Asset

class aws_cdk.aws_s3_assets.Asset(scope, id, *, path, deploy_time=None, readers=None, asset_hash=None, asset_hash_type=None, bundling=None, exclude=None, follow_symlinks=None, ignore_mode=None)

Bases: Construct

An asset represents a local file or directory, which is automatically uploaded to S3 and then can be referenced within a CDK application.

ExampleMetadata:: infused

Example:

import aws_cdk as cdk


asset = Asset(self, "BundledAsset",
    path="/path/to/asset",
    bundling=cdk.BundlingOptions(
        image=cdk.DockerImage.from_registry("alpine"),
        command=["command-that-produces-an-archive.sh"],
        output_type=cdk.BundlingOutput.NOT_ARCHIVED
    )
)

Parameters:

scope (Construct) –
id (str) –
path (str) – The disk location of the asset. The path should refer to one of the following: - A regular file or a .zip file, in which case the file will be uploaded as-is to S3. - A directory, in which case it will be archived into a .zip file and uploaded to S3.
deploy_time (Optional[bool]) – Whether or not the asset needs to exist beyond deployment time; i.e. are copied over to a different location and not needed afterwards. Setting this property to true has an impact on the lifecycle of the asset, because we will assume that it is safe to delete after the CloudFormation deployment succeeds. For example, Lambda Function assets are copied over to Lambda during deployment. Therefore, it is not necessary to store the asset in S3, so we consider those deployTime assets. Default: false
readers (Optional[Sequence[IGrantable]]) – A list of principals that should be able to read this asset from S3. You can use asset.grantRead(principal) to grant read permissions later. Default: - No principals that can read file asset.
asset_hash (Optional[str]) – Specify a custom hash for this asset. 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. Default: - based on assetHashType
asset_hash_type (Optional[AssetHashType]) – Specifies the type of hash to calculate for this asset. If assetHash is configured, this option must be undefined or AssetHashType.CUSTOM. Default: - the default is AssetHashType.SOURCE, but if assetHash is explicitly specified this value defaults to AssetHashType.CUSTOM.
bundling (Union[BundlingOptions, Dict[str, Any], None]) – Bundle the asset by executing a command in a Docker container or a custom bundling provider. 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. 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
exclude (Optional[Sequence[str]]) – File paths matching the patterns will be excluded. See ignoreMode to set the matching behavior. Has no effect on Assets bundled using the bundling property. Default: - nothing is excluded
follow_symlinks (Optional[SymlinkFollowMode]) – A strategy for how to handle symlinks. Default: SymlinkFollowMode.NEVER
ignore_mode (Optional[IgnoreMode]) – The ignore behavior to use for exclude patterns. Default: IgnoreMode.GLOB

Methods

add_resource_metadata(resource, resource_property)

Adds CloudFormation template metadata to the specified resource with information that indicates which resource property is mapped to this local asset.

This can be used by tools such as SAM CLI to provide local experience such as local invocation and debugging of Lambda functions.

Asset metadata will only be included if the stack is synthesized with the “aws:cdk:enable-asset-metadata” context key defined, which is the default behavior when synthesizing via the CDK Toolkit.

Parameters:

resource (CfnResource) – The CloudFormation resource which is using this asset [disable-awslint:ref-via-interface].
resource_property (str) – The property name where this asset is referenced (e.g. “Code” for AWS::Lambda::Function).

See:

https://github.com/aws/aws-cdk/issues/1432

Return type:

None

grant_read(grantee)

Grants read permissions to the principal on the assets bucket.

Parameters:

grantee (IGrantable) –

Return type:

None

to_string()

Returns a string representation of this construct.

Return type:: str

Attributes

asset_hash

A hash of this asset, which is available at construction time.

As this is a plain string, it can be used in construct IDs in order to enforce creation of a new resource when the content hash has changed.

asset_path

The path to the asset, relative to the current Cloud Assembly.

If asset staging is disabled, this will just be the original path. If asset staging is enabled it will be the staged path.

bucket: The S3 bucket in which this asset resides.

http_url

Attribute which represents the S3 HTTP URL of this asset.

For example, https://s3.us-west-1.amazonaws.com/bucket/key

is_file

Indicates if this asset is a single file.

Allows constructs to ensure that the correct file type was used.

is_zip_archive

Indicates if this asset is a zip archive.

Allows constructs to ensure that the correct file type was used.

node: The tree node.

s3_bucket_name: Attribute that represents the name of the bucket this asset exists in.

s3_object_key: Attribute which represents the S3 object key of this asset.

s3_object_url

Attribute which represents the S3 URL of this asset.

For example, s3://bucket/key

Static Methods

classmethod is_construct(x)

Checks if x is a construct.

Use this method instead of instanceof to properly detect Construct instances, even when the construct library is symlinked.

Explanation: in JavaScript, multiple copies of the constructs library on disk are seen as independent, completely different libraries. As a consequence, the class Construct in each copy of the constructs library is seen as a different class, and an instance of one class will not test as instanceof the other class. npm install will not create installations like this, but users may manually symlink construct libraries together or use a monorepo tool: in those cases, multiple copies of the constructs library can be accidentally installed, and instanceof will behave unpredictably. It is safest to avoid using instanceof, and using this type-testing method instead.

Parameters:: x (Any) – Any object.
Return type:: bool
Returns:: true if x is an object created from a class which extends Construct.