# AssetOptions

Asset hash options.

- Source: [`core/lib/assets.ts`](https://github.com/aws/aws-cdk/blob/v2.274.0/packages/aws-cdk-lib/core/lib/assets.ts#L18)

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import * as cdk from 'aws-cdk-lib';

declare const dockerImage: cdk.DockerImage;
declare const localBundling: cdk.ILocalBundling;
const assetOptions: cdk.AssetOptions = {
  assetHash: 'assetHash',
  assetHashType: cdk.AssetHashType.SOURCE,
  bundling: {
    image: dockerImage,

    // the properties below are optional
    bundlingFileAccess: cdk.BundlingFileAccess.VOLUME_COPY,
    command: ['command'],
    entrypoint: ['entrypoint'],
    environment: {
      environmentKey: 'environment',
    },
    local: localBundling,
    network: 'network',
    outputType: cdk.BundlingOutput.ARCHIVED,
    platform: 'platform',
    securityOpt: 'securityOpt',
    user: 'user',
    volumes: [{
      containerPath: 'containerPath',
      hostPath: 'hostPath',

      // the properties below are optional
      consistency: cdk.DockerVolumeConsistency.CONSISTENT,
    }],
    volumesFrom: ['volumesFrom'],
    workingDirectory: 'workingDirectory',
  },
};
```

## Properties

- `assetHash`: string — Specify a custom hash for this asset.

  **Default:** based on `assetHashType`

  If `assetHashType` is set it must
  be set to `AssetHashType.CUSTOM`. For consistency, this custom hash will
  be SHA256 hashed and encoded as hex. The resulting hash will be the asset
  hash.

  NOTE: the hash is used in order to identify a specific revision of the asset, and
  used for optimizing and caching deployment activities related to this asset such as
  packaging, uploading to Amazon S3, etc. If you chose to customize the hash, you will
  need to make sure it is updated every time the asset changes, or otherwise it is
  possible that some deployments will not be invalidated.

- `assetHashType`: [AssetHashType](/cdk/api/v2/docs/aws-cdk-lib.AssetHashType.html) — Specifies the type of hash to calculate for this asset.

  **Default:** the default is `AssetHashType.SOURCE`, but if `assetHash` is explicitly specified this value defaults to `AssetHashType.CUSTOM`.

  If `assetHash` is configured, this option must be `undefined` or
  `AssetHashType.CUSTOM`.

- `bundling`: [BundlingOptions](/cdk/api/v2/docs/aws-cdk-lib.BundlingOptions.html) — Bundle the asset by executing a command in a Docker container or a custom bundling provider.

  **Default:** uploaded as-is to S3 if the asset is a regular file or a .zip file, archived into a .zip file and uploaded to S3 otherwise

  The asset path will be mounted at `/asset-input`. The Docker
  container is responsible for putting content at `/asset-output`.
  The content at `/asset-output` will be zipped and used as the
  final asset.