Function visitModules

lib/buildChunkGraph.js:294–1331

(
	logger,
	compilation,
	inputEntrypointsAndModules,
	chunkGroupInfoMap,
	blockConnections,
	blocksWithNestedBlocks,
	allCreatedChunkGroups,
	maskByChunk
)

 * @param {MaskByChunk} maskByChunk module content mask by chunk
 */
const visitModules = (
	logger,
	compilation,
	inputEntrypointsAndModules,
	chunkGroupInfoMap,
	blockConnections,
	blocksWithNestedBlocks,
	allCreatedChunkGroups,
	maskByChunk
) => {
	const { moduleGraph, chunkGraph, moduleMemCaches } = compilation;

	/** @type {Map<RuntimeSpec, BlockModulesMap>} */
	const blockModulesRuntimeMap = new Map();

	class="cm">// map containing the first extraction per root module,
	class="cm">// other runtimes derive their result from it
	/** @type {Map<Module, BlockModulesMap>} */
	const firstBlockModulesMapByModule = new Map();

	/** @type {Map<Module, number>} */
	const ordinalByModule = new Map();

	/**
	 * Gets module ordinal.
	 * @param {Module} module The module to look up
	 * @returns {number} The ordinal of the module in masks
	 */
	const getModuleOrdinal = (module) => {
		let ordinal = ordinalByModule.get(module);
		if (ordinal === undefined) {
			ordinal = ordinalByModule.size;
			ordinalByModule.set(module, ordinal);
		}
		return ordinal;
	};

	for (const chunk of compilation.chunks) {
		let mask = ZERO_BIGINT;
		for (const m of chunkGraph.getChunkModulesIterable(chunk)) {
			mask |= ONE_BIGINT << BigInt(getModuleOrdinal(m));
		}
		maskByChunk.set(chunk, mask);
	}

	/**
	 * Gets block modules.
	 * @param {DependenciesBlock} block block
	 * @param {RuntimeSpec} runtime runtime
	 * @returns {BlockModulesInFlattenTuples | undefined} block modules in flatten tuples
	 */
	const getBlockModules = (block, runtime) => {
		let blockModulesMap = blockModulesRuntimeMap.get(runtime);
		if (blockModulesMap === undefined) {
			/** @type {BlockModulesMap} */
			blockModulesMap = new Map();
			blockModulesRuntimeMap.set(runtime, blockModulesMap);
		}