Firebase Storageから全ての画像ダウンロード

該当するフォルダを事前に作成する必要がある

download.js

const admin = require('firebase-admin');
const fs = require('fs');

const serviceAccount = require("path/to/serviceAccountKey.json");

admin.initializeApp({
    credential: admin.credential.cert(serviceAccount),
    storageBucket: "<BUCKET_NAME>.appspot.com"
});

const bucket = admin.storage().bucket();

async function main() {
    const files = await bucket.getFiles();
    files[0].forEach(async (file) => {
        const filePath = `./work/${file.name}`;
        if (!fs.existsSync(filePath)) {
            console.log(filePath);
            await file.download({ destination: filePath });
        }
    });
}

main().then();

gsutilの方が良さそう