flow like the river

BACK_BACK/node_modules/parcel-bundler/lib/Asset.js

@@ -0,0 +1,359 @@
+"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 URL = require('url');
+
+const path = require('path');
+
+const clone = require('clone');
+
+const fs = require('@parcel/fs');
+
+const md5 = require('./utils/md5');
+
+const isURL = require('./utils/is-url');
+
+const config = require('./utils/config');
+
+const syncPromise = require('./utils/syncPromise');
+
+const logger = require('@parcel/logger');
+
+const Resolver = require('./Resolver');
+
+const objectHash = require('./utils/objectHash');
+
+const t = require('babel-types');
+/**
+ * An Asset represents a file in the dependency tree. Assets can have multiple
+ * parents that depend on it, and can be added to multiple output bundles.
+ * The base Asset class doesn't do much by itself, but sets up an interface
+ * for subclasses to implement.
+ */
+
+
+class Asset {
+  constructor(name, options) {
+    this.id = null;
+    this.name = name;
+    this.basename = path.basename(this.name);
+    this.relativeName = path.relative(options.rootDir, this.name).replace(/\\/g, '/');
+    this.options = options;
+    this.encoding = 'utf8';
+    this.type = path.extname(this.name).slice(1);
+    this.hmrPageReload = false;
+    this.processed = false;
+    this.contents = options.rendition ? options.rendition.value : null;
+    this.ast = null;
+    this.generated = null;
+    this.hash = null;
+    this.sourceMaps = null;
+    this.parentDeps = new Set();
+    this.dependencies = new Map();
+    this.depAssets = new Map();
+    this.parentBundle = null;
+    this.bundles = new Set();
+    this.cacheData = {};
+    this.startTime = 0;
+    this.endTime = 0;
+    this.buildTime = 0;
+    this.bundledSize = 0;
+    this.resolver = new Resolver(options);
+  }
+
+  shouldInvalidate() {
+    return false;
+  }
+
+  loadIfNeeded() {
+    var _this = this;
+
+    return (0, _asyncToGenerator2.default)(function* () {
+      if (_this.contents == null) {
+        _this.contents = yield _this.load();
+      }
+    })();
+  }
+
+  parseIfNeeded() {
+    var _this2 = this;
+
+    return (0, _asyncToGenerator2.default)(function* () {
+      yield _this2.loadIfNeeded();
+
+      if (!_this2.ast) {
+        _this2.ast = yield _this2.parse(_this2.contents);
+      }
+    })();
+  }
+
+  getDependencies() {
+    var _this3 = this;
+
+    return (0, _asyncToGenerator2.default)(function* () {
+      if (_this3.options.rendition && _this3.options.rendition.hasDependencies === false) {
+        return;
+      }
+
+      yield _this3.loadIfNeeded();
+
+      if (_this3.contents && _this3.mightHaveDependencies()) {
+        yield _this3.parseIfNeeded();
+        yield _this3.collectDependencies();
+      }
+    })();
+  }
+
+  addDependency(name, opts) {
+    this.dependencies.set(name, Object.assign({
+      name
+    }, opts));
+  }
+
+  resolveDependency(url, from = this.name) {
+    const parsed = URL.parse(url);
+    let depName;
+    let resolved;
+    let dir = path.dirname(from);
+    const filename = decodeURIComponent(parsed.pathname);
+
+    if (filename[0] === '~' || filename[0] === '/') {
+      if (dir === '.') {
+        dir = this.options.rootDir;
+      }
+
+      depName = resolved = this.resolver.resolveFilename(filename, dir);
+    } else {
+      resolved = path.resolve(dir, filename);
+      depName = './' + path.relative(path.dirname(this.name), resolved);
+    }
+
+    return {
+      depName,
+      resolved
+    };
+  }
+
+  addURLDependency(url, from = this.name, opts) {
+    if (!url || isURL(url)) {
+      return url;
+    }
+
+    if (typeof from === 'object') {
+      opts = from;
+      from = this.name;
+    }
+
+    const _this$resolveDependen = this.resolveDependency(url, from),
+          depName = _this$resolveDependen.depName,
+          resolved = _this$resolveDependen.resolved;
+
+    this.addDependency(depName, Object.assign({
+      dynamic: true,
+      resolved
+    }, opts));
+    const parsed = URL.parse(url);
+    parsed.pathname = this.options.parser.getAsset(resolved, this.options).generateBundleName();
+    return URL.format(parsed);
+  }
+
+  get package() {
+    logger.warn('`asset.package` is deprecated. Please use `await asset.getPackage()` instead.');
+    return syncPromise(this.getPackage());
+  }
+
+  getPackage() {
+    var _this4 = this;
+
+    return (0, _asyncToGenerator2.default)(function* () {
+      if (!_this4._package) {
+        _this4._package = yield _this4.resolver.findPackage(path.dirname(_this4.name));
+      }
+
+      return _this4._package;
+    })();
+  }
+
+  getConfig(filenames, opts = {}) {
+    var _this5 = this;
+
+    return (0, _asyncToGenerator2.default)(function* () {
+      if (opts.packageKey) {
+        let pkg = yield _this5.getPackage();
+
+        if (pkg && pkg[opts.packageKey]) {
+          return clone(pkg[opts.packageKey]);
+        }
+      } // Resolve the config file
+
+
+      let conf = yield config.resolve(opts.path || _this5.name, filenames);
+
+      if (conf) {
+        // Add as a dependency so it is added to the watcher and invalidates
+        // this asset when the config changes.
+        _this5.addDependency(conf, {
+          includedInParent: true
+        });
+
+        if (opts.load === false) {
+          return conf;
+        }
+
+        return config.load(opts.path || _this5.name, filenames);
+      }
+
+      return null;
+    })();
+  }
+
+  mightHaveDependencies() {
+    return true;
+  }
+
+  load() {
+    var _this6 = this;
+
+    return (0, _asyncToGenerator2.default)(function* () {
+      return fs.readFile(_this6.name, _this6.encoding);
+    })();
+  }
+
+  parse() {// do nothing by default
+  }
+
+  collectDependencies() {// do nothing by default
+  }
+
+  pretransform() {// do nothing by default
+
+    return (0, _asyncToGenerator2.default)(function* () {})();
+  }
+
+  transform() {// do nothing by default
+
+    return (0, _asyncToGenerator2.default)(function* () {})();
+  }
+
+  generate() {
+    var _this7 = this;
+
+    return (0, _asyncToGenerator2.default)(function* () {
+      return {
+        [_this7.type]: _this7.contents
+      };
+    })();
+  }
+
+  process() {
+    var _this8 = this;
+
+    return (0, _asyncToGenerator2.default)(function* () {
+      // Generate the id for this asset, unless it has already been set.
+      // We do this here rather than in the constructor to avoid unnecessary work in the main process.
+      // In development, the id is just the relative path to the file, for easy debugging and performance.
+      // In production, we use a short hash of the relative path.
+      if (!_this8.id) {
+        _this8.id = _this8.options.production || _this8.options.scopeHoist ? t.toIdentifier(md5(_this8.relativeName, 'base64')).slice(0, 4) : _this8.relativeName;
+      }
+
+      if (!_this8.generated) {
+        yield _this8.loadIfNeeded();
+        yield _this8.pretransform();
+        yield _this8.getDependencies();
+        yield _this8.transform();
+        _this8.generated = yield _this8.generate();
+      }
+
+      return _this8.generated;
+    })();
+  }
+
+  postProcess(generated) {
+    return (0, _asyncToGenerator2.default)(function* () {
+      return generated;
+    })();
+  }
+
+  generateHash() {
+    return objectHash(this.generated);
+  }
+
+  invalidate() {
+    this.processed = false;
+    this.contents = null;
+    this.ast = null;
+    this.generated = null;
+    this.hash = null;
+    this.dependencies.clear();
+    this.depAssets.clear();
+  }
+
+  invalidateBundle() {
+    this.parentBundle = null;
+    this.bundles.clear();
+    this.parentDeps.clear();
+  }
+
+  generateBundleName() {
+    // Generate a unique name. This will be replaced with a nicer
+    // name later as part of content hashing.
+    return md5(this.relativeName) + '.' + this.type;
+  }
+
+  replaceBundleNames(bundleNameMap) {
+    let copied = false;
+
+    for (let key in this.generated) {
+      let value = this.generated[key];
+
+      if (typeof value === 'string') {
+        // Replace temporary bundle names in the output with the final content-hashed names.
+        let newValue = value;
+
+        var _iterator = _createForOfIteratorHelper(bundleNameMap),
+            _step;
+
+        try {
+          for (_iterator.s(); !(_step = _iterator.n()).done;) {
+            let _step$value = (0, _slicedToArray2.default)(_step.value, 2),
+                name = _step$value[0],
+                map = _step$value[1];
+
+            newValue = newValue.split(name).join(map);
+          } // Copy `this.generated` on write so we don't end up writing the final names to the cache.
+
+        } catch (err) {
+          _iterator.e(err);
+        } finally {
+          _iterator.f();
+        }
+
+        if (newValue !== value && !copied) {
+          this.generated = Object.assign({}, this.generated);
+          copied = true;
+        }
+
+        this.generated[key] = newValue;
+      }
+    }
+  }
+
+  generateErrorMessage(err) {
+    return err;
+  }
+
+}
+
+module.exports = Asset;