Add startup banner (#2354)

Same as all other nimbuses

nimbus/config.nim

@@ -28,7 +28,7 @@ import
   common/chain_config,
   db/opts
 
-export net
+export net, defs
 
 const
   # TODO: fix this agent-string format to match other

nimbus/nimbus.nim

@@ -208,6 +208,10 @@ proc run(nimbus: NimbusNode, conf: NimbusConf) =
     defaultChroniclesStream.output.outFile = nil # to avoid closing stdout
     discard defaultChroniclesStream.output.open(logFile, fmAppend)
 
+  info "Launching execution client",
+      version = FullVersionStr,
+      conf
+
   when defined(evmc_enabled):
     evmcSetLibraryPath(conf.evm)
 

nimbus/version.nim

@@ -60,3 +60,5 @@ const
   GitRevisionBytes* = hexToByteArray[4](GitRevision)
 
   NimVersion* = "Nim version " & $NimMajor & "." & $NimMinor & "." & $NimPatch
+
+  FullVersionStr* = "v" & NimbusVersion & "-" & GitRevision