How can I reference an existing codebuild project in codepipeline via CDK? - amazon-web-services

Question

I am using AWS CDK to deploy codepipeline and codebuild. What I am current doing is to create codebuild in one cloudformation stack and reference the codebuild in the codepipeline in a different cf stack.
Below is my code, I create a codebuild action like:
const action = new actions.CodeBuildAction({
actionName: "MockEventBridge",
type: actions.CodeBuildActionType.BUILD,
input: input,
project: new codebuild.PipelineProject(this, name, {
projectName: mockName,
environment: {
computeType: codebuild.ComputeType.SMALL,
buildImage
privileged: true,
},
role,
buildSpec: codebuild.BuildSpec.fromSourceFilename(
"cicd/buildspec/mockEventbridge.yaml"
),
}),
runOrder: 1,
})
...
const stages = {
stageName, actions: [action]
}
once build the action, I use below code to build codepipeline.
new codepipeline.Pipeline(this, name, {
pipelineName: this.projectName,
role,
stages,
artifactBucket
});
The problem is that both the codebuild project and codepipeline are built into one stack. If I build the codebuild project in a separate cf stack, how can I reference this stack in codepipeline?
when look at the api reference https://docs.aws.amazon.com/cdk/api/v1/docs/#aws-cdk_aws-codepipeline.Pipeline.html, I can't find a way to reference the codebuild arn in codepipeline instance.

Answer 1

Use the codebuild.Project.fromProjectArn static method to import an external Project resource using its ARN. It returns an IProject, which is what your pipeline's actions.CodeBuildAction props expect.

Answer 2

You can use the export value to export the resource Codebuild created in another Stack.
The exported CodeBuild from the first Stack can be imported in the new Stack of CodePipeline.
You can see this page for more info https://lzygo1995.medium.com/how-to-export-and-import-stack-output-values-in-cdk-ff3e066ca6fc