@lvl/wxapp-cli/lib/cmd/update.js

wxapp-cli

const {
  prepareEnv,
  error,
  purgeCache
} = require('../utils')
const fs = require('fs')
const path = require('path')
const { cliRoot } = require('../config/wxapp-cli.config')
const { execSync } = require('child_process')

/**
 * 匹配str中的key，将value替换成val
 * 
 * 
 */
function setkey (str, key, val) {
  return str.replace(new RegExp(`\\b${key}\\b['"]?\\s*?:\\s*?['"]([^'"]+)['"]`, 'g'), (a) => {
    return a.replace(/:\s*?['"]([^'"]+)['"]/, `: '${val}'`)
  })
}

async function update (cmd) {
  let {
    appCtx,
    cliTplConfig,
    cliTemplate
  } = await prepareEnv()

  // 将模版更新到最新版本
  execSync(`npm update ${cliTplConfig.template.module} --no-save --unsafe-perm`, {
    cwd: cliRoot,
    stdio: 'inherit'
  })

  // 清楚tpl包require缓存
  purgeCache(cliTplConfig.template.module)
  cliTemplate = require(cliTplConfig.template.module)

  // 更新 wxapp-cli.config.js 文件中 template 的 version
  const fp = path.resolve(appCtx, 'wxapp-cli.config.js')
  let data = fs.readFileSync(fp)
  data = data.toString()
  /**
   * 匹配更新data中的 template: { version: 'x.x.x' }
   * 
   * 
   */
  let tmp = data.split('{'), temp = null
  let i = 0, l = tmp.length, deep = 0
  const tplDeep = 2
  let flag = false
  for (; i < l; ++i) {
    ++deep
    temp = tmp[i].split('}')
    for (let j = 0; j < temp.length; ++j) {
      j > 0 && --deep
      if (deep === tplDeep) {
        let res = temp[j].match(/\b\w+\b/g)
        flag = res && res.length && res.indexOf('template') !== -1
      }
      if (flag && deep === tplDeep + 1) {
        temp[j] = setkey(temp[j], 'version', cliTemplate.version)
      }
    }
    tmp[i] = temp.join('}')
  }
  data = tmp.join('{')
  fs.writeFileSync(fp, data)
}

module.exports = (...args) => {
  return update(...args).catch(err => {
    error(err)
    process.exit(1)
  })
}