# Migration 🧳 Helper

> **Tiny helper library for migrating data.**

## Features

* Zero dependencies.
* 100% code coverage.
* TypeScript definitions included.

## Usage

```ts
import {migrate, Migration} from '@holllo/migration-helper';

// Your data that needs migrating.
const data = 'data';

// Your data's current version.
const version = '1.0.0';

// Create some migrations to apply.
const migrations: Array<Migration<string>> = [
  {
    version: '1.0.1',
    migrate: async (data: string) => `${data} migrated`,
  },
  {
    version: '1.0.2',
    migrate: async (data: string) => `${data} (again!)`,
  },
];

// Migrate your data.
const migrated = await migrate(data, version, migrations);

// Congratulations, your data is now on version 1.0.2!
console.log(migrated);
```

See [the tests directory](https://git.bauke.xyz/Holllo/migration-helper/src/branch/main/tests) for how to use `number`, `Date` or a custom way of versioning.

## License

Distributed under the [AGPL-3.0-or-later](https://spdx.org/licenses/AGPL-3.0-or-later.html) license, see [LICENSE](https://git.bauke.xyz/Holllo/migration-helper/src/branch/main/LICENSE) for more information.