Add mechanism to determine when a node has finished booting

multinode-demo/fullnode.sh

@@ -21,7 +21,7 @@ usage() {
     echo
   fi
   cat <<EOF
-usage: $0 [-x] [--no-leader-rotation] [--rpc-port port] [rsync network path to bootstrap leader configuration] [network entry point]
+usage: $0 [-x] [--no-leader-rotation] [--init-complete-file FILE] [--rpc-port port] [rsync network path to bootstrap leader configuration] [network entry point]
 
 Start a full node on the specified network
 
@@ -29,6 +29,7 @@ Start a full node on the specified network
   -X [label]            - start or restart a dynamically-configured full node with
                           the specified label
   --no-leader-rotation  - disable leader rotation
+  --init-complete-file FILE - create this file, if it doesn't already exist, once node initialization is complete
   --rpc-port port       - custom RPC port for this node
 
 EOF
@@ -39,29 +40,34 @@ if [[ $1 = -h ]]; then
   usage
 fi
 
-if [[ $1 = -X ]]; then
-  self_setup=1
-  self_setup_label=$2
-  shift 2
-elif [[ $1 = -x ]]; then
-  self_setup=1
-  self_setup_label=$$
-  shift
-else
-  self_setup=0
-fi
-
+maybe_init_complete_file=
 maybe_no_leader_rotation=
-if [[ $1 = --no-leader-rotation ]]; then
-  maybe_no_leader_rotation="--no-leader-rotation"
-  shift
-fi
-
+self_setup=0
 maybe_rpc_port=
-if [[ $1 = --rpc-port ]]; then
-  maybe_rpc_port="$1 $2"
-  shift 2
-fi
+
+while [[ ${1:0:1} = - ]]; do
+  if [[ $1 = -X ]]; then
+    self_setup=1
+    self_setup_label=$2
+    shift 2
+  elif [[ $1 = -x ]]; then
+    self_setup=1
+    self_setup_label=$$
+    shift
+  elif [[ $1 = --init-complete-file ]]; then
+    maybe_init_complete_file="--init-complete-file $2"
+    shift 2
+  elif [[ $1 = --no-leader-rotation ]]; then
+    maybe_no_leader_rotation="--no-leader-rotation"
+    shift
+  elif [[ $1 = --rpc-port ]]; then
+    maybe_rpc_port="$1 $2"
+    shift 2
+  else
+    echo "Unknown argument: $1"
+    exit 1
+  fi
+done
 
 if [[ -d $SNAP ]]; then
   if [[ $(snapctl get leader-rotation) = false ]]; then
@@ -230,8 +236,9 @@ if [[ ! -d "$ledger_config_dir" ]]; then
 fi
 
 trap 'kill "$pid" && wait "$pid"' INT TERM
-# shellcheck disable=SC2086 # Don't want to double quote # maybe_rpc_port
+# shellcheck disable=SC2086 # Don't want to double quote maybe_rpc_port or maybe_init_complete_file
 $program \
+  $maybe_init_complete_file \
   $maybe_no_leader_rotation \
   $maybe_rpc_port \
   --identity "$fullnode_json_path" \