Migrate files in a directory with nested folders into a flat destination with Deno

migrate_dir.ts

import * as path from "jsr:@std/path";

const src = Deno.args[0];
const dest = Deno.args[1];

/**
 * Recursively crawl a directory and move the files into a dest(ination) directory (flat)
 * Run with: `deno run -A flatten_dir.ts some_dir flat_dir
 */
async function migrateDir(dir: string, dest: string) {
    await Deno.mkdir(dest, { recursive: true });
    for await (const dirEntry of Deno.readDir(dir)) {
        const filePath = path.join(dir, dirEntry.name);
        console.log(filePath);
        if (dirEntry.isDirectory) {
            await migrateDir(filePath, dest);
        } else {
            const newPath = path.join(dest, path.basename(dirEntry.name));
            console.log(`Moving ${filePath} to ${newPath}`);

            await Deno.rename(
                filePath,
                newPath,
            );
        }
    }
}

await migrateDir(src, dest);