AWS CDKのスタックをGitHubからCodePipeline連携で自動更新する

import * as cdk from '@aws-cdk/core';
import * as codebuild from '@aws-cdk/aws-codebuild'
import * as codepipeline from '@aws-cdk/aws-codepipeline'
import * as codepipeline_actions from '@aws-cdk/aws-codepipeline-actions'
import * as iam from '@aws-cdk/aws-iam'

export class CdkPipelineStack extends cdk.Stack {
  constructor(scope: cdk.Construct, id: string, props?: cdk.StackProps) {
    super(scope, id, props)

    const build = new codebuild.PipelineProject(this,'testBuild',{
      buildSpec: codebuild.BuildSpec.fromObject({
        version: '0.2',
        phases: {
          install: {
            commands: [
              'npm install -g [email protected]',
              'npm install -g typescript'
            ]
          },
          pre_build: {
            commands: 'npm i'
          },
          post_build: {
            commands: [
              'cdk deploy --require-approval never'
            ]
          },
        },
      }),
      projectName: 'cdk-deploy'
    })
    build.addToRolePolicy(new iam.PolicyStatement({
      resources: ['*'],
      actions: ['*']
    }))
    const sourceOutput = new codepipeline.Artifact()
    const repositoryName = '管理したいGitHubのリポジトリ名'
    const owner = 'リポジトリの所有者名'
    const oauthToken = 'GitHubのトークン'
    const branch = 'master'

    const sourceAction = new codepipeline_actions.GitHubSourceAction ({
        actionName: 'Github_Source',
        owner: owner,
        repo: repositoryName,
        branch: branch,
        oauthToken: cdk.SecretValue.plainText(oauthToken),
        trigger: codepipeline_actions.GitHubTrigger.WEBHOOK,
        output: sourceOutput
    })

    const buildOutput = new codepipeline.Artifact()
    const buildAction = new codepipeline_actions.CodeBuildAction({
      actionName: 'CodeBuild',
      project: build,
      input: sourceOutput,
      outputs: [buildOutput]
    })

    new codepipeline.Pipeline(this, 'pipeline', {
      pipelineName: 'cdk-deploy-pipeline',
      stages: [
        {
          stageName: 'Source',
          actions: [
            sourceAction
          ],
        },
        {
          stageName: 'Build',
          actions: [
            buildAction
          ],
        }
      ]
    })
  }
}