PROSAGA码农传奇-gulp-Gulp用另一个文件的哈希更新文件的内容

<div class =“post-text”itemprop =“text”>
  <P>
    你可以编写一个从中获取结果的插件
     <code>
      hashsum
    </code>
     并简单地使用
     <code>
      fs
    </code>
     修改你的json。
  </p>
  <P>
    这是一个天真的实现：
  </p>
   <pre>
    <code>
      const fs = require('fs')
const path = require('path')
const through = require('through2')
const hashsum = require('gulp-hashsum')

const modifyJson = ({ fileName, src, property }) => through.obj((file, _, cb) => {
  const { name } = path.parse(file.path)
  if (name !== fileName) return cb(null, file)

const pathToJson = path.resolve(__dirname, src)
  if (!fs.existsSync(pathToJson)) {
    return cb(new Error(`${src} doesn't exist.`), file)
  }
  const json = JSON.parse(fs.readFileSync(pathToJson, 'utf8'))

const content = JSON.parse(file.contents)
  if (typeof json[property] === 'undefined') console.warn(`${src} doesn't has any property named '${property}' A new one will be created.`)
  json[property] = content
   fs.writeFileSync(pathToJson, JSON.stringify(json))

return cb(null, file)
})

</code>
  </pre>
  <P>
    用法：
  </p>
   <pre>
    <code>
      exports.modifyJson = () =>
  src(['app/**/*.js'])
  .pipe(hashsum({
    stream: true,
    json: true,
  }))
  .pipe(modifyJson({
    fileName: 'SHA1SUMS',
    src: './test.json',
    property: 'hashTable',
  }))

</code>
  </pre>
  <P>
    我有这个代码
    <a href="https://gist.github.com/d4rekanguok/294724b2ded30cb1373fa65c7c3a66c8" rel="nofollow noreferrer">
      要旨
    </A>
     这里。
  </p>
</DIV>