# CodeBuildAction

CodePipeline build action that uses AWS CodeBuild.

Extends: Action › Action › CodeBuildAction
Implements: IAction

- Source: [`aws-codepipeline-actions/lib/codebuild/build-action.ts`](https://github.com/aws/aws-cdk/blob/v2.275.0/packages/aws-cdk-lib/aws-codepipeline-actions/lib/codebuild/build-action.ts#L118)

## Example

```ts
// Create a Cloudfront Web Distribution
import * as cloudfront from 'aws-cdk-lib/aws-cloudfront';
declare const distribution: cloudfront.Distribution;

// Create the build project that will invalidate the cache
const invalidateBuildProject = new codebuild.PipelineProject(this, `InvalidateProject`, {
  buildSpec: codebuild.BuildSpec.fromObject({
    version: '0.2',
    phases: {
      build: {
        commands:[
          'aws cloudfront create-invalidation --distribution-id ${CLOUDFRONT_ID} --paths "/*"',
          // Choose whatever files or paths you'd like, or all files as specified here
        ],
      },
    },
  }),
  environmentVariables: {
    CLOUDFRONT_ID: { value: distribution.distributionId },
  },
});

// Add Cloudfront invalidation permissions to the project
const distributionArn = `arn:aws:cloudfront::${this.account}:distribution/${distribution.distributionId}`;
invalidateBuildProject.addToRolePolicy(new iam.PolicyStatement({
  resources: [distributionArn],
  actions: [
    'cloudfront:CreateInvalidation',
  ],
}));

// Create the pipeline (here only the S3 deploy and Invalidate cache build)
const deployBucket = new s3.Bucket(this, 'DeployBucket');
const deployInput = new codepipeline.Artifact();
new codepipeline.Pipeline(this, 'Pipeline', {
  stages: [
    // ...
    {
      stageName: 'Deploy',
      actions: [
        new codepipeline_actions.S3DeployAction({
          actionName: 'S3Deploy',
          bucket: deployBucket,
          input: deployInput,
          runOrder: 1,
        }),
        new codepipeline_actions.CodeBuildAction({
          actionName: 'InvalidateCache',
          project: invalidateBuildProject,
          input: deployInput,
          runOrder: 2,
        }),
      ],
    },
  ],
});
```

## Initializer

```ts
new CodeBuildAction(props: CodeBuildActionProps)
```

## Properties

- `actionProperties`: [ActionProperties](/cdk/api/v2/docs/aws-cdk-lib.aws_codepipeline.ActionProperties.html) — The simple properties of the Action, like its Owner, name, etc.

  Note that this accessor will be called before the `bind` callback.

## Methods

- `bind(scope: Construct, stage: IStage, options: ActionBindOptions): ActionConfig` — The callback invoked when this Action is added to a Pipeline.

- `onStateChange(name: string, target?: IRuleTarget, options?: RuleProps): Rule` — Creates an Event that will be triggered whenever the state of this Action changes.

- `variable(variableName: string): string` — Reference a CodePipeline variable defined by the CodeBuild project this action points to.

  Variables in CodeBuild actions are defined using the 'exported-variables' subsection of the 'env'
  section of the buildspec.

  **Parameters**

  - `variableName` — the name of the variable to reference.