feat(cli): add json cache

packages/uni-cli-shared/lib/cache.js

@@ -4,11 +4,11 @@
  * 3.script-loader 修改缓存 usingComponents 节点
  * 5.webpack plugin 中获取被修改的 page.json,component.json 并 emitFile
  */
-const jsonFileMap = new Map()
+let jsonFileMap = new Map()
 const changedJsonFileSet = new Set()
-const componentSet = new Set()
+let componentSet = new Set()
 
-const pageSet = new Set()
+let pageSet = new Set()
 
 let globalUsingComponents = Object.create(null)
 let appJsonUsingComponents = Object.create(null)
@@ -235,6 +235,32 @@ module.exports = {
   getJsonFileMap () {
     return jsonFileMap
   },
+  store () {
+    const files = Array.from(jsonFileMap.entries())
+    const pages = Array.from(pageSet)
+    const components = Array.from(componentSet)
+    const methods = componentSpecialMethods
+    return JSON.stringify({
+      files,
+      pages,
+      components,
+      methods,
+      globalUsingComponents,
+      appJsonUsingComponents
+    })
+  },
+  restore (jsonCache) {
+    jsonFileMap = new Map(jsonCache.files)
+    pageSet = new Set(jsonCache.pages)
+    componentSet = new Set(jsonCache.components)
+    componentSpecialMethods = jsonCache.methods
+    globalUsingComponents = jsonCache.globalUsingComponents
+    appJsonUsingComponents = jsonCache.appJsonUsingComponents
+    // restore 时,所有 file 均触发 change
+    for (let name of jsonFileMap.keys()) {
+      changedJsonFileSet.add(name)
+    }
+  },
   getJsonFile,
   getPagesJson,
   getComponentSet,

packages/vue-cli-plugin-uni/lib/cache-loader.js

@@ -51,7 +51,6 @@ function read (key, callback) {
       const mpTemplates = data['mpTemplates']
       if (mpTemplates) {
         Object.keys(mpTemplates).forEach(name => {
-          console.log('read=>write', name)
           fs.writeFileSync(name, mpTemplates[name], 'utf-8')
         })
       }

packages/vue-cli-plugin-uni/lib/env.js

+const fs = require('fs')
 const path = require('path')
+const mkdirp = require('mkdirp')
 
 // 初始化环境变量
 const defaultInputDir = '../../../../src'
@@ -119,6 +121,8 @@ if (process.env.UNI_PLATFORM === 'app-plus') {
     isNVueCompiler = false
   }
   if (platformOptions.renderer === 'native') {
+    // 纯原生目前不提供 cache
+    process.env.UNI_USING_CACHE = false
     process.env.UNI_USING_NATIVE = true
     process.env.UNI_USING_V8 = true
     process.env.UNI_OUTPUT_TMP_DIR = ''
@@ -258,6 +262,27 @@ if (runByHBuilderX) {
   }
 }
 
+if (process.env.UNI_USING_CACHE) { // 使用 cache, 拷贝 cache 的 json
+  const cacheJsonPath = path.resolve(
+    process.env.UNI_CLI_CONTEXT,
+    'node_modules/.cache/uni-pages-loader/' + process.env.UNI_PLATFORM,
+    'cache.json'
+  )
+  const cacheJsonDir = path.dirname(cacheJsonPath)
+
+  if (!fs.existsSync(cacheJsonDir)) { //  创建 cache 目录
+    mkdirp(cacheJsonDir)
+  } else {
+    if (fs.existsSync(cacheJsonPath)) {
+      // 设置 json 缓存
+      const {
+        restore
+      } = require('@dcloudio/uni-cli-shared/lib/cache')
+      restore(require(cacheJsonPath))
+    }
+  }
+}
+
 runByHBuilderX && console.log(`正在编译中...`)
 
 module.exports = {

packages/webpack-uni-mp-loader/lib/plugin/generate-json.js

+const fs = require('fs')
 const path = require('path')
 
 const {
@@ -82,7 +83,7 @@ function analyzeUsingComponents () {
   //       pages[name] = usingComponentsMap[name]
   //     }
   //     return pages
-  //   }, {})
+  //   }, {})
 }
 
 module.exports = function generateJson (compilation) {
@@ -153,7 +154,7 @@ module.exports = function generateJson (compilation) {
       !['app.js', 'manifest.js', 'project.config.js', 'project.swan.js'].includes(jsFile) &&
       !compilation.assets[jsFile]
     ) {
-      compilation.assets[jsFile] = {
+      const jsFileAsset = {
         size () {
           return Buffer.byteLength(EMPTY_COMPONENT, 'utf8')
         },
@@ -161,8 +162,9 @@ module.exports = function generateJson (compilation) {
           return EMPTY_COMPONENT
         }
       }
+      compilation.assets[jsFile] = jsFileAsset
     }
-    compilation.assets[name] = {
+    const jsonAsset = {
       size () {
         return Buffer.byteLength(source, 'utf8')
       },
@@ -170,5 +172,22 @@ module.exports = function generateJson (compilation) {
         return source
       }
     }
+
+    compilation.assets[name] = jsonAsset
+  }
+  if (process.env.UNI_USING_CACHE && jsonFileMap.size) {
+    setTimeout(() => {
+      const {
+        store
+      } = require('@dcloudio/uni-cli-shared/lib/cache')
+
+      const filepath = path.resolve(
+        process.env.UNI_CLI_CONTEXT,
+        'node_modules/.cache/uni-pages-loader/' + process.env.UNI_PLATFORM,
+        'cache.json'
+      )
+      // 异步写入 cache,避免影响热更新性能
+      fs.writeFileSync(filepath, store())
+    }, 50)
   }
 }