Method _buildAssetToChunkIndex

lib/Compilation.js:5366–5386

* @private * @returns {void}

()

	 * @returns {void}
	 */
	_buildAssetToChunkIndex() {
		if (this._assetToChunkIndex !== undefined) return;
		/** @type {Map<string, Set<Chunk>>} */
		const filesIndex = new Map();
		/** @type {Map<string, Set<Chunk>>} */
		const auxiliaryIndex = new Map();
		for (const chunk of this.chunks) {
			for (const file of chunk.files) {
				let set = filesIndex.get(file);
				if (set === undefined) filesIndex.set(file, (set = new Set()));
				set.add(chunk);
			}
			for (const file of chunk.auxiliaryFiles) {
				let set = auxiliaryIndex.get(file);
				if (set === undefined) auxiliaryIndex.set(file, (set = new Set()));
				set.add(chunk);
			}
		}
		this._assetToChunkIndex = filesIndex;
		this._assetToChunkAuxiliaryIndex = auxiliaryIndex;
	}

	/**
	 * @private