uni-app 实现pages.json的模块加载。

对于一个日渐庞大的下uni-app项目，pages.json文件会变得有大有难以维护，所有就思考怎么样将pages.json文件才分易维护的小文件。
后来在阅读他的源码时发现了这个

const pagesJsonJsFileName = 'pages.js'

function processPagesJson (pagesJson, loader = {
  addDependency: function () {}
}) {
  const pagesJsonJsPath = path.resolve(process.env.UNI_INPUT_DIR, pagesJsonJsFileName)
  if (fs.existsSync(pagesJsonJsPath)) {
    delete require.cache[pagesJsonJsPath]
    const pagesJsonJsFn = require(pagesJsonJsPath)
    if (typeof pagesJsonJsFn === 'function') {
      pagesJson = pagesJsonJsFn(pagesJson, loader)
      if (!pagesJson) {
        console.error(`${pagesJsonJsFileName}  ${uniI18n.__('cliShared.requireReturnJsonObject')}`)
      }
    } else {
      console.error(`${pagesJsonJsFileName} ${uniI18n.__('cliShared.requireExportFunction')}`)
    }
  }
  // 将 subpackages 转换成 subPackages
  if (pagesJson.subpackages && !pagesJson.subPackages) {
    pagesJson.subPackages = pagesJson.subpackages
    delete pagesJson.subpackages
  }

  let uniNVueEntryPagePath
  if (pagesJson.pages && pagesJson.pages.length) { // 如果首页是 nvue
    if (isNVuePage(pagesJson.pages[0])) {
      uniNVueEntryPagePath = pagesJson.pages[0].path
    }
  }
  // pages
  filterPages(pagesJson.pages)
  // subPackages
  if (Array.isArray(pagesJson.subPackages) && pagesJson.subPackages.length) {
    pagesJson.subPackages.forEach(subPackage => {
      filterPages(subPackage.pages, subPackage.root)
    })
  }

  if (uniNVuePages.length) { // 直接挂在 pagesJson 上
    pagesJson.nvue = {
      pages: uniNVuePages.reverse()
    }
    if (uniNVueEntryPagePath) {
      pagesJson.nvue.entryPagePath = uniNVueEntryPagePath
    }
  }
  return pagesJson
}

于是就有下面这个工具
仓库地址
uni-module-pages