cfn mapping

packages/aws-cdk-lib/aws-s3-deployment/lib/render-data.ts

@@ -58,9 +58,9 @@ export function renderData(scope: Construct, data: string): Content {
     throw new ValidationError('Unexpected: Expecting `resolve()` to return "Fn::Join", "Ref" or "Fn::GetAtt"', scope);
   }
 
-  function addMarker(part: Ref | GetAtt | FnSelect) {
+  function addMarker(part: Ref | GetAtt | FnSelect |FnFindInMap) {
     const keys = Object.keys(part);
-    const acceptedCfnFns = ['Ref', 'Fn::GetAtt', 'Fn::Select'];
+    const acceptedCfnFns = ['Ref', 'Fn::GetAtt', 'Fn::Select','Fn::FindInMap'];
     if (keys.length !== 1 || !acceptedCfnFns.includes(keys[0])) {
       const stringifiedAcceptedCfnFns = acceptedCfnFns.map((fn) => `"${fn}"`).join(' or ');
       throw new ValidationError(`Invalid CloudFormation reference. Key must start with any of ${stringifiedAcceptedCfnFns}. Got ${JSON.stringify(part)}`, scope);
@@ -75,8 +75,9 @@ export function renderData(scope: Construct, data: string): Content {
 }
 
 type FnJoin = [string, FnJoinPart[]];
-type FnJoinPart = string | Ref | GetAtt | FnSelect;
+type FnJoinPart = string | Ref | GetAtt | FnSelect | FnFindInMap;
 type Ref = { Ref: string };
 type GetAtt = { 'Fn::GetAtt': [string, string] };
 type FnSplit = { 'Fn::Split': [string, string | Ref] };
 type FnSelect = { 'Fn::Select': [number, string[] | FnSplit] };
+type FnFindInMap = { 'Fn::FindInMap': [string, string, string] };

packages/aws-cdk-lib/aws-s3-deployment/test/content.test.ts

@@ -2,7 +2,8 @@ import { Vpc } from '../../aws-ec2';
 import * as elbv2 from '../../aws-elasticloadbalancingv2';
 import * as lambda from '../../aws-lambda';
 import * as s3 from '../../aws-s3';
-import { Lazy, Stack } from '../../core';
+import * as iam from '../../aws-iam';
+import { Lazy, Stack ,Fn, CfnMapping} from '../../core';
 import { Source } from '../lib';
 import { renderData } from '../lib/render-data';
 
@@ -154,3 +155,18 @@ test('lazy string which resolves to something with a deploy-time value', () => {
     markers: { },
   });
 });
+
+test('supports Fn::FindInMap in deploy-time json data', () => {
+  const stack = new Stack();
+  const mapping = new CfnMapping(stack, 'TestMapping', {
+    mapping: { responseTemplate: { full: 'example value' } },
+  });
+
+  const source = Source.jsonData('file.json', {
+    key: Fn.findInMap('TestMapping', 'responseTemplate', 'full'),
+  });
+
+  expect(() => source.bind(stack, { handlerRole: new iam.Role(stack, 'Role', {
+    assumedBy: new iam.ServicePrincipal('lambda.amazonaws.com'),
+  }) })).not.toThrow();
+});