hydrogen-web/scripts/build.mjs

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import cheerio from "cheerio";
import fsRoot from "fs";
const fs = fsRoot.promises;
import path from "path";
import rollup from 'rollup';
import postcss from "postcss";
import postcssImport from "postcss-import";
import { fileURLToPath } from 'url';
import { dirname } from 'path';
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
const projectDir = path.join(__dirname, "../");
const targetDir = path.join(projectDir, "target");
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const debug = false;
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const offline = true;
async function build() {
// get version number
const version = JSON.parse(await fs.readFile(path.join(projectDir, "package.json"), "utf8")).version;
// clear target dir
await removeDirIfExists(targetDir);
await fs.mkdir(targetDir);
await buildHtml(version);
await buildJs();
await buildCss();
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if (offline) {
await buildOffline(version);
}
console.log(`built brawl ${version} successfully`);
}
async function buildHtml(version) {
// transform html file
const devHtml = await fs.readFile(path.join(projectDir, "index.html"), "utf8");
const doc = cheerio.load(devHtml);
doc("link[rel=stylesheet]").attr("href", "brawl.css");
doc("script#main").replaceWith(
`<script type="text/javascript" src="brawl.js"></script>` +
`<script type="text/javascript">main(document.body);</script>`);
removeOrEnableScript(doc("script#phone-debug-pre"), debug);
removeOrEnableScript(doc("script#phone-debug-post"), debug);
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removeOrEnableScript(doc("script#service-worker"), offline);
const versionScript = doc("script#version");
versionScript.attr("type", "text/javascript");
let vSource = versionScript.contents().text();
vSource = vSource.replace(`"%%VERSION%%"`, `"${version}"`);
versionScript.text(vSource);
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if (offline) {
doc("html").attr("manifest", "manifest.appcache");
doc("head").append(`<link rel="manifest" href="manifest.json">`);
}
await fs.writeFile(path.join(targetDir, "index.html"), doc.html(), "utf8");
}
async function buildJs() {
// create js bundle
const rollupConfig = {
input: 'src/main.js',
output: {
file: path.join(targetDir, "brawl.js"),
format: 'iife',
name: 'main'
}
};
const bundle = await rollup.rollup(rollupConfig);
await bundle.write(rollupConfig);
}
async function buildOffline(version) {
// write offline availability
const offlineFiles = ["brawl.js", "brawl.css", "index.html", "icon-192.png"];
// write appcache manifest
const manifestLines = [
`CACHE MANIFEST`,
`# v${version}`,
`NETWORK`,
`"*"`,
`CACHE`,
];
manifestLines.push(...offlineFiles);
const manifest = manifestLines.join("\n") + "\n";
await fs.writeFile(path.join(targetDir, "manifest.appcache"), manifest, "utf8");
// write service worker
let swSource = await fs.readFile(path.join(projectDir, "src/service-worker.template.js"), "utf8");
swSource = swSource.replace(`"%%VERSION%%"`, `"${version}"`);
swSource = swSource.replace(`"%%FILES%%"`, JSON.stringify(offlineFiles));
await fs.writeFile(path.join(targetDir, "sw.js"), swSource, "utf8");
// write web manifest
const webManifest = {
name: "Brawl Chat",
short_name: "Brawl",
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display: "fullscreen",
start_url: "index.html",
icons: [{"src": "icon-192.png", "sizes": "192x192", "type": "image/png"}],
};
await fs.writeFile(path.join(targetDir, "manifest.json"), JSON.stringify(webManifest), "utf8");
// copy icon
let icon = await fs.readFile(path.join(projectDir, "icon.png"));
await fs.writeFile(path.join(targetDir, "icon-192.png"), icon);
}
async function buildCss() {
// create css bundle
const cssMainFile = path.join(projectDir, "src/ui/web/css/main.css");
const preCss = await fs.readFile(cssMainFile, "utf8");
const cssBundler = postcss([postcssImport]);
const result = await cssBundler.process(preCss, {from: cssMainFile});
await fs.writeFile(path.join(targetDir, "brawl.css"), result.css, "utf8");
}
function removeOrEnableScript(scriptNode, enable) {
if (enable) {
scriptNode.attr("type", "text/javascript");
} else {
scriptNode.remove();
}
}
async function removeDirIfExists(targetDir) {
try {
const files = await fs.readdir(targetDir);
await Promise.all(files.map(filename => fs.unlink(path.join(targetDir, filename))));
await fs.rmdir(targetDir);
} catch (err) {
if (err.code !== "ENOENT") {
throw err;
}
}
}
build().catch(err => console.error(err));