ha-frontend/script/gen-service-worker.js

96 lines
2.8 KiB
JavaScript
Executable File

#! /usr/bin/env node
/*
Generate a caching service worker for HA
Will be called as part of build_frontend.
Expects home-assistant-polymer repo as submodule of HA repo.
Creates a caching service worker based on the CURRENT content of HA repo.
Output service worker to build/service_worker.js
*/
var crypto = require('crypto');
var fs = require('fs');
var path = require('path');
var swPrecache = require('sw-precache');
var uglifyJS = require('uglify-js');
const DEV = !!JSON.parse(process.env.BUILD_DEV || 'true');
var rootDir = '..';
var panelDir = rootDir + '/panels';
var dynamicUrlToDependencies = {
'/': [rootDir + '/frontend.html', rootDir + '/core.js'],
};
var staticFingerprinted = [
'frontend.html',
'mdi.html',
'core.js',
];
// These panels will always be registered inside HA and thus can
// be safely assumed to be able to preload.
var panelsFingerprinted = [
'map', 'dev-event', 'dev-info', 'dev-service', 'dev-state', 'dev-template',
];
function md5(filename) {
return crypto.createHash('md5')
.update(fs.readFileSync(filename)).digest('hex');
}
// Create fingerprinted versions of our dependencies.
staticFingerprinted.forEach(fn => {
var parts = path.parse(fn);
var hash = md5(rootDir + '/' + parts.name + parts.ext);
var url = '/static/' + parts.name + '-' + hash + parts.ext;
var fpath = rootDir + '/' + parts.name + parts.ext;
dynamicUrlToDependencies[url] = [fpath];
});
panelsFingerprinted.forEach(panel => {
var fpath = panelDir + '/ha-panel-' + panel + '.html';
var hash = md5(fpath);
var url = '/frontend/panels/' + panel + '-' + hash + '.html';
dynamicUrlToDependencies[url] = [fpath];
});
var options = {
navigateFallback: '/',
navigateFallbackWhitelist: [/^((?!(static|api|local|service_worker.js|manifest.json)).)*$/],
dynamicUrlToDependencies: dynamicUrlToDependencies,
staticFileGlobs: [
rootDir + '/icons/favicon.ico',
rootDir + '/icons/favicon-192x192.png',
rootDir + '/webcomponents-lite.min.js',
rootDir + '/fonts/roboto/Roboto-Light.ttf',
rootDir + '/fonts/roboto/Roboto-Medium.ttf',
rootDir + '/fonts/roboto/Roboto-Regular.ttf',
rootDir + '/fonts/roboto/Roboto-Bold.ttf',
rootDir + '/images/card_media_player_bg.png',
],
stripPrefix: '..',
replacePrefix: 'static',
verbose: true,
};
var devBase = 'console.warn("Service worker caching disabled in development")';
var swHass = fs.readFileSync(path.resolve(__dirname, 'service-worker.js.tmpl'), 'UTF-8')
var genPromise = DEV ? Promise.resolve(devBase) : swPrecache.generate(options);
genPromise = genPromise.then(swString => swString + '\n' + swHass);
if (!DEV) {
genPromise = genPromise.then(
swString => uglifyJS.minify(swString, { fromString: true }).code);
}
genPromise.then(
swString =>
fs.writeFileSync(path.resolve(__dirname, '../build/service_worker.js'), swString)
).catch(err => console.error(err));