Support invoking aws-lambda with layers

Fixes serverless-components#7

Author: ration

serverless.js

@@ -27,6 +27,7 @@ const outputsList = [
   'env',
   'role',
   'layer',
+  'layers',
   'arn',
   'region'
 ]
@@ -41,7 +42,8 @@ const defaults = {
   handler: 'handler.hello',
   runtime: 'nodejs10.x',
   env: {},
-  region: 'us-east-1'
+  region: 'us-east-1',
+  layers: []
 }
 
 class AwsLambda extends Component {

utils.js

@@ -1,3 +1,4 @@
+/* eslint-disable prettier/prettier */
 const { tmpdir } = require('os')
 const path = require('path')
 const archiver = require('archiver')
@@ -76,7 +77,8 @@ const createLambda = async ({
   zipPath,
   bucket,
   role,
-  layer
+  layer, // From autogenerated layer
+  layers // Manual layers
 }) => {
   const params = {
     FunctionName: name,
@@ -90,11 +92,13 @@ const createLambda = async ({
     Timeout: timeout,
     Environment: {
       Variables: env
-    }
+    },
+    Layers: layers
   }
 
+  
   if (layer && layer.arn) {
-    params.Layers = [layer.arn]
+    params.Layers = [layer.arn, ...layers]
   }
 
   if (bucket) {
@@ -119,7 +123,8 @@ const updateLambdaConfig = async ({
   env,
   description,
   role,
-  layer
+  layer, // From autogenerated layer
+  layers // Manual layers
 }) => {
   const functionConfigParams = {
     FunctionName: name,
@@ -131,11 +136,12 @@ const updateLambdaConfig = async ({
     Timeout: timeout,
     Environment: {
       Variables: env
-    }
+    },
+    Layers: layers
   }
 
   if (layer && layer.arn) {
-    functionConfigParams.Layers = [layer.arn]
+    functionConfigParams.Layers = [layer.arn, ...layers]
   }
 
   const res = await lambda.updateFunctionConfiguration(functionConfigParams).promise()