weichenandCursor
3dbd9770b5
Use Node zlib in a post-vite step so the Go server can serve negotiated variants without per-request compression cost. Co-authored-by: Cursor <cursoragent@cursor.com>
71 lines
2.4 KiB
JavaScript
71 lines
2.4 KiB
JavaScript
#!/usr/bin/env node
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/**
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* Build-time precompress for web/dist: write sibling .br / .gz variants.
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* Zero npm deps — uses Node zlib (available in node:22-bookworm web-builder).
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*/
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import fs from 'node:fs';
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import path from 'node:path';
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import { brotliCompressSync, constants as zlibConstants, gzipSync } from 'node:zlib';
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import { fileURLToPath } from 'node:url';
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const __dirname = path.dirname(fileURLToPath(import.meta.url));
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const distDir = path.resolve(__dirname, '..', 'dist');
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const MIN_BYTES = 1024;
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const COMPRESS_EXT = new Set(['.js', '.css', '.html', '.svg', '.json', '.txt', '.xml', '.map']);
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const SKIP_EXT = new Set(['.woff', '.woff2', '.png', '.jpg', '.jpeg', '.gif', '.webp', '.ico', '.br', '.gz']);
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function walk(dir, out = []) {
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for (const ent of fs.readdirSync(dir, { withFileTypes: true })) {
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const full = path.join(dir, ent.name);
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if (ent.isDirectory()) walk(full, out);
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else out.push(full);
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}
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return out;
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}
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function shouldCompress(filePath) {
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const ext = path.extname(filePath).toLowerCase();
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if (SKIP_EXT.has(ext)) return false;
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if (!COMPRESS_EXT.has(ext)) return false;
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const st = fs.statSync(filePath);
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return st.size >= MIN_BYTES;
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}
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function writeIfSmaller(sourcePath, variantPath, buf, label, originalSize) {
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if (buf.length >= originalSize) {
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if (fs.existsSync(variantPath)) fs.unlinkSync(variantPath);
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return null;
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}
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fs.writeFileSync(variantPath, buf);
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const pct = ((1 - buf.length / originalSize) * 100).toFixed(1);
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console.log(
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` ${label.padEnd(4)} ${path.relative(distDir, sourcePath)} ${originalSize} → ${buf.length} (−${pct}%)`,
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);
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return buf.length;
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}
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if (!fs.existsSync(distDir)) {
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console.error(`precompress: missing ${distDir}; run vite build first`);
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process.exit(1);
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}
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const files = walk(distDir).filter(shouldCompress);
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console.log(`precompress: ${files.length} candidate(s) under ${distDir}`);
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let brCount = 0;
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let gzCount = 0;
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for (const file of files) {
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const raw = fs.readFileSync(file);
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const br = brotliCompressSync(raw, {
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params: {
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[zlibConstants.BROTLI_PARAM_QUALITY]: 11,
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[zlibConstants.BROTLI_PARAM_SIZE_HINT]: raw.length,
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},
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});
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const gz = gzipSync(raw, { level: 9 });
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if (writeIfSmaller(file, `${file}.br`, br, 'br', raw.length) != null) brCount += 1;
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if (writeIfSmaller(file, `${file}.gz`, gz, 'gzip', raw.length) != null) gzCount += 1;
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}
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console.log(`precompress: wrote ${brCount} .br and ${gzCount} .gz`);
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