workbox-build
Version:
A module that integrates into your build process, helping you generate a manifest of local files that workbox-sw should precache.
43 lines (34 loc) • 1.12 kB
JavaScript
/*
Copyright 2019 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 errors = require('./errors');
module.exports = (additionalManifestEntries) => {
return (manifest) => {
const warnings = [];
const stringEntries = new Set();
for (const additionalEntry of additionalManifestEntries) {
// Warn about either a string or an object that lacks a precache property.
// (An object with a revision property set to null is okay.)
if (typeof additionalEntry === 'string') {
stringEntries.add(additionalEntry);
} else if (additionalEntry && additionalEntry.revision === undefined) {
stringEntries.add(additionalEntry.url);
}
manifest.push(additionalEntry);
}
if (stringEntries.size > 0) {
let urls = '\n';
for (const stringEntry of stringEntries) {
urls += ` - ${stringEntry}\n`;
}
warnings.push(errors['string-entry-warning'] + urls);
}
return {
manifest,
warnings,
};
};
};