Method request

lib/LazyBarrel.js:310–347

* Requests the export names that `dependencies` need from a lazy barrel and * returns the deferred re-export targets that must be built now. Records the * request when the barrel's dependencies were not classified yet. * @param {Module} module the resolved module * @param {Dependency[]} depe

(module, dependencies)

	 * @returns {UnlazyDependencyInfo[] | undefined} items to process, if any
	 */
	request(module, dependencies) {
		// state only exists for side-effect-free modules, so a non-side-effect-free
		// module never has state — skip the WeakMap lookup entirely for it
		const factoryMeta = module.factoryMeta;
		if (factoryMeta === undefined || !factoryMeta.sideEffectFree) return;
		const modules = this._modules;
		const state = modules.get(module);

		if (state === undefined) {
			const forwardedIds = getForwardedIds(dependencies);
			if (forwardedIds !== true && forwardedIds.size === 0) return;
			modules.set(module, {
				forwardedIds,
				lazyBarrelInfo: undefined
			});
			return;
		}

		const forwardedIds = getForwardedIds(dependencies);
		if (forwardedIds !== true && forwardedIds.size === 0) return;
		if (state.forwardedIds !== true) {
			if (forwardedIds === true) state.forwardedIds = true;
			else for (const id of forwardedIds) state.forwardedIds.add(id);
		}
		const info = state.lazyBarrelInfo;
		// Pending requests will be replayed during `classify` later
		if (info === undefined) return;
		const groups = info.request(forwardedIds);
		// drop the per-module state once every deferred target has been built
		if (info.isEmpty()) state.lazyBarrelInfo = undefined;
		if (groups.length === 0) return;
		return groups.map((group) => ({
			factory: group.factory,
			dependencies: group.dependencies,
			context: group.context,
			originModule: module
		}));
	}

	/**
	 * Queues the deferred dependency groups of a lazy barrel requested by a single dependency.