39 lines
1.4 KiB
JavaScript
39 lines
1.4 KiB
JavaScript
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import { readdir, readFile, stat, utimes, writeFile } from "node:fs/promises";
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import { gzip } from "node:zlib";
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import { promisify } from "node:util";
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const gzipAsync = promisify(gzip);
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const assetDirectory = new URL("../dist/assets/", import.meta.url);
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const compressedExtensions = /\.(?:js|css|json|svg)$/i;
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const minimumBytes = 1024;
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let compressedCount = 0;
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let sourceBytes = 0;
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let gzipBytes = 0;
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async function compressAssets(directory) {
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for (const entry of await readdir(directory, { withFileTypes: true })) {
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const path = new URL(`${entry.name}${entry.isDirectory() ? "/" : ""}`, directory);
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if (entry.isDirectory()) {
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await compressAssets(path);
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continue;
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}
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if (!compressedExtensions.test(entry.name)) continue;
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const info = await stat(path);
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if (info.size < minimumBytes) continue;
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const source = await readFile(path);
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const compressed = await gzipAsync(source, { level: 9 });
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const compressedPath = new URL(`${entry.name}.gz`, directory);
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await writeFile(compressedPath, compressed);
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// Nginx gzip_static can safely pair the sidecar with its source file.
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await utimes(compressedPath, info.atime, info.mtime);
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compressedCount += 1;
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sourceBytes += source.byteLength;
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gzipBytes += compressed.byteLength;
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}
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}
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await compressAssets(assetDirectory);
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console.log(
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`Precompressed ${compressedCount} assets: ${sourceBytes} -> ${gzipBytes} bytes`,
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);
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