flow like the river

VISUALIZACION/node_modules/parcel-bundler/lib/assets/SASSAsset.js

@@ -0,0 +1,95 @@
+'use strict';
+
+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 Asset = require('../Asset');
+const localRequire = require('../utils/localRequire');
+const promisify = require('../utils/promisify');
+const path = require('path');
+const os = require('os');
+const Resolver = require('../Resolver');
+const syncPromise = require('../utils/syncPromise');
+
+class SASSAsset extends Asset {
+  constructor(name, pkg, options) {
+    super(name, pkg, options);
+    this.type = 'css';
+  }
+
+  parse(code) {
+    var _this = this;
+
+    return _asyncToGenerator(function* () {
+      // node-sass should be installed locally in the module that's being required
+      let sass = yield localRequire('node-sass', _this.name);
+      let render = promisify(sass.render.bind(sass));
+      const resolver = new Resolver({
+        extensions: ['.scss', '.sass'],
+        rootDir: _this.options.rootDir
+      });
+
+      let opts = Object.assign({}, _this.package.sass || (yield _this.getConfig(['.sassrc', '.sassrc.js'])));
+      opts.includePaths = (opts.includePaths || []).concat(path.dirname(_this.name));
+      opts.data = opts.data ? opts.data + os.EOL + code : code;
+      opts.indentedSyntax = typeof opts.indentedSyntax === 'boolean' ? opts.indentedSyntax : path.extname(_this.name).toLowerCase() === '.sass';
+
+      opts.functions = Object.assign({}, opts.functions, {
+        url: function url(node) {
+          let filename = _this.addURLDependency(node.getValue());
+          return new sass.types.String(`url(${JSON.stringify(filename)})`);
+        }
+      });
+
+      opts.importer = function (url, prev, done) {
+        let resolved;
+        try {
+          resolved = syncPromise(resolver.resolve(url, prev === 'stdin' ? _this.name : prev)).path;
+        } catch (e) {
+          resolved = url;
+        }
+        return done({
+          file: resolved
+        });
+      };
+
+      return yield render(opts);
+    })();
+  }
+
+  collectDependencies() {
+    var _iteratorNormalCompletion = true;
+    var _didIteratorError = false;
+    var _iteratorError = undefined;
+
+    try {
+      for (var _iterator = this.ast.stats.includedFiles[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
+        let dep = _step.value;
+
+        this.addDependency(dep, { includedInParent: true });
+      }
+    } catch (err) {
+      _didIteratorError = true;
+      _iteratorError = err;
+    } finally {
+      try {
+        if (!_iteratorNormalCompletion && _iterator.return) {
+          _iterator.return();
+        }
+      } finally {
+        if (_didIteratorError) {
+          throw _iteratorError;
+        }
+      }
+    }
+  }
+
+  generate() {
+    return [{
+      type: 'css',
+      value: this.ast ? this.ast.css.toString() : '',
+      hasDependencies: false
+    }];
+  }
+}
+
+module.exports = SASSAsset;