gatsby-plugin-purgecss/shared.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.Debug = exports.stats = void 0;

var _util = _interopRequireDefault(require("util"));

var _fsExtra = _interopRequireDefault(require("fs-extra"));

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

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

/**
 * @class Stats
 */
class Stats {
  constructor() {
    /** @type {number} */
    this.removedQuantity = 0;
    /** @type {number} */

    this.totalCssSize = 0;
    /** @type {number} */

    this.purgedCssSize = 0;
  }
  /**
   * @param {number} quantity
   */


  add(quantity) {
    this.removedQuantity = this.removedQuantity + quantity;
  }
  /**
   * @param {string} css
   */


  addSize(css) {
    this.totalCssSize = this.totalCssSize + Buffer.byteLength(css, 'utf8');
  }
  /**
   * @param {string} css
   */


  addRemovedSize(css) {
    this.purgedCssSize = this.purgedCssSize + Buffer.byteLength(css, 'utf8');
  }
  /**
   * @param {number} value
   * @returns {string}
   */


  toKB(value) {
    return (value / 1024).toFixed(2);
  }
  /**
   * @returns {string}
   */


  get sizeDifference() {
    return this.toKB(this.totalCssSize - this.purgedCssSize);
  }
  /**
   * @returns {string}
   */


  get newSize() {
    return this.toKB(this.purgedCssSize);
  }
  /**
   * @returns {string}
   */


  get oldSize() {
    return this.toKB(this.totalCssSize);
  }
  /**
   * @returns {string}
   */


  get percentChange() {
    if (this.totalCssSize <= 0) {
      return '0.00';
    }

    return ((this.totalCssSize - this.purgedCssSize) / this.totalCssSize * 100).toFixed(2);
  }

  printStats() {
    console.log(_utils.color.FgGreen, `\ngatsby-plugin-purgecss:`);
    console.log(_utils.color.FgCyan, `Previous CSS Size: ${this.oldSize} KB`);
    console.log(_utils.color.FgCyan, `New CSS Size: ${this.newSize} KB (-${this.percentChange}%)`);
    console.log(_utils.color.FgYellow, `Removed ~${this.sizeDifference} KB of CSS`);
    console.log(_utils.color.Reset);
  }

}

const stats = new Stats();
exports.stats = stats;

class Debug {
  /**
   * @param {Object} config 
   */
  static writeConfig(config) {
    console.debug('\ngatsby-plugin-purgecss: Writing config to gatsby-plugin-purgecss-debug-config.js');

    try {
      _fsExtra.default.writeFileSync('gatsby-plugin-purgecss-debug-config.js', _util.default.inspect(config, {
        depth: 15
      }), 'utf8');
    } catch (error) {
      console.log('\nCould not write file.');
      console.log(error);
      return -1;
    }

    return 0;
  }
  /**
   * @memberof Debug
   * @param {object} error 
   * @return {number}
   */


  static writeAppendError(error) {
    console.debug('gatsby-plugin-purgecss: Writing errors to gatsby-plugin-purgecss-debug.js');

    try {
      _fsExtra.default.appendFileSync('gatsby-plugin-purgecss-debug.js', _util.default.inspect(error), 'utf8');
    } catch (error) {
      console.log('\nCould not write file.');
      console.log(error);
      return -1;
    }

    return 0;
  }

}

exports.Debug = Debug;