Method validateAppDir

packages/next-codemod/transforms/cra-to-next.ts:579–602

(files: string[])

  }

  private validateAppDir(files: string[]) {
    if (files.length > 1) {
      fatalMessage(
        `Error: only one directory should be provided for the cra-to-next transform, received ${files.join(
          ', '
        )}`
      )
    }
    const appDir = path.join(process.cwd(), files[0])
    let isValidDirectory = false

    try {
      isValidDirectory = fs.lstatSync(appDir).isDirectory()
    } catch (err) {
      // not a valid directory
    }

    if (!isValidDirectory) {
      fatalMessage(
        `Error: invalid directory provided for the cra-to-next transform, received ${appDir}`
      )
    }
    return appDir
  }
}

export default async function transformer(files, flags) {