Function getAndExtendSideEffectModules

src/Module.ts:190–220

(variable: Variable, module: Module)

}

function getAndExtendSideEffectModules(variable: Variable, module: Module): Set<Module> {
	const sideEffectModules = getOrCreate(
		module.sideEffectDependenciesByVariable,
		variable,
		getNewSet<Module>
	);
	let currentVariable: Variable | null = variable;
	const referencedVariables = new Set([currentVariable]);
	while (true) {
		const importingModule = currentVariable.module! as Module;
		currentVariable =
			currentVariable instanceof ExportDefaultVariable
				? currentVariable.getDirectOriginalVariable()
				: currentVariable instanceof SyntheticNamedExportVariable
					? currentVariable.syntheticNamespace
					: null;
		if (!currentVariable || referencedVariables.has(currentVariable)) {
			break;
		}
		referencedVariables.add(currentVariable);
		sideEffectModules.add(importingModule);
		const originalSideEffects =
			importingModule.sideEffectDependenciesByVariable.get(currentVariable);
		if (originalSideEffects) {
			for (const module of originalSideEffects) {
				sideEffectModules.add(module);
			}
		}
	}
	return sideEffectModules;
}

export default class Module {
	readonly alternativeReexportModules = new Map<Variable, Module>();