Week28-脚手架发布模块架构设计和核心流程开发

'use strict';
const Command = require('@cloudscope-cli/command')
const log = require('@cloudscope-cli/log')
class PublishCommand extends Command {
    init(){
        // 处理参数
        console.log('init',this._argv)
    }

    async exec(){
        try {
            const startTime = new Date().getTime()
            //1. 初始化检查
            this.prepare()
            //2.Git Flow自动化

            //3.云构建 + 云发布
            const endTime = new Date().getTime()
            log.info('本次发布耗时',Math.floor(endTime-startTime)/1000+'秒')
        } catch (e) {
            log.error(e.message)
            if(process.env.LOG_LEVEL === 'verbose'){
                log.error(e.message)
            }
        }
    }
  
   prepare(){
    
	 }
}


function init(argv){
    return new PublishCommand(argv)
}
module.exports = init
module.exports.PublishCommand = PublishCommand;

prepare(){
  // 1.确认项目是否为npm项目
  const projectPath =  process.cwd()
  const pkgPath = path.resolve(projectPath,'package.json')
  log.verbose('package.json',pkgPath)
  if(!fs.existsSync(pkgPath)){
    throw new Error('package.json不存在')
  }
  //2. 确认是否包含name\version\build命令
  const pkg = fse.readJsonSync(pkgPath)
  const {name,version,scripts} = pkg
  if(!name || !version || !scripts || !scripts.build ){
    throw new Error('package.json信息不全，请检查是否存在name、version和scripts(需提供build命令)')
  }
  this.projectInfo = {name,version,dir:projectPath}
}

// src/router.js
const {createWebHistory,createRouter} from 'vue-router',
import Home from './pages/Home'
import My from './pages/My'
import Order from './pages/Order'

const routes = [
    path:'/',name:'root',redirect:'/home'
},{
    path:'/home',name:'home',component:Home
},{
    path:'/my',name:'my',component:My
},{
    path:'/order',name:'order',component:Order
}]

const routerHitory = createWebHistory()
const router = createRouter({
	history:routerHitory,
  routes
})

export default router;

// App.vue
<template>
  <div id="vue3">vue3 template</div>
  <router-link to='/home'>Home | </router-link>
  <router-link to='/order'>Order | </router-link>
  <router-link to='/my'>My | </router-link>
  <router-view />
</template>

<script>
export default {
  name: 'Vue3',
}
</script>

<style>
#vue3 {
  width: 100%;
  height: 100%;
}
</style>

server {
       listen       8081;
       server_name resource;
       root /Users/liumingzhou/XXXXX/dist;
       autoindex on;
       location / {
         //跨域设置
          add_header  Access-Control-Allow-Origin *;
          try_files: $uri  $uri/ /index.html;
       }
			  // 缓存设置
       add_header   Cache-Control "no-cache, must-revalidate";
    }

function createWebHistory(base) {
  // 传入的base进行处理
    base = normalizeBase(base);
  
  //historyNavigation提供了一些方法：location/push/replace/state
  // 该方法的实现浏览器URL变化但页面不刷新（push），核心是使用了浏览器对象模型history.pushState()和history.replaceState()方法。
    const historyNavigation = useHistoryStateNavigation(base);
  
  //生成一个listener：destory和listen方法
    const historyListeners = useHistoryListeners(base, historyNavigation.state, historyNavigation.location, historyNavigation.replace);
    function go(delta, triggerListeners = true) {
        if (!triggerListeners)
            historyListeners.pauseListeners();
        history.go(delta);
    }
  
  //将上面的事件拼装到一起，生成一个routerHistory对象返回
    const routerHistory = assign({
        // it's overridden right after
        location: '',
        base,
        go,
        createHref: createHref.bind(null, base),
    }, historyNavigation, historyListeners);
    Object.defineProperty(routerHistory, 'location', {
        enumerable: true,
        get: () => historyNavigation.location.value,
    });
    Object.defineProperty(routerHistory, 'state', {
        enumerable: true,
        get: () => historyNavigation.state.value,
    });
    return routerHistory;
}

// 从调用createRouter处，options中传入的参数为：history和routes
function createRouter(options) {
  // 第一步生成matcher，matcher的作用是实现路由匹配
  // createRouterMatcher会为每一个简单或复杂的路由生成一个正则表达式
    const matcher = createRouterMatcher(options.routes, options);
    let parseQuery$1 = options.parseQuery || parseQuery;
    let stringifyQuery$1 = options.stringifyQuery || stringifyQuery;
  
  // 拿到history对象，是createWebHistory或者为createWebHashHistory
    let routerHistory = options.history;
    if ((process.env.NODE_ENV !== 'production') && !routerHistory)
        throw new Error('Provide the "history" option when calling "createRouter()":' +
            ' https://next.router.vuejs.org/api/#history.');
  
  //一些路由守卫的初始化、useCallbacks方法返回一个闭包。
  //每一个路由守卫都对应了一个闭包(代码就不贴了，主要返回了三个方法：add,list,reset,主要作用是缓存路由守卫)。
    const beforeGuards = useCallbacks();
    const beforeResolveGuards = useCallbacks();
    const afterGuards = useCallbacks();
  
  // 生成默认router
    const currentRoute = shallowRef(START_LOCATION_NORMALIZED);

………………
//  一些初始化操作
………………
  
  // 这里的router即为最终的router对象，包含一系列的属性和方法
    const router = {
        currentRoute,
        addRoute,
        removeRoute,
        hasRoute,
        getRoutes,
        resolve,
        options,
        push,
        replace,
        go,
        back: () => go(-1),
        forward: () => go(1),
        beforeEach: beforeGuards.add,
        beforeResolve: beforeResolveGuards.add,
        afterEach: afterGuards.add,
        onError: errorHandlers.add,
        isReady,
      
      //此处的install方法是在执行app.user(router)的时候会执行到这里(即当这个router被返回到main.js后，下一步就会执行app.user(router),然后就会进入到这方法中去)
        install(app) {
            const router = this;
          
          //在此处注册了组件RouterLink和RouterView
            app.component('RouterLink', RouterLink);
            app.component('RouterView', RouterView);
          
          //全局主注册了$router $route
            app.config.globalProperties.$router = router;
            Object.defineProperty(app.config.globalProperties, '$route', {
                enumerable: true,
                get: () => unref(currentRoute),
            });
            if (isBrowser &&!started &&
                currentRoute.value === START_LOCATION_NORMALIZED) {
                started = true;
              
              //浏览器中push后，就会进行页面的渲染
                push(routerHistory.location).catch(err => {
                    if ((process.env.NODE_ENV !== 'production'))
                        warn('Unexpected error when starting the router:', err);
                });
            }
            const reactiveRoute = {};
            for (let key in START_LOCATION_NORMALIZED) {
                reactiveRoute[key] = computed(() => currentRoute.value[key]);
            }
          
          // 使用app.provide来做组件的传递
          // router-view和router-link中的参数是通过这里传递下去的
          // 关于provide的用法，见本节内容往下
            app.provide(routerKey, router);
            app.provide(routeLocationKey, reactive(reactiveRoute));
            app.provide(routerViewLocationKey, currentRoute);
            let unmountApp = app.unmount;
            installedApps.add(app);
            app.unmount = function () {
                installedApps.delete(app);
                if (installedApps.size < 1) {
                    removeHistoryListener();
                    currentRoute.value = START_LOCATION_NORMALIZED;
                    started = false;
                    ready = false;
                }
                unmountApp();
            };
            
        },
    };
    return router;

<button @click="jump">Jump</button>
………………
<script>
import { useRouter } from 'vue-router'
export default {
  name: 'App',
  setup(){
    const router = useRouter();
    return{
      jump(){
        // eslint-disable-next-line no-debugger
        debugger
        router.push('/order')
      }
    }
    
  }
}
</script>

function resolve(rawLocation, currentLocation) {
  // 第一步是拿到currentLocation，即当前路由相关信息 【/home相关的】
        currentLocation = assign({}, currentLocation || currentRoute.value);
  
  // 判断传进来的路由‘/order’参数是不是string
        if (typeof rawLocation === 'string') {
          
          //进行一个形式的格式化吧
            let locationNormalized = parseURL(parseQuery$1, rawLocation, currentLocation.path);
          
          //最关键的一步是调用matcher下的resolve方法，传入两个参数 ‘/order’和‘/home’，到这里我们需要继续step into到这个方法中去调试。关键代码为： matchers.find(m => m.re.test(path)); 
            let matchedRoute = matcher.resolve({ path: locationNormalized.path }, currentLocation);
            let href = routerHistory.createHref(locationNormalized.fullPath);
            if ((process.env.NODE_ENV !== 'production')) {
                if (href.startsWith('//'))
                    warn(`Location "${rawLocation}" resolved to "${href}". A resolved location cannot start with multiple slashes.`);
                else if (!matchedRoute.matched.length) {
                    warn(`No match found for location with path "${rawLocation}"`);
                }
            }
            // locationNormalized is always a new object
            return assign(locationNormalized, matchedRoute, {
                params: decodeParams(matchedRoute.params),
                hash: decode(locationNormalized.hash),
                redirectedFrom: undefined,
                href,
            });
        }
        …………………………………………
    }

import { defineComponent,h } from 'vue'
// import  Home from '../pages/Home';
 const TestComponent2 = defineComponent({
    name:'TestComponent2',
    props:{},
    setup(props, {slots} ){
        return ()=> {
            return h('div',{
                class:'test-component2',
                onClick(){
                    alert('click')
                }
            },slots.default())
        }
        // return () =>{
        //     return h(Home,{
        //         onClick(){
        //             alert('You Clicked the Home Component!')
        //         }
        //     })
        // }
    }
 })

 export default TestComponent2

const RouterViewImpl = /*#__PURE__*/ defineComponent({
    name: 'RouterView',
    inheritAttrs: false,
    props: {
        name: {
            type: String,
            default: 'default',
        },
        route: Object,
    },
  // setup在整个组件初始化的时候只会执行一遍，但下面的render function，也就是40行的return部分会执行多次
    setup(props, { attrs, slots }) {
        (process.env.NODE_ENV !== 'production') && warnDeprecatedUsage();
      // injectedRoute决定router-view的刷新
        const injectedRoute = inject(routerViewLocationKey);
      // injectedRoute.value
        const routeToDisplay = computed(() => props.route || injectedRoute.value);
        const depth = inject(viewDepthKey, 0);
        const matchedRouteRef = computed(() => routeToDisplay.value.matched[depth]);
        provide(viewDepthKey, depth + 1);
        provide(matchedRouteKey, matchedRouteRef);
        provide(routerViewLocationKey, routeToDisplay);
      
      // 空的ref用来装载马上要渲染的view-router实例
        const viewRef = ref();
        watch(() => [viewRef.value, matchedRouteRef.value, props.name], ([instance, to, name], [oldInstance, from, oldName]) => {
            if (to) {
                to.instances[name] = instance;
                if (from && from !== to && instance && instance === oldInstance) {
                    if (!to.leaveGuards.size) {
                        to.leaveGuards = from.leaveGuards;
                    }
                    if (!to.updateGuards.size) {
                        to.updateGuards = from.updateGuards;
                    }
                }
            }
            if (instance &&
                to &&
                (!from || !isSameRouteRecord(to, from) || !oldInstance)) {
                (to.enterCallbacks[name] || []).forEach(callback => callback(instance));
            }
          // 默认为pre属性，post在页面渲染之后执行 watch 监听
        }, { flush: 'post' });
        return () => {
            const route = routeToDisplay.value;
            const matchedRoute = matchedRouteRef.value;
            const ViewComponent = matchedRoute && matchedRoute.components[props.name];
            const currentName = props.name;
            if (!ViewComponent) {
                return normalizeSlot(slots.default, { Component: ViewComponent, route });
            }
            const routePropsOption = matchedRoute.props[props.name];
            const routeProps = routePropsOption
                ? routePropsOption === true
                    ? route.params
                    : typeof routePropsOption === 'function'
                        ? routePropsOption(route)
                        : routePropsOption
                : null;
            const onVnodeUnmounted = vnode => {
                // remove the instance reference to prevent leak
                if (vnode.component.isUnmounted) {
                    matchedRoute.instances[currentName] = null;
                }
            };
            const component = h(ViewComponent, assign({}, routeProps, attrs, {
                onVnodeUnmounted,
                ref: viewRef,
            }));
            return (
            normalizeSlot(slots.default, { Component: component, route }) ||
                component);
        };
    },
});