Import source: cshare-app/scripts/precompress.mjs

Import the existing local project snapshot. This commit organizes existing files; it does not represent newly developed functionality.

cshare-app/scripts/precompress.mjs

@@ -0,0 +1,54 @@
+import fs from 'node:fs/promises';
+import path from 'node:path';
+import { brotliCompress, constants, gzip } from 'node:zlib';
+import { promisify } from 'node:util';
+
+const gzipAsync = promisify(gzip);
+const brotliAsync = promisify(brotliCompress);
+const distDir = path.resolve('dist');
+const extensions = new Set([
+  '.css',
+  '.html',
+  '.js',
+  '.json',
+  '.svg',
+  '.txt',
+  '.ttf',
+]);
+
+async function walk(dir) {
+  const entries = await fs.readdir(dir, { withFileTypes: true });
+  const files = await Promise.all(entries.map(async (entry) => {
+    const fullPath = path.join(dir, entry.name);
+    if (entry.isDirectory()) return walk(fullPath);
+    return fullPath;
+  }));
+  return files.flat();
+}
+
+async function compressFile(filePath) {
+  if (!extensions.has(path.extname(filePath))) return;
+
+  const input = await fs.readFile(filePath);
+  if (input.length < 1024) return;
+
+  const [gz, br] = await Promise.all([
+    gzipAsync(input, { level: 9 }),
+    brotliAsync(input, {
+      params: {
+        [constants.BROTLI_PARAM_QUALITY]: 11,
+      },
+    }),
+  ]);
+
+  await Promise.all([
+    fs.writeFile(`${filePath}.gz`, gz),
+    fs.writeFile(`${filePath}.br`, br),
+  ]);
+}
+
+const files = await walk(distDir);
+await Promise.all(files.map(compressFile));
+
+console.log(`Precompressed ${files.length} dist files with gzip and Brotli where beneficial.`);
+