fix: add branch support for CdkDeployer (#521)

Author: vgkowski

core/API.md

@@ -41,6 +41,11 @@ export interface CdkDeployerProps extends cdk.StackProps {
    * @default - The root of the repository
    */
   readonly cdkAppLocation?: string;
+  /**
+   * The branch to use on the Github repository. 
+   * @default - The main branch of the repository
+   */
+  readonly gitBranch?: string;
 }
 
 /**
@@ -230,6 +235,7 @@ export class CdkDeployer extends cdk.Stack {
       source: Source.gitHub({
         owner: props.githubRepository.split('/')[0],
         repo: props.githubRepository.split('/')[1],
+        branchOrRef: props.gitBranch ? props.gitBranch : undefined,
         reportBuildStatus: true,
       }),
       buildSpec: BuildSpec.fromObject({

core/src/common/cdk-deployer.ts

@@ -19,6 +19,7 @@ const integTestApp = new cdk.App();
 const cdkDeployerStack = new CdkDeployer(integTestApp, 'CdkDeployerE2ETest', {
   githubRepository: 'aws-samples/aws-analytics-reference-architecture',
   cdkAppLocation: 'refarch/aws-native',
+  gitBranch: 'main',
   cdkParameters: {
     QuickSightUsername: {
       default: 'gromav/gromav-Isengard',
@@ -47,5 +48,5 @@ describe('deploy succeed', () => {
 });
 
 afterAll(async () => {
-  //await destroyStack(integTestApp, cdkDeployerStack);
+  await destroyStack(integTestApp, cdkDeployerStack);
 });