vite.config.ts

import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';
import path, { resolve } from 'path';
import wasm from 'vite-plugin-wasm';
import topLevelAwait from 'vite-plugin-top-level-await';
import makeManifest from './utils/plugins/make-manifest';
import customDynamicImport from './utils/plugins/custom-dynamic-import';
import addHmr from './utils/plugins/add-hmr';
import watchRebuild from './utils/plugins/watch-rebuild';
import manifest from './manifest';

const rootDir = resolve(__dirname);
const srcDir = resolve(rootDir, 'src');
const pagesDir = resolve(srcDir, 'pages');
const assetsDir = resolve(srcDir, 'assets');
const outDir = resolve(rootDir, 'dist');
const publicDir = resolve(rootDir, 'public');

const isDev = process.env.__DEV__ === 'true';
const isProduction = !isDev;

// ENABLE HMR IN BACKGROUND SCRIPT
const enableHmrInBackgroundScript = true;

export default defineConfig({
  resolve: {
    alias: {
      '@root': rootDir,
      '@src': srcDir,
      '@assets': assetsDir,
      '@pages': pagesDir,
    },
  },
  plugins: [
    react(),
    makeManifest(manifest, {
      isDev,
      contentScriptCssKey: regenerateCacheInvalidationKey(),
    }),
    wasm(),
    topLevelAwait(),
    customDynamicImport(),
    addHmr({ background: enableHmrInBackgroundScript, view: true }),
    watchRebuild(),
  ],
  publicDir,
  build: {
    outDir,
    target: ['chrome88', 'firefox85'],
    /** Can slowDown build speed. */
    // sourcemap: isDev,
    minify: isProduction,
    modulePreload: false,
    reportCompressedSize: isProduction,
    rollupOptions: {
      external: 'pdfjs-dist/build/pdf.worker.mjs',
      input: {
        content: resolve(pagesDir, 'content', 'index.ts'),
        background: resolve(pagesDir, 'background', 'index.ts'),
        popup: resolve(pagesDir, 'popup', 'index.html'),
        options: resolve(pagesDir, 'options', 'index.html'),
        sidePanel: resolve(pagesDir, 'sidePanel', 'index.html'),
      },
      output: {
        entryFileNames: 'src/pages/[name]/index.js',
        chunkFileNames: isDev ? 'assets/js/[name].js' : 'assets/js/[name].[hash].js',
        assetFileNames: assetInfo => {
          const { dir, name: _name } = path.parse(assetInfo.name);
          const assetFolder = dir.split('/').at(-1);
          const name = assetFolder + firstUpperCase(_name);
          return `assets/[ext]/${name}.chunk.[ext]`;
        },
      },
    },
  },
});

function firstUpperCase(str: string) {
  const firstAlphabet = new RegExp(/( |^)[a-z]/, 'g');
  return str.toLowerCase().replace(firstAlphabet, L => L.toUpperCase());
}

let cacheInvalidationKey: string = generateKey();
function regenerateCacheInvalidationKey() {
  cacheInvalidationKey = generateKey();
  return cacheInvalidationKey;
}

function generateKey(): string {
  return `${(Date.now() / 100).toFixed()}`;
}