wait for rabbitmq b4 start

Author: vdvibhu20

package.json

@@ -47,7 +47,7 @@
     "build": "tsc",
     "apidoc": "apidoc -i src -o docs",
     "prestart": "npm run build",
-    "start": "cross-env NODE_PATH=dist node dist/run.js",
+    "start": "cross-env NODE_PATH=dist ./wait-for-it.sh ${AMQP_HOST}:${AMQP_PORT} -- node dist/run.js",
     "test": "cross-env NODE_PATH=src NODE_ENV=test mocha --timeout 12000 --exit --require ts-node/register test/utils/setup*.ts test/unit/validators/*.ts test/e2e/*.ts",
     "cover": "nyc npm test",
     "seedlangs": "node dist/scripts/seed-defaultlangs.js",

wait-for-it.sh

@@ -0,0 +1,73 @@
+#!/bin/sh
+# shellcheck shell=dash
+
+#
+# Waits for the given host(s) to be available via TCP before executing a given
+# command.
+#
+# Usage: ./wait.sh [-t timeout] host:port [host:port] [...] [-- command args...]
+#
+# It accepts a number of `host:port` combinations to connect to via netcat.
+# The command to execute after each host is reachable can be supplied after the
+# `--` argument.
+# The default timeout of 10 seconds can be changed via `-t timeout` argument.
+#
+# Copyright 2016, Sebastian Tschan
+# https://blueimp.net
+#
+# Licensed under the MIT license:
+# https://opensource.org/licenses/MIT
+#
+
+set -e
+
+TIMEOUT=10
+
+is_integer() {
+  test "$1" -eq "$1" 2> /dev/null
+}
+
+connect_to_service() {
+  nc -w 1 -z "$1" "$2"
+}
+
+wait_for_service() {
+  local host="${1%:*}"
+  local port="${1#*:}"
+  local output
+  if ! is_integer "$port"; then
+    printf 'Error: "%s" is not a valid host:port combination.\n' "$1" >&2
+    return 1
+  fi
+  printf 'Waiting for %s to become available ... ' "$1" >&2
+  # shellcheck disable=SC2155
+  local timeout=$(($(date +%s)+TIMEOUT))
+  while ! output="$(connect_to_service "$host" "$port" 2>&1)"; do
+    if [ "$(date +%s)" -gt "$timeout" ]; then
+      echo 'timeout' >&2
+      if [ ! -z "$output" ]; then
+        echo "$output" >&2
+      fi
+      return 1
+    fi
+    sleep 1
+  done
+  echo 'done' >&2
+}
+
+while [ $# != 0 ]; do
+  if [ "$1" = '-t' ] || [ "$1" = '--timeout' ]; then
+    if ! is_integer "$2"; then
+      printf 'Error: "%s" is not a timeout integer.\n' "$2" >&2
+      exit 1
+    fi
+    TIMEOUT="$2"
+    shift 2
+  fi
+  if [ "$1" = '--' ]; then
+    shift
+    exec "$@"
+  fi
+  wait_for_service "$1"
+  shift
+done