Function collectImportMetaEnvDefinitions

lib/dependencies/ImportMetaPlugin.js:82–105

(compilation)

 * @returns {{ stringify: string, env: Record<string, string> }} env object as JSON string
 */
const collectImportMetaEnvDefinitions = (compilation) => {
	const cached = compilationMetaEnvMap.get(compilation);
	if (cached) {
		return cached;
	}

	const definePluginHooks = DefinePlugin.getCompilationHooks(compilation);
	const definitions = definePluginHooks.definitions.call({});
	/** @type {Record<string, string>} */
	const env = {};
	/** @type {string[]} */
	const pairs = [];
	for (const key of Object.keys(definitions)) {
		if (key.startsWith("import.meta.env.")) {
			const envKey = key.slice("import.meta.env.".length);
			const value = definitions[key];
			pairs.push(`${JSON.stringify(envKey)}:${value}`);
			env[envKey] = /** @type {string} */ (value);
		}
	}
	const result = { stringify: `{${pairs.join(",")}}`, env };
	compilationMetaEnvMap.set(compilation, result);
	return result;
};

/**
 * Defines the import meta plugin hooks type used by this module.