mili/src/copy.js

vue + koa isomorphic boilerplate

const fs = require('fs')
const { extname, basename } = require('path')
const { promisify } = require('util')


const readFile = promisify(fs.readFile)
const writeFile = promisify(fs.writeFile)

const commentator = [
  {
    filenames: [],
    extnames: ['.js', '.ts'],
    create: (upgrade) => ([
      `// mili upgrade type: ${upgrade}`,
    ].join('\n')),
  },
  {
    filenames: [],
    // extnames: ['.md'],
    extnames: [],
    create: (upgrade) => ([
      `<!-- mili upgrade type: ${upgrade} -->`,
    ].join('\n')),
  },
  {
    filenames: ['.gitignore', '.npmrc'],
    extnames: ['.yml', '.yaml'],
    create: (upgrade) => ([
      `# mili upgrade type: ${upgrade}`,
    ].join('\n')),
  },
]


const appendFileHeader = file => {
  const ext = extname(file.targetPath)
  const filename = basename(file.targetPath)
  const cm = commentator.find(handler => (
    handler.extnames.includes(ext) || handler.filenames.includes(filename)
  ))

  if (!cm) return file

  if (file.upgrade === 'cover') {
    const comment = cm.create(file.upgrade, 'This file will be cover when upgrade template')
    return { ...file, content: `${comment}\n${file.content}` }
  } else if (file.upgrade === 'merge') {
    const comment = cm.create(file.upgrade, 'This file will be merge when upgrade template')
    return { ...file, content: `${comment}\n${file.content}` }
  }

  return file
}


module.exports = async ({ upgrade, path, view , handlers, encoding, targetPath }, root) => {
  const content = await readFile(path, encoding)
  let file = handlers.reduce(
    (file, handler) => handler.genFile(file),
    { path, view, content, upgrade, encoding, targetPath }
  )

  file = appendFileHeader(file)

  await writeFile(targetPath, file.content, encoding)
}