@lipemat/js-boilerplate/lib/postcss-clean.js

Dependencies and scripts for a no config JavaScript app

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.postcss = void 0;
/**
 * Mimic the `postcss-clean` plugin.
 *
 * Override due to the plugin using version 4 of `clean-css`, which
 * has issues with PostCSS 7/8 and results in inconsistent CSS.
 *
 * This may potentially be removed in favor of using that plugin again if
 * they change the version of PostCSS to 8 and Clean CSS to 5.
 *
 * Decided to use this `lib` instead of maintaining another fork.
 *
 * @link https://www.npmjs.com/package/postcss-clean
 *
 */
const postcss_1 = __importDefault(require("postcss"));
// Can't use `import` due to the plugin not supporting a default export.
const CleanCSS = require('clean-css');
const cleaner = (opts = {}) => {
    const clean = new CleanCSS(opts);
    return {
        postcssPlugin: 'clean',
        OnceExit(css, { result }) {
            return new Promise((resolve, reject) => {
                clean.minify(css.toString(), (err, min) => {
                    if (null !== err) {
                        return reject(new Error(err.join('\n')));
                    }
                    if (min.warnings.length > 0) {
                        return reject(new Error('postcss-clean minify failed! \n' + min.warnings.join('\n')));
                    }
                    result.root = postcss_1.default.parse(min.styles);
                    resolve();
                });
            });
        },
    };
};
exports.postcss = true;
exports.default = cleaner;