Function getNextjsVersion

packages/next-codemod/lib/agents-md.ts:18–44

(cwd: string)

}

export function getNextjsVersion(cwd: string): NextjsVersionResult {
  try {
    const nextPkgPath = require.resolve('next/package.json', { paths: [cwd] })
    const pkg = JSON.parse(fs.readFileSync(nextPkgPath, 'utf-8'))
    return { version: pkg.version }
  } catch {
    // Not found at root - check for monorepo workspace
    const workspace = detectWorkspace(cwd)
    if (workspace.isMonorepo && workspace.packages.length > 0) {
      const highestVersion = findNextjsInWorkspace(cwd, workspace.packages)

      if (highestVersion) {
        return { version: highestVersion }
      }

      return {
        version: null,
        error: `No Next.js found in ${workspace.type} workspace packages.`,
      }
    }

    return {
      version: null,
      error: 'Next.js is not installed in this project.',
    }
  }
}

function versionToGitHubTag(version: string): string {
  return version.startsWith('v') ? version : `v${version}`