/**
 * Function that mutates the original webpack config.
 * Supports asynchronous changes when a promise is returned (or it's an async function).
 *
 * @param {import('preact-cli').Config} config - original webpack config
 * @param {import('preact-cli').Env} env - current environment and options pass to the CLI
 * @param {import('preact-cli').Helpers} helpers - object with useful helpers for working with the webpack config
 * @param {Record<string, unknown>} options - this is mainly relevant for plugins (will always be empty in the config), default to an empty object
 */
export default (config, env, helpers, options) => {
	const webpack = helpers.webpack;
	const babelLoader = helpers.getLoadersByName(config, 'babel-loader')[0];
	...
};

export default (config, env, helpers) => {
	const webpack = helpers.webpack;
};

export default (config, env, helpers) => {
	const loaders = helpers.getLoaders(config);
};

export default (config, env, helpers) => {
	const rules = helpers.getRules(config);
};

export default (config, env, helpers) => {
	const plugins = helpers.getPlugins(config);
};

export default (config, env, helpers) => {
	const matchingRules = helpers.getRulesByMatchingFile(config, 'src/index.js');
};

export default (config, env, helpers) => {
	const babelLoader = helpers.getLoadersByName(config, 'babel-loader')[0];
};

export default (config, env, helpers) => {
	const critters = helpers.getPluginsByName(config, 'Critters')[0];
};

export default (config, env, helpers) => {
	const webpack = helpers.webpack;
	const definePlugin = helpers.getPluginsByName(config, webpack.DefinePlugin)[0];
};