feat: Support retry failure policy for event based functions (#247)

Co-authored-by: Flavio Peralta <flaperalta8@google.com>

Author: flaviomp

package/googlePackage.js

@@ -31,6 +31,15 @@ class GooglePackage {
         resource: {
           type: 'string',
         },
+        failurePolicy: {
+          type: 'object',
+          properties: {
+            retry: {
+              type: 'object',
+            },
+          },
+          additionalProperties: false,
+        },
       },
       required: ['eventType', 'resource'],
       additionalProperties: false,

package/lib/compileFunctions.js

@@ -83,11 +83,17 @@ module.exports = {
         const type = funcObject.events[0].event.eventType;
         const path = funcObject.events[0].event.path; //eslint-disable-line
         const resource = funcObject.events[0].event.resource;
+        const failurePolicy = funcObject.events[0].event.failurePolicy;
+        const retry = _.get(funcObject.events[0].event, 'failurePolicy.retry');
 
         funcTemplate.properties.eventTrigger = {};
         funcTemplate.properties.eventTrigger.eventType = type;
         if (path) funcTemplate.properties.eventTrigger.path = path;
         funcTemplate.properties.eventTrigger.resource = resource;
+        if (failurePolicy) {
+          funcTemplate.properties.eventTrigger.failurePolicy = {};
+          funcTemplate.properties.eventTrigger.failurePolicy.retry = retry;
+        }
       }
 
       this.serverless.service.provider.compiledConfigurationTemplate.resources.push(funcTemplate);