astro-minify-html-swc/dist/index.js

An Astro integration that minifies HTML

import fs from "node:fs/promises";
import path from "node:path";
import { fileURLToPath } from "node:url";
import { formatBytes } from "@ocavue/utils";
import glob from "fast-glob";

//#region src/index.ts
function formatSizeChange([sizeBefore, sizeAfter]) {
	const diff = sizeAfter - sizeBefore;
	const percent = 100 * diff / sizeBefore;
	return `${formatBytes(diff)} (${percent.toFixed(1)}%)`;
}
async function compress(logger, minify, dirPath, filePath, isDebug) {
	try {
		const fullPath = path.join(dirPath, filePath);
		const textBefore = await fs.readFile(fullPath, "utf-8");
		const sizeBefore = Buffer.byteLength(textBefore, "utf-8");
		const textAfter = (await minify(textBefore, {
			collapseWhitespaces: "conservative",
			removeComments: true,
			minifyJson: true,
			minifyJs: true,
			minifyCss: true
		})).code;
		const sizeAfter = Buffer.byteLength(textAfter, "utf-8");
		await fs.writeFile(fullPath, textAfter, "utf-8");
		if (isDebug) logger.debug(`${formatSizeChange([sizeBefore, sizeAfter])} ${filePath}`);
		return [sizeBefore, sizeAfter];
	} catch (error) {
		logger.error(`Failed to minify ${filePath}:`);
		logger.error(String(error));
		return [0, 0];
	}
}
function integration() {
	return {
		name: "astro-minify-html-swc",
		hooks: { "astro:build:done": async ({ logger, dir }) => {
			const timeStart = performance.now();
			const dirPath = fileURLToPath(dir);
			logger.debug(`Scanning ${dirPath}`);
			const filePaths = await glob("**/*.html", { cwd: dirPath });
			logger.debug(`Found ${filePaths.length} HTML files in ${dirPath}`);
			const { minify } = await import("@swc/html");
			const isDebug = logger.options.level === "debug";
			const sizeChanges = await Promise.all(filePaths.map((filePath) => {
				return compress(logger, minify, dirPath, filePath, isDebug);
			}));
			const totalSizeChange = [0, 0];
			for (const sizeChange of sizeChanges) {
				totalSizeChange[0] += sizeChange[0];
				totalSizeChange[1] += sizeChange[1];
			}
			const timeEnd = performance.now();
			logger.info(`${formatSizeChange(totalSizeChange)} Compressed ${filePaths.length} HTML files in ${Math.round(timeEnd - timeStart)}ms`);
		} }
	};
}

//#endregion
export { integration as default };
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