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/*
Copyright 2018 Google LLC
Use of this source code is governed by an MIT-style
license that can be found in the LICENSE file or at
https://opensource.org/licenses/MIT.
*/
const assert = require('assert');
const fse = require('fs-extra');
const path = require('path');
const checkForDeprecatedOptions =
require('../lib/check-for-deprecated-options');
const defaults = require('./options/defaults');
const errors = require('../lib/errors');
const getFileManifestEntries = require('../lib/get-file-manifest-entries');
const injectManifestSchema = require('./options/inject-manifest-schema');
const validate = require('./options/validate');
/**
* This method creates a list of URLs to precache, referred to as a "precache
* manifest", based on the options you provide.
*
* The manifest is injected into the `swSrc` file, and the regular expression
* `injectionPointRegexp` determines where in the file the manifest should go.
*
* The final service worker file, with the manifest injected, is written to
* disk at `swDest`.
*
* @param {Object} config Please refer to the
* [configuration guide](https://developers.google.com/web/tools/workbox/modules/workbox-build#full_injectmanifest_config).
* @return {Promise<{count: number, size: number, warnings: Array<string>}>}
* A promise that resolves once the service worker file has been written to
* `swDest`. The `size` property contains the aggregate size of all the
* precached entries, in bytes, and the `count` property contains the total
* number of precached entries. Any non-fatal warning messages will be returned
* via `warnings`.
*
* @memberof module:workbox-build
*/
async function injectManifest(config) {
// This check needs to be done before validation, since the deprecated options
// will be renamed.
const deprecationWarnings = checkForDeprecatedOptions(config);
const options = validate(config, injectManifestSchema);
if (path.normalize(config.swSrc) === path.normalize(config.swDest)) {
throw new Error(errors['same-src-and-dest']);
}
const globalRegexp = new RegExp(options.injectionPointRegexp, 'g');
const {count, size, manifestEntries, warnings} =
await getFileManifestEntries(options);
let swFileContents;
try {
swFileContents = await fse.readFile(config.swSrc, 'utf8');
} catch (error) {
throw new Error(`${errors['invalid-sw-src']} ${error.message}`);
}
const injectionResults = swFileContents.match(globalRegexp);
assert(injectionResults, errors['injection-point-not-found'] +
// Customize the error message when this happens:
// - If the default RegExp is used, then include the expected string that
// matches as a hint to the developer.
// - If a custom RegExp is used, then just include the raw RegExp.
(options.injectionPointRegexp === defaults.injectionPointRegexp ?
'workbox.precaching.precacheAndRoute([])' :
options.injectionPointRegexp));
assert(injectionResults.length === 1, errors['multiple-injection-points'] +
` ${options.injectionPointRegexp}`);
const entriesString = JSON.stringify(manifestEntries, null, 2);
swFileContents = swFileContents.replace(globalRegexp, `$1${entriesString}$2`);
try {
await fse.mkdirp(path.dirname(options.swDest));
} catch (error) {
throw new Error(errors['unable-to-make-injection-directory'] +
` '${error.message}'`);
}
await fse.writeFile(config.swDest, swFileContents);
// Add in any deprecation warnings.
warnings.push(...deprecationWarnings);
return {count, size, warnings};
}
module.exports = injectManifest;