@aws-cdk/core
Version:
AWS Cloud Development Kit Core Library
79 lines • 9.79 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.TreeMetadata = void 0;
const fs = require("fs");
const path = require("path");
const cloud_assembly_schema_1 = require("@aws-cdk/cloud-assembly-schema");
const annotations_1 = require("../annotations");
const construct_compat_1 = require("../construct-compat");
const stack_1 = require("../stack");
const tree_1 = require("../tree");
const FILE_PATH = 'tree.json';
/**
* Construct that is automatically attached to the top-level `App`.
* This generates, as part of synthesis, a file containing the construct tree and the metadata for each node in the tree.
* The output is in a tree format so as to preserve the construct hierarchy.
*
* @experimental
*/
class TreeMetadata extends construct_compat_1.Construct {
constructor(scope) {
super(scope, 'Tree');
}
/**
* Create tree.json
* @internal
*/
_synthesizeTree(session) {
const lookup = {};
const visit = (construct) => {
const children = construct.node.children.map((c) => {
try {
return visit(c);
}
catch (e) {
annotations_1.Annotations.of(this).addWarning(`Failed to render tree metadata for node [${c.node.id}]. Reason: ${e}`);
return undefined;
}
});
const childrenMap = children
.filter((child) => child !== undefined)
.reduce((map, child) => Object.assign(map, { [child.id]: child }), {});
const node = {
id: construct.node.id || 'App',
path: construct.node.path,
children: Object.keys(childrenMap).length === 0 ? undefined : childrenMap,
attributes: this.synthAttributes(construct),
};
lookup[node.path] = node;
return node;
};
const tree = {
version: 'tree-0.1',
tree: visit(this.node.root),
};
const builder = session.assembly;
fs.writeFileSync(path.join(builder.outdir, FILE_PATH), JSON.stringify(tree, undefined, 2), { encoding: 'utf-8' });
builder.addArtifact('Tree', {
type: cloud_assembly_schema_1.ArtifactType.CDK_TREE,
properties: {
file: FILE_PATH,
},
});
}
synthAttributes(construct) {
// check if a construct implements IInspectable
function canInspect(inspectable) {
return inspectable.inspect !== undefined;
}
const inspector = new tree_1.TreeInspector();
// get attributes from the inspector
if (canInspect(construct)) {
construct.inspect(inspector);
return stack_1.Stack.of(construct).resolve(inspector.attributes);
}
return undefined;
}
}
exports.TreeMetadata = TreeMetadata;
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