polymer-build
Version:
A library of Gulp build tasks
58 lines • 2.59 kB
JavaScript
;
/**
* @license
* Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
* This code may only be used under the BSD style license found at
* http://polymer.github.io/LICENSE.txt
* The complete set of authors may be found at
* http://polymer.github.io/AUTHORS.txt
* The complete set of contributors may be found at
* http://polymer.github.io/CONTRIBUTORS.txt
* Code distributed by Google as part of the polymer project is also
* subject to an additional IP rights grant found at
* http://polymer.github.io/PATENTS.txt
*/
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
const streams_1 = require("./streams");
/**
* This is a `UrlLoader` for use with a `polymer-analyzer` that reads files
* that have been gathered by a `BuildBundler` transform stream.
*/
class FileMapUrlLoader {
constructor(files, fallbackLoader) {
this.files = files;
this.fallbackLoader = fallbackLoader;
}
// Return true if we can return load the given url.
canLoad(url) {
return !!(this.files.has(url) ||
this.fallbackLoader && this.fallbackLoader.canLoad(url));
}
// Try to load the file from the map. If not in the map, try to load
// from the fallback loader.
load(url) {
return __awaiter(this, void 0, void 0, function* () {
const file = this.files.get(url);
if (file == null) {
if (this.fallbackLoader) {
if (this.fallbackLoader.canLoad(url)) {
return this.fallbackLoader.load(url);
}
throw new Error(`${url} not present in file map and fallback loader can not load.`);
}
throw new Error(`${url} not present in file map and no fallback loader.`);
}
return streams_1.getFileContents(file);
});
}
}
exports.FileMapUrlLoader = FileMapUrlLoader;
//# sourceMappingURL=file-map-url-loader.js.map