Merge pull request #1 from superandrew213/remove-bluebird-dependency

Remove bluebird dependency

README.md

@@ -18,7 +18,7 @@ He also mentioned that if you want to keep several concurrent functions warm, th
 
 You can read the key takeaways from his talk [here](https://www.jeremydaly.com/15-key-takeaways-from-the-serverless-talk-at-aws-startup-day/).
 
-Following these "best practices", I created **Lambda Warmer**. It is a lightweight module that can be added to your Lambda functions to manage "warming" events as well as handling automatic fan-out for initializing *concurrent functions*. Just instrument your code and schedule your CloudWatch Events.
+Following these "best practices", I created **Lambda Warmer**. It is a lightweight module (no dependencies) that can be added to your Lambda functions to manage "warming" events as well as handling automatic fan-out for initializing *concurrent functions*. Just instrument your code and schedule your CloudWatch Events.
 
 **NOTE:** Lambda Warmer will invoke the function multiple times using the AWS-SDK in order to scale concurrency (if you want to). Your functions MUST have `lambda:InvokeFunction` permissions so that they can invoke themselves. Following the Principle of Least Privilege, you should limit the `Resource` to the function itself, e.g.:
 
@@ -31,7 +31,7 @@ Following these "best practices", I created **Lambda Warmer**. It is a lightweig
 
 ## Installation
 
-Install Lambda Warmer from NPM as a project dependency. Lambda Warmer uses Bluebird as its only dependency to manage delays.
+Install Lambda Warmer from NPM as a project dependency.
 
 ```
 npm i lambda-warmer

index.js

@@ -7,15 +7,15 @@
  * @license MIT
  */
 
-const Promise = require('bluebird')
-
 const id = Date.now().toString() + '-' + ('0000' + Math.floor(Math.random()*1000).toString()).substr(-4)
 
 let warm = false
 let lastAccess = null
 
 const funcName = process.env.AWS_LAMBDA_FUNCTION_NAME
 
+const delay = ms => new Promise(res => setTimeout(res, ms))
+
 module.exports = (event,cfg = {}) => {
 
   let config = Object.assign({}, {
@@ -100,7 +100,7 @@ module.exports = (event,cfg = {}) => {
         .then((res) => true)
 
     } else if (invokeCount > 1) {
-      return Promise.delay(config.delay).then(() => true)
+      return delay(config.delay).then(() => true)
     }
 
     return Promise.resolve(true)

package.json

@@ -27,7 +27,6 @@
   },
   "homepage": "https://github.com/jeremydaly/lambda-warmer#readme",
   "dependencies": {
-    "bluebird": "^3.5.1"
   },
   "devDependencies": {
     "aws-sdk": "^2.273.1",