upload-image.ts

// upload-image.ts
// Upload a file to S3 or Cloudflare R2 using Bun's built-in S3 client.
// No third-party dependencies required.
//
// Usage:
//   bun run upload-image.ts <path-to-file> [key]
//
// Arguments:
//   <path-to-file>  Local file to upload
//   [key]           Optional S3 object key (defaults to the filename)
//
// Environment variables (via .env):
//   S3_ACCESS_KEY_ID      Your access key
//   S3_SECRET_ACCESS_KEY  Your secret key
//   S3_BUCKET             Bucket name
//   S3_ENDPOINT           S3/R2 endpoint URL
//   S3_REGION             Region (default: "auto" for R2)
//   S3_PUBLIC_URL         Public base URL for uploaded objects
//
// Examples:
//   bun run upload-image.ts ./photo.png
//   bun run upload-image.ts ./photo.png images/photo.png

import { S3Client, file } from "bun";

const client = new S3Client({
  accessKeyId: Bun.env.S3_ACCESS_KEY_ID!,
  secretAccessKey: Bun.env.S3_SECRET_ACCESS_KEY!,
  bucket: Bun.env.S3_BUCKET!,
  endpoint: Bun.env.S3_ENDPOINT, // e.g. https://<account-id>.r2.cloudflarestorage.com
  region: Bun.env.S3_REGION ?? "auto",
});

const imagePath = Bun.argv[2];
if (!imagePath) {
  console.error("Usage: bun run upload-image.ts <path-to-image>");
  process.exit(1);
}

const localFile = file(imagePath);
if (!(await localFile.exists())) {
  console.error(`File not found: ${imagePath}`);
  process.exit(1);
}

const key = Bun.argv[3] ?? localFile.name!.split("/").pop()!;
const bytes = await localFile.bytes();

console.log(`Uploading ${imagePath} → ${key} (${bytes.length} bytes)`);

await client.write(key, bytes, { type: localFile.type, acl: "public-read" });

const publicUrl = `${Bun.env.S3_PUBLIC_URL}/${key}`;
console.log(`Done: ${publicUrl}`);