# Buidler SPDX License Identifer

Prepend Solidity source files in Buidler projects with the SPDX License Identifier specified in `package.json`.

## Installation

```bash
yarn add --dev buidler-spdx-license-identifier
```

## Usage

Load plugin in Buidler config:

```javascript
usePlugin('buidler-spdx-license-identifier');
```

Add configuration under the `spdxLicenseIdentifier` key:

| option | description | default |
|-|-|-|
| `overwrite` | whether to overwrite existing SPDX license identifiers | `false` |
| `runOnCompile` | whether to automatically prepend identifiers during compilation | `false` |

```javascript
spdxLicenseIdentifier: {
  overwrite: true,
  runOnCompile: true,
}
```

The included Buidler task may be run manually:

```bash
yarn run buidler prepend-spdx-license
```

Files which do not contain a license identifier will be prepended with one.  Files with a license identifier which does not match that which is specified in `package.json` may be updated, depending on configuration.

### TypeScript Support

For TypeScript compatibility, add `'node_modules/buidler-spdx-license-identifier/type-extensions.d.ts'` to the `files` array in `tsconfig.json`.