为nuxt项目写一个面包屑cli工具实现自动生成页面

[
 {
  "name": "应用", // 面包屑名称（在命令交互中输入）
  "path": "/app", // 面包屑对应路径（根据文件自动生成）
  "clickable": true, // 是否可点击跳转
  "isShow": true // 是否显示
 },
 {
  "name": "应用详情",
  "path": "/app/detail",
  "clickable": true, // 是否可点击跳转
  "isShow": true // 是否显示
 }
]

[
  {
    "name": "应用",
    "path": "/app",
    "clickable": true,
    "isShow": true
  }，
  {
    "name": "应用",
    "path": "/app/detail",
    "clickable": true,
    "isShow": true
  }
]

export const state = () => ({
  breadcrumbData: []
})

export const mutations = {
 setBreadcrumb (state, breadcrumbData) {
  state.breadcrumbData = breadcrumbData
 },

 setBreadcrumbByName (state, {oldName, newName}) {
  let curBreadcrumb = state.breadcrumbData.find(breadcrumb => breadcrumb.name === oldName)

  curBreadcrumb && (curBreadcrumb.name = newName)
 },
 
 setBreadcrumbByPath (state, {path, name}) {
  let curBreadcrumb = state.breadcrumbData.find(
   breadcrumb => breadcrumb.path === path
  )
  curBreadcrumb && (curBreadcrumb.name = name)
 }
}

import breadcrumbs from '@/ponents/breadcrumb/breadcrumb.config.json'

function path2Arr(path) {
 return path.split('/').filter(p => p)
}

function matchBreadcrumbData (matchPath) {
 return path2Arr(matchPath)
  .map(path => {
   path = path.replace(/^:([^:?]+)(\?)?$/, (match, $1) => {
    return `_${$1}`
   })
   return '/' + path
  })
  .map((path, index, paths) => {

   // 第 0 个不需拼接
   if (index) {
    let result = ''
    for (let i = 0; i <= index; i++) {
     result += paths[i]
    }
    return result
   }
   return path
  })
  .map(path => {
   const item = breadcrumbs.find(bread => bread.path === path)
   if (item) {
    return item
   }
   return {
    name: path.split('/').pop(),
    path,
    clickable: false,
    isShow: true
   }
  })
}

export default ({ app, store }) => {
 app.router.beforeEach((to, from, next) => {
  const toPathArr = path2Arr(to.path)
  const toPathArrLength = toPathArr.length
  let matchPath = ''

  // 从 matched 中找出当前路径的路由配置
  for (let match of to.matched) {
   const matchPathArr = path2Arr(match.path)
   if (matchPathArr.length === toPathArrLength) {
    matchPath = match.path
    break
   }
  }

  const breadcrumbData = matchBreadcrumbData(matchPath)

  store.mit('breadcrumb/setBreadcrumb', breadcrumbData)
  next()
 })
}

<template>
 <div class="bcg-breadcrumb" v-if="isBreadcrumbShow">
  <el-breadcrumb separator="/">
   <el-breadcrumb-item
    v-for="(item, index) in breadcrumbData"
    :to="item.clickable ? item.path : ''"
    :key="index">
    {{ item.name }}
   </el-breadcrumb-item>
  </el-breadcrumb>
 </div>
</template>

<script>
import breadcrumbs from "./breadcrumb.config"
export default {
 name: 'Breadcrumb',
 puted: {
  isBreadcrumbShow () {
   return this.curBreadcrumb && this.curBreadcrumb.isShow
  },
  breadcrumbData () {
   return this.$store.state.breadcrumb.breadcrumbData
  },
  curBreadcrumb () {
   return this.breadcrumbData[this.breadcrumbData.length - 1]
  }
 }
}
</script>

lib // 存命令行文件
  |-- bcg.js
template // 存模版
  |-- breadcrumb // 面包屑配置文件与组件，将生成在项目 @/ponents 中
    |-- breadcrumb.config.json
    |-- index.vue
  |-- braadcrumb.js // vuex 相关文件，将生成在项目 @/store 中
  |-- new-page.vue // 新文件模版，将生成在命令行输入的新路径中
  |-- route.js // 路由前置守卫配置文件，将生成在 @/plugins 中
test // 单元测试相关文件

// 执行 bcg 命令时，就会执行 lib/bcg.js 的代码
{
 "bin": {
  "bcg": "lib/bcg.js"
 }
}

bcg init

bcg new <file-path> -b <base-path>

#!/usr/bin/env node
const path = require('path')
const fs = require('fs-extra')

const boxen = require('boxen')
const inquirer = require('inquirer')
const mander = require('mander')
const Handlebars = require('handlebars')

const {
 createPathArr,
 log,
 errorLog,
 suessLog,
 infoLog,
 copyFile
} = require('./utils')

const VUE_SUFFIX = '.vue'

const source = {
 VUE_PAGE_PATH: path.resolve(__dirname, '../template/new-page.vue'),
 BREADCRUMB_COMPONENT_PATH: path.resolve(__dirname, '../template/breadcrumb'),
 PLUGIN_PATH: path.resolve(__dirname, '../template/route.js'),
 STORE_PATH: path.resolve(__dirname, '../template/breadcrumb.js')
}

const target = {
 BREADCRUMB_COMPONENT_PATH: 'src/ponents/breadcrumb',
 BREADCRUMB_JSON_PATH: 'src/ponents/breadcrumb/breadcrumb.config.json',
 PLUGIN_PATH: 'src/plugins/route.js',
 STORE_PATH: 'src/store/breadcrumb.js'
}

function initBreadCrumbs() {
 try {
  copyFile(source.BREADCRUMB_COMPONENT_PATH, target.BREADCRUMB_COMPONENT_PATH)
  copyFile(source.PLUGIN_PATH, target.PLUGIN_PATH)
  copyFile(source.STORE_PATH, target.STORE_PATH)
 } catch (err) {
  throw err
 }
}

function generateVueFile(newPagePath) {
 try {
  if (fs.existsSync(newPagePath)) {
   log(errorLog(`${newPagePath} 已存在`))
   return
  }

  const fileName = path.basename(newPagePath).replace(VUE_SUFFIX, '')
  const vuePage = fs.readFileSync(source.VUE_PAGE_PATH, 'utf8')
  const template = Handlebars.pile(vuePage)
  const result = template({ filename: fileName })

  fs.outputFileSync(newPagePath, result)

  log(suessLog('\nvue页面生成成功咯\n'))
 } catch (err) {
  throw err
 }
}

function updateConfiguration(filePath, {
 clickable,
 isShow
} = {}) {
 try {
  if (!fs.existsSync(target.BREADCRUMB_JSON_PATH)) {
   log(errorLog('面包屑配置文件不存在, 配置失败咯, 可通过 bcg init 生成相关文件'))
   return
  }

  let pathArr = createPathArr(filePath)
  const configurationArr = fs.readJsonSync(target.BREADCRUMB_JSON_PATH)

  // 如果已经有配置就过滤掉
  pathArr = pathArr.filter(pathItem => !configurationArr.some(configurationItem => configurationItem.path === pathItem))

  const questions = pathArr.map(pathItem => {
   return {
    type: 'input',
    name: pathItem,
    message: `请输入 ${pathItem} 的面包屑显示名称`,
    default: pathItem
   }
  })

  inquirer.prompt(questions).then(answers => {
   const pathArrLastIdx = pathArr.length - 1

   pathArr.forEach((pathItem, index) => {
    configurationArr.push({
     clickable: index === pathArrLastIdx ? clickable : false,
     isShow: index === pathArrLastIdx ? isShow : true,
     name: answers[pathItem],
     path: pathItem
    })
   })

   fs.writeJsonSync(target.BREADCRUMB_JSON_PATH, configurationArr, {
    spaces: 2
   })

   log(suessLog('\n生成面包屑配置成功咯'))
  })
 } catch (err) {
  log(errorLog('生成面包屑配置失败咯'))
  throw err
 }
}

function generating(newPagePath, filePath) {
 inquirer.prompt([
  {
   type: 'confirm',
   name: 'clickable',
   message: '是否可点击跳转? (默认 yes)',
   default: true
  },
  {
   type: 'confirm',
   name: 'isShow',
   message: '是否展示面包屑? (默认 yes)',
   default: true
  },
  {
   type: 'confirm',
   name: 'onlyConfig',
   message: '是否仅生成配置而不生成文件? (默认 no)',
   default: false
  }
 ]).then(({ clickable, isShow, onlyConfig }) => {
  if (onlyConfig) {
   updateConfiguration(filePath, { clickable, isShow })
   return
  }

  generateVueFile(newPagePath)
  updateConfiguration(filePath, { clickable, isShow })
 })
}

const program = new mander.Command()

program
 .mand('init')
 .description('初始化面包屑')
 .action(initBreadCrumbs)

program
 .version('0.1.0')
 .mand('new <file-path>')
 .description('生成页面并配置面包屑，默认基础路径为 src/pages，可通过 -b 修改')
 .option('-b, --basePath <base-path>', '修改基础路径 (不要以 / 开头)')
 .action((filePath, opts) => {
  filePath = filePath.endsWith(VUE_SUFFIX) ? filePath : `${filePath}${VUE_SUFFIX}`
  const basePath = opts.basePath || 'src/pages'
  const newPagePath = path.join(basePath, filePath)

  log(
   infoLog(
    boxen(`即将配置 ${newPagePath}`, {
     padding: 1,
     margin: 1,
     borderStyle: 'round'
    })
   )
  )

  generating(newPagePath, filePath)
 })

program.parse(process.argv)

if (!process.argv.slice(2)[0]) {
 program.help()
}