Method _getTarget

lib/ExportsInfo.js:1654–1746

* Returns the target. * @param {ModuleGraph} moduleGraph the module graph * @param {ResolveTargetFilter} resolveTargetFilter filter function to further resolve target * @param {AlreadyVisitedExportInfo | undefined} alreadyVisited set of already visited export info to avoid circular references

(moduleGraph, resolveTargetFilter, alreadyVisited)

	 * @returns {TargetItemWithConnection | CIRCULAR | undefined} the target
	 */
	_getTarget(moduleGraph, resolveTargetFilter, alreadyVisited) {
		/**
		 * Returns resolved target.
		 * @param {TargetItem | undefined | null} inputTarget unresolved target
		 * @param {AlreadyVisitedExportInfo} alreadyVisited set of already visited export info to avoid circular references
		 * @returns {TargetItemWithConnection | CIRCULAR | null} resolved target
		 */
		const resolveTarget = (inputTarget, alreadyVisited) => {
			if (!inputTarget) return null;
			if (!inputTarget.export) {
				return {
					module: inputTarget.connection.module,
					connection: inputTarget.connection,
					export: undefined
				};
			}
			/** @type {TargetItemWithConnection} */
			let target = {
				module: inputTarget.connection.module,
				connection: inputTarget.connection,
				export: inputTarget.export
			};
			if (!resolveTargetFilter(target)) return target;
			let alreadyVisitedOwned = false;
			for (;;) {
				const exportsInfo = moduleGraph.getExportsInfo(target.module);
				const exportInfo = exportsInfo.getExportInfo(
					/** @type {NonNullable<TargetItemWithConnection["export"]>} */
					(target.export)[0]
				);
				if (!exportInfo) return target;
				if (alreadyVisited.has(exportInfo)) return CIRCULAR;
				const newTarget = exportInfo._getTarget(
					moduleGraph,
					resolveTargetFilter,
					alreadyVisited
				);
				if (newTarget === CIRCULAR) return CIRCULAR;
				if (!newTarget) return target;
				if (
					/** @type {NonNullable<TargetItemWithConnection["export"]>} */
					(target.export).length === 1
				) {
					target = newTarget;
					if (!target.export) return target;
				} else {
					target = {
						module: newTarget.module,
						connection: newTarget.connection,
						export: newTarget.export
							? [
									...newTarget.export,
									.../** @type {NonNullable<TargetItemWithConnection["export"]>} */
									(target.export).slice(1)
								]
							: /** @type {NonNullable<TargetItemWithConnection["export"]>} */
								(target.export).slice(1)
					};