gatsby-plugin-purgecss/loader.js

Gatsby plugin for purgecss. Removes unused css/sass/less/stylus from files and modules. Supports Tailwindcss, Bootstrap, Bulma etc.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = loader;

var _purgecss = _interopRequireDefault(require("purgecss"));

var _loaderUtils = require("loader-utils");

var _shared = require("./shared");

var _utils = require("./utils");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, source[key]); }); } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

/**
 * Purgecss Loader
 * @this {LoaderContext & {rootContext:string}}
 * @param {string} source
 */
function loader(source) {
  const options =
  /** @type {OptionObject} */
  (0, _loaderUtils.getOptions)(this);

  if (options.rejected) {
    _shared.stats.addSize(source);
  }

  if (Array.isArray(options.ignore) && options.ignore.length > 0) {
    const normalizedPath = (0, _utils.normalizePath)(this.resourcePath, this.rootContext);

    if (options.ignore.some(file => normalizedPath.includes(file))) {
      console.log('\ngatsby-plugin-purgecss: Ignored ', this.resourcePath);

      _shared.stats.addRemovedSize(source);

      return source;
    }
  }

  if (Array.isArray(options.purgeOnly) && options.purgeOnly.length > 0) {
    const normalizedPath = (0, _utils.normalizePath)(this.resourcePath, this.rootContext);

    if (options.purgeOnly.some(file => normalizedPath.includes(file))) {
      console.log('\ngatsby-plugin-purgecss: Only processing ', this.resourcePath);
    } else {
      _shared.stats.addRemovedSize(source);

      return source;
    }
  }

  let css;

  try {
    // @ts-ignore
    css = new _purgecss.default(_objectSpread({
      css: [{
        raw: source
      }]
    }, options)).purge();
  } catch (error) {
    console.log('\ngatsby-plugin-purgecss: Could not parse file, skipping. Your build will not break.\n', this.resourcePath);

    if (options.debug) {
      _shared.Debug.writeAppendError(error);
    } else {
      console.log('Use debug option to investigate further.');
    }

    return source;
  }

  if (options.rejected) {
    const rejected = css[0].rejected;

    _shared.stats.add(rejected.length);

    _shared.stats.addRemovedSize(css[0].css);

    if (options.printRejected && Array.isArray(rejected)) {
      const filtered = rejected.map(val => {
        return val.replace('\n', '');
      });
      console.log(_utils.color.FgGreen, '\nFrom: ', this.resourcePath);
      console.log(_utils.color.Reset, 'Removed Selectors: ', options.printAll ? JSON.stringify(filtered) : filtered);
    }
  }

  return css[0].css;
}