website/astro-integrations/minify/index.ts

import type { AstroIntegration } from "astro";
import { minify } from "html-minifier";
import { writeFile, readFile } from "node:fs/promises";
import { fileURLToPath } from "node:url";

export default (): AstroIntegration => {
  return {
    name: "hyro-minify",
    hooks: {
      "astro:build:done": async (opts) => {
        for (const route of opts.routes) {
          if (!route.distURL) continue;

          const content = await readFile(fileURLToPath(route.distURL), "utf-8");
          const minified = await minify(content, {
            removeAttributeQuotes: true,
            collapseWhitespace: true,
            minifyCSS: true,
            html5: true,
            removeComments: true,
            minifyJS: true,
            minifyURLs: true,
          });

          await writeFile(fileURLToPath(route.distURL!), minified, "utf-8");
          console.log(`Minified ${route.distURL!.pathname}`);
        }
      },
    },
  };
};