text: import fs from 'fs'
  
  export default function(configFile) {
    if (!fs.existsSync(configFile)) {
      throw new Error(`Specified Tailwind config file "${configFile}" doesn't exist.`)
    }
  
    return function(css, opts) {
      opts.messages.push({
        type: 'dependency',
        file: configFile,
        parent: css.source.input.file,
      })
    }
  }
  