@solidstate/hardhat-license-identifier/dist/hooks/solidity.js

Prepend local Solidity source files with an SPDX License Identifier

import { hasMatchingLicense, prependLicenseToFileContent, readLicenseFromPackageJson, } from '../lib/license_identifier.js';
import { writeUtf8File } from '@nomicfoundation/hardhat-utils/fs';
export default async () => ({
    preprocessProjectFileBeforeBuilding: async (context, sourceName, fsPath, fileContent, solcVersion, next) => {
        const config = context.config.licenseIdentifier;
        if (config.runOnCompile) {
            const license = config.license ??
                (await readLicenseFromPackageJson(context.config.paths.root));
            const overwrite = config.overwrite;
            if (!hasMatchingLicense(fileContent, license, overwrite)) {
                fileContent = prependLicenseToFileContent(fileContent, license);
                await writeUtf8File(fsPath, fileContent);
            }
        }
        return await next(context, sourceName, fsPath, fileContent, solcVersion);
    },
});