parcel-bundler/lib/transforms/postcss.js

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'use strict';

let getConfig = (() => {
  var _ref2 = _asyncToGenerator(function* (asset) {
    let config = asset.package.postcss || (yield Config.load(asset.name, ['.postcssrc', '.postcssrc.js', 'postcss.config.js']));
    if (!config && !asset.options.minify) {
      return;
    }

    config = config || {};

    let postcssModulesConfig = {
      getJSON: function getJSON(filename, json) {
        return asset.cssModules = json;
      }
    };

    if (config.plugins && config.plugins['postcss-modules']) {
      postcssModulesConfig = Object.assign(config.plugins['postcss-modules'], postcssModulesConfig);
      delete config.plugins['postcss-modules'];
    }

    config.plugins = yield loadPlugins(config.plugins, asset.name);

    if (config.modules) {
      let postcssModules = yield localRequire('postcss-modules', asset.name);
      config.plugins.push(postcssModules(postcssModulesConfig));
    }

    if (asset.options.minify) {
      config.plugins.push(cssnano());
    }

    config.from = asset.name;
    config.to = asset.name;
    return config;
  });

  return function getConfig(_x2) {
    return _ref2.apply(this, arguments);
  };
})();

function _asyncToGenerator(fn) { return function () { var gen = fn.apply(this, arguments); return new Promise(function (resolve, reject) { function step(key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { return Promise.resolve(value).then(function (value) { step("next", value); }, function (err) { step("throw", err); }); } } return step("next"); }); }; }

const localRequire = require('../utils/localRequire');
const loadPlugins = require('../utils/loadPlugins');
const postcss = require('postcss');
const Config = require('../utils/config');
const cssnano = require('cssnano');

module.exports = (() => {
  var _ref = _asyncToGenerator(function* (asset) {
    let config = yield getConfig(asset);
    if (!config) {
      return;
    }

    yield asset.parseIfNeeded();
    let res = yield postcss(config.plugins).process(asset.getCSSAst(), config);

    asset.ast.css = res.css;
    asset.ast.dirty = false;
  });

  return function (_x) {
    return _ref.apply(this, arguments);
  };
})();