chore: Goodbye gulp (#11447)

* Add a script for building assets

* Replace with script executions

* Remove gulp dependencies

* Fix dependencies

---------

Co-authored-by: Acid Chicken (硫酸鶏) <root@acid-chicken.com>
Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

scripts/build-assets.mjs

@@ -0,0 +1,87 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import * as fs from 'node:fs/promises';
+import * as path from 'node:path';
+import cssnano from 'cssnano';
+import postcss from 'postcss';
+import * as terser from 'terser';
+
+import locales from '../locales/index.js';
+import meta from '../package.json' assert { type: "json" };
+
+async function copyFrontendFonts() {
+  await fs.cp('./packages/frontend/node_modules/three/examples/fonts', './built/_frontend_dist_/fonts', { dereference: true, recursive: true });
+}
+
+async function copyFrontendTablerIcons() {
+  await fs.cp('./packages/frontend/node_modules/@tabler/icons-webfont', './built/_frontend_dist_/tabler-icons', { dereference: true, recursive: true });
+}
+
+async function copyFrontendLocales() {
+  await fs.mkdir('./built/_frontend_dist_/locales', { recursive: true });
+
+  const v = { '_version_': meta.version };
+
+  for (const [lang, locale] of Object.entries(locales)) {
+    await fs.writeFile(`./built/_frontend_dist_/locales/${lang}.${meta.version}.json`, JSON.stringify({ ...locale, ...v }), 'utf-8');
+  }
+}
+
+async function copyBackendViews() {
+  await fs.cp('./packages/backend/src/server/web/views', './packages/backend/built/server/web/views', { recursive: true });
+}
+
+async function buildBackendScript() {
+  await fs.mkdir('./packages/backend/built/server/web', { recursive: true });
+
+  for (const file of [
+    './packages/backend/src/server/web/boot.js',
+    './packages/backend/src/server/web/bios.js',
+    './packages/backend/src/server/web/cli.js'
+  ]) {
+    let source = await fs.readFile(file, { encoding: 'utf-8' });
+    source = source.replaceAll('LANGS', JSON.stringify(Object.keys(locales)));
+    const { code } = await terser.minify(source, { toplevel: true });
+    await fs.writeFile(`./packages/backend/built/server/web/${path.basename(file)}`, code);
+  }
+}
+
+async function buildBackendStyle() {
+  await fs.mkdir('./packages/backend/built/server/web', { recursive: true });
+
+  for (const file of [
+    './packages/backend/src/server/web/style.css',
+    './packages/backend/src/server/web/bios.css',
+    './packages/backend/src/server/web/cli.css',
+    './packages/backend/src/server/web/error.css'
+  ]) {
+    const source = await fs.readFile(file, { encoding: 'utf-8' });
+    const { css } = await postcss([cssnano({ zindex: false })]).process(source, { from: undefined });
+    await fs.writeFile(`./packages/backend/built/server/web/${path.basename(file)}`, css);
+  }
+}
+
+async function build() {
+  await Promise.all([
+    copyFrontendFonts(),
+    copyFrontendTablerIcons(),
+    copyFrontendLocales(),
+    copyBackendViews(),
+    buildBackendScript(),
+    buildBackendStyle(),
+  ]);
+}
+
+await build();
+
+if (process.argv.includes("--watch")) {
+  const watcher = fs.watch('./packages', { recursive: true });
+  for await (const event of watcher) {
+    if (/^[a-z]+\/src/.test(event.filename)) {
+      await build();
+    }
+  }
+}