flow like the river

VISUALIZACION/node_modules/parcel-bundler/lib/transforms/postcss.js

@@ -0,0 +1,76 @@
+'use strict';
+
+let getConfig = (() => {
+  var _ref2 = _asyncToGenerator(function* (asset) {
+    let config = asset.package.postcss || (yield asset.getConfig(['.postcssrc', '.postcssrc.js', 'postcss.config.js']));
+
+    let enableModules = asset.options.rendition && asset.options.rendition.modules;
+    if (!config && !asset.options.minify && !enableModules) {
+      return;
+    }
+
+    config = Object.assign({}, 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 || enableModules) {
+      let postcssModules = yield localRequire('postcss-modules', asset.name);
+      config.plugins.push(postcssModules(postcssModulesConfig));
+    }
+
+    if (asset.options.minify) {
+      config.plugins.push(cssnano((yield asset.getConfig(['cssnano.config.js'])) || {
+        // Only enable safe css transforms by default.
+        // See: https://github.com/parcel-bundler/parcel/issues/698
+        // Note: Remove when upgrading cssnano to v4
+        // See: https://github.com/ben-eb/cssnano/releases/tag/v4.0.0-rc.0
+        safe: true
+      }));
+    }
+
+    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 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);
+  };
+})();