185 lines
7.0 KiB
JavaScript
185 lines
7.0 KiB
JavaScript
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"use strict";
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var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
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var _asyncToGenerator2 = _interopRequireDefault(require("@babel/runtime/helpers/asyncToGenerator"));
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/*
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Copyright 2018 Google LLC
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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const assert = require('assert');
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const path = require('path');
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const _require = require('workbox-build'),
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getManifest = _require.getManifest;
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const convertStringToAsset = require('./lib/convert-string-to-asset');
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const getDefaultConfig = require('./lib/get-default-config');
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const formatManifestFilename = require('./lib/format-manifest-filename');
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const getAssetHash = require('./lib/get-asset-hash');
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const getManifestEntriesFromCompilation = require('./lib/get-manifest-entries-from-compilation');
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const getWorkboxSWImports = require('./lib/get-workbox-sw-imports');
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const readFileWrapper = require('./lib/read-file-wrapper');
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const relativeToOutputPath = require('./lib/relative-to-output-path');
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const sanitizeConfig = require('./lib/sanitize-config');
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const stringifyManifest = require('./lib/stringify-manifest');
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const warnAboutConfig = require('./lib/warn-about-config');
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/**
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* This class supports taking an existing service worker file which already
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* uses Workbox, and injecting a reference to a [precache manifest]() into it,
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* allowing it to efficiently precache the assets created by a webpack build.
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*
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* Use an instance of `InjectManifest` in the
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* [`plugins` array](https://webpack.js.org/concepts/plugins/#usage) of a
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* webpack config.
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*
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* @module workbox-webpack-plugin
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*/
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class InjectManifest {
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/**
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* Creates an instance of InjectManifest.
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*
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* @param {Object} [config] See the
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* [configuration guide](https://developers.google.com/web/tools/workbox/modules/workbox-webpack-plugin#configuration)
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* for all supported options and defaults.
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*/
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constructor(config = {}) {
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assert(typeof config.swSrc === 'string', `swSrc must be set to the path ` + `to an existing service worker file.`);
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this.config = Object.assign(getDefaultConfig(), {
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// Default to using the same filename as the swSrc file, since that's
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// provided here. (In GenerateSW, that's not available.)
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swDest: path.basename(config.swSrc)
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}, config);
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}
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/**
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* @param {Object} compilation The webpack compilation.
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* @param {Function} readFile The function to use when reading files,
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* derived from compiler.inputFileSystem.
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* @private
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*/
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handleEmit(compilation, readFile) {
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var _this = this;
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return (0, _asyncToGenerator2.default)(function* () {
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const configWarning = warnAboutConfig(_this.config);
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if (configWarning) {
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compilation.warnings.push(configWarning);
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}
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const workboxSWImports = yield getWorkboxSWImports(compilation, _this.config); // this.config.modulePathPrefix may or may not have been set by
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// getWorkboxSWImports(), depending on the other config options. If it was
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// set, we need to pull it out and make use of it later, as it can't be
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// used by the underlying workbox-build getManifest() method.
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const modulePathPrefix = _this.config.modulePathPrefix;
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delete _this.config.modulePathPrefix;
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let entries = getManifestEntriesFromCompilation(compilation, _this.config);
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const importScriptsArray = [].concat(_this.config.importScripts);
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const sanitizedConfig = sanitizeConfig.forGetManifest(_this.config); // If there are any "extra" config options remaining after we remove the
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// ones that are used natively by the plugin, then assume that they should
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// be passed on to workbox-build.getManifest() to generate extra entries.
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if (Object.keys(sanitizedConfig).length > 0) {
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// If globPatterns isn't explicitly set, then default to [], instead of
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// the workbox-build.getManifest() default.
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sanitizedConfig.globPatterns = sanitizedConfig.globPatterns || [];
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const _ref = yield getManifest(sanitizedConfig),
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manifestEntries = _ref.manifestEntries,
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warnings = _ref.warnings;
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compilation.warnings = compilation.warnings.concat(warnings || []);
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entries = entries.concat(manifestEntries);
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}
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const manifestString = stringifyManifest(entries);
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const manifestAsset = convertStringToAsset(manifestString);
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const manifestHash = getAssetHash(manifestAsset);
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const manifestFilename = formatManifestFilename(_this.config.precacheManifestFilename, manifestHash);
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const pathToManifestFile = relativeToOutputPath(compilation, path.join(_this.config.importsDirectory, manifestFilename));
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compilation.assets[pathToManifestFile] = manifestAsset;
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importScriptsArray.push((compilation.options.output.publicPath || '') + pathToManifestFile.split(path.sep).join('/')); // workboxSWImports might be null if importWorkboxFrom is 'disabled'.
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if (workboxSWImports) {
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importScriptsArray.push(...workboxSWImports);
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}
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let originalSWString;
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/**
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* Check if the mentioned file name is in the webpack assets itself
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* or fallback to filesystem.
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*/
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if (compilation.assets[_this.config.swSrc]) {
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originalSWString = compilation.assets[_this.config.swSrc].source();
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} else {
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originalSWString = yield readFileWrapper(readFile, _this.config.swSrc);
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} // compilation.fileDependencies needs absolute paths.
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const absoluteSwSrc = path.resolve(_this.config.swSrc);
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if (Array.isArray(compilation.fileDependencies)) {
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// webpack v3
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if (compilation.fileDependencies.indexOf(absoluteSwSrc) === -1) {
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compilation.fileDependencies.push(absoluteSwSrc);
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}
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} else if ('add' in compilation.fileDependencies) {
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// webpack v4; no need to check for membership first, since it's a Set.
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compilation.fileDependencies.add(absoluteSwSrc);
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}
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const importScriptsString = importScriptsArray.map(JSON.stringify).join(', ');
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const setConfigString = modulePathPrefix ? `workbox.setConfig({modulePathPrefix: ` + `${JSON.stringify(modulePathPrefix)}});` : '';
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const postInjectionSWString = `importScripts(${importScriptsString});
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${setConfigString}
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${originalSWString}
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`;
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const relSwDest = relativeToOutputPath(compilation, _this.config.swDest);
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compilation.assets[relSwDest] = convertStringToAsset(postInjectionSWString);
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})();
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}
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/**
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* @param {Object} [compiler] default compiler object passed from webpack
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*
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* @private
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*/
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apply(compiler) {
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const readFile = compiler.inputFileSystem.readFile.bind(compiler.inputFileSystem);
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if ('hooks' in compiler) {
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// We're in webpack 4+.
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compiler.hooks.emit.tapPromise(this.constructor.name, compilation => this.handleEmit(compilation, readFile));
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} else {
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// We're in webpack 2 or 3.
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compiler.plugin('emit', (compilation, callback) => {
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this.handleEmit(compilation, readFile).then(callback).catch(callback);
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});
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}
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}
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}
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module.exports = InjectManifest;
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