Hardhat SPDX License Identifier

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

Versions of this plugin prior to 2.0.0 were released as buidler-spdx-license-identifier.

Installation

npm install --save-dev hardhat-spdx-license-identifier
# or
yarn add --dev hardhat-spdx-license-identifier

Usage

Load plugin in Hardhat config:

require('hardhat-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
only	Array of String matchers used to select included paths, defaults to all contracts if length is 0	[]
except	Array of String matchers used to exclude paths	[]

spdxLicenseIdentifier: {
  overwrite: true,
  runOnCompile: true,
  except: ['vendor/']
}

The included Hardhat task may be run manually:

npx hardhat prepend-spdx-license
# or
yarn run hardhat 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.