aws-cdk-lib
Version:
Version 2 of the AWS Cloud Development Kit library
49 lines • 6.46 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.TreeCloudArtifact = void 0;
const cloud_artifact_1 = require("../cloud-artifact");
const error_1 = require("../private/error");
const TREE_CLOUD_ARTIFACT_SYM = Symbol.for('@aws-cdk/cx-api.TreeCloudArtifact');
class TreeCloudArtifact extends cloud_artifact_1.CloudArtifact {
/**
* Checks if `art` is an instance of this class.
*
* Use this method instead of `instanceof` to properly detect `TreeCloudArtifact`
* instances, even when the construct library is symlinked.
*
* Explanation: in JavaScript, multiple copies of the `cx-api` library on
* disk are seen as independent, completely different libraries. As a
* consequence, the class `TreeCloudArtifact` in each copy of the `cx-api` 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 `cx-api`
* library can be accidentally installed, and `instanceof` will behave
* unpredictably. It is safest to avoid using `instanceof`, and using
* this type-testing method instead.
*/
static isTreeCloudArtifact(art) {
return art && typeof art === 'object' && TREE_CLOUD_ARTIFACT_SYM in art;
}
constructor(assembly, name, artifact) {
super(assembly, name, artifact);
const properties = (this.manifest.properties || {});
if (!properties.file) {
throw new error_1.CloudAssemblyError('Invalid TreeCloudArtifact. Missing "file" property');
}
this.file = properties.file;
}
}
exports.TreeCloudArtifact = TreeCloudArtifact;
/**
* Mark all instances of 'TreeCloudArtifact'
*
* Why not put this in the constructor? Because this is a class property,
* not an instance property. It applies to all instances of the class.
*/
Object.defineProperty(TreeCloudArtifact.prototype, TREE_CLOUD_ARTIFACT_SYM, {
value: true,
enumerable: false,
writable: false,
});
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