Inititalize the handler as an extension

index.js

@@ -0,0 +1,78 @@
+const { createProbot } = require('probot-ts');
+const { resolve } = require('probot-ts/lib/resolver')
+const { findPrivateKey } = require('probot-ts/lib/private-key')
+const { template } = require('./views/probot')
+
+const loadProbot = (plugin) => {
+  const probot = createProbot({
+    id: process.env.APP_ID,
+    secret: process.env.WEBHOOK_SECRET,
+    cert: findPrivateKey()
+  })
+
+  if (typeof plugin === 'string') {
+    plugin = resolve(plugin)
+  }
+
+  probot.load(plugin)
+
+  return probot
+}
+
+
+module.exports.serverless = (plugin) => {
+
+  return (event, context, callback) => {
+
+    // 🤖 A friendly homepage if there isn't a payload
+    if (event.httpMethod === 'GET' && event.path === '/probot') {
+      const res = {
+        statusCode: 200,
+        headers: {
+          'Content-Type': 'text/html'
+        },
+        body: template
+      }
+      return callback(null, res)
+    }
+
+    // Otherwise let's listen handle the payload
+    const probot = loadProbot(plugin)
+
+    // Ends function immediately after callback
+    context.callbackWaitsForEmptyEventLoop = false
+
+    // Determine incoming webhook event type
+    const e = event.headers['x-github-event'] || event.headers['X-GitHub-Event']
+    const id = event.headers['x-github-delivery'] || event.headers['X-GitHub-Delivery']
+
+    // Convert the payload to an Object if API Gateway stringifies it
+    event.body = (typeof event.body === 'string') ? JSON.parse(event.body) : event.body
+
+    // Do the thing
+    console.log(`Received event ${e}${event.body.action ? ('.' + event.body.action) : ''}`)
+    if (event) {
+      try {
+        probot.receive({
+          event: e,
+          payload: event.body
+        }).then(() => {
+          const res = {
+            statusCode: 200,
+            body: JSON.stringify({
+              message: 'Executed'
+            })
+          }
+          return callback(null, res)
+        })
+      } catch (err) {
+        console.error(err)
+        callback(err)
+      }
+    } else {
+      console.error({ event, context })
+      callback('unknown error')
+    }
+  }
+
+}

package.json

@@ -2,8 +2,9 @@
   "name": "@probot/serverless-lambda",
   "version": "0.0.1",
   "description": "An extension for running Probot in AWS Lambda",
-  "main": "handler.js",
+  "main": "index.js",
   "scripts": {
+    "start": "probot run ./index.js",
     "test": "jest && standard"
   },
   "repository": {