flow like the river

BACK_BACK/node_modules/parcel-bundler/lib/assets/GraphqlAsset.js

@@ -0,0 +1,100 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+
+var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
+
+var _asyncToGenerator2 = _interopRequireDefault(require("@babel/runtime/helpers/asyncToGenerator"));
+
+function _createForOfIteratorHelper(o, allowArrayLike) { var it; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it.return != null) it.return(); } finally { if (didErr) throw err; } } }; }
+
+function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
+
+function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
+
+const Asset = require('../Asset');
+
+const localRequire = require('../utils/localRequire');
+
+const Resolver = require('../Resolver');
+
+const fs = require('@parcel/fs');
+
+const os = require('os');
+
+const IMPORT_RE = /^# *import +['"](.*)['"] *;? *$/;
+
+class GraphqlAsset extends Asset {
+  constructor(name, options) {
+    super(name, options);
+    this.type = 'js';
+    this.gqlMap = new Map();
+    this.gqlResolver = new Resolver(Object.assign({}, this.options, {
+      extensions: ['.gql', '.graphql']
+    }));
+  }
+
+  traverseImports(name, code) {
+    var _this = this;
+
+    return (0, _asyncToGenerator2.default)(function* () {
+      _this.gqlMap.set(name, code);
+
+      yield Promise.all(code.split(/\r\n?|\n/).map(line => line.match(IMPORT_RE)).filter(match => !!match).map( /*#__PURE__*/function () {
+        var _ref = (0, _asyncToGenerator2.default)(function* ([, importName]) {
+          let _yield$_this$gqlResol = yield _this.gqlResolver.resolve(importName, name),
+              resolved = _yield$_this$gqlResol.path;
+
+          if (_this.gqlMap.has(resolved)) {
+            return;
+          }
+
+          let code = yield fs.readFile(resolved, 'utf8');
+          yield _this.traverseImports(resolved, code);
+        });
+
+        return function (_x) {
+          return _ref.apply(this, arguments);
+        };
+      }()));
+    })();
+  }
+
+  collectDependencies() {
+    var _iterator = _createForOfIteratorHelper(this.gqlMap),
+        _step;
+
+    try {
+      for (_iterator.s(); !(_step = _iterator.n()).done;) {
+        let _step$value = (0, _slicedToArray2.default)(_step.value, 1),
+            path = _step$value[0];
+
+        this.addDependency(path, {
+          includedInParent: true
+        });
+      }
+    } catch (err) {
+      _iterator.e(err);
+    } finally {
+      _iterator.f();
+    }
+  }
+
+  parse(code) {
+    var _this2 = this;
+
+    return (0, _asyncToGenerator2.default)(function* () {
+      let gql = yield localRequire('graphql-tag', _this2.name);
+      yield _this2.traverseImports(_this2.name, code);
+      const allCodes = [..._this2.gqlMap.values()].join(os.EOL);
+      return gql(allCodes);
+    })();
+  }
+
+  generate() {
+    return `module.exports=${JSON.stringify(this.ast, null, 2)};`;
+  }
+
+}
+
+module.exports = GraphqlAsset;