[objects, bitseqs],
   chronos, chronicles, confutils, metrics,
   json_serialization/std/[options, sets], serialization/errors,
   eth/trie/db, eth/trie/backends/rocksdb_backend, eth/async_utils,
+
+  # Local modules
   spec/[datatypes, digest, crypto, beaconstate, helpers, validator,
   state_transition_block, network],
   conf, time, state_transition, fork_choice, ssz, beacon_chain_db,
@@ -16,6 +21,7 @@ const
   networkMetadataFile = "network.json"
   genesisFile = "genesis.json"
   testnetsBaseUrl = "https://serenity-testnets.status.im"
+  hasPrompt = not defined(withoutPrompt)
 
 declareGauge beacon_slot, "Latest slot of the beacon chain state"
 declareGauge beacon_head_slot, "Slot of the head block of the beacon chain"
@@ -825,6 +831,32 @@ proc start(node: BeaconNode, headState: BeaconState) =
   node.addLocalValidators(headState)
   node.run()
 
+when hasPrompt:
+  from unicode import Rune
+  import terminal, prompt
+
+  proc providePromptCompletions*(line: seq[Rune], cursorPos: int): seq[string] =
+    # TODO
+    # The completions should be generated with the general-purpose command-line
+    # parsing API of Confutils
+    result = @[]
+
+  proc initPrompt(node: BeaconNode) =
+    doAssert defaultChroniclesStream.outputs.len > 0
+    doAssert defaultChroniclesStream.output is DynamicOutput
+
+    if isatty(stdout):
+      var p = Prompt.init("nimbus > ", providePromptCompletions)
+      p.useHistoryFile()
+
+      defaultChroniclesStream.output.writer =
+        proc (logLevel: LogLevel, msg: LogOutputStr) {.gcsafe.} =
+          p.writeLine(msg)
+    else:
+      defaultChroniclesStream.output.writer =
+        proc (logLevel: LogLevel, msg: LogOutputStr) {.gcsafe.} =
+          stdout.writeLine(msg)
+
 when isMainModule:
   randomize()
   let config = BeaconNodeConf.load(version = fullVersionStr())
@@ -855,7 +887,6 @@ when isMainModule:
         stderr.write "Please regenerate the deposit files by running makeDeposits again\n"
         quit 1
 
-
     var
       startTime = uint64(times.toUnix(times.getTime()) + config.genesisOffset)
       initialState = initialize_beacon_state_from_eth1(
@@ -933,6 +964,7 @@ when isMainModule:
     createPidFile(config.dataDir.string / "beacon_node.pid")
 
     var node = waitFor BeaconNode.init(config)
+    when hasPrompt: initPrompt(node)
 
     # TODO slightly ugly to rely on node.stateCache state here..
     if node.nickname != "":

docker/Dockerfile

@@ -47,7 +47,7 @@ RUN cd nim-beacon-chain \
       -d:"SLOTS_PER_EPOCH=${SLOTS_PER_EPOCH}" \
       -d:"SECONDS_PER_SLOT=${SECONDS_PER_SLOT}" \
       -d:"chronicles_log_level=DEBUG" \
-      -d:"chronicles_sinks=json" \
+      -d:"testnet_docker_node" \
       c beacon_chain/beacon_node.nim
 
 # --------------------------------- #

nim.cfg

@@ -13,6 +13,13 @@
   --tlsEmulation:off
 @end
 
+@if testnet_docker_node:
+  -d:"chronicles_sinks=json"
+  -d:"withoutPrompt"
+@else:
+  -d:"chronicles_default_output_device=dynamic"
+@end
+
 --threads:on
 --opt:speed
 --excessiveStackTrace:on

vendor/nim-chronicles

@@ -1 +1 @@
-Subproject commit 743f14cf68f213a0cbead5e6dfc00ee3edc7fe1e
+Subproject commit a2ea339569878720571bbadabdde72b55c411d78

vendor/nim-prompt

@@ -0,0 +1 @@
+Subproject commit b0ea27c34ca7aaee42333541f37b182fa239c844

vendor/nim-stew

@@ -1 +1 @@
-Subproject commit 5f1dc751ca436e599c59df939344a641f935dd4d
+Subproject commit 2bdd2fab6e9bdcdcb51ea7e09d077f36a29faf4c

vendor/nim-unicodedb

@@ -0,0 +1 @@
+Subproject commit 2afc384ae17d4bd30078164fbfc2356b06d1a7f4