/**
 * get modify files
 */
const shell = require('shelljs')
const modifyFiles = shell
  .exec('git status -s | cut -c4-', { silent: true })
  .stdout.trim()
  .split(/\s/g)

function getFilePath (fileName, ext, folders = 'src') {
  const reg = new RegExp(`^(${folders})\\/.*\\.(${ext})$`)
  if (reg.test(fileName)) return fileName
}

/**
 * get modifyFile.`ext` in `folders`
 * @param {String} ext js|vue
 * @param {String} [folders=src] src|build
 */
function getFileRules (ext, folders) {
  const files = []
  modifyFiles.forEach(fileName => {
    const filePath = getFilePath(fileName, ext, folders)
    if (filePath) files.push(filePath)
  })

  const fileRules = files.join(' ')
  if (fileRules.length) {
    return fileRules
  } else {
    console.log(`[Modify Files] No modify files '${ext}' in '${folders}'`)
    process.exit()
  }
}

exports.getFileRules = getFileRules